diff --git a/benches/core/body.bench.ts b/benches/core/body.bench.ts index 0266813..a55466c 100644 --- a/benches/core/body.bench.ts +++ b/benches/core/body.bench.ts @@ -4,6 +4,7 @@ import * as cameraState from '../../src/core/CameraState'; import { FollowBodyThree } from '../../src/three/body/FollowBodyThree'; import { HardLockToTargetBodyThree } from '../../src/three/body/HardLockToTargetBodyThree'; +import { OrbitFollowBodyThree } from '../../src/three/body/OrbitFollowBodyThree'; import { PositionComposerBodyThree } from '../../src/three/body/PositionComposerBodyThree'; import { makeMovingMeshTarget, makeMovingTarget } from '../targets'; @@ -32,6 +33,31 @@ group('Body.update @body', () => { }); }); + bench('OrbitFollow (damping, axis moving)', function* () { + const { object, step } = makeMovingTarget(); + const body = new OrbitFollowBodyThree(object, { damping: 0.5 }); + const out = cameraState.create(); + yield warm(() => { + step(); + body.horizontal.applyDelta(0.5); + body.update(out, 0.016, false); + return out.position[0]; + }); + }); + + bench('OrbitFollow (threeRing, damping, axis moving)', function* () { + const { object, step } = makeMovingTarget(); + const body = new OrbitFollowBodyThree(object, { orbitStyle: 'threeRing', damping: 0.5 }); + const out = cameraState.create(); + yield warm(() => { + step(); + body.horizontal.applyDelta(0.5); + body.vertical.applyDelta(Math.sin(body.horizontal.value) * 0.5); + body.update(out, 0.016, false); + return out.position[0]; + }); + }); + bench('PositionComposer (deadZone + hardLimit)', function* () { const { object, step } = makeMovingTarget(); const body = new PositionComposerBodyThree(object, { diff --git a/docs/advanced/custom-components.mdx b/docs/advanced/custom-components.mdx index e2956c6..2bbcda4 100644 --- a/docs/advanced/custom-components.mdx +++ b/docs/advanced/custom-components.mdx @@ -81,6 +81,7 @@ export function pointerDrift(pointer: { x: number; y: number }, strength = 0.1, | `target`, `hasTarget` | `Vec3`, `boolean` | The point the Body follows, if any. Used by [blend hints](/blending/introduction#blend-hints). | | `lookAtTarget`, `hasLookAtTarget` | `Vec3`, `boolean` | The point the Aim looks at, if any. | | `referenceUp` | `Vec3` | Which way is up for Aims. Defaults to `[0, 1, 0]`. | +| `rotationDampingBypass` | `Quat` | How far a Body turned the camera this frame, for example around an orbit. Aims with damping follow this turn right away. Reset to identity every frame. | Vectors are plain arrays (`[x, y, z]`, quaternions `[x, y, z, w]`) from [`math`](https://github.com/pmndrs/math), which klipp depends on. Use its `vec3` and `quat` functions to work with them, or copy to three.js with `vector.fromArray(out.position)`. diff --git a/docs/body/camera-controls.mdx b/docs/body/camera-controls.mdx index 1335173..9fdc38d 100644 --- a/docs/body/camera-controls.mdx +++ b/docs/body/camera-controls.mdx @@ -1,7 +1,7 @@ --- title: CameraControls description: Lets the user orbit, pan and zoom with the mouse or touch. -nav: 24 +nav: 25 --- A user-controlled orbit camera, built on [`camera-controls`](https://github.com/yomotsu/camera-controls). It still takes part in priority and blending like any other camera. Unlike other Bodies, it controls both position and rotation, so don't add an Aim next to it. diff --git a/docs/body/follow.mdx b/docs/body/follow.mdx index 543afb6..f3de3af 100644 --- a/docs/body/follow.mdx +++ b/docs/body/follow.mdx @@ -12,7 +12,8 @@ Keeps the camera at `offset` from the target. By default the offset turns with t | ------- | ----------- | ------- | | `target` | What to follow. See [Targets](/getting-started/core-concepts#targets). | | | `offset` | Where the camera sits relative to the target. | `[0, 0, 10]` | -| `damping` | Seconds to catch up with the target. `0` is instant. See [Damping](/getting-started/core-concepts#damping). | `0` | +| `damping` | Seconds to catch up with the target's position. `0` is instant. See [Damping](/getting-started/core-concepts#damping). | `0` | +| `rotationDamping` | Seconds to turn with the target, for every `bindingMode` but `worldSpace`. `0` is instant. | `0` | | `maxSpeed` | Maximum catch-up speed, in units per second. | `Infinity` | | `bindingMode` | How the offset turns with the target. See below. | `BindingModes.lockToTarget` | @@ -23,7 +24,7 @@ Keeps the camera at `offset` from the target. By default the offset turns with t | `lockToTarget` | full rotation, including roll. | | `lockToTargetNoRoll` | yaw and pitch, but never rolls. | | `lockToTargetWithWorldUp` | yaw only. Good for flying or jumping targets. | -| `lockToTargetOnAssign` | rotation at the moment `target` is set, then stays fixed. | +| `lockToTargetOnAssign` | rotation at the moment `target` is set, the camera goes live or this mode is chosen, then stays fixed. | | `worldSpace` | nothing. The offset is always in world space. | A target without rotation, like a fixed point, always uses world space. diff --git a/docs/body/introduction.mdx b/docs/body/introduction.mdx index 21ac584..41b5dcc 100644 --- a/docs/body/introduction.mdx +++ b/docs/body/introduction.mdx @@ -12,6 +12,7 @@ A Body decides where the camera is. Where it looks is up to the [Aim](/aim/intro | ---- | ---------- | | [`HardLockToTarget`](/body/hard-lock-to-target) | Placing the camera exactly on a target: first person, a camera mounted on something, a fixed spot. | | [`Follow`](/body/follow) | Keeping a fixed offset from a target: chase cameras, third person. | +| [`OrbitFollow`](/body/orbit-follow) | Letting the user orbit and zoom around a target: third person, inspecting an object. | | [`PositionComposer`](/body/position-composer) | Keeping a target at a spot on screen: top-down, side-scrollers, anything with a fixed rotation. | | [`CameraControls`](/body/camera-controls) | Letting the user orbit, pan and zoom. three.js and React only. | diff --git a/docs/body/orbit-follow.mdx b/docs/body/orbit-follow.mdx new file mode 100644 index 0000000..f43220b --- /dev/null +++ b/docs/body/orbit-follow.mdx @@ -0,0 +1,148 @@ +--- +title: OrbitFollow +description: Lets the user orbit and zoom around a target. +nav: 23 +--- + +Puts the camera on a sphere around the target, or on a surface through [three rings](#three-rings). Three [`InputAxis`](/input/input-axis) pick the spot: `horizontal` goes around the target and `vertical` up and down, both in degrees, and `radial` zooms. They can be driven by the mouse, touch, the wheel and pinches through an [input controller](/input/input-controller), or from code. Pair it with an Aim that looks at the same target, like [`HardLookAt`](/aim/hard-look-at), for an orbit or third person camera. + +The camera sits `radius × exp(radial)` away from the target. `radial` is the natural log of the zoom: `0` is `radius`, `ln 2` twice as far, `ln 0.5` half as far. That way each step of the wheel zooms by the same ratio near and far, and a pinch zooms exactly as much as the fingers spread. + +To start from a specific spot, pass a `position` to the camera's [`initialState`](/api/virtual-camera#initialstate). `horizontal` and `vertical` are set from its direction around the target, `radial` keeps its value. Later on, `setFromPosition(position)` and `setFromRotation(rotation)` on the body ease the camera there with the axes' damping. + +## Settings + +| Setting | Description | Default | +| ------- | ----------- | ------- | +| `target` | What to orbit. See [Targets](/getting-started/core-concepts#targets). | | +| `orbitStyle` | `'sphere'`, or `'threeRing'` for a surface through three rings. | `'sphere'` | +| `radius` | Distance from the target while `radial` is `0`, for `'sphere'`. Changes ease in with the `radial` axis' `damping`. | `10` | +| `orbits` | The `top`, `center` and `bottom` ring for `'threeRing'`, each a `radius` and a `height` above the target. | see [Three rings](#three-rings) | +| `splineCurvature` | How strongly the `'threeRing'` surface curves between the rings, from `0` to `1`. | `0` | +| `targetOffset` | Center of the orbit relative to the target, turned by `bindingMode`. | `[0, 0, 0]` | +| `bindingMode` | How the orbit turns with the target. See [Follow](/body/follow#bindingmode). | `BindingModes.worldSpace` | +| `damping` | Seconds to catch up with the target. See [Damping](#damping). | `0` | +| `rotationDamping` | Seconds to turn with the target, for every `bindingMode` but `worldSpace`. | `0` | +| `maxSpeed` | Maximum catch-up speed, in units per second. | `Infinity` | +| `recenteringTarget` | Where `horizontal` recenters to: `'trackingTarget'` brings the camera back behind the target, `'axisCenter'` to the axis' `center`. | `'trackingTarget'` | +| `horizontal`, `vertical`, `radial` | React only. Settings for each axis, like `range`, `damping` or `recentering`. On the core and in three.js, set them on `body.horizontal` and the others. | see [Axes](#axes) | +| `autoNormalize` | React only. Keep `horizontal` inside its range after each drag. `autoNormalize` on the axis elsewhere. | `false` | +| `debug` | React only. Draws the orbit in the scene. See [Debugging](/debugging/introduction#orbits). | `false` | + +## Axes + +| Axis | Range | Center | Wraps | +| ---- | ----- | ------ | ----- | +| `horizontal` | `[-180, 180]` | `0`, the camera on the target's `+Z` side | yes | +| `vertical` | `[-90, 90]` | `0`, level with the target | no | +| `radial` | `[ln 0.5, ln 2]` | `0` | no | + +Every axis starts at its `center`. Dragging right with a positive `gain` turns the view right, the same way as [`PanTilt`](/aim/pan-tilt). + +Axes with the same `recentering.time` [recenter](/input/input-axis#recentering) together: input on one of them restarts the wait on the others. With `recenteringTarget: 'trackingTarget'`, the default, `horizontal` recenters behind the target's forward, `-Z`, whatever the `bindingMode`. + +## Three rings + +With `orbitStyle: 'threeRing'`, `vertical` runs from the `bottom` ring at the start of its range, through `center`, to the `top` ring at its end, and `radial` scales the whole surface. The rings let the camera come closer when it looks from above or below. + +By default all three rings have a `radius` of `10`, at heights `-10`, `0` and `10`: a plain cylinder whose center ring is where the sphere starts. + +## Damping + +`damping` makes the camera lag behind a moving target. Going around the orbit is never delayed by it, the camera turns around the target right away. To smooth the input itself, set `damping` on the axes. + +An Aim with damping, like [`RotationComposer`](/aim/rotation-composer), also follows the turns of the orbit without its damping, so the target stays in place on screen while the user drags. + +## Usage + + + + Core + three.js + React Three Fiber + + + +```ts +import { HardLookAtAim, OrbitFollowBody, targetPose } from '@kvvasuu/klipp'; +import { InputControllerDom } from '@kvvasuu/klipp/dom'; + +const player = targetPose.create(); // keep player.position up to date + +const body = new OrbitFollowBody(player, { radius: 8, damping: 0.3 }); +body.radial.damping = 0.15; +camera.body = body; +camera.aim = new HardLookAtAim(player); + +const orbit = { axes: { x: body.horizontal, y: body.vertical }, gain: 0.3 }; +const controller = new InputControllerDom({ + mouseButtons: { left: orbit }, + touches: { one: orbit }, + wheel: { axis: body.radial, gain: 0.001, invert: true }, + pinch: { axis: body.radial, invert: true }, +}); +klipp.whileOnScreen(camera, () => { + controller.connect(canvas); + return () => controller.disconnect(); +}); +klipp.registerUpdate(() => controller.update()); +``` + +Scrolling up and spreading a pinch are positive, while zooming in makes `radial` smaller, hence `invert`. + +**Recentering** + +```ts +const recentering = { enabled: true, wait: 1, time: 0.5 }; +body.horizontal.recentering = recentering; +body.vertical.recentering = recentering; +``` + + + + +```ts +import { Vector3 } from 'three'; +import { HardLookAtAimThree, OrbitFollowBodyThree } from '@kvvasuu/klipp/three'; + +const body = new OrbitFollowBodyThree(player, { radius: 8, targetOffset: new Vector3(0, 1.5, 0), damping: 0.3 }); +body.radial.damping = 0.15; +camera.body = body; +camera.aim = new HardLookAtAimThree(player); +``` + +Map the input as on the core. + + + + +```tsx +import { Aim, Body, InputController, VirtualCamera } from '@kvvasuu/klipp/react'; + +const orbit = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 }; + + + + + + + +``` + +`ref` gives you the `OrbitFollowBodyThree`. Removing an axis setting brings back its default without moving the axis. + +**Recentering** + +```tsx +const recentering = { enabled: true, wait: 1, time: 0.5 }; + + +``` + + + diff --git a/docs/body/position-composer.mdx b/docs/body/position-composer.mdx index 8fdb902..3ad127f 100644 --- a/docs/body/position-composer.mdx +++ b/docs/body/position-composer.mdx @@ -1,7 +1,7 @@ --- title: PositionComposer description: Moves the camera to keep a target at a spot on screen. -nav: 23 +nav: 24 --- Moves the camera, without rotating it, so the target stays at `screenPosition` and `cameraDistance` away. With a `deadZone` the target can move freely inside it before the camera reacts. diff --git a/docs/debugging/introduction.mdx b/docs/debugging/introduction.mdx index 861693b..b4163b9 100644 --- a/docs/debugging/introduction.mdx +++ b/docs/debugging/introduction.mdx @@ -1,6 +1,6 @@ --- title: Debugging -description: Visualize framing zones and camera frustums. +description: Visualize framing zones, camera frustums and orbits. nav: 80 --- @@ -25,6 +25,10 @@ Each element has a CSS class you can restyle: `klipp-debug-deadzone`, `klipp-deb A frustum helper draws a camera in the scene, so you can see where an inactive camera is and what it's looking at. Every camera's `state` holds what it needs: `position`, `quaternion`, `fov`, `near` and `far`. Off screen, a camera updates only now and then by default, so its frustum moves in steps. Give it [`standbyUpdate: 'always'`](/api/virtual-camera#standbyupdate) to see it move smoothly. +## Orbits + +An orbit helper draws where an [`OrbitFollow`](/body/orbit-follow) camera can move, around the point it tracks: the circle `horizontal` moves it along in orange, the arc `vertical` moves it along in blue, and the three rings of `'threeRing'` in gray. + ## Usage @@ -50,6 +54,10 @@ overlay.render(debugZones.composer(body.screenPosition, body.deadZone, body.hard `debugZones.composer` turns a composer's settings into the same boxes the React components draw. Call `render` again whenever the zones change, and `disconnect()` to remove the overlay. For group framing, `debugZones.groupFramingPaddingBox` gives the size of the padding boundary. +**Orbits** + +`orbitFollow.point(out, body.state, body, horizontal, vertical)` gives where the camera would be at any axis values, to draw with your own renderer. + @@ -83,6 +91,20 @@ scene.add(helper); helper.sync(securityCam.state, innerWidth / innerHeight); ``` +**Orbits** + +```ts +import { OrbitFollowHelperThree } from '@kvvasuu/klipp/three'; + +const helper = new OrbitFollowHelperThree(); +scene.add(helper); + +// every frame, after klipp.update +helper.sync(body); +``` + +`helper.colors` holds the `horizontal`, `vertical` and `rings` colors. + @@ -116,5 +138,13 @@ import { CameraFrustumHelper } from '@kvvasuu/klipp/react'; `ref` gives you the `THREE.CameraHelper`. +**Orbits** + +Add the `debug` prop: + +```tsx + +``` + diff --git a/docs/getting-started/building-on-the-core.mdx b/docs/getting-started/building-on-the-core.mdx index f9d08cb..af0a64c 100644 --- a/docs/getting-started/building-on-the-core.mdx +++ b/docs/getting-started/building-on-the-core.mdx @@ -48,7 +48,7 @@ class EngineFollow extends FollowBody { camera.body = new EngineFollow(player, { offset: [0, 3, 8] }); ``` -The same works for `HardLockToTargetBody`, `PositionComposerBody`, `HardLookAtAim`, `RotateWithFollowTargetAim`, `RotationComposerAim` and `PanTiltAim`. `GroupFramingExtension` reads its members through `readMembers`. +The same works for `HardLockToTargetBody`, `OrbitFollowBody`, `PositionComposerBody`, `HardLookAtAim`, `RotateWithFollowTargetAim`, `RotationComposerAim` and `PanTiltAim`. `GroupFramingExtension` reads its members through `readMembers`. diff --git a/docs/getting-started/core-concepts.mdx b/docs/getting-started/core-concepts.mdx index cf09fc3..f7f358c 100644 --- a/docs/getting-started/core-concepts.mdx +++ b/docs/getting-started/core-concepts.mdx @@ -18,7 +18,7 @@ Each camera is made of up to four kinds of pieces, which run in this order every | Piece | What it does | How many | Examples | | ----- | ------------ | -------- | -------- | -| [Body](/body/introduction) | Moves the camera | one | `Follow`, `PositionComposer` | +| [Body](/body/introduction) | Moves the camera | one | `Follow`, `OrbitFollow`, `PositionComposer` | | [Aim](/aim/introduction) | Rotates the camera | one | `HardLookAt`, `RotationComposer` | | [Extension](/extension/introduction) | Adjusts the finished shot | any | `GroupFraming`, `Lens` | | [Noise](/noise/introduction) | Adds shake on top | any | `BasicMultiChannelPerlin`, `ImpulseListener` | diff --git a/docs/input/introduction.mdx b/docs/input/introduction.mdx index 061d0c5..1135b3a 100644 --- a/docs/input/introduction.mdx +++ b/docs/input/introduction.mdx @@ -4,7 +4,7 @@ description: Mouse, touch, wheel and pinch input for cameras, or your own data. nav: 60 --- -Some pieces can be controlled by the user, like [`PanTilt`](/aim/pan-tilt). They expose **axes** (`pan`, `tilt`), and an [input controller](/input/input-controller) maps mouse and touch drags, the wheel and pinches onto those axes. +Some pieces can be controlled by the user, like [`PanTilt`](/aim/pan-tilt) or [`OrbitFollow`](/body/orbit-follow). They expose **axes** (`pan` and `tilt`, or `horizontal`, `vertical` and `radial`), and an [input controller](/input/input-controller) maps mouse and touch drags, the wheel and pinches onto those axes. Each axis is an [`InputAxis`](/input/input-axis), a value with limits, wrapping, damping and optional recentering. You can also drive an axis from your own code, for example in a cutscene, see [Input from data](/input/input-from-data). diff --git a/examples/src/index.css b/examples/src/index.css index b8b6552..c5f4ed2 100644 --- a/examples/src/index.css +++ b/examples/src/index.css @@ -361,6 +361,14 @@ body { text-align: center; } +.input-area { + position: absolute; + box-sizing: border-box; + border: 2px dashed #7ed957; + background: rgb(126 217 87 / 0.08); + pointer-events: none; +} + .pan-tilt-crosshair { position: absolute; top: 50%; diff --git a/examples/src/registry/examples.ts b/examples/src/registry/examples.ts index 682d8ef..6a18c72 100644 --- a/examples/src/registry/examples.ts +++ b/examples/src/registry/examples.ts @@ -13,6 +13,12 @@ import { BlendHints } from '../scenes/blending/BlendHints'; import { CustomBlends } from '../scenes/blending/CustomBlends'; import { Follow } from '../scenes/body/Follow'; import { HardLockToTarget } from '../scenes/body/HardLockToTarget'; +import { OrbitFollow } from '../scenes/body/OrbitFollow'; +import { OrbitFollowBindingMode } from '../scenes/body/OrbitFollowBindingMode'; +import { OrbitFollowDampedAim } from '../scenes/body/OrbitFollowDampedAim'; +import { OrbitFollowGroupFraming } from '../scenes/body/OrbitFollowGroupFraming'; +import { OrbitFollowRecentering } from '../scenes/body/OrbitFollowRecentering'; +import { OrbitFollowThreeRing } from '../scenes/body/OrbitFollowThreeRing'; import { PositionComposer } from '../scenes/body/PositionComposer'; import { PositionComposerDolly } from '../scenes/body/PositionComposerDolly'; import { PositionComposerLookahead } from '../scenes/body/PositionComposerLookahead'; @@ -20,6 +26,9 @@ import { GroupFraming } from '../scenes/extension/GroupFraming'; import { Lens } from '../scenes/extension/Lens'; import { Impulse } from '../scenes/impulse/Impulse'; import { InputFromData } from '../scenes/input/InputFromData'; +import { InputRawInput } from '../scenes/input/InputRawInput'; +import { InputTouchAndAreas } from '../scenes/input/InputTouchAndAreas'; +import { InputWheelAndPinch } from '../scenes/input/InputWheelAndPinch'; import { BasicMultiChannelPerlin } from '../scenes/noise/BasicMultiChannelPerlin'; import { Placeholder } from '../scenes/Placeholder'; import { StandbyUpdate } from '../scenes/virtual-camera/StandbyUpdate'; @@ -50,6 +59,72 @@ export const categories: ExampleCategory[] = [ spectatorTarget: [0, 3, 0], ready: true, }, + { + slug: 'orbit-follow', + title: 'OrbitFollow', + group: 'orbit-follow', + Scene: OrbitFollow, + description: + 'Drag to move the camera around the shape, scroll or pinch to zoom. The orange circle and blue arc show where dragging takes the camera. Turn on `lockPointer` and left-click to orbit with the mouse alone.', + spectatorPosition: [12, 10, 14], + spectatorTarget: [0, 1.5, 0], + ready: true, + }, + { + slug: 'orbit-follow-binding-mode', + title: 'OrbitFollow: Binding Mode', + group: 'orbit-follow', + Scene: OrbitFollowBindingMode, + description: + '`bindingMode` decides whether the orbit turns with the plane: with `lockToTargetWithWorldUp` the camera stays behind it, with `worldSpace` it keeps its heading. With `damping` the camera lags behind the plane, but dragging around the orbit is never delayed.', + spectatorPosition: [0, 14, 18], + spectatorTarget: [0, 3, 0], + ready: true, + }, + { + slug: 'orbit-follow-three-ring', + title: 'OrbitFollow: Three Rings', + group: 'orbit-follow', + Scene: OrbitFollowThreeRing, + description: + 'With `orbitStyle: threeRing` the camera moves on a surface through three rings instead of a sphere. Change the rings and `splineCurvature`, and drag up and down to follow the blue curve.', + spectatorPosition: [14, 10, 14], + spectatorTarget: [0, 2, 0], + ready: true, + }, + { + slug: 'orbit-follow-recentering', + title: 'OrbitFollow: Recentering', + group: 'orbit-follow', + Scene: OrbitFollowRecentering, + description: + 'Drag and let go. After `wait` seconds the camera eases back: behind the plane with `recenteringTarget: trackingTarget`, or to the axis center with `axisCenter`.', + spectatorPosition: [0, 14, 18], + spectatorTarget: [0, 3, 0], + ready: true, + }, + { + slug: 'orbit-follow-damped-aim', + title: 'OrbitFollow: Damped Aim', + group: 'orbit-follow', + Scene: OrbitFollowDampedAim, + description: + "The camera lags behind the plane with `damping`, and a `RotationComposer` with `aimDamping` turns toward it slowly, so the plane drifts on screen. Dragging around the orbit still keeps it in place: turns made by the Body skip the Aim's damping.", + spectatorPosition: [0, 14, 18], + spectatorTarget: [0, 3, 0], + ready: true, + }, + { + slug: 'orbit-follow-group-framing', + title: 'OrbitFollow: Group Framing', + group: 'orbit-follow', + Scene: OrbitFollowGroupFraming, + description: + 'Orbit around a group of balls while `GroupFraming` moves the camera in and out along the view, so every ball stays in the frame from any side. With `fitMode: ceiling` it only ever moves out from the orbit, with `rigid` it also moves in.', + spectatorPosition: [0, 40, 50], + spectatorTarget: [0, 0, 0], + ready: true, + }, { slug: 'position-composer', title: 'PositionComposer', @@ -197,11 +272,41 @@ export const categories: ExampleCategory[] = [ title: 'Input from data', Scene: InputFromData, description: - 'One camera, three sources of input. Pick a `source` and only its settings show up. With the mouse you can record what you do, `scripted` lets code look around with `applyDelta`, and `replay` plays the recording back without any mouse.', + 'One camera, three sources of input. Pick a `source` and only its settings show up. With the mouse you can record what you do, `scripted` lets code orbit with `applyDelta`, and `replay` plays the recording back without any mouse.', spectatorPosition: [8, 5, 8], spectatorTarget: [0, 2, 0], ready: true, }, + { + slug: 'input-wheel-and-pinch', + title: 'Wheel and Pinch', + Scene: InputWheelAndPinch, + description: + 'Scroll or pinch to zoom. The wheel moves in pixels and needs its own `gain`, while a pinch on a trackpad or a touch screen zooms exactly as much as the fingers spread. The zoom stops at `closest` and `farthest`.', + spectatorPosition: [12, 10, 14], + spectatorTarget: [0, 1.5, 0], + ready: true, + }, + { + slug: 'input-touch-and-areas', + title: 'Touch and Areas', + Scene: InputTouchAndAreas, + description: + 'Input only starts inside the green `area`, so the rest of the page stays usable. Pinch to zoom and twist to turn the box: with `lockTouchAxis` a two-finger gesture does one or the other, never both, which is handy when twisting is handled by hand from `input`. Turn off `suppressContextMenu` to get the browser menu back on right-click.', + spectatorPosition: [12, 10, 14], + spectatorTarget: [0, 1.5, 0], + ready: true, + }, + { + slug: 'input-raw-input', + title: 'Raw Input', + Scene: InputRawInput, + description: + 'Everything the controller read this frame, as plain numbers in `input`. Use it for gestures no axis maps: here a right-drag spins the shape.', + spectatorPosition: [12, 10, 14], + spectatorTarget: [0, 1.5, 0], + ready: