Multi select in the editor

[deanblackborough]

• Added multi select to the editor, bounded box with new drag handle
• Added multi move and delete
• Multi move and delete atomic actions supported by the command system and undo/redo

Summary by CodeRabbit

New Features

• Multi-object selection via viewport and outliner with Shift+click toggling.
• Move multiple selected objects together with atomic undo/redo.
• Delete multiple selected objects using Delete/Backspace keys with grouped undo/redo.
• Ctrl+D shortcut to duplicate the active selected object.
• Selection count display in inspector when multiple objects selected.
• Visual multi-selection bounds and move handle rendering in viewport.

Documentation

• Added design decision documentation clarifying grouped move/delete support and deferred grouped inspector edits for multi-selection.
• Updated roadmap reflecting completed multi-selection and grouped operation implementation.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 2e6c1636-381f-4260-83e2-545cd2bb95fa

📥 Commits

Reviewing files that changed from the base of the PR and between 553428a and 9f662f6.

📒 Files selected for processing (17)

• DECISIONS.md
• NOTES.md
• src/prune/editor/editor_command.cpp
• src/prune/editor/editor_command.hpp
• src/prune/scene/game_object_manager.cpp
• src/prune/scene/game_object_manager.hpp
• src/prune/scene/scene_interaction.cpp
• src/prune/scene/scene_interaction.hpp
• src/prune/scene/scene_renderer.cpp
• src/prune/scene/scene_renderer.hpp
• src/prune/scene/scene_state.hpp
• src/prune/scene/world_scene.cpp
• src/prune/scene/world_scene.hpp
• src/prune/tooling/command_history.cpp
• src/prune/tooling/controls.cpp
• src/prune/tooling/inspector.cpp
• src/prune/tooling/outliner.cpp

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📝 Walkthrough

Walkthrough

This PR implements multi-object selection in the editor. GameObjectManager is migrated from a single selected ID to a m_selected_ids vector, gaining select_many, toggle_selected, clear_selection, is_selected, selected_count, and selected_ids methods. EditorCommand replaces single-object optional snapshot fields with before_objects/after_objects vectors and object_ids, and gains MoveObjects/DeleteObjects command types with corresponding factory functions. SceneInteraction is updated for shift-click toggling, multi-object drag (tracking per-object start transforms in a new DragState.object_starts vector), keyboard nudge across the full selection set, and a new handle_delete_duplicate_shortcuts handler for delete and ctrl+d duplication. SceneRenderer is refactored to draw per-object outlines and a combined multi-selection bounds gizmo. WorldScene gains batch snapshot restoration for undo/redo of multi-deletes. Tooling panels (outliner, inspector, command history, controls) are updated accordingly. Documentation records deferred grouped inspector edits.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~60 minutes

Possibly related PRs

• deanblackborough/Prune#73: Introduces the initial EditorCommand model and history pipeline that this PR directly extends with multi-object command types, snapshot vectors, and new factory functions in the same files.
• deanblackborough/Prune#75: Establishes WorldScene::apply_editor_command and snapshot-restore infrastructure that this PR builds on to add DeleteObjects undo/redo and batch restore_object_snapshots.
• deanblackborough/Prune#37: Adds the SceneInteraction drag/nudge/click handlers in scene_interaction.cpp/.hpp that this PR refactors entirely for multi-object support.

Suggested labels

enhancement

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch multi-select

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