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1d8d099a5b
Additionally cleaned up numerical logic within the UV Packer code and added comments for confusing areas of the code. #jira UE-217881 #rb lonnie.li [CL 35382850 by nathan mitchell in ue5-main branch]
123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Parameterization/MeshUVPacking.h"
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#include "DynamicSubmesh3.h"
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#include "Selections/MeshConnectedComponents.h"
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// the generic GeometricObjects version
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#include "Parameterization/UVPacking.h"
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using namespace UE::Geometry;
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namespace UE::Geometry
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{
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struct FUVOverlayView : public FUVPacker::IUVMeshView
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{
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FDynamicMesh3* Mesh;
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FDynamicMeshUVOverlay* UVOverlay;
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FUVOverlayView(FDynamicMeshUVOverlay* UVOverlay) : UVOverlay(UVOverlay)
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{
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Mesh = UVOverlay->GetParentMesh();
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}
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virtual FIndex3i GetTriangle(int32 TID) const
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{
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return Mesh->GetTriangle(TID);
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}
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virtual FIndex3i GetUVTriangle(int32 TID) const
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{
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return UVOverlay->GetTriangle(TID);
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}
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virtual FVector3d GetVertex(int32 VID) const
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{
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return Mesh->GetVertex(VID);
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}
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virtual FVector2f GetUV(int32 EID) const
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{
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return UVOverlay->GetElement(EID);
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}
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virtual void SetUV(int32 EID, FVector2f UV)
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{
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return UVOverlay->SetElement(EID, UV);
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}
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};
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}
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FDynamicMeshUVPacker::FDynamicMeshUVPacker(FDynamicMeshUVOverlay* UVOverlayIn)
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{
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UVOverlay = UVOverlayIn;
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}
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FDynamicMeshUVPacker::FDynamicMeshUVPacker(FDynamicMeshUVOverlay* UVOverlayIn, TUniquePtr<TArray<int32>>&& TidsToRepackIn)
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{
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UVOverlay = UVOverlayIn;
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TidsToRepack = MoveTemp(TidsToRepackIn);
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}
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bool FDynamicMeshUVPacker::StandardPack()
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{
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TRACE_CPUPROFILER_EVENT_SCOPE(DynamicMeshUVPacker_StandardPack);
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FUVPacker Packer;
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Packer.bPreserveScale = bPreserveScale;
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Packer.bPreserveRotation = bPreserveRotation;
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Packer.bAllowFlips = bAllowFlips;
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Packer.GutterSize = GutterSize;
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Packer.TextureResolution = TextureResolution;
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Packer.bScaleIslandsByWorldSpaceTexelRatio = bScaleIslandsByWorldSpaceTexelRatio;
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FUVOverlayView MeshView(UVOverlay);
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FMeshConnectedComponents UVComponents = CollectUVIslandsToPack(MeshView);
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return Packer.StandardPack(&MeshView, UVComponents.Num(), [&UVComponents](int Idx, TArray<int32>& Island)
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{
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Island = UVComponents.GetComponent(Idx).Indices;
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});
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}
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bool FDynamicMeshUVPacker::StackPack()
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{
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TRACE_CPUPROFILER_EVENT_SCOPE(DynamicMeshUVPacker_StackPack);
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FUVPacker Packer;
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Packer.bPreserveScale = bPreserveScale;
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Packer.bPreserveRotation = bPreserveRotation;
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Packer.bAllowFlips = bAllowFlips;
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Packer.GutterSize = GutterSize;
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Packer.TextureResolution = TextureResolution;
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Packer.bScaleIslandsByWorldSpaceTexelRatio = bScaleIslandsByWorldSpaceTexelRatio;
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FUVOverlayView MeshView(UVOverlay);
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FMeshConnectedComponents UVComponents = CollectUVIslandsToPack(MeshView);
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return Packer.StackPack(&MeshView, UVComponents.Num(), [&UVComponents](int Idx, TArray<int32>& Island)
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{
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Island = UVComponents.GetComponent(Idx).Indices;
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});
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}
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FMeshConnectedComponents FDynamicMeshUVPacker::CollectUVIslandsToPack(const FUVOverlayView& MeshView)
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{
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auto UVIslandPredicate = [&MeshView](int32 Triangle0, int32 Triangle1)
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{
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return MeshView.UVOverlay->AreTrianglesConnected(Triangle0, Triangle1);
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};
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FMeshConnectedComponents UVComponents(MeshView.Mesh);
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if (TidsToRepack)
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{
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UVComponents.FindConnectedTriangles(*TidsToRepack, UVIslandPredicate);
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}
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else
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{
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UVComponents.FindConnectedTriangles(UVIslandPredicate);
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}
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return UVComponents;
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} |