ProbeOcclusionLightIndexMapping.compute

#pragma only_renderers d3d11 vulkan metal glcore
// See UnityComputeProbeIntegrator.IntegrateOcclusion()
#pragma kernel MapIndices

RWStructuredBuffer<int> g_PerProbeLightIndicesOutput;
StructuredBuffer<int> g_PerProbeLightIndicesInput;
StructuredBuffer<int> g_MappingTable;
uint g_PerProbeLightIndicesInputOffset;
uint g_MaxLightsPerProbe;
uint g_ProbeCount;

[numthreads(64,1,1)]
void MapIndices(uint3 id : SV_DispatchThreadID)
{
	if (id.x >= g_MaxLightsPerProbe * g_ProbeCount)
		return;

	for (uint i = 0; i < g_MaxLightsPerProbe; i++)
	{
		uint probeIdx = id.x * g_MaxLightsPerProbe + i;
		int inLightIdx = g_PerProbeLightIndicesInput[probeIdx + g_PerProbeLightIndicesInputOffset];
		if (inLightIdx < 0)
			g_PerProbeLightIndicesOutput[probeIdx] = -1;
		else
			g_PerProbeLightIndicesOutput[probeIdx] = g_MappingTable[inLightIdx];
	}
}