49 lines
1.8 KiB
Plaintext
49 lines
1.8 KiB
Plaintext
import Common;
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import Scene;
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groupshared MeshPayload p;
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groupshared uint head;
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groupshared Frustum viewFrustum;
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[numthreads(TASK_GROUP_SIZE, 1, 1)]
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[shader("amplification")]
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void taskMain(
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uint threadID: SV_GroupIndex,
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uint groupID: SV_GroupID
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){
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InstanceData instance = pScene.instances[pOffsets.instanceOffset + groupID];
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MeshData mesh = pScene.meshData[pOffsets.instanceOffset + groupID];
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if(threadID == 0)
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{
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head = 0;
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float3 origin = viewToModel(instance.inverseTransformMatrix, float4(0, 0, 0, 1)).xyz;
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const float offset = 0.0f;
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float3 corners[4] = {
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screenToModel(instance.inverseTransformMatrix, float4(offset, offset, -1.0f, 1.0f)).xyz,
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screenToModel(instance.inverseTransformMatrix, float4(pViewParams.screenDimensions.x - offset, offset, -1.0f, 1.0f)).xyz,
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screenToModel(instance.inverseTransformMatrix, float4(offset, pViewParams.screenDimensions.y - offset, -1.0f, 1.0f)).xyz,
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screenToModel(instance.inverseTransformMatrix, float4(pViewParams.screenDimensions - float2(offset, offset), -1.0f, 1.0f)).xyz
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};
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viewFrustum.sides[0] = computePlane(origin, corners[2], corners[0]);
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viewFrustum.sides[1] = computePlane(origin, corners[1], corners[3]);
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viewFrustum.sides[2] = computePlane(origin, corners[0], corners[1]);
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viewFrustum.sides[3] = computePlane(origin, corners[3], corners[2]);
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p.instanceId = pOffsets.instanceOffset + groupID;
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}
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GroupMemoryBarrierWithGroupSync();
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for(uint i = threadID; i < mesh.numMeshlets; i += TASK_GROUP_SIZE)
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{
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uint m = mesh.meshletOffset + i;
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MeshletDescription meshlet = pScene.meshletInfos[m];
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#ifdef VIEW_CULLING
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if(meshlet.bounding.insideFrustum(viewFrustum))
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#endif
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{
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uint index;
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InterlockedAdd(head, 1, index);
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p.culledMeshlets[index] = m;
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}
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}
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GroupMemoryBarrierWithGroupSync();
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DispatchMesh(head, 1, 1, p);
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} |