true, + }, ], }, { diff --git a/examples/src/scene/OrbitingGroup.tsx b/examples/src/scene/OrbitingGroup.tsx new file mode 100644 index 0000000..dd2d9d6 --- /dev/null +++ b/examples/src/scene/OrbitingGroup.tsx @@ -0,0 +1,43 @@ +import { useFrame } from '@react-three/fiber'; +import type { RefObject } from 'react'; +import type { Group } from 'three'; + +import { memberOrbits, memberRadius, type GroupMember } from './groupMembers'; + +/** Balls circling the origin at different radii and speeds, with `anchorRef` kept at their average position. */ +export function OrbitingGroup({ members, anchorRef }: { members: GroupMember[]; anchorRef: RefObject }) { + useFrame(({ clock }) => { + const t = clock.elapsedTime; + let sumX = 0; + let sumY = 0; + let sumZ = 0; + let resolved = 0; + + memberOrbits.forEach((orbit, i) => { + const mesh = members[i].target.current; + if (!mesh) return; + const angle = t * orbit.speed + orbit.phase; + mesh.position.set(Math.cos(angle) * orbit.radius, orbit.height, Math.sin(angle) * orbit.radius); + sumX += mesh.position.x; + sumY += mesh.position.y; + sumZ += mesh.position.z; + resolved++; + }); + + // plain mean, matching `positionMode: 'groupAverage'`, so Aim looks at the point GroupFraming frames + const anchor = anchorRef.current; + if (anchor && resolved > 0) anchor.position.set(sumX / resolved, sumY / resolved, sumZ / resolved); + }); + + return ( + <> + {memberOrbits.map((orbit, i) => ( + + + + + ))} + + + ); +} diff --git a/examples/src/scene/clutterLayouts.ts b/examples/src/scene/clutterLayouts.ts index dee886c..1a60375 100644 --- a/examples/src/scene/clutterLayouts.ts +++ b/examples/src/scene/clutterLayouts.ts @@ -132,6 +132,23 @@ export const clutterLayouts = { { x: 3.5, z: -9, width: 1.2, height: 1.6, depth: 1.2 }, { x: 4.5, z: -15, width: 1.4, height: 1.8, depth: 1.4, color: '#c7c7cf' }, ], + // Only between and beyond the orbits of OrbitingGroup, which pass at radii 4, 6.5, 9 and 18. + groupFraming: [ + { x: 12.9, z: 4, width: 1.4, height: 0.3, depth: 1.4 }, + { x: 6.3, z: 11.9, width: 1.2, height: 0.2, depth: 1.2, color: '#9a9aa8' }, + { x: -4, z: 12.9, width: 1.6, height: 0.4, depth: 1.6, color: '#c7c7cf' }, + { x: -11.9, z: 6.3, width: 1.3, height: 0.25, depth: 1.3 }, + { x: -12.9, z: -4, width: 1.5, height: 0.35, depth: 1.5, color: '#9a9aa8' }, + { x: -6.3, z: -11.9, width: 1.2, height: 0.2, depth: 1.2 }, + { x: 4, z: -12.9, width: 1.6, height: 0.3, depth: 1.6, color: '#c7c7cf' }, + { x: 11.9, z: -6.3, width: 1.3, height: 0.45, depth: 1.3 }, + { x: 16, z: 16.5, width: 2, height: 0.5, depth: 2, color: '#9a9aa8' }, + { x: -6.3, z: 22.1, width: 1.8, height: 0.35, depth: 1.8 }, + { x: -22.3, z: 5.6, width: 2.2, height: 0.6, depth: 2.2, color: '#c7c7cf' }, + { x: -16, z: -16.5, width: 1.8, height: 0.4, depth: 1.8 }, + { x: 6.3, z: -22.1, width: 2, height: 0.3, depth: 2, color: '#9a9aa8' }, + { x: 22.3, z: -5.6, width: 1.9, height: 0.5, depth: 1.9 }, + ], } satisfies Record; export type ClutterLayout = keyof typeof clutterLayouts; diff --git a/examples/src/scene/groupMembers.ts b/examples/src/scene/groupMembers.ts new file mode 100644 index 0000000..2e48efb --- /dev/null +++ b/examples/src/scene/groupMembers.ts @@ -0,0 +1,17 @@ +import { createRef, type RefObject } from 'react'; +import type { Mesh } from 'three'; + +export const memberRadius = 1; + +export const memberOrbits = [ + { radius: 4, speed: 0.3, phase: 0, height: 0, color: '#21a9e0' }, + { radius: 9, speed: 0.45, phase: 1.3, height: 1.2, color: '#ff6b4a' }, + { radius: 6.5, speed: -0.35, phase: 2.6, height: -0.8, color: '#7ed957' }, + { radius: 18, speed: 0.22, phase: 4.2, height: 0.6, color: '#ffd23f' }, +] as const; + +export type GroupMember = { target: RefObject; radius: number }; + +/** One member per orbit of `OrbitingGroup`. */ +export const createGroupMembers = (): GroupMember[] => + memberOrbits.map(() => ({ target: createRef(), radius: memberRadius })); diff --git a/examples/src/scenes/body/Follow.tsx b/examples/src/scenes/body/Follow.tsx index 1c70685..71b4d8d 100644 --- a/examples/src/scenes/body/Follow.tsx +++ b/examples/src/scenes/body/Follow.tsx @@ -11,9 +11,10 @@ import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; export function Follow() { const planeRef = useRef(null); - const { offset, damping, bindingMode } = useControls('Follow', { + const { offset, damping, rotationDamping, bindingMode } = useControls('Follow', { offset: { x: 0, y: 0.5, z: 5 }, damping: { value: 0, min: 0, max: 2, step: 0.05 }, + rotationDamping: { value: 0, min: 0, max: 2, step: 0.05 }, bindingMode: { value: BindingModes.lockToTarget as BindingMode, options: Object.values(BindingModes) }, }); @@ -28,6 +29,7 @@ export function Follow() { target={planeRef} offset={[offset.x, offset.y, offset.z]} damping={damping} + rotationDamping={rotationDamping} bindingMode={bindingMode} /> diff --git a/examples/src/scenes/body/OrbitFollow.tsx b/examples/src/scenes/body/OrbitFollow.tsx new file mode 100644 index 0000000..12e06aa --- /dev/null +++ b/examples/src/scenes/body/OrbitFollow.tsx @@ -0,0 +1,76 @@ +import type { InputControllerDom } from '@kvvasuu/klipp/dom'; +import { Aim, Body, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import type { OrbitFollowBodyThree } from '@kvvasuu/klipp/three'; +import { useFrame } from '@react-three/fiber'; +import { useControls } from 'leva'; +import { useRef } from 'react'; +import type { Mesh } from 'three'; + +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { Crosshair } from '../../scene/Crosshair'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; +import { SpinningSubject } from '../../scene/SpinningSubject'; +import { usePointerLock } from '../../scene/usePointerLock'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +export function OrbitFollow() { + const subjectRef = useRef(null); + const bodyRef = useRef(null); + const controllerRef = useRef(null); + const valuesRef = useRef(null); + + const { radius, axisDamping, zoomDamping, autoNormalize, debug, lockPointer } = useControls('OrbitFollow', { + radius: { value: 6, min: 1, max: 20, step: 0.5 }, + axisDamping: { value: 0.1, min: 0, max: 1, step: 0.05 }, + zoomDamping: { value: 0.15, min: 0, max: 1, step: 0.05 }, + autoNormalize: true, + debug: true, + lockPointer: false, + }); + + const locked = usePointerLock(controllerRef, lockPointer); + + useFrame(() => { + const body = bodyRef.current; + if (!valuesRef.current || !body) return; + const { horizontal, vertical, radial } = body; + valuesRef.current.textContent = + `horizontal: ${horizontal.value.toFixed(1)}° vertical: ${vertical.value.toFixed(1)}° ` + + `zoom: ${Math.exp(radial.value).toFixed(2)}`; + }); + + return ( + <> + + + + + + + + + + + + + + + {locked && } +
+ {lockPointer ? 'left-click: lock cursor\nmove: orbit\nwheel: zoom' : orbitHint} +
+
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitFollowBindingMode.tsx b/examples/src/scenes/body/OrbitFollowBindingMode.tsx new file mode 100644 index 0000000..f15a8ff --- /dev/null +++ b/examples/src/scenes/body/OrbitFollowBindingMode.tsx @@ -0,0 +1,53 @@ +import { BindingModes, type BindingMode } from '@kvvasuu/klipp'; +import { Aim, Body, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import { useControls } from 'leva'; +import { useRef } from 'react'; +import type { Group } from 'three'; + +import { Airplane } from '../../scene/Airplane'; +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +export function OrbitFollowBindingMode() { + const planeRef = useRef(null); + + const { bindingMode, damping, rotationDamping, debug } = useControls('OrbitFollow: Binding Mode', { + bindingMode: { value: BindingModes.lockToTargetWithWorldUp as BindingMode, options: Object.values(BindingModes) }, + damping: { value: 0.3, min: 0, max: 2, step: 0.05 }, + rotationDamping: { value: 0, min: 0, max: 2, step: 0.05 }, + debug: true, + }); + + return ( + <> + + + + + + + + + + + + + + +
{orbitHint}
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitFollowDampedAim.tsx b/examples/src/scenes/body/OrbitFollowDampedAim.tsx new file mode 100644 index 0000000..5345089 --- /dev/null +++ b/examples/src/scenes/body/OrbitFollowDampedAim.tsx @@ -0,0 +1,50 @@ +import { BindingModes } from '@kvvasuu/klipp'; +import { Aim, Body, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import { useControls } from 'leva'; +import { useRef } from 'react'; +import type { Group } from 'three'; + +import { Airplane } from '../../scene/Airplane'; +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +export function OrbitFollowDampedAim() { + const planeRef = useRef(null); + + const { damping, aimDamping, debug } = useControls('OrbitFollow: Damped Aim', { + damping: { value: 1, min: 0, max: 2, step: 0.05 }, + aimDamping: { value: 0.5, min: 0, max: 2, step: 0.05 }, + debug: true, + }); + + return ( + <> + + + + + + + + + + + + + + +
{orbitHint}
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitFollowGroupFraming.tsx b/examples/src/scenes/body/OrbitFollowGroupFraming.tsx new file mode 100644 index 0000000..8cc13c7 --- /dev/null +++ b/examples/src/scenes/body/OrbitFollowGroupFraming.tsx @@ -0,0 +1,62 @@ +import { Aim, Body, Extension, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import type { GroupFramingFitMode } from '@kvvasuu/klipp/three'; +import { useControls } from 'leva'; +import { useRef, useState } from 'react'; +import type { Group } from 'three'; + +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { createGroupMembers } from '../../scene/groupMembers'; +import { OrbitingGroup } from '../../scene/OrbitingGroup'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +export function OrbitFollowGroupFraming() { + const [members] = useState(createGroupMembers); + const anchorRef = useRef(null); + + const { fitMode, padding, framingDamping, debug } = useControls('OrbitFollow: Group Framing', { + fitMode: { value: 'rigid' as GroupFramingFitMode, options: ['ceiling', 'rigid'] as GroupFramingFitMode[] }, + padding: { value: 1.5, min: 0, max: 10, step: 0.1 }, + framingDamping: { value: 0.1, min: 0, max: 3, step: 0.05 }, + debug: true, + }); + + return ( + <> + + + + + + + + + + + + + + + + + +
{orbitHint}
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitFollowRecentering.tsx b/examples/src/scenes/body/OrbitFollowRecentering.tsx new file mode 100644 index 0000000..bb1d3dd --- /dev/null +++ b/examples/src/scenes/body/OrbitFollowRecentering.tsx @@ -0,0 +1,54 @@ +import type { RecenteringTarget } from '@kvvasuu/klipp'; +import { Aim, Body, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import { useControls } from 'leva'; +import { useRef } from 'react'; +import type { Group } from 'three'; + +import { Airplane } from '../../scene/Airplane'; +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +export function OrbitFollowRecentering() { + const planeRef = useRef(null); + + const { recenteringTarget, wait, time } = useControls('OrbitFollow: Recentering', { + recenteringTarget: { + value: 'trackingTarget' as RecenteringTarget, + options: ['trackingTarget', 'axisCenter'] as RecenteringTarget[], + }, + wait: { value: 0.3, min: 0, max: 5, step: 0.1 }, + time: { value: 0.3, min: 0.1, max: 3, step: 0.1 }, + }); + const recentering = { enabled: true, wait, time }; + + return ( + <> + + + + + + + + + + + + + + +
{`${orbitHint}\nlet go and wait: the camera eases back`}
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitFollowThreeRing.tsx b/examples/src/scenes/body/OrbitFollowThreeRing.tsx new file mode 100644 index 0000000..460f192 --- /dev/null +++ b/examples/src/scenes/body/OrbitFollowThreeRing.tsx @@ -0,0 +1,61 @@ +import { Aim, Body, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import { useControls } from 'leva'; +import { useRef } from 'react'; +import type { Mesh } from 'three'; + +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; +import { SpinningSubject } from '../../scene/SpinningSubject'; + +import { OrbitInput, orbitHint } from './OrbitInput'; + +const height = (value: number) => ({ value, min: -5, max: 10, step: 0.25 }); +const radius = (value: number) => ({ value, min: 0.5, max: 12, step: 0.25 }); + +export function OrbitFollowThreeRing() { + const subjectRef = useRef(null); + + const settings = useControls('OrbitFollow: Three Rings', { + topHeight: height(6), + topRadius: radius(3), + centerHeight: height(2), + centerRadius: radius(7), + bottomHeight: height(0), + bottomRadius: radius(4), + splineCurvature: { value: 0.5, min: 0, max: 1, step: 0.05 }, + }); + + return ( + <> + + + + + + + + + + + + + + +
{orbitHint}
+ + + ); +} diff --git a/examples/src/scenes/body/OrbitInput.tsx b/examples/src/scenes/body/OrbitInput.tsx new file mode 100644 index 0000000..015ac01 --- /dev/null +++ b/examples/src/scenes/body/OrbitInput.tsx @@ -0,0 +1,20 @@ +import type { InputControllerDom } from '@kvvasuu/klipp/dom'; +import { InputController } from '@kvvasuu/klipp/react'; +import type { Ref } from 'react'; + +const orbitSource = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 }; + +/** Drag to orbit, scroll or pinch to zoom: the input every OrbitFollow scene shares. */ +export function OrbitInput({ ref }: { ref?: Ref }) { + return ( + + ); +} + +export const orbitHint = 'drag: orbit\nwheel or pinch: zoom'; diff --git a/examples/src/scenes/extension/GroupFraming.tsx b/examples/src/scenes/extension/GroupFraming.tsx index e352be5..a016940 100644 --- a/examples/src/scenes/extension/GroupFraming.tsx +++ b/examples/src/scenes/extension/GroupFraming.tsx @@ -1,64 +1,15 @@ import { Aim, Body, Extension, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; import type { GroupFramingFitMode, GroupFramingMode } from '@kvvasuu/klipp/three'; -import { useFrame } from '@react-three/fiber'; import { useControls } from 'leva'; -import { createRef, useRef, useState, type RefObject } from 'react'; -import { Group, Mesh } from 'three'; +import { useRef, useState } from 'react'; +import type { Group } from 'three'; +import { createGroupMembers } from '../../scene/groupMembers'; +import { OrbitingGroup } from '../../scene/OrbitingGroup'; import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; -const memberRadius = 1; - -const memberOrbits = [ - { radius: 4, speed: 0.3, phase: 0, height: 0, color: '#21a9e0' }, - { radius: 9, speed: 0.45, phase: 1.3, height: 1.2, color: '#ff6b4a' }, - { radius: 6.5, speed: -0.35, phase: 2.6, height: -0.8, color: '#7ed957' }, - { radius: 18, speed: 0.22, phase: 4.2, height: 0.6, color: '#ffd23f' }, -] as const; - -type Member = { target: RefObject; radius: number }; - -function OrbitingGroup({ members, anchorRef }: { members: Member[]; anchorRef: RefObject }) { - useFrame(({ clock }) => { - const t = clock.elapsedTime; - let sumX = 0; - let sumY = 0; - let sumZ = 0; - let resolved = 0; - - memberOrbits.forEach((orbit, i) => { - const mesh = members[i].target.current; - if (!mesh) return; - const angle = t * orbit.speed + orbit.phase; - mesh.position.set(Math.cos(angle) * orbit.radius, orbit.height, Math.sin(angle) * orbit.radius); - sumX += mesh.position.x; - sumY += mesh.position.y; - sumZ += mesh.position.z; - resolved++; - }); - - // plain mean, matching `positionMode: 'groupAverage'`, so Aim looks at the point GroupFraming frames - const anchor = anchorRef.current; - if (anchor && resolved > 0) anchor.position.set(sumX / resolved, sumY / resolved, sumZ / resolved); - }); - - return ( - <> - {memberOrbits.map((orbit, i) => ( - - - - - ))} - - - ); -} - export function GroupFraming() { - const [members] = useState(() => - memberOrbits.map(() => ({ target: createRef(), radius: memberRadius })), - ); + const [members] = useState(createGroupMembers); const anchorRef = useRef(null); const { padding, damping, screenPositionX, screenPositionY, fitMode, minDistance, maxDistance, framingMode, debug } = diff --git a/examples/src/scenes/input/InputFromData.tsx b/examples/src/scenes/input/InputFromData.tsx index e153323..10edde8 100644 --- a/examples/src/scenes/input/InputFromData.tsx +++ b/examples/src/scenes/input/InputFromData.tsx @@ -1,16 +1,18 @@ import { InputController as InputReplay, type ConsumedInput, type InputControllerConfig } from '@kvvasuu/klipp'; import type { InputControllerDom } from '@kvvasuu/klipp/dom'; -import { Aim, InputController, Klipp, VirtualCamera, useKlipp } from '@kvvasuu/klipp/react'; -import type { PanTiltAimThree } from '@kvvasuu/klipp/three'; +import { Aim, Body, InputController, Klipp, VirtualCamera, useKlipp } from '@kvvasuu/klipp/react'; +import type { OrbitFollowBodyThree } from '@kvvasuu/klipp/three'; import { useFrame } from '@react-three/fiber'; import { button, folder, useControls } from 'leva'; import { useEffect, useRef, useState, type RefObject } from 'react'; +import type { Mesh } from 'three'; import { CanvasOverlay } from '../../scene/CanvasOverlay'; import { GroundClutter } from '../../scene/GroundClutter'; import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; +import { SpinningSubject } from '../../scene/SpinningSubject'; -const lookSource = { axes: { x: 'pan', y: 'tilt' }, gain: 0.15 }; +const orbitSource = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 }; type Source = 'mouse' | 'scripted' | 'replay'; @@ -27,18 +29,18 @@ type Recording = { frames: ConsumedInput[]; config: InputControllerConfig | null function DataDriver({ source, recording, - panSpeed, - tiltSpeed, + horizontalSpeed, + verticalSpeed, loop, - aim, + body, controller, }: { source: Source; recording: boolean; - panSpeed: number; - tiltSpeed: number; + horizontalSpeed: number; + verticalSpeed: number; loop: boolean; - aim: RefObject; + body: RefObject; controller: RefObject; }) { const klipp = useKlipp(); @@ -69,8 +71,8 @@ function DataDriver({ let time = 0; return klipp.registerUpdate((dt) => { time += dt; - aim.current?.pan.applyDelta(Math.cos(time * 0.6) * panSpeed * dt); - aim.current?.tilt.applyDelta(Math.cos(time * 1.3) * tiltSpeed * dt); + body.current?.horizontal.applyDelta(Math.cos(time * 0.6) * horizontalSpeed * dt); + body.current?.vertical.applyDelta(Math.cos(time * 1.3) * verticalSpeed * dt); return true; }); } @@ -97,12 +99,14 @@ function DataDriver({ stop(); release(); }; - }, [klipp, source, recording, panSpeed, tiltSpeed, loop, aim, controller]); + }, [klipp, source, recording, horizontalSpeed, verticalSpeed, loop, body, controller]); useFrame(() => { - if (!liveRef.current || !aim.current) return; - const { pan, tilt } = aim.current; - const angles = `pan ${pan.value.toFixed(1)}° tilt ${tilt.value.toFixed(1)}°`; + if (!liveRef.current || !body.current) return; + const { horizontal, vertical, radial } = body.current; + const angles = + `horizontal ${horizontal.value.toFixed(1)}° vertical ${vertical.value.toFixed(1)}° ` + + `zoom ${Math.exp(radial.value).toFixed(2)}`; const frames = tape.current.frames.length; const progress = source === 'replay' @@ -120,10 +124,10 @@ function DataDriver({ const hint = source === 'mouse' ? recording - ? 'drag to look around, every frame is being recorded' - : 'drag to look around, turn on recording to capture it' + ? 'drag to orbit and scroll to zoom, every frame is being recorded' + : 'drag to orbit and scroll to zoom, turn on recording to capture it' : source === 'scripted' - ? 'code looks around on its own' + ? 'code orbits on its own' : recordedFrames > 0 ? 'replaying the recording, no mouse involved' : 'record something with the mouse first'; @@ -139,51 +143,67 @@ function DataDriver({ } export function InputFromData() { - const aimRef = useRef(null); + const subjectRef = useRef(null); + const bodyRef = useRef(null); const controllerRef = useRef(null); - const [faceForward, setFaceForward] = useState(0); + const [resets, setResets] = useState(0); const controls = useControls('Input from data', { source: { value: 'mouse', options: sourceOptions }, Mouse: folder({ recording: false }, { render: shownFor('mouse') }), Scripted: folder( { - panSpeed: { value: 40, min: 0, max: 120, step: 5, label: 'pan °/s' }, - tiltSpeed: { value: 10, min: 0, max: 60, step: 5, label: 'tilt °/s' }, + horizontalSpeed: { value: 40, min: 0, max: 120, step: 5, label: 'horizontal °/s' }, + verticalSpeed: { value: 20, min: 0, max: 60, step: 5, label: 'vertical °/s' }, }, { render: shownFor('scripted') }, ), Replay: folder({ loop: true }, { render: shownFor('replay') }), }); - useControls('Camera', { 'face forward': button(() => setFaceForward((count) => count + 1)) }); + useControls('Camera', { 'reset view': button(() => setResets((count) => count + 1)) }); const source = controls.source as Source; useEffect(() => { - if (faceForward === 0) return; - aimRef.current?.pan.setValue(0); - aimRef.current?.tilt.setValue(0); - }, [faceForward]); + if (resets === 0) return; + bodyRef.current?.horizontal.setValue(0); + bodyRef.current?.vertical.setValue(20); + bodyRef.current?.radial.setValue(0); + }, [resets]); return ( <> - + + - - + + {source === 'mouse' && ( - + )} - + + diff --git a/examples/src/scenes/input/InputRawInput.tsx b/examples/src/scenes/input/InputRawInput.tsx new file mode 100644 index 0000000..2fabef5 --- /dev/null +++ b/examples/src/scenes/input/InputRawInput.tsx @@ -0,0 +1,93 @@ +import type { ConsumedInput } from '@kvvasuu/klipp'; +import type { InputControllerDom } from '@kvvasuu/klipp/dom'; +import { Aim, Body, InputController, Klipp, VirtualCamera } from '@kvvasuu/klipp/react'; +import { useFrame } from '@react-three/fiber'; +import { useRef } from 'react'; +import type { Mesh } from 'three'; + +import { CanvasOverlay } from '../../scene/CanvasOverlay'; +import { GroundClutter } from '../../scene/GroundClutter'; +import { SpectatorFrustum } from '../../scene/SpectatorFrustum'; +import { SpinningSubject } from '../../scene/SpinningSubject'; + +const orbitSource = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 }; +const spinPerPixel = 0.01; + +const pairs: [string, keyof ConsumedInput, keyof ConsumedInput][] = [ + ['left', 'leftDx', 'leftDy'], + ['middle', 'middleDx', 'middleDy'], + ['right', 'rightDx', 'rightDy'], + ['one finger', 'touchOneDx', 'touchOneDy'], + ['two fingers', 'touchTwoDx', 'touchTwoDy'], + ['three fingers', 'touchThreeDx', 'touchThreeDy'], + ['wheel', 'wheelDeltaX', 'wheelDeltaY'], + ['locked', 'lockedDx', 'lockedDy'], +]; +const held: [string, keyof ConsumedInput][] = [ + ['left', 'leftHeld'], + ['middle', 'middleHeld'], + ['right', 'rightHeld'], + ['1 finger', 'touchOneHeld'], + ['2', 'touchTwoHeld'], + ['3', 'touchThreeHeld'], +]; + +const format = (value: number) => (value === 0 ? '·' : value.toFixed(2)); + +export function InputRawInput() { + const subjectRef = useRef(null); + const controllerRef = useRef(null); + const hudRef = useRef(null); + + useFrame(() => { + const input = controllerRef.current?.input; + if (!input) return; + + // Right-drag is not mapped to any axis, so the scene spins the shape with it by hand. + if (subjectRef.current) subjectRef.current.rotation.z += input.rightDx * spinPerPixel; + + if (!hudRef.current) return; + const lines = pairs.map( + ([name, x, y]) => + `${name.padEnd(14)}${format(input[x] as number).padStart(9)}${format(input[y] as number).padStart(9)}`, + ); + lines.push(`pinch ${format(input.pinchDelta)} twist ${format(input.touchRotateDelta)}`); + lines.push( + `held: ${ + held + .filter(([, key]) => input[key]) + .map(([name]) => name) + .join(', ') || '-' + }`, + ); + hudRef.current.textContent = lines.join('\n'); + }); + + return ( + <> + + + + + + + + + + + + + + + 
+      
+    
+  );
+}
diff --git a/examples/src/scenes/input/InputTouchAndAreas.tsx b/examples/src/scenes/input/InputTouchAndAreas.tsx
new file mode 100644
index 0000000..c751c60
--- /dev/null
+++ b/examples/src/scenes/input/InputTouchAndAreas.tsx
@@ -0,0 +1,85 @@
+import type { InputControllerDom, InteractiveArea } from '@kvvasuu/klipp/dom';
+import { Aim, Body, InputController, Klipp, VirtualCamera } from '@kvvasuu/klipp/react';
+import { useFrame } from '@react-three/fiber';
+import { useControls } from 'leva';
+import { useRef } from 'react';
+import type { Mesh } from 'three';
+
+import { CanvasOverlay } from '../../scene/CanvasOverlay';
+import { GroundClutter } from '../../scene/GroundClutter';
+import { SpectatorFrustum } from '../../scene/SpectatorFrustum';
+
+const orbitSource = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 };
+
+const areas: Record = {
+  'whole canvas': null,
+  'right half': { x: 0.5, y: 0, width: 0.5, height: 1 },
+  'bottom half': { x: 0, y: 0.5, width: 1, height: 0.5 },
+};
+
+export function InputTouchAndAreas() {
+  const subjectRef = useRef(null);
+  const controllerRef = useRef(null);
+
+  const { area, lockTouchAxis, suppressContextMenu } = useControls('Touch and Areas', {
+    area: { value: 'right half', options: Object.keys(areas) },
+    lockTouchAxis: true,
+    suppressContextMenu: true,
+  });
+  const interactiveArea = areas[area];
+
+  useFrame(() => {
+    const input = controllerRef.current?.input;
+    if (input && subjectRef.current) subjectRef.current.rotation.y -= input.touchRotateDelta;
+  });
+
+  return (
+    <>
+      
+      
+        
+        
+      
+
+      
+        
+          
+            
+          
+          
+          
+        
+      
+
+      
+        {interactiveArea && (
+          

