38 lines
1.4 KiB
HLSL
38 lines
1.4 KiB
HLSL
// Copyright Epic Games, Inc. All Rights Reserved.
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// Kernel for GPU implementation of Metadata Partition node.
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[numthreads(64, 1, 1)]
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void PCGMetadataPartitionCS(uint3 GroupId : SV_GroupID, uint GroupIndex : SV_GroupIndex)
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{
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// Mark the kernel as having executed. Must run before we early out via thread index, because the kernel is still 'executed' even if the number of
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// threads to iterate on is zero. Even if GetNumThreads() returns 0, the kernel will still have been dispatched on a single thread to set this flag.
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if (all(GroupId == 0) && GroupIndex == 0)
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{
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Out_SetAsExecutedInternal();
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}
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const uint ThreadIndex = GetUnWrappedDispatchThreadId(GroupId, GroupIndex, 64);
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uint In_DataIndex, In_ElementIndex;
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if (!In_GetThreadData(ThreadIndex, In_DataIndex, In_ElementIndex))
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{
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return;
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}
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if (In_IsPointRemoved(In_DataIndex, In_ElementIndex))
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{
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// Don't need to remove output point as we're appending points to the buffer below.
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return;
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}
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const int PartitionAttributeId = MetadataPartition_GetPartitionAttributeId();
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const int AttributeValue = In_GetStringKey(In_DataIndex, In_ElementIndex, PartitionAttributeId);
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uint Out_DataIndex, Out_ElementIndex;
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MetadataPartition_GetOutputIndices(In_DataIndex, AttributeValue, Out_DataIndex, Out_ElementIndex);
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// Write output point.
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PCG_COPY_ALL_ATTRIBUTES_TO_OUTPUT(Out, In, Out_DataIndex, Out_ElementIndex, In_DataIndex, In_ElementIndex);
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}
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