Turánszki János
38 lines
1.1 KiB
HLSL
38 lines
1.1 KiB
HLSL
#include "globals.hlsli"
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#include "ShaderInterop_SurfelGI.h"
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StructuredBuffer<Surfel> surfelBuffer : register(t0);
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StructuredBuffer<uint> surfelAliveBuffer : register(t1);
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ByteAddressBuffer surfelStatsBuffer : register(t2);
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RWStructuredBuffer<SurfelGridCell> surfelGridBuffer : register(u0);
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RWStructuredBuffer<uint> surfelCellBuffer : register(u1);
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[numthreads(SURFEL_INDIRECT_NUMTHREADS, 1, 1)]
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void main(uint3 DTid : SV_DispatchThreadID)
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{
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uint surfel_count = surfelStatsBuffer.Load(SURFEL_STATS_OFFSET_COUNT);
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if (DTid.x >= surfel_count)
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return;
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uint surfel_index = surfelAliveBuffer[DTid.x];
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Surfel surfel = surfelBuffer[surfel_index];
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if (surfel.GetRadius() > 0)
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{
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int3 center_cell = surfel_cell(surfel.position);
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for (uint i = 0; i < 27; ++i)
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{
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int3 gridpos = center_cell + surfel_neighbor_offsets[i];
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if (surfel_cellintersects(surfel, gridpos))
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{
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uint cellindex = surfel_cellindex(gridpos);
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uint prevCount;
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InterlockedAdd(surfelGridBuffer[cellindex].count, 1, prevCount);
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surfelCellBuffer[surfelGridBuffer[cellindex].offset + prevCount] = surfel_index;
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}
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}
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}
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}
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