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Fixed water rendering somewhat

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Dynamitos
2024-08-21 10:24:37 +02:00
parent 81090d78f0
commit fcdb132d49
8 changed files with 62 additions and 54 deletions
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res/shaders/WaterCompute.slang
+2 -16
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@@ -157,7 +157,7 @@ void CS_InitializeSpectrum(uint3 id : SV_DISPATCHTHREADID) {
pParams.initialSpectrumTextures[uint3(id.xy, i)] = float4(float2(gauss2.x, gauss1.y) * sqrt(2 * spectrum * abs(dOmegadk) / kLength * deltaK * deltaK), 0.0f, 0.0f);
} else {
pParams.initialSpectrumTextures[uint3(id.xy, i)] = 0.0f;
pParams.initialSpectrumTextures[uint3(id.xy, i)] = 1.0f;
}
}
}
@@ -221,20 +221,6 @@ void CS_UpdateSpectrumForFFT(uint3 id : SV_DISPATCHTHREADID) {
}
}
float2 ComplexExp(float2 a) {
return float2(cos(a.y), sin(a.y) * exp(a.x));
}
float4 ComputeTwiddleFactorAndInputIndices(uint2 id) {
uint b = pParams.N >> (id.x + 1);
float2 mult = 2 * PI * float2(0.0f, 1.0f) / pParams.N;
uint i = (2 * b * (id.y / b) + id.y % b) % pParams.N;
float2 twiddle = ComplexExp(-mult * ((id.y / b) * b));
return float4(twiddle, i, i + b);
}
#define SIZE 1024
#define LOG_SIZE 10
@@ -264,7 +250,7 @@ float4 FFT(uint threadIndex, float4 input) {
ButterflyValues(step, threadIndex, inputsIndices, twiddle);
float4 v = fftGroupBuffer[uint(flag)][inputsIndices.y];
fftGroupBuffer[uint(flag)][threadIndex] = fftGroupBuffer[uint(flag)][inputsIndices.x] + float4(ComplexMult(twiddle, v.xy), ComplexMult(twiddle, v.zw));
fftGroupBuffer[uint(!flag)][threadIndex] = fftGroupBuffer[uint(flag)][inputsIndices.x] + float4(ComplexMult(twiddle, v.xy), ComplexMult(twiddle, v.zw));
flag = !flag;
GroupMemoryBarrierWithGroupSync();