35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
import FluidGridData;
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struct Params
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{
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// read-write: phi to add source to
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FluidGridData<float> phi;
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FluidGridData<float> density;
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};
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ParameterBlock<Params> params;
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[shader("compute")]
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[numthreads(32, 8, 1)]
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void addSource(uint3 dispatchThreadID : SV_DispatchThreadID)
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{
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FluidGridData<float> phi = params.phi;
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FluidGridData<float> density = params.density;
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int x = dispatchThreadID.x + 1;
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int y = dispatchThreadID.y + 1;
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int z = dispatchThreadID.z + 1;
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if(x >= gridParams.gridSize.x - 1 || y >= gridParams.gridSize.y - 1 || z >= gridParams.gridSize.z - 1) return;
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// Add a spherical source and union it into the existing level set.
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float3 center = float3(gridParams.gridSize) * 0.5f;
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float radius = min(gridParams.gridSize.x, min(gridParams.gridSize.y, gridParams.gridSize.z)) * 0.25f;
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float3 pos = float3(x, y, z);
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float dist = length(pos - center);
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float sourcePhi = dist - radius;
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phi[x, y, z] = min(phi[x, y, z], sourcePhi);
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if (sourcePhi < 0.0f)
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{
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density[x, y, z] += 0.5f;
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density[x, y, z] = min(density[x, y, z], 1.0f);
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}
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} |