Minimal Compute Shader Examples

Minimal test scenes contains compute shaders, compute buffers etc Playing with the transport between CPU <-> GPU

Unity version : 6000.3 (Unity 6.3), 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		The most basic one, edit texture with compute shader, shader takes the texture for rendering
01_2_FallingSand		Example of using compute to animate texture pixels
01_3_Fluid_2D		GPU Fluid. Ref to Scrawk/GPU-GEMS-2D-Fluid-Simulation
01_4_Fluid_3D		A 3D version based on above GPU Fluid
🔷 02_StructuredBuffer 🔷
02_1_StructuredBufferNoCompute		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		Paint the texture by sending object positions to compute shader with StructuredBuffer
02_3_RotatingCircles		Similar to above, just another playground scene
02_4_ComputePaintTexture_DFT		Similar to above but drawing with Epicycles using Discrete Fourier Transform. Ref to The Coding Train's youtube video
02_5_ComputeParticlesDirect		GPU Particle, drawing fixed no. of particles
02_6_ComputeSketch		Draw quads on the screen with color filled by compute shader
02_7_ShimmerSphere		Pass spheres position and radius to quad material for a fake shimmer effect
🔷 03_GPU_to_CPU 🔷
03_1_StructuredBufferWithCompute		Another basic one, use compute to calculate some data and send back to CPU
03_2_AsyncGPUReadback		Similar to StructuredBufferWithCompute, but use AsyncGPUReadback to get array data back to CPU
03_3_AsyncGPUReadbackTex		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		Update mesh vertices with compute + AsyncGPUReadback to get the vertex data back to CPU for physics
03_5_AsyncGPUReadbackMesh_NewMeshAPI		Same as above but using the new Mesh API
03_6_PixelPercentage		Count the filled pixel percentage
03_7_ColorPalette		Find the top colors and replace them
🔷 04_Indirect 🔷
04_1_IndirectCompute		Simple indirect compute (indirect dispatch) and CopyCount
04_2_ComputeParticlesIndirect		GPU Particle, drawing dynamic no. of particles, no need to read back to CPU!
04_3_ComputeParticlesIndirect_VFX		Implementation of above scene with VFX graph
04_4_IndirectReflectedStar		Draw stars on the screen only if the pixels are bright enough
🔷 05_Shader_to_CPU 🔷
05_1_UAVInShader		Read some data back to CPU from fragment shader
05_2_ShaderBakeToTexture		Bake shader pixel result to texture
🔷 06_Compute_Mesh 🔷
06_1_ComputeVertex		Replace vertex buffer with StructuredBuffer and drive vertex displacement by compute
06_2_ComputeVertexLit		A usecase of above, with different shader passes share the same vertex data
06_3_SkinnedMeshBuffer_SameMesh		Blend the vertex data from 2 SkinnedMeshRenderer vertex buffer and render it with MeshRenderer
06_4_SkinnedMeshBuffer_DiffMesh		Similar to above but blending 2 different SkinnedMeshes. The blended triangles are drawn with DrawMeshInstancedIndirect()
06_5_VFXGraphMeshDeform		Using VFX Graph to deforming mesh (particle as vertex)

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Disclaimer: The stuff here might not be the best practice / optimized :'(. But at least they works. Play them for fun.