+        )}
+        

+          {'one finger or a mouse button: orbit\ntwo fingers: pinch to zoom, twist to turn the box'}
+        

+      
+    
+  );
+}
diff --git a/examples/src/scenes/input/InputWheelAndPinch.tsx b/examples/src/scenes/input/InputWheelAndPinch.tsx
new file mode 100644
index 0000000..dd8476b
--- /dev/null
+++ b/examples/src/scenes/input/InputWheelAndPinch.tsx
@@ -0,0 +1,94 @@
+import type { InputControllerDom } from '@kvvasuu/klipp/dom';
+import { Aim, Body, InputController, Klipp, VirtualCamera } from '@kvvasuu/klipp/react';
+import type { OrbitFollowBodyThree } from '@kvvasuu/klipp/three';
+import { useFrame, useThree } from '@react-three/fiber';
+import { useControls } from 'leva';
+import { useEffect, useRef } from 'react';
+import type { Mesh } from 'three';
+
+import { CanvasOverlay } from '../../scene/CanvasOverlay';
+import { GroundClutter } from '../../scene/GroundClutter';
+import { SpectatorFrustum } from '../../scene/SpectatorFrustum';
+import { SpinningSubject } from '../../scene/SpinningSubject';
+
+const orbitSource = { axes: { x: 'horizontal', y: 'vertical' }, gain: 0.3 };
+const deltaModes = ['pixels', 'lines', 'pages'];
+
+export function InputWheelAndPinch() {
+  const subjectRef = useRef(null);
+  const bodyRef = useRef(null);
+  const controllerRef = useRef(null);
+  const valuesRef = useRef(null);
+  const lastWheel = useRef('-');
+  const domElement = useThree((state) => state.gl.domElement);
+
+  const settings = useControls('Wheel and Pinch', {
+    wheelGain: { value: 0.001, min: 0.0001, max: 0.005, step: 0.0001 },
+    wheelInvert: true,
+    pixelsPerLine: { value: 33, min: 1, max: 120, step: 1 },
+    pinchGain: { value: 1, min: 0.1, max: 3, step: 0.1 },
+    pinchInvert: true,
+    zoomDamping: { value: 0.15, min: 0, max: 1, step: 0.05 },
+    closest: { value: 0.5, min: 0.1, max: 1, step: 0.05, label: 'closest zoom' },
+    farthest: { value: 2, min: 1, max: 5, step: 0.1, label: 'farthest zoom' },
+  });
+
+  useEffect(() => {
+    const wheel = controllerRef.current?.inputSystem.wheel;
+    if (wheel) wheel.pixelsPerLine = settings.pixelsPerLine;
+  });
+
+  useEffect(() => {
+    const onWheel = (event: WheelEvent) => {
+      const pinch = event.ctrlKey ? ', ctrl: a trackpad pinch' : '';
+      lastWheel.current = `${event.deltaY.toFixed(1)} ${deltaModes[event.deltaMode]}${pinch}`;
+    };
+    domElement.addEventListener('wheel', onWheel);
+    return () => domElement.removeEventListener('wheel', onWheel);
+  }, [domElement]);
+
+  useFrame(() => {
+    const body = bodyRef.current;
+    if (!valuesRef.current || !body) return;
+    valuesRef.current.textContent = `zoom ${Math.exp(body.radial.value).toFixed(2)}  ·  last wheel ${lastWheel.current}`;
+  });
+
+  return (
+    <>
+      
+      
+
+      
+        
+          
+            
+          
+          
+          
+        
+      
+
+      
+        

+          {'scroll, pinch on a trackpad or with two fingers: zoom'}
+          

+        

+      
+    
+  );
+}
diff --git a/src/core/CameraState.ts b/src/core/CameraState.ts
index ff034c7..d478bdf 100644
--- a/src/core/CameraState.ts
+++ b/src/core/CameraState.ts
@@ -17,6 +17,8 @@ export type CameraState = {
   hasLookAtTarget: boolean;
   /** Up direction used by look-at rotation. */
   referenceUp: Vec3;
+  /** World rotation the Body turned the camera by this frame, which damped Aims follow without damping. */
+  rotationDampingBypass: Quat;
 };
 
 /** Create a camera state. */
@@ -33,6 +35,7 @@ export function create(): CameraState {
     lookAtTarget: [0, 0, 0],
     hasLookAtTarget: false,
     referenceUp: [0, 1, 0],
+    rotationDampingBypass: [0, 0, 0, 1],
   };
 }
 
@@ -50,6 +53,7 @@ export function copy(out: CameraState, source: CameraState): CameraState {
   vec3.copy(out.lookAtTarget, source.lookAtTarget);
   out.hasLookAtTarget = source.hasLookAtTarget;
   vec3.copy(out.referenceUp, source.referenceUp);
+  vec4.copy(out.rotationDampingBypass, source.rotationDampingBypass);
   return out;
 }
 
@@ -69,6 +73,7 @@ export function merge(out: CameraState, partial: Partial): CameraSt
   if (partial.lookAtTarget) vec3.copy(out.lookAtTarget, partial.lookAtTarget);
   if (partial.hasLookAtTarget !== undefined) out.hasLookAtTarget = partial.hasLookAtTarget;
   if (partial.referenceUp) vec3.copy(out.referenceUp, partial.referenceUp);
+  if (partial.rotationDampingBypass) vec4.copy(out.rotationDampingBypass, partial.rotationDampingBypass);
   return out;
 }
 
diff --git a/src/core/VirtualCamera.ts b/src/core/VirtualCamera.ts
index b450550..e40050d 100644
--- a/src/core/VirtualCamera.ts
+++ b/src/core/VirtualCamera.ts
@@ -1,4 +1,4 @@
-import type { Quat, Vec3 } from 'math';
+import { quat, type Quat, type Vec3 } from 'math';
 
 import * as cameraState from './CameraState';
 import type { CameraState } from './CameraState';
@@ -342,6 +342,7 @@ export class VirtualCamera extends EventDispatcher imp
   update = (out: CameraState, dt: number, justActivated: boolean): boolean => {
     // Keep `=== true` semantics: some pieces return a real boolean even when typed as void.
     let stillInFlight = false;
+    quat.identity(out.rotationDampingBypass);
     if (this._body?.update(out, dt, justActivated) === true) stillInFlight = true;
     if (this._aim?.update(out, dt, justActivated) === true) stillInFlight = true;
     for (const extension of this.extensions) {
diff --git a/src/core/aim/hardLookAt.ts b/src/core/aim/hardLookAt.ts
index 5da7cd3..cb60a14 100644
--- a/src/core/aim/hardLookAt.ts
+++ b/src/core/aim/hardLookAt.ts
@@ -1,13 +1,12 @@
-import { mat4, quat, vec3, type Mat4, type Vec3 } from 'math';
+import { vec3, type Vec3 } from 'math';
 
 import type { CameraState } from '../CameraState';
 
-const scratchLookMatrix: Mat4 = mat4.create();
+import { lookRotation } from './lookRotation';
 
 /** Rotates `out` so `targetPosition` is dead-center. */
 export function update(out: CameraState, targetPosition: Vec3): void {
-  mat4.targetTo(scratchLookMatrix, out.position, targetPosition, out.referenceUp);
-  quat.fromMat4(out.quaternion, scratchLookMatrix);
+  lookRotation(out.quaternion, out.position, targetPosition, out.referenceUp, out.quaternion);
   vec3.copy(out.lookAtTarget, targetPosition);
   out.hasLookAtTarget = true;
 }
diff --git a/src/core/aim/lookRotation.ts b/src/core/aim/lookRotation.ts
new file mode 100644
index 0000000..db4bd1a
--- /dev/null
+++ b/src/core/aim/lookRotation.ts
@@ -0,0 +1,27 @@
+import { mat4, quat, vec3, type Mat4, type Quat, type Vec3 } from 'math';
+
+const yAxis: Vec3 = [0, 1, 0];
+const forwardAxis: Vec3 = [0, 0, -1];
+const scratchDirection: Vec3 = [0, 0, 0];
+const scratchCross: Vec3 = [0, 0, 0];
+const scratchUp: Vec3 = [0, 0, 0];
+const scratchLookMatrix: Mat4 = mat4.create();
+
+const isParallel = (direction: Vec3, up: Vec3): boolean =>
+  vec3.squaredLength(vec3.cross(scratchCross, direction, up)) < 1e-12 * vec3.squaredLength(direction);
+
+/**
+ * The rotation looking from `position` at `target` with `up` on top. Looking along `up`, the screen's top comes
+ * from `previous`, so passing over the pole keeps the view steady.
+ */
+export function lookRotation(out: Quat, position: Vec3, target: Vec3, up: Vec3, previous: Quat): Quat {
+  vec3.subtract(scratchDirection, target, position);
+  let screenUp = up;
+  if (isParallel(scratchDirection, up)) {
+    vec3.transformQuat(scratchUp, yAxis, previous);
+    if (isParallel(scratchDirection, scratchUp)) vec3.transformQuat(scratchUp, forwardAxis, previous);
+    screenUp = scratchUp;
+  }
+  mat4.targetTo(scratchLookMatrix, position, target, screenUp);
+  return quat.fromMat4(out, scratchLookMatrix);
+}
diff --git a/src/core/aim/rotationComposer.ts b/src/core/aim/rotationComposer.ts
index 0b1b941..74a32f3 100644
--- a/src/core/aim/rotationComposer.ts
+++ b/src/core/aim/rotationComposer.ts
@@ -1,4 +1,4 @@
-import { clamp, degreesToRadians, mat4, quat, vec3, vec4, type Mat4, type Quat, type Vec3 } from 'math';
+import { clamp, degreesToRadians, quat, vec3, vec4, type Quat, type Vec3 } from 'math';
 
 import * as targetExtent from '../TargetExtent';
 import type { CameraState } from '../CameraState';
@@ -10,6 +10,8 @@ import * as predictor from '../damping/predictor';
 import type { DamperState, DampingConstant } from '../damping/damping';
 import type { PredictorState } from '../damping/predictor';
 
+import { lookRotation } from './lookRotation';
+
 export type RotationComposerParams = {
   /** Where the target should land on screen: `[x, y]`, `0` = center, `±1` = edge. */
   screenPosition: [number, number];
@@ -106,7 +108,6 @@ const scratchDesiredDir: Vec3 = [0, 0, 0];
 const scratchDelta: Quat = [0, 0, 0, 1];
 const scratchRight: Vec3 = [0, 0, 0];
 const scratchUp: Vec3 = [0, 0, 0];
-const scratchLookMatrix: Mat4 = mat4.create();
 const scratchExtents: [number, number] = [0, 0];
 /** `[x, y, depth]` of a world point in the camera's screen space. `depth <= 0` means behind the camera. */
 const scratchScreenPoint: [number, number, number] = [0, 0, 0];
@@ -127,21 +128,16 @@ function computeScreenPoint(
   return scratchScreenPoint;
 }
 
-function lookAtRotation(out: Quat, position: Vec3, target: Vec3, up: Vec3): Quat {
-  mat4.targetTo(scratchLookMatrix, position, target, up);
-  return quat.fromMat4(out, scratchLookMatrix);
-}
-
-/** Turns `lookRotation`, which looks at the target, to place it at screen point `(desiredX, desiredY)` instead. */
+/** Turns `lookAt`, which looks at the target, to place it at screen point `(desiredX, desiredY)` instead. */
 function composeRotationForScreenPoint(
   out: Quat,
-  lookRotation: Quat,
+  lookAt: Quat,
   desiredX: number,
   desiredY: number,
   tanHalfFovH: number,
   tanHalfFovV: number,
 ): void {
-  quat.copy(out, lookRotation);
+  quat.copy(out, lookAt);
   if (desiredX === 0 && desiredY === 0) return;
 
   vec3.normalize(scratchDesiredDir, vec3.set(scratchDesiredDir, desiredX * tanHalfFovH, desiredY * tanHalfFovV, -1));
@@ -189,14 +185,25 @@ export function update(
   else quat.identity(scratchTargetRotation);
   vec3.add(target, target, vec3.transformQuat(scratchOffset, params.targetOffset, scratchTargetRotation));
 
-  const { position, referenceUp, quaternion: rotation } = out;
+  const { position, referenceUp, quaternion: rotation, rotationDampingBypass: bypass } = out;
+  if (!activating && bypass[3] !== 1) {
+    quat.normalize(rotation, quat.multiply(rotation, bypass, rotation));
+    quat.normalize(
+      state.publishedLookRotation,
+      quat.multiply(state.publishedLookRotation, bypass, state.publishedLookRotation),
+    );
+    quat.normalize(
+      state.lastActiveDesiredRotation,
+      quat.multiply(state.lastActiveDesiredRotation, bypass, state.lastActiveDesiredRotation),
+    );
+  }
 
   // Publish the damped look-at point so blends do not jump to the raw target position.
   if (activating) {
     damping.reset(state.lookAtDirectionDamper);
     damping.reset(state.lookAtDistanceDamper);
   }
-  lookAtRotation(scratchLookRotation, position, target, referenceUp);
+  lookRotation(scratchLookRotation, position, target, referenceUp, rotation);
   damping.dampQuaternion(
     state.lookAtDirectionDamper,
     state.publishedLookRotation,
diff --git a/src/core/blend/lerpCameraState.ts b/src/core/blend/lerpCameraState.ts
index 86a2c2b..2536735 100644
--- a/src/core/blend/lerpCameraState.ts
+++ b/src/core/blend/lerpCameraState.ts
@@ -148,6 +148,7 @@ export function lerp(
   if (hasLookAtTarget) vec3.lerp(out.lookAtTarget, a.lookAtTarget, b.lookAtTarget, clamped);
   out.hasLookAtTarget = hasLookAtTarget;
   vec3.normalize(out.referenceUp, vec3.lerp(out.referenceUp, a.referenceUp, b.referenceUp, clamped));
+  quat.identity(out.rotationDampingBypass);
 
   if (useLookAtRotation) {
     lerpLookAtRotation(out.quaternion, a, b, clamped, out);
diff --git a/src/core/body/BindingModes.ts b/src/core/body/BindingModes.ts
index 7780056..3b2a240 100644
--- a/src/core/body/BindingModes.ts
+++ b/src/core/body/BindingModes.ts
@@ -1,4 +1,4 @@
-/** Which rotation (if any) `Follow` applies to `offset` before adding it to the target's world position. */
+/** Which rotation (if any) a Body applies to its offset before adding it to the target's world position. */
 export const BindingModes = {
   worldSpace: 'worldSpace',
   lockToTarget: 'lockToTarget',
diff --git a/src/core/body/FollowBody.ts b/src/core/body/FollowBody.ts
index 913ea12..bb8ae97 100644
--- a/src/core/body/FollowBody.ts
+++ b/src/core/body/FollowBody.ts
@@ -16,6 +16,7 @@ export class FollowBody implements FollowParams {
   target: T;
   declare offset: Vec3;
   declare damping: DampingConstant;
+  declare rotationDamping: DampingConstant;
   declare bindingMode: BindingMode;
   declare maxSpeed: number;
 
@@ -28,14 +29,14 @@ export class FollowBody implements FollowParams {
   }
 
   update = (out: CameraState, dt: number, justActivated: boolean): void => {
-    if (this.target !== this.lastTarget) {
+    if (justActivated || this.target !== this.lastTarget) {
       this.lastTarget = this.target;
-      this.state.assigned = false;
+      this.state.tracker.assigned = false;
     }
     follow.update(out, this.state, this, this.readTarget(), dt, justActivated);
   };
 
-  primeFrom = (position: Vec3): void => follow.prime(this.state, this, position);
+  primeFrom = (position: Vec3): void => follow.prime(this.state, position);
 
   /** This frame's target pose, or `null` when there is none. */
   protected readTarget(): TargetPose | null {
diff --git a/src/core/body/OrbitFollowBody.ts b/src/core/body/OrbitFollowBody.ts
new file mode 100644
index 0000000..4715cb7
--- /dev/null
+++ b/src/core/body/OrbitFollowBody.ts
@@ -0,0 +1,72 @@
+import type { Quat, Vec3 } from 'math';
+
+import type { CameraState } from '../CameraState';
+import type { TargetPose } from '../TargetPose';
+
+import type { DampingConstant } from '../damping/damping';
+import type { InputAxisOwner } from '../input/InputAxisOwner';
+
+import * as orbitFollow from './orbitFollow';
+import type { BindingMode } from './BindingModes';
+import type { OrbitFollowParams, OrbitStyle, RecenteringTarget } from './orbitFollow';
+import type { Orbits } from './threeRing';
+
+export type OrbitFollowOptions = Partial;
+
+/**
+ * Orbits a target on a sphere or through three rings, driven by three `InputAxis`: `horizontal`, `vertical` and `radial`.
+ * Layers override `readTarget`.
+ */
+export class OrbitFollowBody implements OrbitFollowParams, InputAxisOwner {
+  target: T;
+  declare orbitStyle: OrbitStyle;
+  declare radius: number;
+  declare orbits: Orbits;
+  declare splineCurvature: number;
+  declare targetOffset: Vec3;
+  declare bindingMode: BindingMode;
+  declare damping: DampingConstant;
+  declare rotationDamping: DampingConstant;
+  declare maxSpeed: number;
+  declare recenteringTarget: RecenteringTarget;
+
+  readonly state = orbitFollow.createState();
+  readonly horizontal = this.state.horizontal;
+  readonly vertical = this.state.vertical;
+  readonly radial = this.state.radial;
+  readonly inputAxes = { horizontal: this.horizontal, vertical: this.vertical, radial: this.radial };
+  private lastTarget: T | undefined = undefined;
+
+  constructor(target: T, options?: OrbitFollowOptions) {
+    this.target = target;
+    Object.assign(this, orbitFollow.createParams(options));
+  }
+
+  update = (out: CameraState, dt: number, justActivated: boolean): boolean => {
+    if (justActivated || this.target !== this.lastTarget) {
+      this.lastTarget = this.target;
+      this.state.tracker.assigned = false;
+    }
+    return orbitFollow.update(out, this.state, this, this.readTarget(), dt, justActivated);
+  };
+
+  /** Start from `position`'s direction around the target, keeping the zoom. */
+  primeFrom = (position: Vec3): void => orbitFollow.prime(this.state, position);
+
+  /** Eases the camera toward `position`'s direction around the target, keeping the zoom. */
+  setFromPosition = (position: Vec3): void => {
+    const pose = this.readTarget();
+    if (pose) orbitFollow.setFromPosition(this.state, this, pose, position);
+  };
+
+  /** Eases the camera around the target until it looks along `rotation`'s forward, keeping the zoom. */
+  setFromRotation = (rotation: Quat): void => {
+    const pose = this.readTarget();
+    if (pose) orbitFollow.setFromRotation(this.state, this, pose, rotation);
+  };
+
+  /** This frame's target pose, or `null` when there is none. */
+  protected readTarget(): TargetPose | null {
+    return this.target as TargetPose | null;
+  }
+}
diff --git a/src/core/body/follow.ts b/src/core/body/follow.ts
index 3817563..d742692 100644
--- a/src/core/body/follow.ts
+++ b/src/core/body/follow.ts
@@ -1,19 +1,22 @@
-import { mat4, quat, vec3, type Mat4, type Quat, type Vec3 } from 'math';
+import { vec3, type Quat, type Vec3 } from 'math';
 
 import type { CameraState } from '../CameraState';
 import { withDefaults } from '../params';
 import type { TargetPose } from '../TargetPose';
 
-import * as damping from '../damping/damping';
-import type { DampingConstant, Vector3DamperState } from '../damping/damping';
+import type { DampingConstant } from '../damping/damping';
 
+import * as tracker from './tracker';
 import { BindingModes, type BindingMode } from './BindingModes';
+import type { TrackerState } from './tracker';
 
 export type FollowParams = {
   /** Offset from the target, rotated according to `bindingMode`. */
   offset: Vec3;
   /** Response time for following the target position. */
   damping: DampingConstant;
+  /** Response time for turning with the target, for every `bindingMode` but `worldSpace`. */
+  rotationDamping: DampingConstant;
   /** Rotation frame used to interpret `offset`. */
   bindingMode: BindingMode;
   /** Maximum damping speed, in world units/sec. */
@@ -23,69 +26,37 @@ export type FollowParams = {
 /** Every setting from `settings`, or its default. */
 export const createParams = (settings?: Partial): FollowParams =>
   withDefaults(
-    { offset: [0, 0, 10], damping: 0, bindingMode: BindingModes.lockToTarget, maxSpeed: Infinity },
+    { offset: [0, 0, 10], damping: 0, rotationDamping: 0, bindingMode: BindingModes.lockToTarget, maxSpeed: Infinity },
     settings,
   );
 
 export type FollowState = {
-  damper: Vector3DamperState;
+  tracker: TrackerState;
+  /** Position set by `prime`, applied once a target is available. */
+  primePosition: Vec3;
   primed: boolean;
-  /** Target rotation captured by `lockToTargetOnAssign`, valid while `assigned`. */
-  assignedRotation: Quat;
-  assigned: boolean;
 };
 
 export const createState = (): FollowState => ({
-  damper: damping.createVector3State(),
+  tracker: tracker.createState(),
+  primePosition: [0, 0, 0],
   primed: false,
-  assignedRotation: [0, 0, 0, 1],
-  assigned: false,
 });
 
 /** Whether `update` will read `target.rotation` this frame. */
 export const needsTargetRotation = (state: FollowState, params: FollowParams): boolean =>
-  params.bindingMode !== BindingModes.worldSpace &&
-  !(params.bindingMode === BindingModes.lockToTargetOnAssign && state.assigned);
+  tracker.needsTargetRotation(state.tracker, params.bindingMode);
 
 const worldUp: Vec3 = [0, 1, 0];
-const forwardAxis: Vec3 = [0, 0, -1];
-const origin: Vec3 = [0, 0, 0];
+const noOffset: Vec3 = [0, 0, 0];
 const scratchRotation: Quat = [0, 0, 0, 1];
 const scratchRotatedOffset: Vec3 = [0, 0, 0];
-const scratchDesired: Vec3 = [0, 0, 0];
-const scratchForward: Vec3 = [0, 0, 0];
-const scratchLookMatrix: Mat4 = mat4.create();
 
-function resolveOffsetRotation(out: Quat, state: FollowState, params: FollowParams, target: TargetPose): void {
-  if (params.bindingMode === BindingModes.worldSpace) {
-    quat.identity(out);
-    return;
-  }
-
-  if (params.bindingMode === BindingModes.lockToTargetOnAssign) {
-    if (!state.assigned) {
-      state.assigned = true;
-      if (target.hasRotation) quat.copy(state.assignedRotation, target.rotation);
-      else quat.identity(state.assignedRotation);
-    }
-    quat.copy(out, state.assignedRotation);
-    return;
-  }
-
-  if (!target.hasRotation) {
-    quat.identity(out);
-    return;
-  }
-  quat.copy(out, target.rotation);
-
-  if (params.bindingMode === BindingModes.lockToTarget) return;
-
-  vec3.transformQuat(scratchForward, forwardAxis, out);
-  if (params.bindingMode === BindingModes.lockToTargetWithWorldUp) scratchForward[1] = 0;
-  if (vec3.squaredLength(scratchForward) < 1e-10) return; // degenerate (straight up/down): keep the full rotation
-  vec3.normalize(scratchForward, scratchForward);
-  mat4.targetTo(scratchLookMatrix, origin, scratchForward, worldUp);
-  quat.fromMat4(out, scratchLookMatrix);
+function startFromPrime(state: FollowState, params: FollowParams, target: TargetPose): void {
+  tracker.referenceOrientation(scratchRotation, state.tracker, params.bindingMode, target);
+  vec3.transformQuat(scratchRotatedOffset, params.offset, scratchRotation);
+  vec3.subtract(scratchRotatedOffset, state.primePosition, scratchRotatedOffset);
+  tracker.prime(state.tracker, scratchRotatedOffset, params.offset, scratchRotation);
 }
 
