wehub-resource-sync
150 lines
3.8 KiB
HLSL
150 lines
3.8 KiB
HLSL
#include "shared/hash-functions.hlsl"
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#include "shared/noise-functions.hlsl"
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//#include "shared/particle.hlsl"
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#include "shared/point.hlsl"
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#include "shared/quat-functions.hlsl"
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// cbuffer CountConstants : register(b0)
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// {
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// int4 bufferCount;
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// };
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cbuffer EmitParameter : register(b0)
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{
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// float EmitterId;
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// float MaxEmitCount;
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// float LifeTime;
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// float EmitSize;
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// float4 Color;
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float Count;
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float Seed;
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};
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// cbuffer TimeConstants : register(b2)
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// {
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// float GlobalTime;
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// float Time;
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// float RunTime;
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// float BeatTime;
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// float LastFrameDuration;
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// }
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cbuffer Transforms : register(b1)
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{
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float4x4 CameraToClipSpace;
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float4x4 ClipSpaceToCamera;
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float4x4 WorldToCamera;
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float4x4 CameraToWorld;
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float4x4 WorldToClipSpace;
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float4x4 ClipSpaceToWorld;
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float4x4 ObjectToWorld;
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float4x4 WorldToObject;
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float4x4 ObjectToCamera;
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float4x4 ObjectToClipSpace;
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};
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// cbuffer MeshCounter : register(b4)
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// {
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// int4 faceCount;
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// };
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struct Face
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{
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float3 positions[3];
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float2 texCoords[3];
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float3 normals[3];
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int id;
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float normalizedFaceArea;
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float cdf;
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};
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uint wang_hash(in out uint seed)
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{
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seed = (seed ^ 61) ^ (seed >> 16);
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seed *= 9;
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seed = seed ^ (seed >> 4);
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seed *= 0x27d4eb2d;
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seed = seed ^ (seed >> 15);
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return seed;
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}
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StructuredBuffer<Face> FaceBuffer : t0;
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Texture2D<float4> inputTexture : register(t1);
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RWStructuredBuffer<LegacyPoint> points : u0;
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// ConsumeStructuredBuffer<ParticleIndex> DeadParticles : u1;
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//RWStructuredBuffer<Face> FaceBuffer : u2;
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SamplerState linearSampler : register(s0);
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[numthreads(160,1,1)]
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void main(uint3 i : SV_DispatchThreadID)
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{
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uint faceCount, stride;
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FaceBuffer.GetDimensions(faceCount, stride);
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// if (i.x >= (uint)bufferCount.x)
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// return;
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if (i.x >= (uint)Count)
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return;
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//uint bla = asint(BeatTime*1000) ^ i.x;
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uint rng_state = i.x*Seed; // todo hash12 with time as 2nd param
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float xi = (float(wang_hash(rng_state)) * (1.0 / 4294967296.0));
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// float3 hash = hash42(float2(BeatTime*1000, i.x*3*1000));
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// float xi = hash.x;
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uint cdfIndex = 0;
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while (cdfIndex < faceCount && xi > FaceBuffer[cdfIndex].cdf) // todo: make binary search
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{
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cdfIndex += 1;
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}
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uint index = cdfIndex;
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// if (index >= (uint)faceCount)
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// return;
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float xi1 = (float(wang_hash(rng_state)) * (1.0 / 4294967296.0));
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float xi2 = float(wang_hash(rng_state)) * (1.0 / 4294967296.0);
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Face f = FaceBuffer[index];
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// if (f.positions[0].z < 0.1 || f.positions[1].z < 0.1 || f.positions[2].z < 0.1)
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// return;
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float xi1Sqrt = sqrt(xi1);
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float u = 1.0 - xi1Sqrt;
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float v = xi2 * xi1Sqrt;
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float w = 1.0 - u - v;
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float3 pos = f.positions[0] * u + f.positions[1] * v + f.positions[2] * w;
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// ParticleIndex pi = DeadParticles.Consume();
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LegacyPoint newPoint = points[i.x];
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newPoint.Position = mul(float4(pos.xyz,1), ObjectToWorld);
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newPoint.W =1;
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newPoint.Rotation = float4(0,0,0,1);
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newPoint.Rotation = qLookAt(f.normals[0], float3(0,1,0));
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//newPoint.rotation = rot
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/*
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//float scale = 2;
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particle.position = mul(float4(pos.xyz,1), ObjectToWorld);
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particle.emitterId = EmitterId;
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particle.lifetime = LifeTime;
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//particle.emitTime = BeatTime;
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float size = 1.5;//EmitSize * Seed;
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particle.size = float2(size, size);
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particle.velocity = 0;//v0.normal*10;
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float2 texCoord = f.texCoords[0] * u + f.texCoords[1] * v + f.texCoords[2] * w;
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texCoord.y = 1.0 - texCoord.y;
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float4 color = float4(0.5, 0.5, 0.5, 1);//inputTexture.SampleLevel(linearSampler, texCoord, 0) * Color;
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particle.color = color;
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Particles[pi.index] = particle;
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*/
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points[i.x] = newPoint;
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}
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