#include <TriangleMesh.h>

Public Types
template<typename T >
using	TBVHType = TAABBTree< int32, TAABBTreeLeafArray< int32, false, T >, true, T >

template<typename T >
using	TSpatialHashType = THierarchicalSpatialHash< int32, T >

Public Member Functions
CHAOS_API	FTriangleMesh ()

CHAOS_API	FTriangleMesh (TArray< TVec3< int32 > > &&Elements, const int32 StartIdx=0, const int32 EndIdx=-1, const bool CullDegenerateElements=true)

	FTriangleMesh (const FTriangleMesh &Other)=delete

CHAOS_API	FTriangleMesh (FTriangleMesh &&Other)

CHAOS_API	~FTriangleMesh ()

CHAOS_API void	Init (TArray< TVec3< int32 > > &&Elements, const int32 StartIdx=0, const int32 EndIdx=-1, const bool CullDegenerateElements=true)

CHAOS_API void	Init (const TConstArrayView< TVec3< int32 > > &Elements, const int32 StartIdx=0, const int32 EndIdx=-1, const bool CullDegenerateElements=true)

CHAOS_API void	ResetAuxiliaryStructures ()

CHAOS_API void	Serialize (FArchive &Ar)

CHAOS_API TVec2< int32 >	GetVertexRange () const

int32	GetStartIndex () const

int32	GetNumIndices () const

CHAOS_API TSet< int32 >	GetVertices () const

CHAOS_API void	GetVertexSet (TSet< int32 > &VertexSet) const

CHAOS_API void	GetVertexSetAsArray (TArray< int32 > &VertexSet) const

FORCEINLINE void	ExpandVertexRange (const int32 StartIdx, const int32 EndIdx)

FORCEINLINE const TArray< TVec3< int32 > > &	GetElements () const &

FORCEINLINE TArray< TVec3< int32 > >	GetElements () &&

FORCEINLINE const TArray< TVec3< int32 > > &	GetSurfaceElements () const &

FORCEINLINE TArray< TVec3< int32 > >	GetSurfaceElements () &&

FORCEINLINE int32	GetNumElements () const

CHAOS_API const TMap< int32, TSet< int32 > > &	GetPointToNeighborsMap () const

FORCEINLINE const TSet< int32 > &	GetNeighbors (const int32 Element) const

CHAOS_API TConstArrayView< TArray< int32 > >	GetPointToTriangleMap () const

FORCEINLINE const TArray< int32 > &	GetCoincidentTriangles (const int32 Element) const

FORCEINLINE TSet< int32 >	GetNRing (const int32 Element, const int32 N) const

CHAOS_API TArray< Chaos::TVec2< int32 > >	GetUniqueAdjacentPoints () const

CHAOS_API TArray< Chaos::TVec4< int32 > >	GetUniqueAdjacentElements () const

template<typename T >
CHAOS_API TArray< TVec3< T > >	GetFaceNormals (const TConstArrayView< TVec3< T > > &Points, const bool ReturnEmptyOnError=true) const

template<typename T >
CHAOS_API void	GetFaceNormals (TArray< TVec3< T > > &Normals, const TConstArrayView< TVec3< T > > &Points, const bool ReturnEmptyOnError=true) const

FORCEINLINE TArray< FVec3 >	GetFaceNormals (const FParticles &InParticles, const bool ReturnEmptyOnError=true) const

CHAOS_API TArray< FVec3 >	GetPointNormals (const TConstArrayView< FVec3 > &points, const bool ReturnEmptyOnError=true, const bool bUseGlobalArray=false)

FORCEINLINE TArray< FVec3 >	GetPointNormals (const FParticles &InParticles, const bool ReturnEmptyOnError=true)

CHAOS_API void	GetPointNormals (TArrayView< FVec3 > PointNormals, const TConstArrayView< FVec3 > &FaceNormals, const bool bUseGlobalArray)

template<typename T >
CHAOS_API void	GetPointNormals (TArrayView< TVec3< T > > PointNormals, const TConstArrayView< TVec3< T > > &FaceNormals, const bool bUseGlobalArray) const
	Get per-point normals. This const version of this function requires `GetPointToTriangleMap()` to be called prior to invoking this function.

