134 lines
3.6 KiB
Plaintext
134 lines
3.6 KiB
Plaintext
import Common;
|
|
import DispatchParams;
|
|
import LightEnv;
|
|
|
|
struct ComputeShaderInput
|
|
{
|
|
uint3 groupID : SV_GroupID;
|
|
uint3 dispatchThreadID : SV_DispatchThreadID;
|
|
uint groupIndex : SV_GroupIndex;
|
|
};
|
|
struct CullingParams
|
|
{
|
|
Texture2D depthTexture;
|
|
|
|
globallycoherent RWStructuredBuffer<uint> oLightIndexCounter;
|
|
globallycoherent RWStructuredBuffer<uint> tLightIndexCounter;
|
|
|
|
RWStructuredBuffer<uint> oLightIndexList;
|
|
RWStructuredBuffer<uint> tLightIndexList;
|
|
|
|
RWTexture2D<uint2> oLightGrid;
|
|
RWTexture2D<uint2> tLightGrid;
|
|
};
|
|
|
|
ParameterBlock<CullingParams> pCullingParams;
|
|
|
|
groupshared uint uMinDepth;
|
|
groupshared uint uMaxDepth;
|
|
|
|
groupshared Frustum groupFrustum;
|
|
|
|
groupshared uint oLightCount;
|
|
groupshared uint oLightIndexStartOffset;
|
|
groupshared uint oLightList[1024];
|
|
|
|
groupshared uint tLightCount;
|
|
groupshared uint tLightIndexStartOffset;
|
|
groupshared uint tLightList[1024];
|
|
|
|
|
|
void oAppendLight(uint lightIndex)
|
|
{
|
|
uint index;
|
|
InterlockedAdd(oLightCount, 1, index);
|
|
if(index < 1024)
|
|
{
|
|
oLightList[index] = lightIndex;
|
|
}
|
|
}
|
|
|
|
void tAppendLight(uint lightIndex)
|
|
{
|
|
uint index;
|
|
InterlockedAdd(tLightCount, 1, index);
|
|
if(index < 1024)
|
|
{
|
|
tLightList[index] = lightIndex;
|
|
}
|
|
}
|
|
|
|
[numthreads(BLOCK_SIZE, BLOCK_SIZE, 1)]
|
|
[shader("compute")]
|
|
void cullLights(ComputeShaderInput in)
|
|
{
|
|
int2 texCoord = int2(in.dispatchThreadID.xy);
|
|
float fDepth = pCullingParams.depthTexture.Load(int3(texCoord, 0)).r;
|
|
|
|
uint uDepth = asuint(fDepth);
|
|
if(in.groupIndex == 0)
|
|
{
|
|
uMinDepth = 0xffffffff;
|
|
uMaxDepth = 0x0;
|
|
oLightCount = 0;
|
|
tLightCount = 0;
|
|
groupFrustum = pDispatchParams.frustums[in.groupID.x + (in.groupID.y * pDispatchParams.numThreadGroups.x)];
|
|
}
|
|
|
|
GroupMemoryBarrierWithGroupSync();
|
|
|
|
InterlockedMin(uMinDepth, uDepth);
|
|
InterlockedMax(uMaxDepth, uDepth);
|
|
|
|
GroupMemoryBarrierWithGroupSync();
|
|
|
|
float fMinDepth = asfloat(uMinDepth);
|
|
float fMaxDepth = asfloat(uMaxDepth);
|
|
|
|
float minDepthWS = clipToWorld(float4(0, 0, fMinDepth, 1)).z;
|
|
float maxDepthWS = clipToWorld(float4(0, 0, fMaxDepth, 1)).z;
|
|
float nearClipWS = clipToWorld(float4(0, 0, 0, 1)).z;
|
|
|
|
Plane maxPlane = {float3(0, 0, -1), -maxDepthWS};
|
|
|
|
for ( uint i = in.groupIndex; i < pLightEnv.numPointLights; i += BLOCK_SIZE * BLOCK_SIZE )
|
|
{
|
|
PointLight light = pLightEnv.pointLights[i];
|
|
#ifdef LIGHT_CULLING
|
|
if(light.insideFrustum(groupFrustum, light.getPosition(), nearClipWS, minDepthWS))
|
|
#endif
|
|
{
|
|
tAppendLight(i);
|
|
#ifdef LIGHT_CULLING
|
|
if(!light.insidePlane(maxPlane, light.getPosition()))
|
|
#endif
|
|
{
|
|
oAppendLight(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
GroupMemoryBarrierWithGroupSync();
|
|
|
|
if(in.groupIndex == 0)
|
|
{
|
|
InterlockedAdd(pCullingParams.oLightIndexCounter[0], oLightCount, oLightIndexStartOffset);
|
|
pCullingParams.oLightGrid[in.groupID.xy] = uint2(oLightIndexStartOffset, oLightCount);
|
|
|
|
InterlockedAdd(pCullingParams.tLightIndexCounter[0], tLightCount, tLightIndexStartOffset);
|
|
pCullingParams.tLightGrid[in.groupID.xy] = uint2(tLightIndexStartOffset, tLightCount);
|
|
}
|
|
GroupMemoryBarrierWithGroupSync();
|
|
|
|
for (uint j = in.groupIndex; j < oLightCount; j += BLOCK_SIZE * BLOCK_SIZE)
|
|
{
|
|
pCullingParams.oLightIndexList[oLightIndexStartOffset + j] = oLightList[j];
|
|
}
|
|
|
|
// For transparent geometry.
|
|
for ( uint k = in.groupIndex; k < tLightCount; k += BLOCK_SIZE * BLOCK_SIZE )
|
|
{
|
|
pCullingParams.tLightIndexList[tLightIndexStartOffset + k] = tLightList[k];
|
|
}
|
|
}
|