 /** Moves `out` to the target position plus `offset`, rotated according to `bindingMode`. A `null` target leaves `out` as is. */
@@ -97,24 +68,21 @@ export function update(
   dt: number,
   justActivated: boolean,
 ): void {
-  if (justActivated) {
-    if (state.primed) state.primed = false;
-    else damping.resetVector3(state.damper);
-  }
+  if (justActivated && !state.primed) tracker.reset(state.tracker);
   if (!target) return;
+  if (state.primed) {
+    state.primed = false;
+    startFromPrime(state, params, target);
+  }
 
-  resolveOffsetRotation(scratchRotation, state, params, target);
-  vec3.transformQuat(scratchRotatedOffset, params.offset, scratchRotation);
-  vec3.add(scratchDesired, scratchRotatedOffset, target.position);
-
-  damping.dampVector3(state.damper, out.position, scratchDesired, params.damping, dt, params.maxSpeed);
-  vec3.subtract(out.target, out.position, scratchRotatedOffset);
+  tracker.trackTarget(out.target, scratchRotation, state.tracker, params, target, params.offset, noOffset, dt);
+  vec3.add(out.position, out.target, vec3.transformQuat(scratchRotatedOffset, params.offset, scratchRotation));
   out.hasTarget = true;
   vec3.transformQuat(out.referenceUp, worldUp, scratchRotation);
 }
 
 /** Start the next activation from `position` instead of snapping to the target. */
-export function prime(state: FollowState, params: FollowParams, position: Vec3): void {
-  damping.dampVector3(state.damper, position, position, params.damping, 0);
+export function prime(state: FollowState, position: Vec3): void {
+  vec3.copy(state.primePosition, position);
   state.primed = true;
 }
diff --git a/src/core/body/index.ts b/src/core/body/index.ts
index 7875711..34fbb0b 100644
--- a/src/core/body/index.ts
+++ b/src/core/body/index.ts
@@ -8,6 +8,14 @@ export { FollowBody, type FollowOptions } from './FollowBody';
 export * as follow from './follow';
 export type { FollowParams, FollowState } from './follow';
 
+export { OrbitFollowBody, type OrbitFollowOptions } from './OrbitFollowBody';
+export * as orbitFollow from './orbitFollow';
+export type { OrbitFollowParams, OrbitFollowState, OrbitStyle, RecenteringTarget } from './orbitFollow';
+export * as threeRing from './threeRing';
+export type { Orbit, Orbits, ThreeRingState } from './threeRing';
+export * as tracker from './tracker';
+export type { TrackerParams, TrackerState } from './tracker';
+
 export { PositionComposerBody } from './PositionComposerBody';
 export * as positionComposer from './positionComposer';
 export type { PositionComposerParams, PositionComposerState } from './positionComposer';
diff --git a/src/core/body/orbitFollow.ts b/src/core/body/orbitFollow.ts
new file mode 100644
index 0000000..79c429e
--- /dev/null
+++ b/src/core/body/orbitFollow.ts
@@ -0,0 +1,372 @@
+import { clamp, degreesToRadians, quat, radiansToDegrees, vec3, type Euler, type Quat, type Vec3 } from 'math';
+
+import type { CameraState } from '../CameraState';
+import { withDefaults } from '../params';
+import type { TargetPose } from '../TargetPose';
+
+import * as damping from '../damping/damping';
+import type { DamperState, DampingConstant } from '../damping/damping';
+import type { InputAxisParams } from '../input/axis';
+import { InputAxis } from '../input/InputAxis';
+import { shortestWrappedDelta } from '../input/shortestWrappedDelta';
+
+import * as threeRing from './threeRing';
+import * as tracker from './tracker';
+import { BindingModes, type BindingMode } from './BindingModes';
+import { safeFromToRotation } from './safeFromToRotation';
+import type { Orbits, ThreeRingState } from './threeRing';
+import type { TrackerState } from './tracker';
+
+export type OrbitFollowParams = {
+  /** Shape the camera moves on: a sphere of `radius`, or a surface through three `orbits`. */
+  orbitStyle: OrbitStyle;
+  /** Distance from the target while `radial` is `0`, for `sphere`. Changes ease in with `radial.damping`. */
+  radius: number;
+  /** Rings the `threeRing` surface passes through, from `vertical`'s minimum to its maximum. */
+  orbits: Orbits;
+  /** How strongly the `threeRing` surface curves between the rings, from `0` to `1`. */
+  splineCurvature: number;
+  /** Center of the orbit relative to the target, rotated according to `bindingMode`. */
+  targetOffset: Vec3;
+  /** Rotation frame the orbit is measured in. */
+  bindingMode: BindingMode;
+  /** Response time for following the target position. */
+  damping: DampingConstant;
+  /** Response time for turning with the target, for every `bindingMode` but `worldSpace`. */
+  rotationDamping: DampingConstant;
+  /** Maximum damping speed, in world units/sec. */
+  maxSpeed: number;
+  /** What `horizontal` recenters to: its `center`, or the side behind the target's forward. */
+  recenteringTarget: RecenteringTarget;
+};
+
+export type OrbitStyle = 'sphere' | 'threeRing';
+
+export type RecenteringTarget = 'axisCenter' | 'trackingTarget';
+
+/** Every setting from `settings`, or its default. */
+export const createParams = (settings?: Partial): OrbitFollowParams =>
+  withDefaults(
+    {
+      orbitStyle: 'sphere',
+      radius: 10,
+      orbits: {
+        top: { height: 10, radius: 10 },
+        center: { height: 0, radius: 10 },
+        bottom: { height: -10, radius: 10 },
+      },
+      splineCurvature: 0,
+      targetOffset: [0, 0, 0],
+      bindingMode: BindingModes.worldSpace,
+      damping: 0,
+      rotationDamping: 0,
+      maxSpeed: Infinity,
+      recenteringTarget: 'trackingTarget',
+    },
+    settings,
+  );
+
+/**
+ * `horizontal` (around the target, wraps ±180°) and `vertical` (elevation, or from the bottom to the top ring) in
+ * degrees, and `radial` as the natural log of the radius scale.
+ */
+export type OrbitFollowState = {
+  horizontal: InputAxis;
+  vertical: InputAxis;
+  radial: InputAxis;
+  radius: DamperState;
+  threeRing: ThreeRingState;
+  tracker: TrackerState;
+  /** Binding frame of the last `update`. */
+  orientation: Quat;
+  /** Position set by `prime`, applied once a target is available. */
+  primePosition: Vec3;
+  primed: boolean;
+};
+
+type AxisSettings = Partial;
+
+/** Default settings of each axis. Every axis starts at its `center`. */
+export const createAxisSettings = (): { horizontal: AxisSettings; vertical: AxisSettings; radial: AxisSettings } => ({
+  horizontal: { center: 0, range: [-180, 180], wrap: true },
+  vertical: { center: 0, range: [-90, 90] },
+  radial: { center: 0, range: [Math.log(0.5), Math.log(2)] },
+});
+
+export function createState(): OrbitFollowState {
+  const { horizontal, vertical, radial } = createAxisSettings();
+  return {
+    horizontal: new InputAxis({ ...horizontal, value: horizontal.center }),
+    vertical: new InputAxis({ ...vertical, value: vertical.center }),
+    radial: new InputAxis({ ...radial, value: radial.center }),
+    radius: damping.createState(),
+    threeRing: threeRing.createState(),
+    tracker: tracker.createState(),
+    orientation: [0, 0, 0, 1],
+    primePosition: [0, 0, 0],
+    primed: false,
+  };
+}
+
+const recentersBehindTarget = (state: OrbitFollowState, params: OrbitFollowParams): boolean =>
+  params.recenteringTarget === 'trackingTarget' && state.horizontal.recentering.enabled;
+
+/** Whether `update` will read `target.rotation` this frame. */
+export const needsTargetRotation = (state: OrbitFollowState, params: OrbitFollowParams): boolean =>
+  tracker.needsTargetRotation(state.tracker, params.bindingMode) || recentersBehindTarget(state, params);
+
+/** Start the next update from `position`'s direction around the target. `radial` keeps its value. */
+export function prime(state: OrbitFollowState, position: Vec3): void {
+  vec3.copy(state.primePosition, position);
+  state.primed = true;
+}
+
+const poleLimit = 90 - 1e-3;
+const worldUp: Vec3 = [0, 1, 0];
+const forwardAxis: Vec3 = [0, 0, -1];
+const scratchEuler: Euler = [0, 0, 0, 'yxz'];
+const scratchRotation: Quat = [0, 0, 0, 1];
+const scratchOffset: Vec3 = [0, 0, 0];
+const scratchOrientation: Quat = [0, 0, 0, 1];
+const scratchInverse: Quat = [0, 0, 0, 1];
+const backAxis: Vec3 = [0, 0, 1];
+const scratchDirection: Vec3 = [0, 0, 0];
+const scratchWorld: Vec3 = [0, 0, 0];
+const scratchAxes: [number, number] = [0, 0];
+const scratchPreviousOffset: Vec3 = [0, 0, 0];
+
+/** Where `value` is within `axis`' range, from `0` to `1`. */
+function normalize(axis: InputAxis, value: number): number {
+  const range = axis.range;
+  if (!range || range[1] <= range[0]) return 0.5;
+  return clamp((value - range[0]) / (range[1] - range[0]), 0, 1);
+}
+
+/** The camera's offset from the tracked point at these axis values, in the binding frame. */
+function orbitOffset(
+  out: Vec3,
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  horizontal: number,
+  vertical: number,
+) {
+  const scale = Math.exp(state.radial.value);
+  if (params.orbitStyle === 'threeRing') {
+    const t = normalize(state.vertical, vertical);
+    threeRing.point(out, state.threeRing, params.orbits, params.splineCurvature, t);
+    vec3.scale(out, out, scale);
+    quat.setAxisAngle(scratchRotation, worldUp, -degreesToRadians(horizontal));
+  } else {
+    // At a pole the horizontal angle no longer moves the camera, so the view could not turn with it.
+    scratchEuler[0] = -degreesToRadians(clamp(vertical, -poleLimit, poleLimit));
+    scratchEuler[1] = -degreesToRadians(horizontal);
+    quat.fromEuler(scratchRotation, scratchEuler);
+    vec3.set(out, 0, 0, state.radius.value * scale);
+  }
+  return vec3.transformQuat(out, out, scratchRotation);
+}
+
+/** Where the camera would be at these axis values, around the tracked point and in the frame of the last `update`. */
+export function point(
+  out: Vec3,
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  horizontal: number,
+  vertical: number,
+): Vec3 {
+  orbitOffset(out, state, params, horizontal, vertical);
+  vec3.transformQuat(out, out, state.orientation);
+  return vec3.add(out, out, state.tracker.trackedPoint);
+}
+
+function directionFrom(
+  out: Vec3,
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  target: TargetPose,
+  position: Vec3,
+) {
+  tracker.referenceOrientation(scratchOrientation, state.tracker, params.bindingMode, target);
+  vec3.add(out, target.position, vec3.transformQuat(out, params.targetOffset, scratchOrientation));
+  return vec3.subtract(out, position, out);
+}
+
+/** The `horizontal` and `vertical` values that put the camera along world `direction` from the orbit's center. */
+function axesAlong(
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  target: TargetPose,
+  direction: Vec3,
+): [number, number] | null {
+  tracker.referenceOrientation(scratchOrientation, state.tracker, params.bindingMode, target);
+  vec3.transformQuat(scratchDirection, direction, quat.conjugate(scratchInverse, scratchOrientation));
+  const x = scratchDirection[0];
+  const y = scratchDirection[1];
+  const z = scratchDirection[2];
+  if (x * x + y * y + z * z < 1e-12) return null;
+  scratchAxes[0] = radiansToDegrees(Math.atan2(-x, z));
+  const elevation = Math.atan2(y, Math.hypot(x, z));
+  const range = state.vertical.range;
+  if (params.orbitStyle !== 'threeRing') scratchAxes[1] = radiansToDegrees(elevation);
+  else if (range) scratchAxes[1] = range[0] + closestOrbitPoint(state, params, elevation) * (range[1] - range[0]);
+  else scratchAxes[1] = state.vertical.value;
+  return scratchAxes;
+}
+
+function easeAxesTo(state: OrbitFollowState, axes: [number, number] | null): void {
+  if (!axes) return;
+  const { horizontal, vertical } = state;
+  const wrapped = horizontal.wrap && horizontal.range;
+  horizontal.applyDelta(
+    wrapped ? shortestWrappedDelta(horizontal.rawValue, axes[0], wrapped) : axes[0] - horizontal.rawValue,
+  );
+  vertical.applyDelta(axes[1] - vertical.rawValue);
+}
+
+/** Eases `horizontal` and `vertical` toward `position`'s direction around the target. `radial` keeps its value. */
+export function setFromPosition(
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  target: TargetPose,
+  position: Vec3,
+): void {
+  easeAxesTo(state, axesAlong(state, params, target, directionFrom(scratchWorld, state, params, target, position)));
+}
+
+/** Eases `horizontal` and `vertical` so the camera looks along `rotation`'s forward at the target. */
+export function setFromRotation(
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  target: TargetPose,
+  rotation: Quat,
+): void {
+  easeAxesTo(state, axesAlong(state, params, target, vec3.transformQuat(scratchWorld, backAxis, rotation)));
+}
+
+function primeAxes(state: OrbitFollowState, params: OrbitFollowParams, target: TargetPose, position: Vec3): void {
+  const axes = axesAlong(state, params, target, directionFrom(scratchWorld, state, params, target, position));
+  if (!axes) return;
+  state.horizontal.setValue(axes[0]);
+  state.vertical.setValue(axes[1]);
+}
+
+function elevationError(state: OrbitFollowState, params: OrbitFollowParams, t: number, elevation: number): number {
+  threeRing.point(scratchDirection, state.threeRing, params.orbits, params.splineCurvature, t);
+  return Math.abs(Math.atan2(scratchDirection[1], scratchDirection[2]) - elevation);
+}
+
+/** Where between the bottom (`0`) and top (`1`) ring the direction from the target is closest to `elevation`. */
+function closestOrbitPoint(state: OrbitFollowState, params: OrbitFollowParams, elevation: number): number {
+  const samples = 32;
+  let best = 0;
+  let bestError = Infinity;
+  for (let i = 0; i <= samples; i++) {
+    const error = elevationError(state, params, i / samples, elevation);
+    if (error < bestError) {
+      bestError = error;
+      best = i / samples;
+    }
+  }
+  for (let step = 0.5 / samples; step > 1e-7; step /= 2) {
+    const below = clamp(best - step, 0, 1);
+    const above = clamp(best + step, 0, 1);
+    const belowError = elevationError(state, params, below, elevation);
+    const aboveError = elevationError(state, params, above, elevation);
+    if (belowError < bestError && belowError <= aboveError) {
+      best = below;
+      bestError = belowError;
+    } else if (aboveError < bestError) {
+      best = above;
+      bestError = aboveError;
+    }
+  }
+  return best;
+}
+
+function centerBehindTarget(state: OrbitFollowState, params: OrbitFollowParams, target: TargetPose): void {
+  if (!target.hasRotation) return;
+  tracker.referenceOrientation(scratchOrientation, state.tracker, params.bindingMode, target);
+  vec3.transformQuat(scratchDirection, forwardAxis, target.rotation);
+  vec3.transformQuat(scratchDirection, scratchDirection, quat.conjugate(scratchInverse, scratchOrientation));
+  const x = scratchDirection[0];
+  const z = scratchDirection[2];
+  if (x * x + z * z < 1e-12) return;
+  state.horizontal.center = radiansToDegrees(Math.atan2(x, -z));
+}
+
+const isActive = (axis: InputAxis): boolean => axis.held || axis.hadDelta;
+
+// Counting as input restarts the axis' recentering wait.
+function shareInput(axis: InputAxis, other: InputAxis, otherActive: boolean): void {
+  if (otherActive && other.recentering.time === axis.recentering.time) axis.hadDelta = true;
+}
+
+/** Input on one axis restarts the recentering wait of every axis with the same `recentering.time`. */
+function syncRecentering({ horizontal, vertical, radial }: OrbitFollowState): void {
+  const h = isActive(horizontal);
+  const v = isActive(vertical);
+  const r = isActive(radial);
+  shareInput(horizontal, vertical, v);
+  shareInput(horizontal, radial, r);
+  shareInput(vertical, horizontal, h);
+  shareInput(vertical, radial, r);
+  shareInput(radial, horizontal, h);
+  shareInput(radial, vertical, v);
+}
+
+/**
+ * Advances the axes and places `out` on the orbit around the target. A `null` target leaves `out` as is.
+ * Returns `true` while an axis still has to move.
+ */
+export function update(
+  out: CameraState,
+  state: OrbitFollowState,
+  params: OrbitFollowParams,
+  target: TargetPose | null,
+  dt: number,
+  justActivated: boolean,
+): boolean {
+  quat.identity(out.rotationDampingBypass);
+  if (justActivated) {
+    tracker.reset(state.tracker);
+    damping.reset(state.radius);
+    state.horizontal.idleTime = 0;
+    state.vertical.idleTime = 0;
+    state.radial.idleTime = 0;
+  }
+  if (target && recentersBehindTarget(state, params)) centerBehindTarget(state, params, target);
+  syncRecentering(state);
+  const horizontalMoving = state.horizontal.update(dt);
+  const verticalMoving = state.vertical.update(dt);
+  const radialMoving = state.radial.update(dt);
+  const radius = damping.damp(state.radius, params.radius, state.radial.damping, dt).value;
+  const moving = horizontalMoving || verticalMoving || radialMoving || radius !== params.radius;
+  if (!target) return moving;
+  if (state.primed) {
+    state.primed = false;
+    primeAxes(state, params, target, state.primePosition);
+  }
+
+  orbitOffset(scratchOffset, state, params, state.horizontal.value, state.vertical.value);
+
+  const hadPrevious = state.tracker.hasPrevious;
+  vec3.copy(scratchPreviousOffset, state.tracker.previousOffset);
+  tracker.trackTarget(
+    out.target,
+    state.orientation,
+    state.tracker,
+    params,
+    target,
+    scratchOffset,
+    params.targetOffset,
+    dt,
+  );
+  vec3.add(out.position, out.target, vec3.transformQuat(scratchOffset, scratchOffset, state.orientation));
+  out.hasTarget = true;
+  vec3.transformQuat(out.referenceUp, worldUp, state.orientation);
+  if (hadPrevious) {
+    vec3.transformQuat(scratchPreviousOffset, scratchPreviousOffset, state.orientation);
+    safeFromToRotation(out.rotationDampingBypass, scratchPreviousOffset, scratchOffset, out.referenceUp);
+  }
+  return moving;
+}
diff --git a/src/core/body/safeFromToRotation.ts b/src/core/body/safeFromToRotation.ts
new file mode 100644
index 0000000..d555979
--- /dev/null
+++ b/src/core/body/safeFromToRotation.ts
@@ -0,0 +1,21 @@
+import { quat, vec3, type Quat, type Vec3 } from 'math';
+
+const scratchProjectedFrom: Vec3 = [0, 0, 0];
+const scratchProjectedTo: Vec3 = [0, 0, 0];
+const scratchAxis: Vec3 = [0, 0, 0];
+const scratchPitch: Quat = [0, 0, 0, 1];
+
+/** Rotation from `from` to `to` as a turn around `up` followed by a pitch, so it never adds roll. */
+export function safeFromToRotation(out: Quat, from: Vec3, to: Vec3, up: Vec3): Quat {
+  vec3.scaleAndAdd(scratchProjectedFrom, from, up, -vec3.dot(from, up));
+  vec3.scaleAndAdd(scratchProjectedTo, to, up, -vec3.dot(to, up));
+  if (vec3.squaredLength(scratchProjectedFrom) < 1e-10 || vec3.squaredLength(scratchProjectedTo) < 1e-10) {
+    vec3.cross(scratchAxis, from, to);
+    if (vec3.squaredLength(scratchAxis) < 1e-10) vec3.copy(scratchAxis, up);
+    return quat.setAxisAngle(out, vec3.normalize(scratchAxis, scratchAxis), vec3.angle(from, to));
+  }
+  vec3.normalize(scratchAxis, vec3.cross(scratchAxis, up, from));
+  quat.setAxisAngle(scratchPitch, scratchAxis, vec3.angle(to, up) - vec3.angle(from, up));
+  quat.setAxisAngle(out, up, vec3.signedAngle(scratchProjectedFrom, scratchProjectedTo, up));
+  return quat.multiply(out, out, scratchPitch);
+}
diff --git a/src/core/body/threeRing.ts b/src/core/body/threeRing.ts
new file mode 100644
index 0000000..dd5ba03
--- /dev/null
+++ b/src/core/body/threeRing.ts
@@ -0,0 +1,138 @@
+import { clamp, type Vec3 } from 'math';
+
+/** A horizontal ring around the target. */
+export type Orbit = {
+  /** Horizontal distance from the target. */
+  radius: number;
+  /** Height above the target. */
+  height: number;
+};
+
+export type Orbits = { top: Orbit; center: Orbit; bottom: Orbit };
+
+/** A smooth curve through the rings, as `[height, radius]` knots with Bezier control points between them. */
+export type ThreeRingState = {
+  /** An extrapolated end, bottom, center, top and another extrapolated end. */
+  knots: number[];
+  ctrl1: number[];
+  ctrl2: number[];
+  /** Settings the curve was built for. */
+  builtFor: number[];
+};
+
+const knotCount = 5;
+
+export const createState = (): ThreeRingState => ({
+  knots: new Array(knotCount * 2).fill(0),
+  ctrl1: new Array(knotCount * 2).fill(0),
+  ctrl2: new Array(knotCount * 2).fill(0),
+  builtFor: new Array(7).fill(Number.NaN),
+});
+
+function isBuiltFor(state: ThreeRingState, orbits: Orbits, splineCurvature: number): boolean {
+  const built = state.builtFor;
+  return (
+    built[0] === orbits.bottom.height &&
+    built[1] === orbits.bottom.radius &&
+    built[2] === orbits.center.height &&
+    built[3] === orbits.center.radius &&
+    built[4] === orbits.top.height &&
+    built[5] === orbits.top.radius &&
+    built[6] === splineCurvature
+  );
+}
+
+function setKnot(knots: number[], index: number, height: number, radius: number): void {
+  knots[index * 2] = height;
+  knots[index * 2 + 1] = radius;
+}
+
+const a = new Array(knotCount).fill(0);
+const b = new Array(knotCount).fill(0);
+const c = new Array(knotCount).fill(0);
+const r = new Array(knotCount).fill(0);
+
+// Solves for control points that keep the curve's first and second derivatives continuous across knots.
+function computeControlPoints({ knots, ctrl1, ctrl2 }: ThreeRingState): void {
+  const n = knotCount - 1;
+  for (let axis = 0; axis < 2; axis++) {
+    const k = (i: number): number => knots[i * 2 + axis];
+    a[0] = 0;
+    b[0] = 2;
+    c[0] = 1;
+    r[0] = k(0) + 2 * k(1);
+    for (let i = 1; i < n - 1; i++) {
+      a[i] = 1;
+      b[i] = 4;
+      c[i] = 1;
+      r[i] = 4 * k(i) + 2 * k(i + 1);
+    }
+    a[n - 1] = 2;
+    b[n - 1] = 7;
+    c[n - 1] = 0;
+    r[n - 1] = 8 * k(n - 1) + k(n);
+
+    for (let i = 1; i < n; i++) {
+      const m = a[i] / b[i - 1];
+      b[i] -= m * c[i - 1];
+      r[i] -= m * r[i - 1];
+    }
+    ctrl1[(n - 1) * 2 + axis] = r[n - 1] / b[n - 1];
+    for (let i = n - 2; i >= 0; i--) ctrl1[i * 2 + axis] = (r[i] - c[i] * ctrl1[(i + 1) * 2 + axis]) / b[i];
+    for (let i = 0; i < n - 1; i++) ctrl2[i * 2 + axis] = 2 * k(i + 1) - ctrl1[(i + 1) * 2 + axis];
+    ctrl2[(n - 1) * 2 + axis] = 0.5 * (k(n) + ctrl1[(n - 1) * 2 + axis]);
+  }
+}
+
+function build(state: ThreeRingState, orbits: Orbits, splineCurvature: number): void {
+  const { bottom, center, top } = orbits;
+  const { knots, builtFor } = state;
+  setKnot(knots, 1, bottom.height, bottom.radius);
+  setKnot(knots, 2, center.height, center.radius);
+  setKnot(knots, 3, top.height, top.radius);
+  // The ends continue past the outer rings and pull toward the target as the curvature grows.
+  const keep = 1 - clamp(splineCurvature, 0, 1);
+  setKnot(
+    knots,
+    0,
+    keep * (1.5 * bottom.height - 0.5 * center.height),
+    keep * (1.5 * bottom.radius - 0.5 * center.radius),
+  );
+  setKnot(knots, 4, keep * (1.5 * top.height - 0.5 * center.height), keep * (1.5 * top.radius - 0.5 * center.radius));
+  computeControlPoints(state);
+
+  builtFor[0] = bottom.height;
+  builtFor[1] = bottom.radius;
+  builtFor[2] = center.height;
+  builtFor[3] = center.radius;
+  builtFor[4] = top.height;
+  builtFor[5] = top.radius;
+  builtFor[6] = splineCurvature;
+}
+
+/**
+ * Writes the point of the curve at `t` to `out` as `[0, height, radius]`: `0` is the bottom ring, `0.5` the center
+ * ring and `1` the top ring. Rebuilds the curve only when the rings or the curvature changed.
+ */
+export function point(out: Vec3, state: ThreeRingState, orbits: Orbits, splineCurvature: number, t: number): Vec3 {
+  if (!isBuiltFor(state, orbits, splineCurvature)) build(state, orbits, splineCurvature);
+  const { knots, ctrl1, ctrl2 } = state;
+
+  let s = clamp(t, 0, 1) * 2;
+  let segment = 1;
+  if (s > 1) {
+    s -= 1;
+    segment = 2;
+  }
+  const d = 1 - s;
+  const w0 = d * d * d;
+  const w1 = 3 * d * d * s;
+  const w2 = 3 * d * s * s;
+  const w3 = s * s * s;
+  const i = segment * 2;
+  const j = (segment + 1) * 2;
+  out[0] = 0;
+  out[1] = w0 * knots[i] + w1 * ctrl1[i] + w2 * ctrl2[i] + w3 * knots[j];
+  out[2] = w0 * knots[i + 1] + w1 * ctrl1[i + 1] + w2 * ctrl2[i + 1] + w3 * knots[j + 1];
+  return out;
+}
diff --git a/src/core/body/tracker.ts b/src/core/body/tracker.ts
new file mode 100644
index 0000000..bfceff8
--- /dev/null
+++ b/src/core/body/tracker.ts
@@ -0,0 +1,170 @@
+import { mat4, quat, vec3, type Mat4, type Quat, type Vec3 } from 'math';
+
+import type { TargetPose } from '../TargetPose';
+
+import * as damping from '../damping/damping';
+import type { DamperState, DampingConstant, Vector3DamperState } from '../damping/damping';
+
+import { BindingModes, type BindingMode } from './BindingModes';
+import { safeFromToRotation } from './safeFromToRotation';
+
+export type TrackerParams = {
+  /** Rotation frame of the camera offset and the target offset. */
+  bindingMode: BindingMode;
+  /** Response time for following the target position. */
+  damping: DampingConstant;
+  /** Response time for turning with the target, for every `bindingMode` but `worldSpace`. */
+  rotationDamping: DampingConstant;
+  /** Maximum damping speed, in world units/sec. */
+  maxSpeed: number;
+};
+
+export type TrackerState = {
+  /** Damped target position, the point the camera offset is added to. */
+  trackedPoint: Vec3;
+  previousOffset: Vec3;
+  hasPrevious: boolean;
+  damper: Vector3DamperState;
+  /** Damped `bindingMode` rotation, the frame of the offsets. */
+  orientation: Quat;
+  rotationDamper: DamperState;
+  /** Target rotation captured on entering `lockToTargetOnAssign`, valid while `assigned`. */
+  assignedRotation: Quat;
+  assigned: boolean;
+};
+
+export const createState = (): TrackerState => ({
+  trackedPoint: [0, 0, 0],
+  previousOffset: [0, 0, 0],
+  hasPrevious: false,
+  damper: damping.createVector3State(),
+  orientation: [0, 0, 0, 1],
+  rotationDamper: damping.createState(),
+  assignedRotation: [0, 0, 0, 1],
+  assigned: false,
+});
+
+/** Makes the next `trackTarget` snap to the target. */
+export function reset(state: TrackerState): void {
+  state.hasPrevious = false;
+  damping.resetVector3(state.damper);
+  damping.reset(state.rotationDamper);
+}
+
+// A step of zero length marks a damper as started, so its next step eases instead of snapping.
+function start(damper: DamperState): void {
+  damping.damp(damper, damper.value, 1, 0);
+}
+
+/** Makes the next `trackTarget` ease from `point` and `orientation` instead of snapping to the target. */
+export function prime(state: TrackerState, point: Vec3, offset: Vec3, orientation: Quat): void {
+  reset(state);
+  vec3.copy(state.trackedPoint, point);
+  vec3.copy(state.previousOffset, offset);
+  quat.copy(state.orientation, orientation);
+  state.hasPrevious = true;
+  start(state.damper.x);
+  start(state.damper.y);
+  start(state.damper.z);
+  start(state.rotationDamper);
+}
+
+/** Whether `referenceOrientation` will read `target.rotation` this frame. */
+export const needsTargetRotation = (state: Pick, bindingMode: BindingMode): boolean =>
+  bindingMode !== BindingModes.worldSpace && !(bindingMode === BindingModes.lockToTargetOnAssign && state.assigned);
+
+const worldUp: Vec3 = [0, 1, 0];
+const forwardAxis: Vec3 = [0, 0, -1];
+const origin: Vec3 = [0, 0, 0];
+const scratchForward: Vec3 = [0, 0, 0];
+const scratchLookMatrix: Mat4 = mat4.create();
+
+/** The rotation `bindingMode` applies to offsets around `target`. Captures it on entering `lockToTargetOnAssign`. */
+export function referenceOrientation(
+  out: Quat,
+  state: Pick,
+  bindingMode: BindingMode,
+  target: TargetPose,
+): Quat {
+  if (bindingMode !== BindingModes.lockToTargetOnAssign) state.assigned = false;
+  if (bindingMode === BindingModes.worldSpace) return quat.identity(out);
+
+  if (bindingMode === BindingModes.lockToTargetOnAssign) {
+    if (!state.assigned) {
+      state.assigned = true;
+      if (target.hasRotation) quat.copy(state.assignedRotation, target.rotation);
+      else quat.identity(state.assignedRotation);
+    }
+    return quat.copy(out, state.assignedRotation);
+  }
+
+  if (!target.hasRotation) return quat.identity(out);
+  quat.copy(out, target.rotation);
+
+  if (bindingMode === BindingModes.lockToTarget) return out;
+
+  vec3.transformQuat(scratchForward, forwardAxis, out);
+  if (bindingMode === BindingModes.lockToTargetWithWorldUp) scratchForward[1] = 0;
+  if (vec3.squaredLength(scratchForward) < 1e-10) return out; // degenerate (straight up/down): keep the full rotation
+  vec3.normalize(scratchForward, scratchForward);
+  mat4.targetTo(scratchLookMatrix, origin, scratchForward, worldUp);
+  return quat.fromMat4(out, scratchLookMatrix);
+}
+
+const scratchGoal: Vec3 = [0, 0, 0];
+const scratchReference: Quat = [0, 0, 0, 1];
+const scratchWorldOffset: Vec3 = [0, 0, 0];
+const scratchPreviousOffset: Vec3 = [0, 0, 0];
+const scratchRotation: Quat = [0, 0, 0, 1];
+const scratchDelta: Vec3 = [0, 0, 0];
+const scratchStep: Vec3 = [0, 0, 0];
+const scratchFrame: Quat = [0, 0, 0, 1];
+const scratchFrameInverse: Quat = [0, 0, 0, 1];
+
+/**
+ * Damps the tracked point toward the target position plus `targetOffset`, per axis of the camera `offset`'s frame.
+ * When `offset` changes, the tracked point turns with it around the target, so moving the camera is never damped.
+ * Writes the tracked point to `out` and the reference orientation to `outOrientation`.
+ */
+export function trackTarget(
+  out: Vec3,
+  outOrientation: Quat,
+  state: TrackerState,
+  params: TrackerParams,
+  target: TargetPose,
+  offset: Vec3,
+  targetOffset: Vec3,
+  dt: number,
+): Vec3 {
+  referenceOrientation(scratchReference, state, params.bindingMode, target);
+  if (state.hasPrevious) {
+    damping.dampQuaternion(state.rotationDamper, state.orientation, scratchReference, params.rotationDamping, dt);
+  } else {
+    quat.copy(state.orientation, scratchReference);
+    start(state.rotationDamper);
+  }
+  quat.copy(outOrientation, state.orientation);
+  vec3.add(scratchGoal, target.position, vec3.transformQuat(scratchGoal, targetOffset, outOrientation));
+  vec3.transformQuat(scratchWorldOffset, offset, outOrientation);
+
+  if (state.hasPrevious && !vec3.exactEquals(state.previousOffset, offset)) {
+    vec3.transformQuat(scratchPreviousOffset, state.previousOffset, outOrientation);
+    safeFromToRotation(scratchRotation, scratchPreviousOffset, scratchWorldOffset, worldUp);
+    vec3.subtract(scratchDelta, state.trackedPoint, scratchGoal);
+    vec3.add(state.trackedPoint, scratchGoal, vec3.transformQuat(scratchDelta, scratchDelta, scratchRotation));
+  }
+  vec3.copy(state.previousOffset, offset);
+  state.hasPrevious = true;
+
+  vec3.cross(scratchDelta, scratchWorldOffset, worldUp);
+  if (vec3.squaredLength(scratchDelta) < 1e-10) quat.copy(scratchFrame, outOrientation);
+  else quat.fromMat4(scratchFrame, mat4.targetTo(scratchLookMatrix, origin, scratchWorldOffset, worldUp));
+  quat.conjugate(scratchFrameInverse, scratchFrame);
+
+  vec3.subtract(scratchDelta, scratchGoal, state.trackedPoint);
+  vec3.transformQuat(scratchDelta, scratchDelta, scratchFrameInverse);
+  vec3.zero(scratchStep);
+  damping.dampVector3(state.damper, scratchStep, scratchDelta, params.damping, dt, params.maxSpeed);
+  vec3.add(state.trackedPoint, state.trackedPoint, vec3.transformQuat(scratchStep, scratchStep, scratchFrame));
+  return vec3.copy(out, state.trackedPoint);
+}
diff --git a/src/react/body/Body.ts b/src/react/body/Body.ts
index 4e8c0a5..482bcc6 100644
--- a/src/react/body/Body.ts
+++ b/src/react/body/Body.ts
@@ -1,5 +1,6 @@
 import { Follow } from './Follow';
 import { HardLockToTarget } from './HardLockToTarget';
+import { OrbitFollow } from './OrbitFollow';
 import { PositionComposer } from './PositionComposer';
 