CHAOS_API void	GetPointNormals (TArrayView< TVec3< FRealSingle > > PointNormals, const TConstArrayView< TVec3< FRealSingle > > &FaceNormals, const bool bUseGlobalArray) const

CHAOS_API const FSegmentMesh &	GetSegmentMesh () const
	Note that the SegmentMesh is lazily calculated (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret The connectivity of this mesh represented as a collection of unique segments.

CHAOS_API const TArray< TVec3< int32 > > &	GetFaceToEdges () const
	Note that this data is lazily calculated with the SegmentMesh (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret A map from all face indices, to the indices of their associated edges.

CHAOS_API const TArray< TVec2< int32 > > &	GetEdgeToFaces () const
	Note that this data is lazily calculated with the SegmentMesh (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret A map from all edge indices, to the indices of their containing faces.

CHAOS_API TArray< FReal >	GetCurvatureOnEdges (const TArray< FVec3 > &faceNormals)

CHAOS_API TArray< FReal >	GetCurvatureOnEdges (const TConstArrayView< FVec3 > &points)
	Helper that generates face normals on the fly.

CHAOS_API TArray< FReal >	GetCurvatureOnPoints (const TArray< FReal > &edgeCurvatures)

CHAOS_API TArray< FReal >	GetCurvatureOnPoints (const TConstArrayView< FVec3 > &points)
	Helper that generates edge curvatures on the fly.

CHAOS_API TSet< int32 >	GetBoundaryPoints ()

CHAOS_API TMap< int32, int32 >	FindCoincidentVertexRemappings (const TArray< int32 > &TestIndices, const TConstArrayView< FVec3 > &Points)

CHAOS_API TArray< int32 >	GetVertexImportanceOrdering (const TConstArrayView< FVec3 > &Points, const TArray< FReal > &PointCurvatures, TArray< int32 > *CoincidentVertices=nullptr, const bool RestrictToLocalIndexRange=false)

CHAOS_API TArray< int32 >	GetVertexImportanceOrdering (const TConstArrayView< FVec3 > &Points, TArray< int32 > *CoincidentVertices=nullptr, const bool RestrictToLocalIndexRange=false)
	Helper that generates point curvatures on the fly.

CHAOS_API void	RemapVertices (const TArray< int32 > &Order)
	Reorder vertices according to.

CHAOS_API void	RemapVertices (const TMap< int32, int32 > &Remapping)

CHAOS_API void	RemoveDuplicateElements ()

CHAOS_API void	RemoveDegenerateElements ()

template<typename T >
void	BuildBVH (const TConstArrayView< TVec3< T > > &Points, TBVHType< T > &BVH) const

template<typename T >
bool	PointProximityQuery (const TBVHType< T > &BVH, const TConstArrayView< TVec3< T > > &Points, const int32 PointIndex, const TVec3< T > &PointPosition, const T PointThickness, const T ThisThickness, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

template<typename T >
bool	EdgeIntersectionQuery (const TBVHType< T > &BVH, const TConstArrayView< TVec3< T > > &Points, const int32 EdgeIndex, const TVec3< T > &EdgePosition1, const TVec3< T > &EdgePosition2, TFunctionRef< bool(const int32 EdgeIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

template<typename T >
bool	SmoothProject (const TBVHType< T > &BVH, const TConstArrayView< FVec3 > &Points, const TArray< FVec3 > &PointNormals, const FVec3 &Point, int32 &TriangleIndex, FVec3 &Weights, const int32 MaxIters=10) const
	Returns `false` if `Point` is outside of the smooth normal cone, where a smooth projection doesn't exist.

