109 lines
3.3 KiB
Plaintext
109 lines
3.3 KiB
Plaintext
import Common;
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import BRDF;
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import Scene;
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import VertexData;
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import MaterialParameter;
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struct MeshPayload
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{
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uint instanceId[MAX_MESHLETS_PER_MESH];
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uint meshletId[MAX_MESHLETS_PER_MESH];
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};
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groupshared MeshPayload p;
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groupshared uint head;
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groupshared float4x4 localToView;
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groupshared Frustum viewFrustum;
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[numthreads(TASK_GROUP_SIZE, 1, 1)]
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[outputtopology("triangle")]
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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[groupID];
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if(threadID == 0)
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{
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head = 0;
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localToView = mul(pViewParams.viewMatrix, instance.transformMatrix);
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float3 origin = float3(0, 0, 0);
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float3 corners[4] = {
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screenToView(float4(0.0f, 0.0f, -1.0f, 1.0f)).xyz,
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screenToView(float4(pViewParams.screenDimensions.x, 0.0f, -1.0f, 1.0f)).xyz,
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screenToView(float4(0.0f, pViewParams.screenDimensions.y, -1.0f, 1.0f)).xyz,
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screenToView(float4(pViewParams.screenDimensions, -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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}
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GroupMemoryBarrierWithGroupSync();
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MeshData mesh = pScene.meshData[groupID];
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for(uint i = threadID; i < MAX_MESHLETS_PER_MESH; i += TASK_GROUP_SIZE)
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{
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if(i < mesh.numMeshlets)
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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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if(meshlet.bounding.insideFrustum(localToView, viewFrustum))
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{
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uint index;
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InterlockedAdd(head, 1, index);
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p.meshletId[index] = m;
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p.instanceId[index] = groupID + pScene.primitiveIndices[m];
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}
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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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}
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struct PrimitiveAttributes
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{
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uint cull: SV_CullPrimitive;
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};
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uint unpackPrimitiveIndices(uint index)
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{
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uint32_t packed = pScene.primitiveIndices[index / 4];
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return (packed >> (index % 4)) & 0xff;
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}
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[numthreads(MESH_GROUP_SIZE, 1, 1)]
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[outputtopology("triangle")]
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[shader("mesh")]
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void meshMain(
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in uint threadID: SV_GroupIndex,
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in uint groupID: SV_GroupID,
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in payload MeshPayload meshPayload,
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out vertices FragmentParameter vertices[MAX_VERTICES],
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out indices uint3 indices[MAX_PRIMITIVES]
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){
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InstanceData inst = pScene.instances[meshPayload.instanceId[groupID]];
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MeshData md = pScene.meshData[meshPayload.instanceId[groupID]];
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MeshletDescription m = pScene.meshletInfos[meshPayload.meshletId[groupID]];
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SetMeshOutputCounts(m.vertexCount, m.primitiveCount);
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for(uint i = threadID; i < MAX_PRIMITIVES; i += MESH_GROUP_SIZE)
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{
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uint p = min(i, m.primitiveCount - 1);
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{
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uint local_idx0 = pScene.primitiveIndices[m.primitiveOffset + (p * 3) + 0];
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uint local_idx1 = pScene.primitiveIndices[m.primitiveOffset + (p * 3) + 1];
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uint local_idx2 = pScene.primitiveIndices[m.primitiveOffset + (p * 3) + 2];
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indices[p] = uint3(local_idx0, local_idx1, local_idx2);
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}
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}
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for(uint i = threadID; i < MAX_VERTICES; i+=MESH_GROUP_SIZE)
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{
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uint v = min(i, m.vertexCount - 1);
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{
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uint vertexIndex = pScene.vertexIndices[m.vertexOffset + v];
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VertexAttributes attr = pVertexData.getAttributes(md.indicesOffset + vertexIndex);
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vertices[v] = attr.getParameter(inst.transformMatrix);
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vertices[v].vertexColor = m.color;
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}
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}
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} |