[Renderer] sky disc

Author: MetsukiMio

bootassets/openminecraft-renderer/shaders/core/voxel/skydisc.frag.glsl

@@ -1,9 +1,10 @@
 #version 330 core
 #extension GL_ARB_separate_shader_objects : enable
 
+layout(location = 0) in vec3 discColor;
 layout(location = 0) out vec4 outColor;
 
 void main()
 {
-    outColor = vec4(1.0);
+    outColor = vec4(discColor, 1.0);
 }

bootassets/openminecraft-renderer/shaders/core/voxel/skydisc.vert.glsl

@@ -1,7 +1,34 @@
 #version 330 core
 #extension GL_ARB_separate_shader_objects : enable
 
+#include "basics/vertexgen.glsl"
+
+#include "basics/structs/camera.glsl"
+layout(location = 0) out vec3 discColor;
+
+#define PI 3.1415926535897
+
 void main()
 {
-    gl_Position = vec4(1.0);
+    vec4 actualPos;
+    int id = vertexgen_id();
+    if (id % 3 == 0)
+    {
+        actualPos = vec4(0.0, 0.0, 0.0, 1.0);
+        discColor = vec3(0.470, 0.654, 1.0);
+    }
+    else if (id % 3 == 1)
+    {
+        actualPos = vec4(sin(PI / 4 * (id / 3)), 0.0, cos(PI / 4 * (id / 3)), 1.0);
+        discColor = vec3(0.198, 0.371, 1.0);
+    }
+    else
+    {
+        actualPos = vec4(sin(PI / 4 * (id / 3 + 1)), 0.0, cos(PI / 4 * (id / 3 + 1)), 1.0);
+        discColor = vec3(0.198, 0.371, 1.0);
+    }
+
+    actualPos *= 256;
+    actualPos.y = -16;
+    gl_Position = camera.viewProj * actualPos;
 }

include/openminecraft/renderer/common/wrap/om_renderer_voxel.hpp

@@ -339,6 +339,7 @@ class OMVoxelManager
     OMRendererPipeline *pipeline, *debugPipeline, *complexPipeline;
     OMRendererPipeline *translucentPipeline, *translucentComplexPipeline;
     OMRendererPipeline *composePipeline;
+    OMRendererPipeline *skyDiscPipeline;
     OMRendererBuffer *chunkoffs, *debugoffs;
     OMRendererTexture *textureAtlas;
     OMRendererTexture *textureAtlasSecondary;

scripts/draw3.py

@@ -186,6 +186,22 @@ OMVoxelManager::OMVoxelManager(OMRenderer *renderer, OMRendererRenderTarget *res
             ->depthReverseZ(true)
             ->buildN();
 
+    skyDiscPipeline = renderer->createPipeline()
+                          ->input(UniformBuffer)
+                          ->inputName("Camera")
+                          ->output(cutoutTargetMS->target)
+                          ->samples(samples)
+                          ->shader(renderer->shaderManager.preprocess("core/voxel/skydisc.frag.glsl", Fragment,
+                                                                      GLSLSource, simpleFormat))
+                          ->shader(renderer->shaderManager.preprocess("core/voxel/skydisc.vert.glsl", Vertex,
+                                                                      GLSLSource, simpleFormat))
+                          ->format(simpleFormat)
+                          ->blendFunc({Alpha, OneMinusAlpha, Alpha, OneMinusAlpha})
+                          ->blend(true)
+                          ->depth(false, false)
+                          ->depthReverseZ(true)
+                          ->buildN();
+
     composePipeline = renderer->createPipeline()
                           ->input(ImageSampler)
                           ->inputName("inTextureCutout")
@@ -394,6 +410,8 @@ auto OMVoxelManager::submit(OMRendererTask *task, OMRendererTempTarget *resolveT
     auto tsk = task->clearColor({0.198f, 0.371f, 1.0f, 1.0f})
                    ->clearDepth(0.0f)
                    ->target(cutoutTargetMS->target)
+                   ->pipeline(skyDiscPipeline)
+                   ->drawN(24)
                    ->pipeline(pipeline)
                    ->vertexBuffer({voxelLayer->buf()->buffer})
                    ->drawInstanceN(6, voxelLayer->buf()->totalSize / sizeof(OMVoxel))

src/openminecraft-core/renderer/common/wrap/om_renderer_voxel_manager.cpp

@@ -94,6 +94,7 @@ OMWorldRenderer::OMWorldRenderer(OMRenderer *renderer, std::shared_ptr<basics::O
     voxelManager->complexPipeline->bindInput(0, cameraBuffer);
     voxelManager->translucentPipeline->bindInput(0, cameraBuffer);
     voxelManager->translucentComplexPipeline->bindInput(0, cameraBuffer);
+    voxelManager->skyDiscPipeline->bindInput(0, cameraBuffer);
 }
 
 static float ang = 0.0f;