 /** Body components control a ``'s position. Use at most one per camera. */
@@ -7,4 +8,5 @@ export const Body = {
   HardLockToTarget,
   Follow,
   PositionComposer,
+  OrbitFollow,
 };
diff --git a/src/react/body/OrbitFollow.tsx b/src/react/body/OrbitFollow.tsx
new file mode 100644
index 0000000..e6059d3
--- /dev/null
+++ b/src/react/body/OrbitFollow.tsx
@@ -0,0 +1,96 @@
+import { useFrame } from '@react-three/fiber';
+import { useEffect, useImperativeHandle, useState, type ReactNode, type Ref } from 'react';
+
+import * as orbitFollow from '../../core/body/orbitFollow';
+import * as inputAxis from '../../core/input/axis';
+import type { InputAxisParams } from '../../core/input/axis';
+import type { InputAxis } from '../../core/input/InputAxis';
+import { withDefaults } from '../../core/params';
+
+import { OrbitFollowBodyThree, type OrbitFollowThreeOptions } from '../../three/body/OrbitFollowBodyThree';
+import { OrbitFollowHelperThree } from '../../three/body/OrbitFollowHelperThree';
+import { resolveVec3 } from '../../three/resolve/resolveVector3';
+import type { Target } from '../../three/resolve/Target';
+
+import { useVirtualCamera } from '../VirtualCameraContext';
+
+import { InputAxisOwnerContext } from '../input/InputAxisOwnerContext';
+
+/** Settings of one orbit axis. It starts at `center`, then input drives its value. */
+export type OrbitFollowAxisSettings = Partial>;
+
+export type OrbitFollowProps = OrbitFollowThreeOptions & {
+  /** Target to orbit. Unresolved targets are ignored. */
+  target?: Target;
+  /** Angle around the target, in degrees. */
+  horizontal?: OrbitFollowAxisSettings;
+  /** Elevation above the target in degrees, or from the bottom to the top ring for `threeRing`. */
+  vertical?: OrbitFollowAxisSettings;
+  /** Natural log of the radius scale. */
+  radial?: OrbitFollowAxisSettings;
+  /** `horizontal.autoNormalize`: keeps it inside its range after each drag. */
+  autoNormalize?: boolean;
+  /** Draws the orbit in the scene. */
+  debug?: boolean;
+  ref?: Ref;
+  /** Nested `` picks up `horizontal`/`vertical`/`radial` without an explicit `target`. */
+  children?: ReactNode;
+};
+
+function applyAxis(axis: InputAxis, defaults: Partial, settings: OrbitFollowAxisSettings | undefined) {
+  const params = withDefaults(inputAxis.createParams(defaults), settings);
+  params.value = axis.value;
+  Object.assign(axis, params);
+}
+
+function applyAxes(body: OrbitFollowBodyThree, { horizontal, vertical, radial, autoNormalize }: OrbitFollowProps) {
+  const defaults = orbitFollow.createAxisSettings();
+  defaults.horizontal.autoNormalize = autoNormalize;
+  applyAxis(body.horizontal, defaults.horizontal, horizontal);
+  applyAxis(body.vertical, defaults.vertical, vertical);
+  applyAxis(body.radial, defaults.radial, radial);
+}
+
+/** Orbits a target, driven by the `horizontal`, `vertical` and `radial` axes. */
+export function OrbitFollow({
+  target,
+  targetOffset,
+  horizontal,
+  vertical,
+  radial,
+  autoNormalize = false,
+  debug = false,
+  ref,
+  children,
+  ...settings
+}: OrbitFollowProps) {
+  const camera = useVirtualCamera();
+  const { targetOffset: defaultTargetOffset, ...params } = orbitFollow.createParams(settings);
+  const [body] = useState(() => {
+    const created = new OrbitFollowBodyThree(target, params);
+    applyAxes(created, { horizontal, vertical, radial, autoNormalize });
+    for (const axis of [created.horizontal, created.vertical, created.radial]) axis.setValue(axis.center);
+    return created;
+  });
+  body.target = target;
+  Object.assign(body, params);
+  resolveVec3(body.targetOffset, targetOffset ?? defaultTargetOffset);
+  applyAxes(body, { horizontal, vertical, radial, autoNormalize });
+
+  useImperativeHandle(ref, () => body, [body]);
+  useEffect(() => camera.setBody(body), [camera, body]);
+
+  return (
+    
+      {children}
+      {debug && }
+    
+  );
+}
+
+function OrbitDebug({ body }: { body: OrbitFollowBodyThree }) {
+  const [helper] = useState(() => new OrbitFollowHelperThree());
+  useEffect(() => () => helper.dispose(), [helper]);
+  useFrame(() => helper.sync(body));
+  return ;
+}
diff --git a/src/react/index.ts b/src/react/index.ts
index 06be11f..c03c212 100644
--- a/src/react/index.ts
+++ b/src/react/index.ts
@@ -21,6 +21,7 @@ export {
 export { Body } from './body/Body';
 export { Follow, type FollowProps } from './body/Follow';
 export { HardLockToTarget, type HardLockToTargetProps } from './body/HardLockToTarget';
+export { OrbitFollow, type OrbitFollowAxisSettings, type OrbitFollowProps } from './body/OrbitFollow';
 export { PositionComposer, type PositionComposerProps } from './body/PositionComposer';
 
 export { Aim } from './aim/Aim';
diff --git a/src/three/body/OrbitFollowBodyThree.ts b/src/three/body/OrbitFollowBodyThree.ts
new file mode 100644
index 0000000..1800c2d
--- /dev/null
+++ b/src/three/body/OrbitFollowBodyThree.ts
@@ -0,0 +1,30 @@
+import * as orbitFollow from '../../core/body/orbitFollow';
+import * as targetPose from '../../core/TargetPose';
+import { OrbitFollowBody, type OrbitFollowOptions } from '../../core/body/OrbitFollowBody';
+import type { TargetPose } from '../../core/TargetPose';
+
+import { readTargetPose } from '../readTargetPose';
+
+import { optionalVec3, type Vector3Like } from '../resolve/resolveVector3';
+import type { Target } from '../resolve/Target';
+import type { TargetSlot } from '../resolve/TargetRegistry';
+
+export type OrbitFollowThreeOptions = Omit & {
+  /** Center of the orbit relative to the target, rotated according to `bindingMode`. */
+  targetOffset?: Vector3Like;
+};
+
+/** Orbits an `Object3D`, ref or fixed point, driven by `horizontal`, `vertical` and `radial`. */
+export class OrbitFollowBodyThree extends OrbitFollowBody {
+  targetSlot: TargetSlot | null = null;
+  private readonly pose = targetPose.create();
+
+  constructor(target: Target, { targetOffset, ...options }: OrbitFollowThreeOptions = {}) {
+    super(target, { ...options, targetOffset: optionalVec3(targetOffset) });
+  }
+
+  protected override readTarget(): TargetPose | null {
+    const withRotation = orbitFollow.needsTargetRotation(this.state, this);
+    return readTargetPose(this.pose, this.target, this.targetSlot, withRotation) ? this.pose : null;
+  }
+}
diff --git a/src/three/body/OrbitFollowHelperThree.ts b/src/three/body/OrbitFollowHelperThree.ts
new file mode 100644
index 0000000..30926cc
--- /dev/null
+++ b/src/three/body/OrbitFollowHelperThree.ts
@@ -0,0 +1,80 @@
+import type { Vec3 } from 'math';
+import { BufferAttribute, BufferGeometry, Color, LineBasicMaterial, LineSegments } from 'three';
+
+import * as orbitFollow from '../../core/body/orbitFollow';
+import type { OrbitFollowBody } from '../../core/body/OrbitFollowBody';
+
+const circleSegments = 64;
+const arcSegments = 32;
+const maxVertices = (circleSegments * 4 + arcSegments) * 2;
+const defaultRange: [number, number] = [-90, 90];
+
+const previous: Vec3 = [0, 0, 0];
+const next: Vec3 = [0, 0, 0];
+
+/**
+ * Draws an `OrbitFollowBody`'s orbit around its tracked point: the circle the camera moves along with `horizontal`,
+ * the arc it moves along with `vertical`, and for `threeRing` also the three rings.
+ */
+export class OrbitFollowHelperThree extends LineSegments {
+  readonly colors = { horizontal: new Color('#ff9f1c'), vertical: new Color('#2ec4f1'), rings: new Color('#9a9aa8') };
+  private readonly positions = new Float32Array(maxVertices * 3);
+  private readonly vertexColors = new Float32Array(maxVertices * 3);
+  private vertexCount = 0;
+
+  constructor() {
+    super(new BufferGeometry(), new LineBasicMaterial({ vertexColors: true, toneMapped: false }));
+    this.geometry.setAttribute('position', new BufferAttribute(this.positions, 3));
+    this.geometry.setAttribute('color', new BufferAttribute(this.vertexColors, 3));
+    this.frustumCulled = false;
+  }
+
+  /** Redraws the orbit from `body`'s last update. */
+  sync(body: OrbitFollowBody): void {
+    const { horizontal, vertical } = body.state;
+    const [min, max] = vertical.range ?? defaultRange;
+    this.vertexCount = 0;
+
+    if (body.orbitStyle === 'threeRing') {
+      this.circle(body, min, this.colors.rings);
+      this.circle(body, (min + max) / 2, this.colors.rings);
+      this.circle(body, max, this.colors.rings);
+    }
+    this.circle(body, vertical.value, this.colors.horizontal);
+    orbitFollow.point(previous, body.state, body, horizontal.value, min);
+    for (let i = 1; i <= arcSegments; i++) {
+      orbitFollow.point(next, body.state, body, horizontal.value, min + ((max - min) * i) / arcSegments);
+      this.segment(this.colors.vertical);
+    }
+
+    this.geometry.getAttribute('position').needsUpdate = true;
+    this.geometry.getAttribute('color').needsUpdate = true;
+    this.geometry.setDrawRange(0, this.vertexCount);
+  }
+
+  dispose(): void {
+    this.geometry.dispose();
+    this.material.dispose();
+  }
+
+  private circle(body: OrbitFollowBody, vertical: number, color: Color): void {
+    orbitFollow.point(previous, body.state, body, 0, vertical);
+    for (let i = 1; i <= circleSegments; i++) {
+      orbitFollow.point(next, body.state, body, (360 * i) / circleSegments, vertical);
+      this.segment(color);
+    }
+  }
+
+  /** Adds the segment from `previous` to `next`, then moves `previous` to `next`. */
+  private segment(color: Color): void {
+    const offset = this.vertexCount * 3;
+    this.positions.set(previous, offset);
+    this.positions.set(next, offset + 3);
+    color.toArray(this.vertexColors, offset);
+    color.toArray(this.vertexColors, offset + 3);
+    this.vertexCount += 2;
+    previous[0] = next[0];
+    previous[1] = next[1];
+    previous[2] = next[2];
+  }
+}
diff --git a/src/three/index.ts b/src/three/index.ts
index 62884ed..d147850 100644
--- a/src/three/index.ts
+++ b/src/three/index.ts
@@ -25,6 +25,8 @@ export { Vector3Damper } from './damping/Vector3Damper';
 
 export { FollowBodyThree, type FollowThreeOptions } from './body/FollowBodyThree';
 export { HardLockToTargetBodyThree, type HardLockToTargetOptions } from './body/HardLockToTargetBodyThree';
+export { OrbitFollowBodyThree, type OrbitFollowThreeOptions } from './body/OrbitFollowBodyThree';
+export { OrbitFollowHelperThree } from './body/OrbitFollowHelperThree';
 export { PositionComposerBodyThree, type PositionComposerThreeOptions } from './body/PositionComposerBodyThree';
 
 export { HardLookAtAimThree } from './aim/HardLookAtAimThree';
diff --git a/test/core/CameraState.test.ts b/test/core/CameraState.test.ts
index 07519a4..e788e1d 100644
--- a/test/core/CameraState.test.ts
+++ b/test/core/CameraState.test.ts
@@ -18,6 +18,7 @@ describe('cameraState.copy', () => {
       lookAtTarget: [7, 8, 9],
       hasLookAtTarget: true,
       referenceUp: vec3.normalize(vec3.create(), [0.1, 0.9, 0.2]),
+      rotationDampingBypass: quat.normalize(quat.create(), [0, 0.3, 0, 0.9]),
     };
     const out = cameraState.create();
     const outPosition = out.position;
@@ -39,6 +40,7 @@ describe('cameraState.copy', () => {
     expect(vec3.exactEquals(out.lookAtTarget, source.lookAtTarget)).toBe(true);
     expect(out.hasLookAtTarget).toBe(true);
     expect(vec3.exactEquals(out.referenceUp, source.referenceUp)).toBe(true);
+    expect(vec4.exactEquals(out.rotationDampingBypass, source.rotationDampingBypass)).toBe(true);
   });
 
