Awesome
Minimal Compute Shader Examples
Minimal test scenes contains compute shaders, compute buffers etc Playing with the transport between CPU <-> GPU
Unity version : 2022.2.4f1+, contains both BuiltinRP and Universal Render Pipeline (URP) scenes
See branches for older Unity versions
Tested with : Win DX11
| Scene | Image | Description |
|---|---|---|
| 🔷 01_Compute_Texture 🔷 | ||
01_1_Basic | <img src="READMEimages/01_1_Basic.gif" width="250" /> | The most basic one, edit texture with compute shader, shader takes the texture for rendering |
01_2_FallingSand | <img src="READMEimages/01_2_FallingSand.gif" width="250" /> | Example of using compute to animate texture pixels |
01_3_Fluid_2D | <img src="READMEimages/01_3_Fluid_2D.gif" width="250" /> | GPU Fluid. Ref to Scrawk/GPU-GEMS-2D-Fluid-Simulation |
01_4_Fluid_3D | <img src="READMEimages/01_4_Fluid_3D.gif" width="250" /> | A 3D version based on above GPU Fluid |
| 🔷 02_StructuredBuffer 🔷 | ||
02_1_StructuredBufferNoCompute | <img src="READMEimages/02_1_StructuredBufferNoCompute.gif" width="250" /> | ComputeBuffer can also be used in Shader, not just ComputeShader. The folder contains implementation of unlit vert-frag, surface shader and unlit URP shader |
02_2_ComputePaintTexture | <img src="READMEimages/02_2_ComputePaintTexture.gif" width="250" /> | Paint the texture by sending object positions to compute shader with StructuredBuffer |
02_3_RotatingCircles | <img src="READMEimages/02_3_RotatingCircles.gif" width="250" /> | Similar to above, just another playground scene |
02_4_ComputePaintTexture_DFT | <img src="READMEimages/02_4_ComputePaintTexture_DFT.gif" width="250" /> | Similar to above but drawing with Epicycles using Discrete Fourier Transform. Ref to The Coding Train's youtube video |
02_5_ComputeParticlesDirect | <img src="READMEimages/02_5_ComputeParticlesDirect.gif" width="250" /> | GPU Particle, drawing fixed no. of particles |
02_6_ComputeSketch | <img src="READMEimages/02_6_ComputeSketch.gif" width="250" /> | Draw quads on the screen with color filled by compute shader |
02_7_ShimmerSphere | <img src="READMEimages/02_7_ShimmerSphere.gif" width="250" /> | Pass spheres position and radius to quad material for a fake shimmer effect |
| 🔷 03_GPU_to_CPU 🔷 | ||
03_1_StructuredBufferWithCompute | <img src="READMEimages/03_1_StructuredBufferWithCompute.gif" width="250" /> | Another basic one, use compute to calculate some data and send back to CPU |
03_2_AsyncGPUReadback | <img src="READMEimages/03_2_AsyncGPUReadback.gif" width="250" /> | Similar to StructuredBufferWithCompute, but use AsyncGPUReadback to get array data back to CPU |
03_3_AsyncGPUReadbackTex | <img src="READMEimages/03_3_AsyncGPUReadbackTex.gif" width="250" /> | Result is same as ComputeUAVTexture, but this scene uses AsyncGPUReadback to get texture data back to CPU, and CPU send the texture data to Shader for rendering |
03_4_AsyncGPUReadbackMesh | <img src="READMEimages/03_4_AsyncGPUReadbackMesh.gif" width="250" /> | Update mesh vertices with compute + AsyncGPUReadback to get the vertex data back to CPU for physics |
03_5_AsyncGPUReadbackMesh_NewMeshAPI | <img src="READMEimages/03_4_AsyncGPUReadbackMesh.gif" width="250" /> | Same as above but using the new Mesh API |
03_6_PixelPercentage | <img src="READMEimages/03_6_PixelPercentage.gif" width="250" /> | Count the filled pixel percentage |
03_7_ColorPalette | <img src="READMEimages/03_7_ColorPalette.JPG" width="250" /> | Find the top colors and replace them |
| 🔷 04_Indirect 🔷 | ||
04_1_IndirectCompute | <img src="READMEimages/04_1_IndirectCompute.gif" width="250" /> | Simple indirect compute (indirect dispatch) and CopyCount |
04_2_ComputeParticlesIndirect | <img src="READMEimages/04_2_ComputeParticlesIndirect.gif" width="250" /> | GPU Particle, drawing dynamic no. of particles, no need to read back to CPU! |
04_3_ComputeParticlesIndirect_VFX | <img src="READMEimages/04_3_ComputeParticlesIndirect_VFX.gif" width="250" /> | Implementation of above scene with VFX graph |
04_4_IndirectReflectedStar | <img src="READMEimages/04_4_IndirectReflectedStar.gif" width="250" /> | Draw stars on the screen only if the pixels are bright enough |
| 🔷 05_Shader_to_CPU 🔷 | ||
05_1_UAVInShader | <img src="READMEimages/05_1_UAVInShader.gif" width="250" /> | Read some data back to CPU from fragment shader |
05_2_ShaderBakeToTexture | <img src="READMEimages/05_2_ShaderBakeToTexture.gif" width="250" /> | Bake shader pixel result to texture |
| 🔷 06_Compute_Mesh 🔷 | ||
06_1_ComputeVertex | <img src="READMEimages/06_1_ComputeVertex.gif" width="250" /> | Replace vertex buffer with StructuredBuffer and drive vertex displacement by compute |
06_2_ComputeVertexLit | <img src="READMEimages/06_2_ComputeVertexLit.gif" width="250" /> | A usecase of above, with different shader passes share the same vertex data |
06_3_SkinnedMeshBuffer_SameMesh | <img src="READMEimages/06_3_SkinnedMeshBuffer_SameMesh.gif" width="250" /> | Blend the vertex data from 2 SkinnedMeshRenderer vertex buffer and render it with MeshRenderer |
06_4_SkinnedMeshBuffer_DiffMesh | <img src="READMEimages/06_4_SkinnedMeshBuffer_DiffMesh.gif" width="250" /> | Similar to above but blending 2 different SkinnedMeshes. The blended triangles are drawn with DrawMeshInstancedIndirect() |
06_5_VFXGraphMeshDeform | <img src="READMEimages/06_5_VFXGraphMeshDeform.gif" width="250" /> | Using VFX Graph to deforming mesh (particle as vertex) |
Disclaimer: The stuff here might not be the best practice / optimized :'(. But at least they works. Play them for fun.