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#jira UETOOL-3823 #rb ryan.schmidt #ROBOMERGE-SOURCE: CL 16958628 in //UE5/Main/... #ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v838-16927207) [CL 16958640 by michael balzer in ue5-release-engine-test branch]
96 lines
2.0 KiB
C++
96 lines
2.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "MathUtil.h"
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#include "VectorTypes.h"
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#include "GeometryTypes.h"
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#include "MeshRegionBoundaryLoops.h"
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namespace UE
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{
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namespace Geometry
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{
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class FDynamicMesh3;
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class FMeshNormals;
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/**
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* FJoinMeshLoops connects two open loops of a mesh with a quad-strip.
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* A 1-1 match between the loop vertices is assumed.
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*
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* The fill strip currently is configured so that:
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* - entire strip is assigned a new face group
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* - the entire strip becomes a separate "normal island", ie hard normals at border with existing mesh
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* - the strip is unwrapped into a UV rectangle starting at vertex 0 and ending back at 0 again
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*/
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class DYNAMICMESH_API FJoinMeshLoops
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{
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public:
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//
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// Inputs
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//
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/** The mesh that we are modifying */
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FDynamicMesh3* Mesh;
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/** quads on the stitch loop are scaled by this amount */
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float UVScaleFactor = 1.0f;
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// first loop
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TArray<int32> LoopA;
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// second loop
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TArray<int32> LoopB;
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//
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// Outputs
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//
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// quads along the join strip, in order of loops. Each quad is two triangle indices
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TArray<FIndex2i> JoinQuads;
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// triangles of the quads flattend out (convenient), ie size = 2*NumQuads
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TArray<int32> JoinTriangles;
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// groups created by the operation (currently 1)
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TArray<int32> NewGroups;
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// group for each quad, ie size = NumQuads (currently all have same value)
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TArray<int32> QuadGroups;
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public:
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FJoinMeshLoops(FDynamicMesh3* Mesh);
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FJoinMeshLoops(FDynamicMesh3* Mesh, const TArray<int32>& LoopA, const TArray<int32>& LoopB);
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virtual ~FJoinMeshLoops() {}
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/**
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* @return EOperationValidationResult::Ok if we can apply operation, or error code if we cannot
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*/
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virtual EOperationValidationResult Validate()
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{
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if (LoopA.Num() != LoopB.Num())
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{
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return EOperationValidationResult::Failed_InvalidTopology;
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}
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return EOperationValidationResult::Ok;
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}
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/**
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* Apply the Extrude operation to the input mesh.
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* @return true if the algorithm succeeds
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*/
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virtual bool Apply();
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protected:
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};
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} // end namespace UE::Geometry
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} // end namespace UE
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