   it('stays unchanged after the source is mutated — the actual "freeze" guarantee', () => {
@@ -54,6 +56,7 @@ describe('cameraState.copy', () => {
       lookAtTarget: [7, 8, 9],
       hasLookAtTarget: true,
       referenceUp: [0, 1, 0],
+      rotationDampingBypass: [0, 0, 0, 1],
     };
     const out = cameraState.create();
     cameraState.copy(out, source);
diff --git a/test/core/aim/lookRotation.test.ts b/test/core/aim/lookRotation.test.ts
new file mode 100644
index 0000000..c78afd6
--- /dev/null
+++ b/test/core/aim/lookRotation.test.ts
@@ -0,0 +1,31 @@
+import { quat, vec3, type Quat, type Vec3 } from 'math';
+import { describe, expect, it } from 'vitest';
+
+import { lookRotation } from '../../../src/core/aim/lookRotation';
+
+import { forwardDot } from '../mathHelpers';
+
+const up: Vec3 = [0, 1, 0];
+const screenUp = (rotation: Quat) => vec3.transformQuat(vec3.create(), up, rotation);
+
+describe('lookRotation', () => {
+  it('looks straight down with a unit rotation, keeping the previous screen top', () => {
+    const position: Vec3 = [0, 10, 0];
+    const target: Vec3 = [0, 0, 0];
+    const nearPole = lookRotation(quat.create(), [0, 10, 0.01], target, up, quat.create());
+    const atPole = lookRotation(quat.create(), position, target, up, nearPole);
+
+    expect(quat.length(atPole)).toBeCloseTo(1, 9);
+    expect(forwardDot(atPole, position, target)).toBeCloseTo(1, 9);
+    expect(vec3.dot(screenUp(atPole), screenUp(nearPole))).toBeGreaterThan(0.999);
+  });
+
+  it('falls back to the previous forward when the previous top is parallel too', () => {
+    const position: Vec3 = [0, 10, 0];
+    const atPole = lookRotation(quat.create(), position, [0, 0, 0], up, quat.create());
+
+    expect(quat.length(atPole)).toBeCloseTo(1, 9);
+    expect(forwardDot(atPole, position, [0, 0, 0])).toBeCloseTo(1, 9);
+    expect(vec3.dot(screenUp(atPole), [0, 0, -1])).toBeCloseTo(1, 9);
+  });
+});
diff --git a/test/core/blend/lerpCameraState.test.ts b/test/core/blend/lerpCameraState.test.ts
index 1d580e2..2b41492 100644
--- a/test/core/blend/lerpCameraState.test.ts
+++ b/test/core/blend/lerpCameraState.test.ts
@@ -20,6 +20,7 @@ function makeState(overrides: Partial = {}): CameraState {
     lookAtTarget: [0, 0, 0],
     hasLookAtTarget: false,
     referenceUp: [0, 1, 0],
+    rotationDampingBypass: [0, 0, 0, 1],
     ...overrides,
   };
 }
diff --git a/test/core/body/OrbitFollowBody.test.ts b/test/core/body/OrbitFollowBody.test.ts
new file mode 100644
index 0000000..2241b61
--- /dev/null
+++ b/test/core/body/OrbitFollowBody.test.ts
@@ -0,0 +1,47 @@
+import { quat, vec3, type Vec3 } from 'math';
+import { describe, expect, it } from 'vitest';
+
+import * as cameraState from '../../../src/core/CameraState';
+import * as targetPose from '../../../src/core/TargetPose';
+import { BindingModes } from '../../../src/core/body/BindingModes';
+import { OrbitFollowBody } from '../../../src/core/body/OrbitFollowBody';
+import { VirtualCamera } from '../../../src/core/VirtualCamera';
+
+import { yaw } from '../mathHelpers';
+
+const expectVec3 = (actual: Vec3, expected: Vec3) => {
+  for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 9);
+};
+
+describe('OrbitFollowBody', () => {
+  it('exposes its axes to the camera it is set on', () => {
+    const body = new OrbitFollowBody(targetPose.create());
+    const camera = new VirtualCamera('orbit');
+    camera.setBody(body);
+    expect(camera.inputAxes.horizontal).toBe(body.horizontal);
+    expect(camera.inputAxes.vertical).toBe(body.vertical);
+    expect(camera.inputAxes.radial).toBe(body.radial);
+  });
+
+  it('captures the target rotation for lockToTargetOnAssign on a new target and on activation', () => {
+    const first = targetPose.create();
+    first.hasRotation = true;
+    const body = new OrbitFollowBody(first, { bindingMode: BindingModes.lockToTargetOnAssign });
+    const out = cameraState.create();
+    body.update(out, 0.016, false);
+    expectVec3(out.position, [0, 0, 10]);
+
+    const second = targetPose.create();
+    second.hasRotation = true;
+    quat.copy(second.rotation, yaw(90));
+    body.target = second;
+    body.update(out, 0.016, false);
+    expectVec3(out.position, vec3.transformQuat(vec3.create(), [0, 0, 10], yaw(90)));
+
+    quat.identity(second.rotation);
+    body.update(out, 0.016, false);
+    expectVec3(out.position, vec3.transformQuat(vec3.create(), [0, 0, 10], yaw(90)));
+    body.update(out, 0.016, true);
+    expectVec3(out.position, [0, 0, 10]);
+  });
+});
diff --git a/test/core/body/orbitFollow.test.ts b/test/core/body/orbitFollow.test.ts
new file mode 100644
index 0000000..890fbae
--- /dev/null
+++ b/test/core/body/orbitFollow.test.ts
@@ -0,0 +1,396 @@
+import { quat, vec3, type Vec3 } from 'math';
+import { describe, expect, it } from 'vitest';
+
+import * as hardLookAt from '../../../src/core/aim/hardLookAt';
+import * as panTilt from '../../../src/core/aim/panTilt';
+import * as rotationComposer from '../../../src/core/aim/rotationComposer';
+import * as orbitFollow from '../../../src/core/body/orbitFollow';
+import * as cameraState from '../../../src/core/CameraState';
+import * as targetPose from '../../../src/core/TargetPose';
+import { BindingModes } from '../../../src/core/body/BindingModes';
+
+import { angleBetween, forwardDot, yaw } from '../mathHelpers';
+
+function setup() {
+  const state = orbitFollow.createState();
+  const params = orbitFollow.createParams();
+  const target = targetPose.create();
+  const out = cameraState.create();
+  const step = (dt = 0.016) => orbitFollow.update(out, state, params, target, dt, false);
+  return { state, params, target, out, step };
+}
+
+function place(horizontal: number, vertical: number, radial = 0) {
+  const scene = setup();
+  scene.state.horizontal.setValue(horizontal);
+  scene.state.vertical.setValue(vertical);
+  scene.state.radial.setValue(radial);
+  scene.step();
+  return scene;
+}
+
+const expectVec3 = (actual: Vec3, expected: Vec3) => {
+  for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 9);
+};
+
+describe('orbitFollow.update', () => {
+  it('places the camera on a sphere of `radius` around the target', () => {
+    expectVec3(place(0, 0).out.position, [0, 0, 10]);
+    expectVec3(place(90, 0).out.position, [-10, 0, 0]);
+    expectVec3(place(0, 30).out.position, [0, 5, 10 * Math.cos(Math.PI / 6)]);
+  });
+
+  it('turns the view the same way as PanTilt for the same axis values', () => {
+    for (const [horizontal, vertical] of [
+      [40, 20],
+      [-120, -5],
+      [170, 44],
+    ]) {
+      const { out } = place(horizontal, vertical);
+      const aim = panTilt.createState();
+      aim.pan.setValue(horizontal);
+      aim.tilt.setValue(vertical);
+      const view = cameraState.create();
+      panTilt.update(view, aim, null, 0.016);
+      expect(forwardDot(view.quaternion, out.position, [0, 0, 0])).toBeCloseTo(1, 9);
+    }
+  });
+
+  it('keeps turning the view with horizontal at the poles', () => {
+    for (const vertical of [90, -90]) {
+      const views = [0, 90].map((horizontal) => {
+        const { out } = place(horizontal, vertical);
+        hardLookAt.update(out, [0, 0, 0]);
+        expect(forwardDot(out.quaternion, out.position, [0, 0, 0])).toBeCloseTo(1, 6);
+        return out.quaternion;
+      });
+      expect(angleBetween(views[0], views[1])).toBeCloseTo(Math.PI / 2, 3);
+    }
+  });
+
+  it('scales the radius by exp(radial)', () => {
+    expectVec3(place(0, 0, Math.log(2)).out.position, [0, 0, 20]);
+    expectVec3(place(0, 0, Math.log(0.5)).out.position, [0, 0, 5]);
+  });
+
+  it('writes the tracked point as the body target', () => {
+    const { target, out, step } = setup();
+    vec3.set(target.position, 1, 2, 3);
+    step();
+    expectVec3(out.target, [1, 2, 3]);
+    expect(out.hasTarget).toBe(true);
+  });
+
+  it('measures the orbit and the target offset in the binding frame', () => {
+    const { params, target, out, step } = setup();
+    params.bindingMode = BindingModes.lockToTarget;
+    params.targetOffset = [0, 1, 0];
+    target.hasRotation = true;
+    quat.setAxisAngle(target.rotation, [0, 0, 1], Math.PI / 2);
+    step();
+
+    expectVec3(out.target, [-1, 0, 0]);
+    expectVec3(out.position, [-1, 0, 10]);
+    expectVec3(out.referenceUp, [-1, 0, 0]);
+
+    params.bindingMode = BindingModes.worldSpace;
+    quat.copy(target.rotation, yaw(90));
+    step();
+    expectVec3(out.target, [0, 1, 0]);
+    expectVec3(out.position, [0, 1, 10]);
+  });
+
+  it('eases a change of radius with radial.damping, and snaps without it', () => {
+    const { state, params, out, step } = setup();
+    state.radial.damping = 0.3;
+    step();
+    expectVec3(out.position, [0, 0, 10]);
+
+    params.radius = 20;
+    expect(step()).toBe(true);
+    expect(out.position[2]).toBeGreaterThan(10);
+    expect(out.position[2]).toBeLessThan(20);
+    for (let i = 0; i < 300; i++) step();
+    expectVec3(out.position, [0, 0, 20]);
+    expect(step()).toBe(false);
+
+    state.radial.damping = 0;
+    params.radius = 5;
+    step();
+    expectVec3(out.position, [0, 0, 5]);
+  });
+
+  it('primes the axes from a position, on the same ray at the current radius', () => {
+    const { state, target, out, step } = setup();
+    vec3.set(target.position, 1, 0, 0);
+    orbitFollow.prime(state, [1 - 3, 3, 0]);
+    step();
+    expect(state.horizontal.value).toBeCloseTo(90, 9);
+    expect(state.vertical.value).toBeCloseTo(45, 9);
+    const r = 10 / Math.SQRT2;
+    expectVec3(out.position, [1 - r, r, 0]);
+  });
+
+  it('primes relative to the binding frame and the target offset', () => {
+    const { state, params, target, out, step } = setup();
+    params.bindingMode = BindingModes.lockToTarget;
+    params.targetOffset = [0, 1, 0];
+    target.hasRotation = true;
+    quat.copy(target.rotation, yaw(90));
+    orbitFollow.prime(state, [5, 1, 0]);
+    step();
+    expect(state.horizontal.value).toBeCloseTo(0, 9);
+    expect(state.vertical.value).toBeCloseTo(0, 9);
+    expectVec3(out.position, [10, 1, 0]);
+  });
+
+  it('waits with priming until there is a target', () => {
+    const { state, params, target, out, step } = setup();
+    orbitFollow.prime(state, [0, 0, -5]);
+    orbitFollow.update(out, state, params, null, 0.016, false);
+    expect(state.horizontal.value).toBe(0);
+    vec3.set(target.position, 0, 0, 0);
+    step();
+    expect(Math.abs(state.horizontal.value)).toBeCloseTo(180, 9);
+  });
+
+  it('restarts the wait for recentering on activation', () => {
+    const { state, params, target, out } = setup();
+    state.horizontal.recentering = { enabled: true, wait: 0.5, time: 0.2 };
+    state.horizontal.setValue(30);
+    state.horizontal.idleTime = 10;
+    orbitFollow.update(out, state, params, target, 0.016, true);
+    expect(state.horizontal.value).toBe(30);
+  });
+
+  it('leaves `out` as is without a target', () => {
+    const { state, params, out } = setup();
+    vec3.set(out.position, 7, 7, 7);
+    orbitFollow.update(out, state, params, null, 0.016, false);
+    expectVec3(out.position, [7, 7, 7]);
+    expect(out.hasTarget).toBe(false);
+  });
+
+  it('reports motion while an axis eases or waits to recenter', () => {
+    const { state, step } = setup();
+    expect(step()).toBe(false);
+
+    state.horizontal.damping = 0.2;
+    state.horizontal.recentering = { enabled: true, wait: 2, time: 0.2 };
+    state.horizontal.applyDelta(30);
+    expect(step()).toBe(true);
+    for (let i = 0; i < 60; i++) step();
+    expect(state.horizontal.value).toBeGreaterThan(29);
+    expect(step()).toBe(true);
+    for (let i = 0; i < 400; i++) step();
+    expect(state.horizontal.value).toBe(0);
+    expect(step()).toBe(false);
+  });
+});
+
+describe('orbitFollow recentering', () => {
+  function recentering(times: { horizontal: number; vertical: number }) {
+    const scene = setup();
+    const { state } = scene;
+    state.horizontal.recentering = { enabled: true, wait: 0.5, time: times.horizontal };
+    state.vertical.recentering = { enabled: true, wait: 0.5, time: times.vertical };
+    state.vertical.setValue(40);
+    return scene;
+  }
+
+  it('holds every axis with the same time while one of them gets input, then recenters them together', () => {
+    const { state, step } = recentering({ horizontal: 0.3, vertical: 0.3 });
+    for (let i = 0; i < 120; i++) {
+      state.horizontal.applyDelta(0.1);
+      step();
+    }
+    expect(state.vertical.value).toBe(40);
+
+    for (let i = 0; i < 600; i++) step();
+    expect(state.vertical.value).toBeCloseTo(0, 6);
+    expect(state.horizontal.value).toBeCloseTo(0, 6);
+  });
+
+  it('recenters an axis with another time while the other gets input', () => {
+    const { state, step } = recentering({ horizontal: 0.3, vertical: 0.4 });
+    for (let i = 0; i < 300; i++) {
+      state.horizontal.applyDelta(0.1);
+      step();
+    }
+    expect(state.vertical.value).toBeCloseTo(0, 6);
+  });
+
+  it("recenters horizontal behind the target's forward with trackingTarget", () => {
+    const { state, target, out, step } = recentering({ horizontal: 0.2, vertical: 0.2 });
+    state.vertical.recentering = { enabled: false, wait: 0.5, time: 0.2 };
+    state.vertical.setValue(0);
+    target.hasRotation = true;
+    quat.copy(target.rotation, yaw(90));
+    for (let i = 0; i < 600; i++) step();
+    expect(state.horizontal.value).toBeCloseTo(-90, 6);
+    expectVec3(out.position, [10, 0, 0]);
+  });
+
+  it('recenters to the axis center with axisCenter', () => {
+    const { state, params, target, step } = recentering({ horizontal: 0.2, vertical: 0.2 });
+    params.recenteringTarget = 'axisCenter';
+    target.hasRotation = true;
+    quat.copy(target.rotation, yaw(90));
+    state.horizontal.setValue(50);
+    for (let i = 0; i < 600; i++) step();
+    expect(state.horizontal.value).toBeCloseTo(0, 6);
+  });
+
+  it('reads the target rotation for trackingTarget only while horizontal recenters', () => {
+    const { state, params } = setup();
+    expect(orbitFollow.needsTargetRotation(state, params)).toBe(false);
+    state.horizontal.recentering = { enabled: true, wait: 1, time: 1 };
+    expect(orbitFollow.needsTargetRotation(state, params)).toBe(true);
+    params.recenteringTarget = 'axisCenter';
+    expect(orbitFollow.needsTargetRotation(state, params)).toBe(false);
+  });
+});
+
+describe('orbitFollow rotation damping bypass', () => {
+  function orbitWithComposer() {
+    const scene = setup();
+    const composerState = rotationComposer.createState();
+    const composerParams = rotationComposer.createParams({ damping: 0.5 });
+    const frame = (justActivated = false) => {
+      orbitFollow.update(scene.out, scene.state, scene.params, scene.target, 0.016, justActivated);
+      rotationComposer.update(scene.out, composerState, composerParams, scene.target, 0.016, justActivated);
+    };
+    return { ...scene, frame };
+  }
+
+  it('keeps the target centered for a damped Aim while the orbit turns', () => {
+    const { state, out, frame } = orbitWithComposer();
+    frame(true);
+    for (let i = 0; i < 60; i++) {
+      state.horizontal.applyDelta(3);
+      state.vertical.applyDelta(0.5);
+      frame();
+      expect(forwardDot(out.quaternion, out.position, [0, 0, 0])).toBeCloseTo(1, 9);
+    }
+  });
+
+  it('is the turn of the orbit between frames, and identity on activation and without a target', () => {
+    const { state, params, out, step } = setup();
+    orbitFollow.update(out, state, orbitFollow.createParams(), targetPose.create(), 0.016, true);
+    expect(out.rotationDampingBypass).toEqual([0, 0, 0, 1]);
+
+    state.horizontal.applyDelta(30);
+    step();
+    expect(angleBetween(out.rotationDampingBypass, yaw(-30))).toBeCloseTo(0, 9);
+
+    orbitFollow.update(out, state, params, null, 0.016, false);
+    expect(out.rotationDampingBypass).toEqual([0, 0, 0, 1]);
+  });
+});
+
+describe('orbitFollow threeRing', () => {
+  function rings(horizontal: number, vertical: number, radial = 0) {
+    const scene = setup();
+    scene.params.orbitStyle = 'threeRing';
+    scene.state.horizontal.setValue(horizontal);
+    scene.state.vertical.setValue(vertical);
+    scene.state.radial.setValue(radial);
+    scene.step();
+    return scene;
+  }
+
+  it("runs from the bottom ring at vertical's minimum to the top ring at its maximum", () => {
+    expectVec3(rings(0, -90).out.position, [0, -10, 10]);
+    expectVec3(rings(0, 0).out.position, [0, 0, 10]);
+    expectVec3(rings(0, 90).out.position, [0, 10, 10]);
+  });
+
+  it('is a plain cylinder of the default radius by default, starting where the sphere starts', () => {
+    for (const vertical of [-60, -20, 30, 75]) {
+      const { position } = rings(0, vertical).out;
+      expect(Math.hypot(position[0], position[2])).toBeCloseTo(10, 9);
+    }
+    expectVec3(rings(0, 0).out.position, place(0, 0).out.position);
+  });
+
+  it('turns around the target with horizontal, the same way as the sphere', () => {
+    expectVec3(rings(90, 0).out.position, [-10, 0, 0]);
+  });
+
+  it('scales the whole surface by exp(radial)', () => {
+    expectVec3(rings(0, 90, Math.log(2)).out.position, [0, 20, 20]);
+  });
+
+  it('primes both axes from a position on the surface', () => {
+    const { out } = rings(30, 45);
+    const position = vec3.clone(out.position);
+
+    const { state, params, step } = setup();
+    params.orbitStyle = 'threeRing';
+    orbitFollow.prime(state, position);
+    step();
+    expect(state.horizontal.value).toBeCloseTo(30, 6);
+    expect(state.vertical.value).toBeCloseTo(45, 4);
+  });
+});
+
+describe('orbitFollow.point', () => {
+  it('is where the camera is for the current axis values, for both styles', () => {
+    for (const orbitStyle of ['sphere', 'threeRing'] as const) {
+      const { state, params, target, out, step } = setup();
+      params.orbitStyle = orbitStyle;
+      params.bindingMode = BindingModes.lockToTarget;
+      params.damping = 0.5;
+      target.hasRotation = true;
+      quat.copy(target.rotation, yaw(40));
+      step();
+      vec3.set(target.position, 3, 1, -2);
+      state.horizontal.applyDelta(25);
+      state.vertical.applyDelta(30);
+      step();
+      const position = orbitFollow.point(vec3.create(), state, params, state.horizontal.value, state.vertical.value);
+      expectVec3(position, out.position);
+    }
+  });
+});
+
+describe('orbitFollow.setFromPosition and setFromRotation', () => {
+  const settle = (step: () => unknown) => {
+    for (let i = 0; i < 600; i++) step();
+  };
+
+  it("eases the camera toward a position's direction, keeping the zoom", () => {
+    const { state, params, target, out, step } = setup();
+    state.horizontal.damping = 0.3;
+    state.radial.setValue(Math.log(2));
+    step();
+    orbitFollow.setFromPosition(state, params, target, [-3, 3, 0]);
+    step();
+    expect(state.horizontal.value).toBeGreaterThan(0);
+    expect(state.horizontal.value).toBeLessThan(90);
+
+    settle(step);
+    expect(state.horizontal.value).toBeCloseTo(90, 6);
+    expect(state.vertical.value).toBeCloseTo(45, 6);
+    expect(vec3.length(out.position)).toBeCloseTo(20, 6);
+  });
+
+  it('takes the short way around', () => {
+    const { state, params, target, step } = setup();
+    state.horizontal.setValue(170);
+    // horizontal -170 puts the camera along yaw(170), so the shortest way from 170 is +20.
+    orbitFollow.setFromPosition(state, params, target, vec3.transformQuat(vec3.create(), [0, 0, 10], yaw(170)));
+    step();
+    expect(state.horizontal.rawValue).toBeCloseTo(190, 6);
+  });
+
+  it("puts the camera opposite the rotation's forward", () => {
+    const { state, params, target, out, step } = setup();
+    const lookDown = quat.setAxisAngle(quat.create(), [1, 0, 0], -Math.PI / 6);
+    orbitFollow.setFromRotation(state, params, target, quat.multiply(quat.create(), yaw(90), lookDown));
+    settle(step);
+    expect(state.horizontal.value).toBeCloseTo(-90, 6);
+    expect(state.vertical.value).toBeCloseTo(30, 6);
+    expect(out.position[0]).toBeGreaterThan(0);
+  });
+});
diff --git a/test/core/body/threeRing.test.ts b/test/core/body/threeRing.test.ts
new file mode 100644
index 0000000..a570c85
--- /dev/null
+++ b/test/core/body/threeRing.test.ts
@@ -0,0 +1,70 @@
+import { vec3, type Vec3 } from 'math';
+import { describe, expect, it } from 'vitest';
+
+import * as threeRing from '../../../src/core/body/threeRing';
+import type { Orbits } from '../../../src/core/body/threeRing';
+
+const rings = (): Orbits => ({
+  top: { height: 5, radius: 2 },
+  center: { height: 2.25, radius: 4 },
+  bottom: { height: 0.1, radius: 2.5 },
+});
+
+const at = (state: threeRing.ThreeRingState, settings: Orbits, t: number, curvature = 0.5): Vec3 =>
+  threeRing.point(vec3.create(), state, settings, curvature, t);
+
+const expectVec3 = (actual: Vec3, expected: Vec3) => {
+  for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 9);
+};
+
+describe('threeRing.point', () => {
+  it('passes through the bottom, center and top ring', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    expectVec3(at(state, settings, 0), [0, 0.1, 2.5]);
+    expectVec3(at(state, settings, 0.5), [0, 2.25, 4]);
+    expectVec3(at(state, settings, 1), [0, 5, 2]);
+  });
+
+  it('clamps t to the outer rings', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    expectVec3(at(state, settings, -1), [0, 0.1, 2.5]);
+    expectVec3(at(state, settings, 2), [0, 5, 2]);
+  });
+
+  it('turns smoothly through the center ring', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    const h = 1e-6;
+    const before = vec3.subtract(vec3.create(), at(state, settings, 0.5), at(state, settings, 0.5 - h));
+    const after = vec3.subtract(vec3.create(), at(state, settings, 0.5 + h), at(state, settings, 0.5));
+    expect(after[1] / h).toBeCloseTo(before[1] / h, 3);
+    expect(after[2] / h).toBeCloseTo(before[2] / h, 3);
+  });
+
+  it('bends between the rings with the curvature, keeping the rings in place', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    const loose = at(state, settings, 0.25, 0);
+    const taut = at(state, settings, 0.25, 1);
+    expect(vec3.distance(loose, taut)).toBeGreaterThan(1e-3);
+    expectVec3(at(state, settings, 0, 1), [0, 0.1, 2.5]);
+    expectVec3(at(state, settings, 0.5, 0), [0, 2.25, 4]);
+  });
+
+  it('limits the curvature to 0..1', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    expectVec3(at(state, settings, 0.25, 3), at(threeRing.createState(), settings, 0.25, 1));
+    expectVec3(at(state, settings, 0.25, -2), at(threeRing.createState(), settings, 0.25, 0));
+  });
+
+  it('rebuilds after the rings change', () => {
+    const state = threeRing.createState();
+    const settings = rings();
+    at(state, settings, 1);
+    settings.top.height = 8;
+    expectVec3(at(state, settings, 1), [0, 8, 2]);
+  });
+});
diff --git a/test/core/body/tracker.test.ts b/test/core/body/tracker.test.ts
new file mode 100644
index 0000000..031a194
--- /dev/null
+++ b/test/core/body/tracker.test.ts
@@ -0,0 +1,138 @@
+import { quat, vec3, type Vec3 } from 'math';
+import { describe, expect, it } from 'vitest';
+
+import * as tracker from '../../../src/core/body/tracker';
+import * as targetPose from '../../../src/core/TargetPose';
+import { BindingModes } from '../../../src/core/body/BindingModes';
+
+import { yaw } from '../mathHelpers';
+
+function setup(damping = 0) {
+  const state = tracker.createState();
+  const params: tracker.TrackerParams = {
+    bindingMode: BindingModes.worldSpace,
+    damping,
+    rotationDamping: 0,
+    maxSpeed: Infinity,
+  };
+  const target = targetPose.create();
+  const point: Vec3 = [0, 0, 0];
+  const orientation = quat.create();
+  const track = (offset: Vec3, dt = 0.016, targetOffset: Vec3 = [0, 0, 0]) =>
+    tracker.trackTarget(point, orientation, state, params, target, offset, targetOffset, dt);
+  return { state, params, target, point, orientation, track };
+}
+
+const expectVec3 = (actual: Vec3, expected: Vec3) => {
+  for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 9);
+};
+
+describe('tracker.trackTarget', () => {
+  it('tracks the target position exactly without damping', () => {
+    const { target, point, track } = setup();
+    vec3.set(target.position, 1, 2, 3);
+    track([0, 0, 10]);
+    expectVec3(point, [1, 2, 3]);
+
+    vec3.set(target.position, -4, 0, 5);
+    track([0, 0, 10]);
+    expectVec3(point, [-4, 0, 5]);
+  });
+
+  it('snaps on the first call, then chases a moving target with damping', () => {
+    const { target, point, track } = setup(0.5);
+    vec3.set(target.position, 1, 0, 0);
+    track([0, 0, 10]);
+    expectVec3(point, [1, 0, 0]);
+
+    vec3.set(target.position, 5, 0, 0);
+    track([0, 0, 10]);
+    expect(point[0]).toBeGreaterThan(1);
+    expect(point[0]).toBeLessThan(5);
+
+    for (let i = 0; i < 600; i++) track([0, 0, 10]);
+    expectVec3(point, [5, 0, 0]);
+  });
+
+  it('turns the lagging point with the offset instead of damping the turn', () => {
+    const { target, point, track } = setup(1);
+    track([0, 0, 10]);
+    vec3.set(target.position, 4, 0, 0);
+    track([0, 0, 10]);
+    const lag = vec3.subtract(vec3.create(), point, target.position);