template<typename T >
CHAOS_API void	BuildSpatialHash (const TConstArrayView< TVec3< T > > &Points, TSpatialHashType< T > &SpatialHash, const T MinSpatialLodSize=(T) 0.) const

CHAOS_API void	BuildSpatialHash (const TConstArrayView< TVec3< FRealSingle > > &Points, TSpatialHashType< FRealSingle > &SpatialHash, const Softs::FPBDFlatWeightMap &PointThicknesses, int32 ThicknessMapIndexOffset, const FRealSingle MinSpatialLodSize=0.f) const

template<typename T >
CHAOS_API bool	PointProximityQuery (const TSpatialHashType< T > &SpatialHash, const TConstArrayView< TVec3< T > > &Points, const int32 PointIndex, const TVec3< T > &PointPosition, const T PointThickness, const T ThisThickness, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

CHAOS_API bool	PointProximityQuery (const TSpatialHashType< FRealSingle > &SpatialHash, const TConstArrayView< TVec3< FRealSingle > > &Points, const int32 PointIndex, const TVec3< FRealSingle > &PointPosition, const FRealSingle PointThickness, const Softs::FPBDFlatWeightMap &ThisThicknesses, const FRealSingle ThisThicknessExtraMultiplier, int32 ThicknessMapIndexOffset, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< FRealSingle > > &Result) const

template<typename T >
CHAOS_API bool	PointClosestTriangleQuery (const TSpatialHashType< T > &SpatialHash, const TConstArrayView< TVec3< T > > &Points, const int32 PointIndex, const TVec3< T > &PointPosition, const T PointThickness, const T ThisThickness, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

template<typename T >
bool	EdgeIntersectionQuery (const TSpatialHashType< T > &SpatialHash, const TConstArrayView< TVec3< T > > &Points, const int32 EdgeIndex, const TVec3< T > &EdgePosition1, const TVec3< T > &EdgePosition2, TFunctionRef< bool(const int32 EdgeIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

template<typename T >
void	GetFaceNormals (TArray< TVec3< T > > &Normals, const TConstArrayView< TVec3< T > > &Points, const bool ReturnEmptyOnError) const

template<typename T >
TArray< TVec3< T > >	GetFaceNormals (const TConstArrayView< TVec3< T > > &Points, const bool ReturnEmptyOnError) const

template<typename T >
void	GetPointNormals (TArrayView< TVec3< T > > PointNormals, const TConstArrayView< TVec3< T > > &FaceNormals, const bool bUseGlobalArray) const

template<>
CHAOS_API void	GetPointNormals (TArrayView< TVec3< FRealSingle > > PointNormals, const TConstArrayView< TVec3< FRealSingle > > &FaceNormals, const bool bUseGlobalArray) const

template<typename T >
void	BuildSpatialHash (const TConstArrayView< TVec3< T > > &Points, TSpatialHashType< T > &SpatialHash, const T MinSpatialLodSize) const

template<typename T >
bool	PointProximityQuery (const TSpatialHashType< T > &SpatialHash, const TConstArrayView< TVec3< T > > &Points, const int32 PointIndex, const TVec3< T > &PointPosition, const T PointThickness, const T ThisThickness, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

template<typename T >
bool	PointClosestTriangleQuery (const TSpatialHashType< T > &SpatialHash, const TConstArrayView< TVec3< T > > &Points, const int32 PointIndex, const TVec3< T > &PointPosition, const T PointThickness, const T ThisThickness, TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)> BroadphaseTest, TArray< TTriangleCollisionPoint< T > > &Result) const

Static Public Member Functions
static CHAOS_API FTriangleMesh	GetConvexHullFromParticles (const TConstArrayView< FVec3 > &points)

static FORCEINLINE FTriangleMesh	GetConvexHullFromParticles (const FParticles &InParticles)

template<typename T >
static FORCEINLINE void	InitEquilateralTriangleXY (FTriangleMesh &TriMesh, TParticles< T, 3 > &Particles)

template<typename T >
static FORCEINLINE void	InitEquilateralTriangleYZ (FTriangleMesh &TriMesh, TParticles< T, 3 > &Particles)