+
+    const turn = yaw(90);
+    const offset = vec3.transformQuat(vec3.create(), [0, 0, 10], turn);
+    track(offset, 0);
+    expectVec3(vec3.subtract(vec3.create(), point, target.position), vec3.transformQuat(vec3.create(), lag, turn));
+  });
+
+  it('turns the lagging point with a change of pitch', () => {
+    const { target, point, track } = setup(1);
+    track([0, 0, 10]);
+    vec3.set(target.position, 0, 0, 4);
+    track([0, 0, 10]);
+    const lag = vec3.subtract(vec3.create(), point, target.position);
+
+    const pitch = quat.setAxisAngle(quat.create(), [1, 0, 0], -Math.PI / 6);
+    track(vec3.transformQuat(vec3.create(), [0, 0, 10], pitch), 0);
+    expectVec3(vec3.subtract(vec3.create(), point, target.position), vec3.transformQuat(vec3.create(), lag, pitch));
+  });
+
+  it('keeps the camera on the orbit while the offset turns around a resting target', () => {
+    const { point, track } = setup(1);
+    track([0, 0, 10]);
+    for (let degrees = 5; degrees <= 180; degrees += 5) {
+      const offset = vec3.transformQuat(vec3.create(), [0, 0, 10], yaw(degrees));
+      track(offset);
+      expectVec3(point, [0, 0, 0]);
+    }
+  });
+
+  it('places the target offset in the reference orientation', () => {
+    const { params, target, point, orientation, track } = setup();
+    params.bindingMode = BindingModes.lockToTarget;
+    target.hasRotation = true;
+    quat.copy(target.rotation, yaw(90));
+    track([0, 0, 10], 0.016, [1, 0, 0]);
+    expectVec3(point, [0, 0, -1]);
+    expect(quat.equals(orientation, target.rotation)).toBe(true);
+
+    params.bindingMode = BindingModes.worldSpace;
+    track([0, 0, 10], 0.016, [1, 0, 0]);
+    expectVec3(point, [1, 0, 0]);
+  });
+
+  it('eases the reference orientation with rotationDamping', () => {
+    const { params, target, orientation, track } = setup();
+    params.bindingMode = BindingModes.lockToTarget;
+    params.rotationDamping = 0.5;
+    target.hasRotation = true;
+    track([0, 0, 10]);
+    quat.copy(target.rotation, yaw(90));
+    track([0, 0, 10]);
+    const turned = 2 * Math.acos(Math.min(1, Math.abs(quat.dot(orientation, quat.create()))));
+    expect(turned).toBeGreaterThan(0);
+    expect(turned).toBeLessThan(Math.PI / 2);
+
+    for (let i = 0; i < 600; i++) track([0, 0, 10]);
+    expect(Math.abs(quat.dot(orientation, target.rotation))).toBeCloseTo(1, 9);
+  });
+
+  it('eases from a primed point instead of snapping', () => {
+    const { state, point, track } = setup(0.5);
+    tracker.prime(state, [-20, 0, 0], [0, 0, 10], quat.create());
+    track([0, 0, 10]);
+    expect(point[0]).toBeGreaterThan(-20);
+    expect(point[0]).toBeLessThan(0);
+  });
+
+  it('snaps again after a reset', () => {
+    const { state, target, point, track } = setup(1);
+    track([0, 0, 10]);
+    vec3.set(target.position, 10, 0, 0);
+    tracker.reset(state);
+    track([0, 0, 10]);
+    expectVec3(point, [10, 0, 0]);
+  });
+});
diff --git a/test/golden/fixtures/body.follow.asymmetricDamping.maxSpeed.json b/test/golden/fixtures/body.follow.asymmetricDamping.maxSpeed.json
index 15336e1..07b79cd 100644
--- a/test/golden/fixtures/body.follow.asymmetricDamping.maxSpeed.json
+++ b/test/golden/fixtures/body.follow.asymmetricDamping.maxSpeed.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.follow.lockToTarget.json b/test/golden/fixtures/body.follow.lockToTarget.json
index 46e159a..34abe5b 100644
--- a/test/golden/fixtures/body.follow.lockToTarget.json
+++ b/test/golden/fixtures/body.follow.lockToTarget.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.follow.lockToTargetNoRoll.json b/test/golden/fixtures/body.follow.lockToTargetNoRoll.json
index fc4a0d8..b6164d1 100644
--- a/test/golden/fixtures/body.follow.lockToTargetNoRoll.json
+++ b/test/golden/fixtures/body.follow.lockToTargetNoRoll.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.follow.lockToTargetOnAssign.json b/test/golden/fixtures/body.follow.lockToTargetOnAssign.json
index 55a4f0c..c6c113a 100644
--- a/test/golden/fixtures/body.follow.lockToTargetOnAssign.json
+++ b/test/golden/fixtures/body.follow.lockToTargetOnAssign.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.follow.lockToTargetWithWorldUp.json b/test/golden/fixtures/body.follow.lockToTargetWithWorldUp.json
index 74cd869..305f1c3 100644
--- a/test/golden/fixtures/body.follow.lockToTargetWithWorldUp.json
+++ b/test/golden/fixtures/body.follow.lockToTargetWithWorldUp.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.follow.worldSpace.json b/test/golden/fixtures/body.follow.worldSpace.json
index fe38ca8..aa8219b 100644
--- a/test/golden/fixtures/body.follow.worldSpace.json
+++ b/test/golden/fixtures/body.follow.worldSpace.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/body.orbitFollow.lockToTarget.json b/test/golden/fixtures/body.orbitFollow.lockToTarget.json
new file mode 100644
index 0000000..84785d8
--- /dev/null
+++ b/test/golden/fixtures/body.orbitFollow.lockToTarget.json
@@ -0,0 +1 @@
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diff --git a/test/golden/fixtures/body.orbitFollow.threeRing.json b/test/golden/fixtures/body.orbitFollow.threeRing.json
new file mode 100644
index 0000000..92301dc
--- /dev/null
+++ b/test/golden/fixtures/body.orbitFollow.threeRing.json
@@ -0,0 +1 @@
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diff --git a/test/golden/fixtures/body.orbitFollow.worldSpace.json b/test/golden/fixtures/body.orbitFollow.worldSpace.json
new file mode 100644
index 0000000..0cf822b
--- /dev/null
+++ b/test/golden/fixtures/body.orbitFollow.worldSpace.json
@@ -0,0 +1 @@
+{"columns":["px","py","pz","qx","qy","qz","qw","fov","near","far"],"samples":[[0.627557557914,4.0307092386,17.5299596224,0,0,0,1,50,0.1,1000],[0.640185128667,4.12268350796,17.5009972306,0,0,0,1,50,0.1,1000],[0.667326386228,4.26453761368,17.4543265821,0,0,0,1,50,0.1,1000],[0.74005449476,4.62575342448,17.3217100353,0,0,0,1,50,0.1,1000],[0.797821811859,4.90545250843,17.2045230423,0,0,0,1,50,0.1,1000],[0.89410889108,5.42373286518,16.9499389579,0,0,0,1,50,0.1,1000],[0.951119934958,5.76349461679,16.7551827027,0,0,0,1,50,0.1,1000],[1.02225968201,6.33380021408,16.3712046741,0,0,0,1,50,0.1,1000],[1.05326224289,6.68427945116,16.0969396636,0,0,0,1,50,0.1,1000],[1.06756121435,7.24695483143,15.5835331403,0,0,0,1,50,0.1,1000],[1.05832069548,7.58107589291,15.231041994,0,0,0,1,50,0.1,1000],[0.999588061635,8.10278185085,14.5915462581,0,0,0,1,50,0.1,1000],[0.943215745395,8.40495142375,14.1630707861,0,0,0,1,50,0.1,1000],[0.803371636916,8.86572602354,13.4010543771,0,0,0,1,50,0.1,1000],[0.695803700693,9.12645174191,12.8980562263,0,0,0,1,50,0.1,1000],[0.468621758099,9.5141281568,12.0142169595,0,0,0,1,50,0.1,1000],[0.305829907649,9.72791766172,11.4352011568,0,0,0,1,50,0.1,1000],[-0.0153357881417,10.0361472559,10.4233039702,0,0,0,1,50,0.1,1000],[-0.23719588435,10.2007865084,9.76123323444,0,0,0,1,50,0.1,1000],[-0.65651373675,10.428327149,8.60426444239,0,0,0,1,50,0.1,1000],[-0.944326954989,10.5353875345,7.84918268311,0,0,0,1,50,0.1,1000],[-1.46331656952,10.6771809398,6.52094873698,0,0,0,1,50,0.1,1000],[-1.79463252239,10.749756151,5.64195736848,0,0,0,1,50,0.1,1000],[-2.37069935603,10.8326864142,4.09865991994,0,0,0,1,50,0.1,1000],[-2.72976537497,10.8631444712,3.08013355905,0,0,0,1,50,0.1,1000],[-3.30294837205,10.8533337158,1.29507439544,0,0,0,1,50,0.1,1000],[-3.36089910039,10.5607961136,0.131290824324,0,0,0,1,50,0.1,1000],[-3.05506646383,9.74262253777,-1.73323000366,0,0,0,1,50,0.1,1000],[-2.7652382871,9.19441172986,-2.82742245433,0,0,0,1,50,0.1,1000],[-2.30003746712,8.37282936218,-4.53461244884,0,0,0,1,50,0.1,1000],[-2.03718070812,7.93321481885,-5.55342238764,0,0,0,1,50,0.1,1000],[-1.67636856418,7.32700639693,-7.19118149143,0,0,0,1,50,0.1,1000],[-1.47929308383,7.00832464832,-8.19545990477,0,0,0,1,50,0.1,1000],[-1.18039112823,6.54440602985,-9.82241054913,0,0,0,1,50,0.1,1000],[-0.978056514103,6.26554238154,-10.8005925015,0,0,0,1,50,0.1,1000],[-0.604046794045,5.79503045475,-12.3115278533,0,0,0,1,50,0.1,1000],[-0.34419260239,5.48870849516,-13.1786691456,0,0,0,1,50,0.1,1000],[0.10605802627,4.96297967812,-14.4620495659,0,0,0,1,50,0.1,1000],[0.660413510141,4.46047084594,-15.7301160333,0,0,0,1,50,0.1,1000],[2.55034619018,3.63589086296,-17.529653725,0,0,0,1,50,0.1,1000],[3.95776404534,3.17113391631,-18.348573607,0,0,0,1,50,0.1,1000],[6.21180606772,2.48917405566,-19.2604619288,0,0,0,1,50,0.1,1000],[7.46356598139,2.1116953674,-19.6166002621,0,0,0,1,50,0.1,1000],[9.16451942723,1.5520387615,-19.9568148603,0,0,0,1,50,0.1,1000],[9.99201081629,1.2365767019,-20.0660375433,0,0,0,1,50,0.1,1000],[10.9811285573,0.760211207623,-20.141182482,0,0,0,1,50,0.1,1000],[11.387243827,0.488848148905,-20.150758593,0,0,0,1,50,0.1,1000],[11.7471472559,0.0791298756338,-20.1336350447,0,0,0,1,50,0.1,1000],[11.8045326262,-0.151610843992,-20.1139216893,0,0,0,1,50,0.1,1000],[11.6239330714,-0.491864276023,-20.0785599614,0,0,0,1,50,0.1,1000],[11.403051643,-0.676896102828,-20.0504970753,0,0,0,1,50,0.1,1000],[10.8666788295,-0.936464408615,-19.9946289971,0,0,0,1,50,0.1,1000],[10.4347191324,-1.06849440172,-19.9510107133,0,0,0,1,50,0.1,1000],[9.57396030111,-1.23629969457,-19.8593082176,0,0,0,1,50,0.1,1000],[8.95926731817,-1.30938919594,-19.78064082,0,0,0,1,50,0.1,1000],[7.82768819127,-1.37729564623,-19.6069293152,0,0,0,1,50,0.1,1000],[7.06341182295,-1.3881216477,-19.4608845625,0,0,0,1,50,0.1,1000],[5.71359530659,-1.35291284433,-19.1466150326,0,0,0,1,50,0.1,1000],[4.83257975933,-1.30047817476,-18.8935592558,0,0,0,1,50,0.1,1000],[3.32130555168,-1.1621542474,-18.3709470298,0,0,0,1,50,0.1,1000],[2.67476287807,-1.08698585393,-18.1061753185,0,0,0,1,50,0.1,1000]]}
diff --git a/test/golden/fixtures/core.blend.cut.json b/test/golden/fixtures/core.blend.cut.json
index 57d0e2a..0c33316 100644
--- a/test/golden/fixtures/core.blend.cut.json
+++ b/test/golden/fixtures/core.blend.cut.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/core.blend.cylindrical.json b/test/golden/fixtures/core.blend.cylindrical.json
index 58a2d10..8f67fcd 100644
--- a/test/golden/fixtures/core.blend.cylindrical.json
+++ b/test/golden/fixtures/core.blend.cylindrical.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/core.blend.damped.json b/test/golden/fixtures/core.blend.damped.json
index 42cad9e..4a84eb3 100644
--- a/test/golden/fixtures/core.blend.damped.json
+++ b/test/golden/fixtures/core.blend.damped.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/core.blend.easeInOut.json b/test/golden/fixtures/core.blend.easeInOut.json
index 7eef423..60ad2c4 100644
--- a/test/golden/fixtures/core.blend.easeInOut.json
+++ b/test/golden/fixtures/core.blend.easeInOut.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/core.blend.ignoreTarget.json b/test/golden/fixtures/core.blend.ignoreTarget.json
index a35ef51..6f7bf44 100644
--- a/test/golden/fixtures/core.blend.ignoreTarget.json
+++ b/test/golden/fixtures/core.blend.ignoreTarget.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/core.blend.spherical.json b/test/golden/fixtures/core.blend.spherical.json
index efd506d..186040b 100644
--- a/test/golden/fixtures/core.blend.spherical.json
+++ b/test/golden/fixtures/core.blend.spherical.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/extension.groupFraming.json b/test/golden/fixtures/extension.groupFraming.json
index b89953d..7f76492 100644
--- a/test/golden/fixtures/extension.groupFraming.json
+++ b/test/golden/fixtures/extension.groupFraming.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/extension.groupFraming.rigid.horizontal.average.json b/test/golden/fixtures/extension.groupFraming.rigid.horizontal.average.json
index 0de4810..33e4a00 100644
--- a/test/golden/fixtures/extension.groupFraming.rigid.horizontal.average.json
+++ b/test/golden/fixtures/extension.groupFraming.rigid.horizontal.average.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/extension.lens.json b/test/golden/fixtures/extension.lens.json
index 004596b..4ae1849 100644
--- a/test/golden/fixtures/extension.lens.json
+++ b/test/golden/fixtures/extension.lens.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/groups.clearShot.json b/test/golden/fixtures/groups.clearShot.json
index 71f913f..f3b990e 100644
--- a/test/golden/fixtures/groups.clearShot.json
+++ b/test/golden/fixtures/groups.clearShot.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/groups.mixingCamera.json b/test/golden/fixtures/groups.mixingCamera.json
index 095679e..05d25fa 100644
--- a/test/golden/fixtures/groups.mixingCamera.json
+++ b/test/golden/fixtures/groups.mixingCamera.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/groups.sequencer.loop.json b/test/golden/fixtures/groups.sequencer.loop.json
index bde8093..491501c 100644
--- a/test/golden/fixtures/groups.sequencer.loop.json
+++ b/test/golden/fixtures/groups.sequencer.loop.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/groups.stateDriven.json b/test/golden/fixtures/groups.stateDriven.json
index afc3c63..7e320dc 100644
--- a/test/golden/fixtures/groups.stateDriven.json
+++ b/test/golden/fixtures/groups.stateDriven.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/noise.impulse.json b/test/golden/fixtures/noise.impulse.json
index 23d2641..89d9038 100644
--- a/test/golden/fixtures/noise.impulse.json
+++ b/test/golden/fixtures/noise.impulse.json
@@ -1 +1 @@
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diff --git a/test/golden/fixtures/noise.perlin.json b/test/golden/fixtures/noise.perlin.json
index 7610ecd..7b216c9 100644
--- a/test/golden/fixtures/noise.perlin.json
+++ b/test/golden/fixtures/noise.perlin.json
@@ -1 +1 @@
-{"columns":["px","py","pz","qx","qy","qz","qw","fov","near","far"],"samples":[[0.823213458654,3.25822313157,16.2368867203,-0.124556629061,0.00849005551966,0.00451936061141,0.992165883557,50,0.1,1000],[1.21610682983,3.46904475164,16.1796926262,-0.129304739735,-0.00445580371023,0.0128086336089,0.99151216281,50,0.1,1000],[1.6068548381,3.68726944781,16.1176756084,-0.137219242722,-0.00297932431566,0.0197856809564,0.990338593554,50,0.1,1000],[2.07120366023,3.87902516222,16.0473043984,-0.1405891397,-0.0104163555807,0.027776545523,0.989623492473,50,0.1,1000],[2.48711696762,4.06022155231,15.9750343131,-0.146304623812,-0.00662242637552,0.0341680940741,0.988627150076,50,0.1,1000],[3.03926630404,4.16701833488,15.8769243489,-0.145448150169,-0.00752713604298,0.0413660237627,0.988472068353,50,0.1,1000],[3.46727936966,4.26006618588,15.7908301908,-0.146672557235,-0.00240138118467,0.0465802374706,0.98808485253,50,0.1,1000],[4.08486010371,4.25696604277,15.6443802725,-0.141134273263,0.00161826561509,0.0523116307337,0.98860608506,50,0.1,1000],[4.50822779642,4.25388843417,15.5294423861,-0.138098233654,0.00698669143787,0.0558068304035,0.988820338426,50,0.1,1000],[5.16857028865,4.17137325117,15.2992096659,-0.130255251839,0.0146862402332,0.0595054949316,0.989584245928,50,0.1,1000],[5.57620827198,4.11316087008,15.1244041482,-0.125720696968,0.0199737990244,0.0609025214839,0.989993048755,50,0.1,1000],[6.26239304686,4.0130627146,14.770866342,-0.119300739014,0.0310060825252,0.0623568955863,0.990412830132,50,0.1,1000],[6.64988504996,3.94907168964,14.5080520755,-0.116224569392,0.0366285383953,0.0619447403743,0.990612461452,50,0.1,1000],[7.35135725613,3.86720533756,14.0101289052,-0.113151980153,0.0513315945028,0.0615996046746,0.990336905047,50,0.1,1000],[7.71675872852,3.82509990612,13.645989312,-0.112799453097,0.0579282295352,0.0597247078373,0.990128053778,50,0.1,1000],[8.41594636247,3.78593878924,12.9976757408,-0.113935483469,0.0764019797142,0.0579043090998,0.988852129537,50,0.1,1000],[8.74329983842,3.78445310202,12.5308689516,-0.117255207294,0.083887784321,0.0549077162828,0.988027934168,50,0.1,1000],[9.39858181329,3.77326761664,11.7492884833,-0.121924464149,0.105190012053,0.0518618175813,0.985586037991,50,0.1,1000],[9.64408934191,3.78179770178,11.2042937183,-0.127548671591,0.111939744553,0.0475523886831,0.984347296586,50,0.1,1000],[10.2092235435,3.7452847342,10.3286223982,-0.133060930331,0.134492502916,0.0431939259145,0.980989724841,50,0.1,1000],[10.3521022459,3.71403614937,9.74145596757,-0.138236489679,0.139497122482,0.0373049701695,0.979816087305,50,0.1,1000],[10.8322073913,3.61272510934,8.80257563591,-0.141734464329,0.163939842526,0.031823160666,0.975716329729,50,0.1,1000],[10.9044109419,3.51759158819,8.19078252034,-0.14421296408,0.169078336248,0.0250737245676,0.974672481164,50,0.1,1000],[11.3441874907,3.35349430362,7.19074653347,-0.144376852442,0.198513988978,0.0199538567269,0.969200373638,50,0.1,1000],[11.4022289059,3.20209582472,6.5478316546,-0.143465211991,0.20757362628,0.0139143569498,0.967541892267,50,0.1,1000],[11.8430096784,2.99575813473,5.47866628645,-0.140196321211,0.245092066388,0.0100829122568,0.959256589966,50,0.1,1000],[11.9281987017,2.80148613414,4.79816869393,-0.135637321661,0.261125252397,0.00506915965392,0.955714613864,50,0.1,1000],[12.3695069382,2.58961632839,3.65959164322,-0.129943231733,0.307017343493,0.00148516875376,0.942789956244,50,0.1,1000],[12.4780370484,2.39911951752,2.93898269525,-0.123809829315,0.330051197571,-0.00323995727346,0.935802776136,50,0.1,1000],[12.8737072269,2.25009077835,1.7416657399,-0.119547925822,0.380488871635,-0.00725046908661,0.916997242467,50,0.1,1000],[12.9733152655,2.12954303071,0.988919851466,-0.115955400726,0.407261420885,-0.0113429737,0.905849776204,50,0.1,1000],[13.2758329543,2.0916654028,-0.244287451262,-0.116577875974,0.456807075099,-0.0146362893211,0.881772461584,50,0.1,1000],[13.3418636775,2.0683301964,-1.01061523613,-0.117446353115,0.483890709457,-0.0169861174497,0.867045331719,50,0.1,1000],[13.5139355729,2.12803179445,-2.23432249577,-0.12225883688,0.528237334896,-0.0184759867884,0.840045673007,50,0.1,1000],[13.5241143403,2.17606908999,-2.96849858047,-0.125766328814,0.552147470798,-0.0189888397076,0.823987515072,50,0.1,1000],[13.5448429441,2.29125530112,-4.12670028976,-0.131635588156,0.589021201984,-0.0186932050687,0.79710517476,50,0.1,1000],[13.49288789,2.38455915186,-4.78990410085,-0.135659349392,0.608229931455,-0.0176777181614,0.781882593287,50,0.1,1000],[13.3618575648,2.52041524772,-5.85353056435,-0.140377653126,0.638472394435,-0.0158390987104,0.756568727215,50,0.1,1000],[13.387820304,2.60223239159,-6.59062263345,-0.306216969105,-0.536947295903,-0.0836853737714,0.781610854244,50,0.1,1000],[14.2594684199,2.71873883682,-7.7936173894,-0.47577559047,-0.545867717858,-0.229501380104,0.650380764355,50,0.1,1000],[15.0516376445,2.8557419949,-8.5648626773,-0.159262185282,0.803441044966,0.55764808439,0.134709530399,50,0.1,1000],[16.5439602789,2.99865732172,-9.51820137311,-0.2646387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+{"columns":["px","py","pz","qx","qy","qz","qw","fov","near","far"],"samples":[[0.823213458654,3.25822313157,16.2368867203,-0.124556629061,0.00849005551966,0.00451936061141,0.992165883557,50,0.1,1000],[0.853194937139,3.2654824732,16.2411917908,-0.116868026995,-0.0280011124987,-0.00283811369814,0.992748582006,50,0.1,1000],[0.93098433761,3.27374602229,16.2386075745,-0.11196218411,-0.0461122303109,-0.00564556109544,0.992625941221,50,0.1,1000],[1.18872226492,3.29365519132,16.217731868,-0.104739469299,-0.0661068337518,-0.00694063032534,0.992275847611,50,0.1,1000],[1.42984950779,3.30919934864,16.1904780906,-0.101034302568,-0.0727673377743,-0.00594040580875,0.992200431282,50,0.1,1000],[1.9465218707,3.33791618024,16.1133491238,-0.0964607348252,-0.075264406988,-0.00192998951457,0.992485199294,50,0.1,1000],[2.33224193733,3.35740627076,16.0420350802,-0.0945136701842,-0.0724560493166,0.00172805793942,0.99288181617,50,0.1,1000],[3.04923435058,3.39094303525,15.8789679845,-0.0926341491163,-0.0620525846327,0.00914248550004,0.993722700816,50,0.1,1000],[3.53616969979,3.41302314038,15.7475646751,-0.0921593292794,-0.0527004841107,0.0144414850937,0.994243813413,50,0.1,1000],[4.38189468981,3.45017211192,15.4772083316,-0.0922743851898,-0.0336816195486,0.023768288801,0.994879919784,50,0.1,1000],[4.92804619099,3.47370104235,15.2755780027,-0.0927721552265,-0.0200587497792,0.02979487533,0.995039315392,50,0.1,1000],[5.84027985158,3.50964087144,14.8865510876,-0.0940646795427,0.00450706455221,0.0397610636811,0.994761569546,50,0.1,1000],[6.41148906335,3.52891909718,14.6105584523,-0.0950454343865,0.0208565236301,0.0459563851361,0.994192829128,50,0.1,1000],[7.34100399636,3.55512129392,14.099434614,-0.0967644226967,0.0489091154132,0.0556640113241,0.992545244698,50,0.1,1000],[7.91005133736,3.56814236908,13.7480559341,-0.0978028356418,0.066921996868,0.061351171803,0.991056045536,50,0.1,1000],[8.81683406775,3.58162522926,13.1160135137,-0.0993637369627,0.0969409698202,0.0696840241895,0.98786306385,50,0.1,1000],[9.36099825017,3.58393910057,12.6922591557,-0.100175261577,0.115807621496,0.0742581753112,0.985413230666,50,0.1,1000],[10.2109037786,3.57540649677,11.9477781337,-0.101276025883,0.146897913995,0.0804817847901,0.980656337237,50,0.1,1000],[10.7134026285,3.55812064338,11.4587199064,-0.10158530138,0.166358413099,0.0836214876056,0.977247538623,50,0.1,1000],[11.4878686168,3.51642270374,10.6126720341,-0.101934249077,0.198368859928,0.0874431765756,0.970882534165,50,0.1,1000],[11.9395955496,3.48617517795,10.0614703104,-0.102166114355,0.218371901537,0.089080389885,0.966405961196,50,0.1,1000],[12.6253270112,3.43027603278,9.11628398973,-0.102555862051,0.251174200845,0.0903796477044,0.958240750161,50,0.1,1000],[13.019158509,3.39208607653,8.5054094145,-0.102681584342,0.271598483836,0.0904926839394,0.952628904647,50,0.1,1000],[13.6038002224,3.32618960806,7.466930847,-0.102781347774,0.304882322712,0.0895649125756,0.942582033715,50,0.1,1000],[13.9310243512,3.28298670718,6.80141568026,-0.102684740273,0.325453004371,0.0884441404668,0.935795821789,50,0.1,1000],[14.3991559597,3.21096008837,5.68162144373,-0.102457418361,0.358682360668,0.0856831747718,0.923854877743,50,0.1,1000],[14.6492327565,3.16642671841,4.97104034649,-0.102227433452,0.379065976872,0.0834590287537,0.915911091508,50,0.1,1000],[14.9828435086,3.09827952836,3.78873868772,-0.101989387362,0.411854077269,0.0789325446022,0.90207762266,50,0.1,1000],[15.145178429,3.05965508321,3.04646300257,-0.101889217484,0.431911758992,0.0756533231845,0.892943108208,50,0.1,1000],[15.3305590755,3.00533248519,1.82502226818,-0.102030610727,0.463903931688,0.0696771542765,0.877227445313,50,0.1,1000],[15.3997017172,2.97649881601,1.06529663595,-0.102264534657,0.483267642854,0.0656694106246,0.866995893203,50,0.1,1000],[15.4320305799,2.93769872565,-0.172058533475,-0.103117968113,0.513929198559,0.0587931481614,0.849580384219,50,0.1,1000],[15.4058729924,2.91723930153,-0.933092983325,-0.103888645457,0.532421058037,0.0543981874777,0.838317245142,50,0.1,1000],[15.2832798639,2.89009946519,-2.15793031866,-0.105675307431,0.561705100948,0.0472717555354,0.81919807745,50,0.1,1000],[15.1622635143,2.87676262153,-2.90368589088,-0.107016462314,0.57941709708,0.0429663381015,0.806831579821,50,0.1,1000],[14.8876397783,2.86405315252,-4.09268527511,-0.109580764641,0.607603137437,0.0364371531293,0.785800749089,50,0.1,1000],[14.6747075859,2.86041057746,-4.81063172922,-0.11128187182,0.624741961601,0.0327345896454,0.772167257179,50,0.1,1000],[14.2553637213,2.86121412129,-5.94520302091,-0.114180967484,0.652122570847,0.0274550094634,0.748962670439,50,0.1,1000],[14.1683043705,2.86968594472,-6.68222906521,-0.364947510402,-0.498138906855,-0.184446632449,0.764624341691,50,0.1,1000],[14.9604172323,2.8990610723,-7.80486356633,-0.562599486512,-0.459497603241,-0.332065788701,0.601727581524,50,0.1,1000],[15.7295354281,2.91977978626,-8.4409750449,-0.323218020089,0.727934797232,0.43251685821,0.422575685331,50,0.1,1000],[16.872238195,2.92815541011,-9.53566753826,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diff --git a/test/golden/scenarios.ts b/test/golden/scenarios.ts
index 7ee1c16..5c5aa79 100644
--- a/test/golden/scenarios.ts
+++ b/test/golden/scenarios.ts
@@ -31,6 +31,7 @@ import { RotateWithFollowTargetAimThree } from '../../src/three/aim/RotateWithFo
 import { RotationComposerAimThree } from '../../src/three/aim/RotationComposerAimThree';
 import { FollowBodyThree } from '../../src/three/body/FollowBodyThree';
 import { HardLockToTargetBodyThree } from '../../src/three/body/HardLockToTargetBodyThree';
+import { OrbitFollowBodyThree, type OrbitFollowThreeOptions } from '../../src/three/body/OrbitFollowBodyThree';
 import { PositionComposerBodyThree } from '../../src/three/body/PositionComposerBodyThree';
 import { GroupFramingExtensionThree } from '../../src/three/extension/GroupFramingExtensionThree';
 import { TargetGroup } from '../../src/three/extension/TargetGroup';
@@ -77,7 +78,7 @@ const aim = (name: string, make: (w: World) => Update, perFrame?: (w: World, dt:
 /** A full controller: Follow + HardLookAt, plus whatever `extra` registers. */
 function rig(w: World, extra?: (c: VirtualCamera) => void, offset: Vec3 = [0, 3, 8]) {
   const controller = new VirtualCamera('rig');
-  controller.setBody(new FollowBodyThree(w.target, { offset, damping: 0.4 }));
+  controller.setBody(new FollowBodyThree(w.target, { offset, damping: 0.4, rotationDamping: 0.4 }));
   controller.setAim(new HardLookAtAimThree(w.target));
   extra?.(controller);
   const state = initialState();
@@ -133,6 +134,28 @@ function coreScenario(name: string, defaultBlend: BlendDefinition, hints: BlendH
 