Member Typedef Documentation

◆ TBVHType

template<typename T >

using Chaos::FTriangleMesh::TBVHType = TAABBTree<int32, TAABBTreeLeafArray<int32, false, T>, true, T>

◆ TSpatialHashType

template<typename T >

using Chaos::FTriangleMesh::TSpatialHashType = THierarchicalSpatialHash<int32, T>

Constructor & Destructor Documentation

◆ FTriangleMesh() [1/4]

Chaos::FTriangleMesh::FTriangleMesh ( )

◆ FTriangleMesh() [2/4]

Chaos::FTriangleMesh::FTriangleMesh	(	TArray< TVec3< int32 > > &&	Elements,
		const int32	StartIdx = `0`,
		const int32	EndIdx = `-1`,
		const bool	CullDegenerateElements = `true`
	)

◆ FTriangleMesh() [3/4]

Chaos::FTriangleMesh::FTriangleMesh ( const FTriangleMesh & Other )

delete

◆ FTriangleMesh() [4/4]

Chaos::FTriangleMesh::FTriangleMesh ( FTriangleMesh && Other )

◆ ~FTriangleMesh()

Chaos::FTriangleMesh::~FTriangleMesh ( )

Member Function Documentation

◆ BuildBVH()

template<typename T >

template CHAOS_API void Chaos::FTriangleMesh::BuildBVH< FRealDouble >	(	const TConstArrayView< TVec3< T > > &	Points,
		TBVHType< T > &	BVH
	)		const

◆ BuildSpatialHash() [1/3]

CHAOS_API void Chaos::FTriangleMesh::BuildSpatialHash	(	const TConstArrayView< TVec3< FRealSingle > > &	Points,
		TSpatialHashType< FRealSingle > &	SpatialHash,
		const Softs::FPBDFlatWeightMap &	PointThicknesses,
		int32	ThicknessMapIndexOffset,
		const FRealSingle	MinSpatialLodSize = `0.f`
	)		const

◆ BuildSpatialHash() [2/3]

template<typename T >

void Chaos::FTriangleMesh::BuildSpatialHash	(	const TConstArrayView< TVec3< T > > &	Points,
		TSpatialHashType< T > &	SpatialHash,
		const T	MinSpatialLodSize
	)		const

◆ BuildSpatialHash() [3/3]

template<typename T >

CHAOS_API void Chaos::FTriangleMesh::BuildSpatialHash	(	const TConstArrayView< TVec3< T > > &	Points,
		TSpatialHashType< T > &	SpatialHash,
		const T	MinSpatialLodSize = `(T) 0.`
	)		const

◆ EdgeIntersectionQuery() [1/2]

template<typename T >

bool Chaos::FTriangleMesh::EdgeIntersectionQuery	(	const TBVHType< T > &	BVH,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	EdgeIndex,
		const TVec3< T > &	EdgePosition1,
		const TVec3< T > &	EdgePosition2,
		TFunctionRef< bool(const int32 EdgeIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ EdgeIntersectionQuery() [2/2]

template<typename T >

bool Chaos::FTriangleMesh::EdgeIntersectionQuery	(	const TSpatialHashType< T > &	SpatialHash,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	EdgeIndex,
		const TVec3< T > &	EdgePosition1,
		const TVec3< T > &	EdgePosition2,
		TFunctionRef< bool(const int32 EdgeIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ ExpandVertexRange()

FORCEINLINE void Chaos::FTriangleMesh::ExpandVertexRange	(	const int32	StartIdx,
		const int32	EndIdx
	)

inline

Extends the vertex range.

Since the vertex range is built from connectivity, it won't include any free vertices that either precede the first vertex, or follow the last.

◆ FindCoincidentVertexRemappings()

TMap< int32, int32 > Chaos::FTriangleMesh::FindCoincidentVertexRemappings	(	const TArray< int32 > &	TestIndices,
		const TConstArrayView< FVec3 > &	Points
	)

Find vertices that are coincident within the subset

Parameters

TestIndices	of given coordinates
Points,and	return a correspondence mapping from redundant vertex index to consolidated vertex index.

◆ GetBoundaryPoints()

TSet< int32 > Chaos::FTriangleMesh::GetBoundaryPoints ( )

Get the set of point indices that live on the boundary (an edge with only 1 coincident face).

◆ GetCoincidentTriangles()

FORCEINLINE const TArray< int32 > & Chaos::FTriangleMesh::GetCoincidentTriangles ( const int32 Element ) const

inline

◆ GetConvexHullFromParticles() [1/2]

static FORCEINLINE FTriangleMesh Chaos::FTriangleMesh::GetConvexHullFromParticles ( const FParticles & InParticles )

inlinestatic

Deprecated. Use TArrayView version.

◆ GetConvexHullFromParticles() [2/2]

FTriangleMesh Chaos::FTriangleMesh::GetConvexHullFromParticles ( const TConstArrayView< FVec3 > & points )

static

◆ GetCurvatureOnEdges() [1/2]

TArray< FReal > Chaos::FTriangleMesh::GetCurvatureOnEdges ( const TArray< FVec3 > & faceNormals )

@ret Curvature between adjacent faces, specified on edges in radians.

Parameters

faceNormals - a normal per face. Curvature between adjacent faces is measured by the angle between face normals, where a curvature of 0 means they're coplanar.

◆ GetCurvatureOnEdges() [2/2]

TArray< FReal > Chaos::FTriangleMesh::GetCurvatureOnEdges ( const TConstArrayView< FVec3 > & points )

Helper that generates face normals on the fly.

◆ GetCurvatureOnPoints() [1/2]

TArray< FReal > Chaos::FTriangleMesh::GetCurvatureOnPoints ( const TArray< FReal > & edgeCurvatures )

@ret The maximum curvature at points from connected edges, specified in radians.

Parameters

edgeCurvatures - a curvature per edge. The greater the number, the sharper the crease. -FLT_MAX denotes free particles.

◆ GetCurvatureOnPoints() [2/2]

TArray< FReal > Chaos::FTriangleMesh::GetCurvatureOnPoints ( const TConstArrayView< FVec3 > & points )

Helper that generates edge curvatures on the fly.

◆ GetEdgeToFaces()

const TArray< TVec2< int32 > > & Chaos::FTriangleMesh::GetEdgeToFaces ( ) const

Note that this data is lazily calculated with the SegmentMesh (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret A map from all edge indices, to the indices of their containing faces.

◆ GetElements() [1/2]

FORCEINLINE TArray< TVec3< int32 > > Chaos::FTriangleMesh::GetElements ( ) &&

inline

Move accessor for topology array.

Use via:

TArray<TVec3<int32>> Triangles;
FTriangleMesh TriMesh(Triangles); // steals Triangles to TriMesh::MElements
Triangles = MoveTemp(TriMesh).GetElements(); // steals TriMesh::MElements back to Triangles

◆ GetElements() [2/2]

FORCEINLINE const TArray< TVec3< int32 > > & Chaos::FTriangleMesh::GetElements ( ) const &

inline

◆ GetFaceNormals() [1/5]

FORCEINLINE TArray< FVec3 > Chaos::FTriangleMesh::GetFaceNormals	(	const FParticles &	InParticles,
		const bool	ReturnEmptyOnError = `true`
	)		const

inline

◆ GetFaceNormals() [2/5]

template<typename T >

TArray< TVec3< T > > Chaos::FTriangleMesh::GetFaceNormals	(	const TConstArrayView< TVec3< T > > &	Points,
		const bool	ReturnEmptyOnError
	)		const