 const bindingModes: BindingMode[] = Object.values(BindingModes);
 
+/** OrbitFollow with all three axes driven every frame and a radius change halfway. */
+const orbitFollowScenario = (name: string, options: OrbitFollowThreeOptions): Scenario => ({
+  name,
+  run: () =>
+    simulate((w) => {
+      const orbit = new OrbitFollowBodyThree(w.target, options);
+      orbit.vertical.setValue(17.5);
+      orbit.horizontal.damping = 0.2;
+      orbit.vertical.damping = 0.2;
+      orbit.radial.damping = 0.3;
+      const state = initialState();
+      return (dt, frame) => {
+        orbit.horizontal.applyDelta(Math.sin(w.clock.time) * 90 * dt);
+        orbit.vertical.applyDelta(Math.cos(w.clock.time * 1.3) * 40 * dt);
+        orbit.radial.applyDelta(Math.sin(w.clock.time * 0.7) * 0.5 * dt);
+        if (frame === 100) orbit.radius = 6;
+        orbit.update(state, dt, frame === 0);
+        return state;
+      };
+    }),
+});
+
 export const scenarios: Scenario[] = [
   // bodies
   body('body.hardLockToTarget', (w) => new HardLockToTargetBodyThree(w.target, { damping: 0.3 }).update),
@@ -143,7 +166,9 @@ export const scenarios: Scenario[] = [
   ...bindingModes.map((mode) =>
     body(
       `body.follow.${mode}`,
-      (w) => new FollowBodyThree(w.target, { offset: [0, 3, 8], damping: 0.4, bindingMode: mode }).update,
+      (w) =>
+        new FollowBodyThree(w.target, { offset: [0, 3, 8], damping: 0.4, rotationDamping: 0.4, bindingMode: mode })
+          .update,
     ),
   ),
   body(
@@ -186,6 +211,15 @@ export const scenarios: Scenario[] = [
         lookaheadIgnoreY: true,
       }).update,
   ),
+  orbitFollowScenario('body.orbitFollow.worldSpace', { radius: 10, damping: 0.4 }),
+  orbitFollowScenario('body.orbitFollow.threeRing', { orbitStyle: 'threeRing', splineCurvature: 0.3, damping: 0.4 }),
+  orbitFollowScenario('body.orbitFollow.lockToTarget', {
+    radius: 10,
+    damping: { into: 0.2, from: 0.6 },
+    bindingMode: BindingModes.lockToTarget,
+    targetOffset: [0, 0.5, 0],
+    maxSpeed: 20,
+  }),
 
   // aims
   aim('aim.hardLookAt', (w) => new HardLookAtAimThree(w.target).update),
diff --git a/test/react/body/Follow.test.tsx b/test/react/body/Follow.test.tsx
index 54b1354..fc8d18e 100644
--- a/test/react/body/Follow.test.tsx
+++ b/test/react/body/Follow.test.tsx
@@ -26,6 +26,7 @@ describe('Body.Follow', () => {
         target: new Object3D(),
         offset: [1, 2, 3],
         damping: { into: 0.2, from: 1 },
+        rotationDamping: 0.3,
         bindingMode: BindingModes.lockToTargetNoRoll,
         maxSpeed: 8,
       },
diff --git a/test/react/body/OrbitFollow.test.tsx b/test/react/body/OrbitFollow.test.tsx
new file mode 100644
index 0000000..2034cfc
--- /dev/null
+++ b/test/react/body/OrbitFollow.test.tsx
@@ -0,0 +1,139 @@
+import { useThree } from '@react-three/fiber';
+import { create } from '@react-three/test-renderer';
+import { createRef } from 'react';
+import { Object3D } from 'three';
+import { describe, expect, it } from 'vitest';
+
+import { BindingModes } from '../../../src/core/body/BindingModes';
+
+import type { OrbitFollowBodyThree } from '../../../src/three/body/OrbitFollowBodyThree';
+import { OrbitFollowHelperThree } from '../../../src/three/body/OrbitFollowHelperThree';
+import type { KlippThree } from '../../../src/three/KlippThree';
+
+import { Body } from '../../../src/react/body/Body';
+import type { OrbitFollowProps } from '../../../src/react/body/OrbitFollow';
+import { InputController } from '../../../src/react/input/InputController';
+import { Klipp } from '../../../src/react/Klipp';
+import { useKlipp } from '../../../src/react/KlippContext';
+import { VirtualCamera } from '../../../src/react/VirtualCamera';
+
+import { expectPropsReachInstance, expectStopsWhenUnmounted, mountInCamera } from '../wiring';
+
+function SceneReader({ onRead }: { onRead: (core: KlippThree, element: HTMLElement) => void }) {
+  const element = useThree((state) => state.gl.domElement);
+  onRead(useKlipp(), element);
+  return null;
+}
+
+describe('Body.OrbitFollow', () => {
+  it('registers a body that orbits the target every frame', async () => {
+    const target = new Object3D();
+    target.position.set(3, 0, 0);
+    const mounted = await mountInCamera();
+    await mounted.frame();
+    expect(mounted.state.position[0]).toBeCloseTo(3, 9);
+    expect(mounted.state.position[2]).toBeCloseTo(5, 9);
+  });
+
+  it('passes every body prop to the same body, on mount and when props change', async () => {
+    await expectPropsReachInstance(
+      (props, ref) => ,
+      { target: new Object3D(), radius: 4, targetOffset: [0, 1, 0], damping: 0.5, maxSpeed: 4 },
+      {
+        target: new Object3D(),
+        radius: 8,
+        targetOffset: [1, 2, 3],
+        bindingMode: BindingModes.lockToTarget,
+        damping: { into: 0.2, from: 1 },
+        maxSpeed: 8,
+        recenteringTarget: 'axisCenter',
+        orbitStyle: 'threeRing',
+        orbits: { top: { height: 3, radius: 1 }, center: { height: 1, radius: 3 }, bottom: { height: 0, radius: 2 } },
+        splineCurvature: 0.2,
+      },
+    );
+  });
+
+  it('applies axis settings, and restores the defaults when they are removed, keeping the value', async () => {
+    const ref = createRef();
+    const scene = (props: OrbitFollowProps) => ;
+    const mounted = await mountInCamera(scene({ radial: { range: [-1, 1], damping: 0.3 } }));
+    const body = ref.current!;
+    expect(body.radial).toMatchObject({ range: [-1, 1], damping: 0.3 });
+    expect(body.vertical.value).toBe(0);
+
+    body.radial.setValue(0.5);
+    await mounted.update(scene({}));
+    expect(body.radial).toMatchObject({ range: [Math.log(0.5), Math.log(2)], damping: 0, value: 0.5 });
+    expect(body.horizontal).toMatchObject({ range: [-180, 180], wrap: true });
+  });
+
+  it('applies autoNormalize to horizontal, unless its axis settings say otherwise', async () => {
+    const ref = createRef();
+    const scene = (props: OrbitFollowProps) => ;
+    const mounted = await mountInCamera(scene({}));
+    expect(ref.current!.horizontal.autoNormalize).toBe(false);
+
+    await mounted.update(scene({ autoNormalize: true }));
+    expect(ref.current!.horizontal.autoNormalize).toBe(true);
+    expect(ref.current!.vertical.autoNormalize).toBe(false);
+
+    await mounted.update(scene({ autoNormalize: true, horizontal: { autoNormalize: false } }));
+    expect(ref.current!.horizontal.autoNormalize).toBe(false);
+  });
+
+  it('turns with a nested InputController, found through context', async () => {
+    let core: KlippThree | undefined;
+    let element: HTMLElement | undefined;
+    const renderer = await create(
+      
+         ((core = c), (element = e))} />
+        
+          
+            
+          
+        
+      ,
+    );
+    await renderer.advanceFrames(1, 0.05);
+    const before = [...core!.activeState!.position];
+
+    const pointer = { pointerId: 1, buttons: 1, bubbles: true, pointerType: 'mouse' };
+    element!.dispatchEvent(new PointerEvent('pointerdown', { ...pointer, clientX: 0, clientY: 0 }));
+    element!.dispatchEvent(new PointerEvent('pointermove', { ...pointer, clientX: 20, clientY: 0 }));
+    await renderer.advanceFrames(1, 0.05);
+
+    expect(core!.activeState!.position).not.toEqual(before);
+  });
+
+  it("starts from VirtualCamera's initialState.position direction", async () => {
+    const target = new Object3D();
+    const mounted = await mountInCamera(, { position: [-4, 0, 0] });
+    await mounted.frame();
+    expect(mounted.state.position[0]).toBeCloseTo(-10, 6);
+    expect(mounted.state.position[1]).toBeCloseTo(0, 6);
+    expect(mounted.state.position[2]).toBeCloseTo(0, 6);
+  });
+
+  it('draws the orbit in the scene while debug is on', async () => {
+    const scene = (debug: boolean) => ;
+    const helpers = () => {
+      const found: OrbitFollowHelperThree[] = [];
+      mounted.renderer.scene.instance.traverse((object) => {
+        if (object instanceof OrbitFollowHelperThree) found.push(object);
+      });
+      return found;
+    };
+    const mounted = await mountInCamera(scene(true));
+    await mounted.frame();
+    expect(helpers()).toHaveLength(1);
+    expect(helpers()[0].geometry.drawRange.count).toBeGreaterThan(0);
+
+    await mounted.update(scene(false));
+    expect(helpers()).toHaveLength(0);
+  });
+
+  it('stops moving the camera once unmounted', async () => {
+    await expectStopsWhenUnmounted((target) => );
+  });
+});
diff --git a/test/three/body/FollowBodyThree.test.ts b/test/three/body/FollowBodyThree.test.ts
index 9dc0551..ce77e4b 100644
--- a/test/three/body/FollowBodyThree.test.ts
+++ b/test/three/body/FollowBodyThree.test.ts
@@ -14,21 +14,13 @@ function expectVec3Close(actual: Vec3, expected: Vec3) {
   for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 8);
 }
 
-/** Runs one update so the next one damps instead of snapping, then moves the camera back to the origin. */
-function warmUp(body: FollowBodyThree) {
-  const out = cameraState.create();
-  body.update(out, 0.016, false);
-  vec3.set(out.position, 0, 0, 0);
-  return out;
-}
-
 describe('FollowBodyThree', () => {
   it('sits at the offset from the target and publishes the target as out.target', () => {
     const out = cameraState.create();
     new FollowBodyThree(new Vector3(2, 3, 4), { offset: [1, 2, 3] }).update(out, 0.1, false);
 
-    expect(out.position).toEqual([3, 5, 7]);
-    expect(out.target).toEqual([2, 3, 4]);
+    expectVec3Close(out.position, [3, 5, 7]);
+    expectVec3Close(out.target, [2, 3, 4]);
     expect(out.hasTarget).toBe(true);
   });
 
@@ -50,19 +42,20 @@ describe('FollowBodyThree', () => {
   });
 
   describe('damping', () => {
-    it('snaps on the very first update, then eases toward the offset position and converges', () => {
-      const body = new FollowBodyThree(new Vector3(), { offset: [10, 5, -3], damping: 0.3 });
+    it('snaps on the very first update, then eases after a moving target and converges', () => {
+      const target = new Vector3();
+      const body = new FollowBodyThree(target, { offset: [10, 5, -3], damping: 0.3 });
       const out = cameraState.create();
       body.update(out, 0.016, false);
-      expect(out.position).toEqual([10, 5, -3]);
+      expectVec3Close(out.position, [10, 5, -3]);
 
-      vec3.set(out.position, 0, 0, 0);
+      target.set(-10, 0, 0);
       body.update(out, 0.016, false);
       expect(out.position[0]).toBeGreaterThan(0);
       expect(out.position[0]).toBeLessThan(10);
 
       for (let i = 0; i < 300; i++) body.update(out, 0.016, false);
-      expectVec3Close(out.position, [10, 5, -3]);
+      expectVec3Close(out.position, [0, 5, -3]);
     });
 
     it('keeps out.target exactly offset away from the damped position (real bug: the lag distorted the offset blend hints read)', () => {
@@ -80,13 +73,11 @@ describe('FollowBodyThree', () => {
 
     it('maxSpeed caps how fast damping closes the gap', () => {
       const run = (maxSpeed: number) => {
-        const body = new FollowBodyThree(new Vector3(), {
-          offset: [100, 0, 0],
-          damping: 1,
-          bindingMode: BindingModes.lockToTarget,
-          maxSpeed,
-        });
-        const out = warmUp(body);
+        const target = new Vector3();
+        const body = new FollowBodyThree(target, { offset: [0, 0, 5], damping: 1, maxSpeed });
+        const out = cameraState.create();
+        body.update(out, 0.016, false);
+        target.set(100, 0, 0);
         body.update(out, 0.05, false);
         return out.position[0];
       };
@@ -106,7 +97,7 @@ describe('FollowBodyThree', () => {
       return out.position;
     };
 
-    expect(run(true)).toEqual([-40, 12, 3]);
+    expectVec3Close(run(true), [-40, 12, 3]);
     expect(run(false)).not.toEqual([-40, 12, 3]);
   });
 
@@ -125,6 +116,25 @@ describe('FollowBodyThree', () => {
     expect(out.position).toEqual([-40, 12, 3]);
   });
 
+  it('rotationDamping eases the turn with the target, which is instant without it', () => {
+    const run = (rotationDamping: number) => {
+      const target = new Object3D();
+      const body = new FollowBodyThree(target, { offset: [0, 0, 10], rotationDamping });
+      const out = cameraState.create();
+      body.update(out, 0.016, false);
+      target.rotation.y = Math.PI / 2;
+      target.updateMatrixWorld();
+      body.update(out, 0.016, false);
+      return out.position;
+    };
+
+    expectVec3Close(run(0), [10, 0, 0]);
+    const eased = run(0.5);
+    expect(eased[0]).toBeGreaterThan(0);
+    expect(eased[0]).toBeLessThan(10);
+    expect(Math.hypot(eased[0], eased[2])).toBeCloseTo(10, 9);
+  });
+
   describe('bindingMode', () => {
     /** A target yawed, pitched and rolled, so every mode has something to ignore. */
     function tiltedTarget() {
@@ -200,5 +210,24 @@ describe('FollowBodyThree', () => {
       body.update(out, 0.1, false);
       expectVec3Close(out.position, [5, 1, 8]);
     });
+
+    it('lockToTargetOnAssign captures the rotation again on entering the mode and on activation', () => {
+      const target = new Object3D();
+      const { body, out } = follow(target, BindingModes.lockToTargetOnAssign);
+      expectVec3Close(out.position, [0, 1, 8]);
+
+      target.rotateY(0.4);
+      target.updateMatrixWorld();
+      body.bindingMode = BindingModes.worldSpace;
+      body.update(out, 0.1, false);
+      body.bindingMode = BindingModes.lockToTargetOnAssign;
+      body.update(out, 0.1, false);
+      expectVec3Close(out.position, rotated([0, 1, 8], target.quaternion));
+
+      target.rotation.set(0, 0, 0);
+      target.updateMatrixWorld();
+      body.update(out, 0.1, true);
+      expectVec3Close(out.position, [0, 1, 8]);
+    });
   });
 });
diff --git a/test/three/body/OrbitFollowBodyThree.test.ts b/test/three/body/OrbitFollowBodyThree.test.ts
new file mode 100644
index 0000000..808c571
--- /dev/null
+++ b/test/three/body/OrbitFollowBodyThree.test.ts
@@ -0,0 +1,59 @@
+import type { Vec3 } from 'math';
+import { Object3D, Vector3 } from 'three';
+import { describe, expect, it } from 'vitest';
+
+import * as cameraState from '../../../src/core/CameraState';
+import { BindingModes } from '../../../src/core/body/BindingModes';
+
+import { OrbitFollowBodyThree } from '../../../src/three/body/OrbitFollowBodyThree';
+
+function expectVec3Close(actual: Vec3, expected: Vec3) {
+  for (let i = 0; i < 3; i++) expect(actual[i]).toBeCloseTo(expected[i], 8);
+}
+
+function orbit(body: OrbitFollowBodyThree) {
+  const out = cameraState.create();
+  body.update(out, 0.016, false);
+  return out;
+}
+
+describe('OrbitFollowBodyThree', () => {
+  it('orbits a fixed point', () => {
+    const out = orbit(new OrbitFollowBodyThree(new Vector3(1, 2, 3)));
+    expectVec3Close(out.position, [1, 2, 13]);
+    expectVec3Close(out.target, [1, 2, 3]);
+  });
+
+  it("orbits an Object3D's world position, rotating the orbit with it in lockToTarget", () => {
+    const parent = new Object3D();
+    parent.position.set(0, 5, 0);
+    const child = new Object3D();
+    child.position.set(2, 0, 0);
+    child.rotation.y = Math.PI / 2;
+    parent.add(child);
+    parent.updateMatrixWorld();
+
+    const out = orbit(new OrbitFollowBodyThree(child, { bindingMode: BindingModes.lockToTarget }));
+    expectVec3Close(out.position, [12, 5, 0]);
+  });
+
+  it('follows a ref once it resolves', () => {
+    const ref = { current: null as Object3D | null };
+    const body = new OrbitFollowBodyThree(ref);
+    const out = orbit(body);
+    expect(out.hasTarget).toBe(false);
+
+    ref.current = new Object3D();
+    ref.current.position.set(0, 0, -4);
+    ref.current.updateMatrixWorld();
+    body.update(out, 0.016, false);
+    expectVec3Close(out.position, [0, 0, 6]);
+  });
+
+  it('takes targetOffset as a Vector3, a tuple or one number', () => {
+    expect(new OrbitFollowBodyThree(null, { targetOffset: new Vector3(1, 2, 3) }).targetOffset).toEqual([1, 2, 3]);
+    expect(new OrbitFollowBodyThree(null, { targetOffset: [0, 1.5] }).targetOffset).toEqual([0, 1.5, 0]);
+    expect(new OrbitFollowBodyThree(null, { targetOffset: 2 }).targetOffset).toEqual([2, 2, 2]);
+    expect(new OrbitFollowBodyThree(null).targetOffset).toEqual([0, 0, 0]);
+  });
+});
diff --git a/test/three/body/OrbitFollowHelperThree.test.ts b/test/three/body/OrbitFollowHelperThree.test.ts
new file mode 100644
index 0000000..a459367
--- /dev/null
+++ b/test/three/body/OrbitFollowHelperThree.test.ts
@@ -0,0 +1,69 @@
+import { Color, Vector3 } from 'three';
+import { describe, expect, it } from 'vitest';
+
+import * as cameraState from '../../../src/core/CameraState';
+
+import { OrbitFollowBodyThree } from '../../../src/three/body/OrbitFollowBodyThree';
+import { OrbitFollowHelperThree } from '../../../src/three/body/OrbitFollowHelperThree';
+
+function drawn(helper: OrbitFollowHelperThree): Vector3[] {
+  const attribute = helper.geometry.getAttribute('position');
+  const points: Vector3[] = [];
+  for (let i = 0; i < helper.geometry.drawRange.count; i++)
+    points.push(new Vector3().fromBufferAttribute(attribute, i));
+  return points;
+}
+
+describe('OrbitFollowHelperThree', () => {
+  it('draws a circle and an arc on the sphere around the target', () => {
+    const target = new Vector3(1, 2, 3);
+    const body = new OrbitFollowBodyThree(target, { radius: 4 });
+    body.update(cameraState.create(), 0.016, false);
+    const helper = new OrbitFollowHelperThree();
+    helper.sync(body);
+
+    const points = drawn(helper);
+    expect(points.length).toBe((64 + 32) * 2);
+    for (const point of points) expect(point.distanceTo(target)).toBeCloseTo(4, 4);
+  });
+
+  it('adds the three rings for threeRing', () => {
+    const body = new OrbitFollowBodyThree(new Vector3(), { orbitStyle: 'threeRing' });
+    body.update(cameraState.create(), 0.016, false);
+    const helper = new OrbitFollowHelperThree();
+    helper.sync(body);
+
+    const points = drawn(helper);
+    expect(points.length).toBe((64 * 4 + 32) * 2);
+    const heights = new Set(points.slice(0, 64 * 6).map((point) => Math.round(point.y)));
+    expect([...heights].sort((a, b) => a - b)).toEqual([-10, 0, 10]);
+  });
+
+  it('colors the horizontal circle, the vertical arc and the rings apart', () => {
+    const body = new OrbitFollowBodyThree(new Vector3(), { orbitStyle: 'threeRing' });
+    body.update(cameraState.create(), 0.016, false);
+    const helper = new OrbitFollowHelperThree();
+    helper.sync(body);
+
+    const colors = helper.geometry.getAttribute('color');
+    const expectColor = (vertex: number, expected: Color) =>
+      expect(new Color().fromBufferAttribute(colors, vertex).toArray()).toEqual(
+        expected.toArray().map((channel) => expect.closeTo(channel, 6)),
+      );
+    expectColor(0, helper.colors.rings);
+    expectColor(64 * 6, helper.colors.horizontal);
+    expectColor(64 * 8, helper.colors.vertical);
+  });
+
+  it('follows the camera that moves with the target', () => {
+    const target = new Vector3();
+    const body = new OrbitFollowBodyThree(target, { radius: 4 });
+    const helper = new OrbitFollowHelperThree();
+    const out = cameraState.create();
+    body.update(out, 0.016, false);
+    target.set(10, 0, 0);
+    body.update(out, 0.016, false);
+    helper.sync(body);
+    for (const point of drawn(helper)) expect(point.distanceTo(target)).toBeCloseTo(4, 4);
+  });
+});