◆ GetFaceNormals() [3/5]

template<typename T >

CHAOS_API TArray< TVec3< T > > Chaos::FTriangleMesh::GetFaceNormals	(	const TConstArrayView< TVec3< T > > &	Points,
		const bool	ReturnEmptyOnError = `true`
	)		const

The GetFaceNormals functions assume Counter Clockwise triangle windings in a Left Handed coordinate system If this is not the case the returned face normals may be inverted

◆ GetFaceNormals() [4/5]

template<typename T >

void Chaos::FTriangleMesh::GetFaceNormals	(	TArray< TVec3< T > > &	Normals,
		const TConstArrayView< TVec3< T > > &	Points,
		const bool	ReturnEmptyOnError
	)		const

◆ GetFaceNormals() [5/5]

template<typename T >

CHAOS_API void Chaos::FTriangleMesh::GetFaceNormals	(	TArray< TVec3< T > > &	Normals,
		const TConstArrayView< TVec3< T > > &	Points,
		const bool	ReturnEmptyOnError = `true`
	)		const

◆ GetFaceToEdges()

const TArray< TVec3< int32 > > & Chaos::FTriangleMesh::GetFaceToEdges ( ) const

Note that this data is lazily calculated with the SegmentMesh (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret A map from all face indices, to the indices of their associated edges.

◆ GetNeighbors()

FORCEINLINE const TSet< int32 > & Chaos::FTriangleMesh::GetNeighbors ( const int32 Element ) const

inline

◆ GetNRing()

FORCEINLINE TSet< int32 > Chaos::FTriangleMesh::GetNRing	(	const int32	Element,
		const int32	N
	)		const

inline

◆ GetNumElements()

FORCEINLINE int32 Chaos::FTriangleMesh::GetNumElements ( ) const

inline

◆ GetNumIndices()

int32 Chaos::FTriangleMesh::GetNumIndices ( ) const

inline

◆ GetPointNormals() [1/7]

FORCEINLINE TArray< FVec3 > Chaos::FTriangleMesh::GetPointNormals	(	const FParticles &	InParticles,
		const bool	ReturnEmptyOnError = `true`
	)

inline

◆ GetPointNormals() [2/7]

TArray< FVec3 > Chaos::FTriangleMesh::GetPointNormals	(	const TConstArrayView< FVec3 > &	points,
		const bool	ReturnEmptyOnError = `true`,
		const bool	bUseGlobalArray = `false`
	)

◆ GetPointNormals() [3/7]

void Chaos::FTriangleMesh::GetPointNormals	(	TArrayView< FVec3 >	PointNormals,
		const TConstArrayView< FVec3 > &	FaceNormals,
		const bool	bUseGlobalArray
	)

◆ GetPointNormals() [4/7]

template<>

CHAOS_API void Chaos::FTriangleMesh::GetPointNormals	(	TArrayView< TVec3< FRealSingle > >	PointNormals,
		const TConstArrayView< TVec3< FRealSingle > > &	FaceNormals,
		const bool	bUseGlobalArray
	)		const

◆ GetPointNormals() [5/7]

CHAOS_API void Chaos::FTriangleMesh::GetPointNormals	(	TArrayView< TVec3< FRealSingle > >	PointNormals,
		const TConstArrayView< TVec3< FRealSingle > > &	FaceNormals,
		const bool	bUseGlobalArray
	)		const

◆ GetPointNormals() [6/7]

template<typename T >

void Chaos::FTriangleMesh::GetPointNormals	(	TArrayView< TVec3< T > >	PointNormals,
		const TConstArrayView< TVec3< T > > &	FaceNormals,
		const bool	bUseGlobalArray
	)		const

◆ GetPointNormals() [7/7]

template<typename T >

CHAOS_API void Chaos::FTriangleMesh::GetPointNormals	(	TArrayView< TVec3< T > >	PointNormals,
		const TConstArrayView< TVec3< T > > &	FaceNormals,
		const bool	bUseGlobalArray
	)		const

Get per-point normals. This const version of this function requires GetPointToTriangleMap() to be called prior to invoking this function.

Parameters

bUseGlobalArray When true, fill the array from the StartIdx to StartIdx + NumIndices - 1 positions, otherwise fill the array from the 0 to NumIndices - 1 positions.

◆ GetPointToNeighborsMap()

const TMap< int32, TSet< int32 > > & Chaos::FTriangleMesh::GetPointToNeighborsMap ( ) const

◆ GetPointToTriangleMap()

TConstArrayView< TArray< int32 > > Chaos::FTriangleMesh::GetPointToTriangleMap ( ) const

◆ GetSegmentMesh()

const FSegmentMesh & Chaos::FTriangleMesh::GetSegmentMesh ( ) const

Note that the SegmentMesh is lazily calculated (this method is not threadsafe unless it is known that the SegmentMesh is already up to date) @ret The connectivity of this mesh represented as a collection of unique segments.

◆ GetStartIndex()

int32 Chaos::FTriangleMesh::GetStartIndex ( ) const

inline

◆ GetSurfaceElements() [1/2]

FORCEINLINE TArray< TVec3< int32 > > Chaos::FTriangleMesh::GetSurfaceElements ( ) &&

inline

Move accessor for topology array.

Use via:

TArray<TVec3<int32>> Triangles;
FTriangleMesh TriMesh(Triangles); // steals Triangles to TriMesh::MElements
Triangles = MoveTemp(TriMesh).GetSurfaceElements(); // steals TriMesh::MElements back to Triangles

◆ GetSurfaceElements() [2/2]

FORCEINLINE const TArray< TVec3< int32 > > & Chaos::FTriangleMesh::GetSurfaceElements ( ) const &

inline

◆ GetUniqueAdjacentElements()

TArray< TVec4< int32 > > Chaos::FTriangleMesh::GetUniqueAdjacentElements ( ) const

Return the array of bending element indices {i0, i1, i2, i3}, with {i0, i1} the segment indices and {i2, i3} the cross segment indices.

◆ GetUniqueAdjacentPoints()

TArray< TVec2< int32 > > Chaos::FTriangleMesh::GetUniqueAdjacentPoints ( ) const

Return the array of all cross segment indices for all pairs of adjacent triangles.

◆ GetVertexImportanceOrdering() [1/2]

TArray< int32 > Chaos::FTriangleMesh::GetVertexImportanceOrdering	(	const TConstArrayView< FVec3 > &	Points,
		const TArray< FReal > &	PointCurvatures,
		TArray< int32 > *	CoincidentVertices = `nullptr`,
		const bool	RestrictToLocalIndexRange = `false`
	)

@ret An array of vertex indices ordered from most important to least.

Parameters

Points	- point positions.
PointCurvatures	- a per-point measure of curvature.
CoincidentVertices	- indices of points that are coincident to another point.
RestrictToLocalIndexRange	- ignores points outside of the index range used by this mesh.

◆ GetVertexImportanceOrdering() [2/2]

TArray< int32 > Chaos::FTriangleMesh::GetVertexImportanceOrdering	(	const TConstArrayView< FVec3 > &	Points,
		TArray< int32 > *	CoincidentVertices = `nullptr`,
		const bool	RestrictToLocalIndexRange = `false`
	)

Helper that generates point curvatures on the fly.

◆ GetVertexRange()

TVec2< int32 > Chaos::FTriangleMesh::GetVertexRange ( ) const

Returns the closed interval of the smallest vertex index used by this class, to the largest.

If this mesh is empty, the second index of the range will be negative.

◆ GetVertexSet()

void Chaos::FTriangleMesh::GetVertexSet ( TSet< int32 > & VertexSet ) const

Returns the unique set of vertices used by this triangle mesh.

◆ GetVertexSetAsArray()

void Chaos::FTriangleMesh::GetVertexSetAsArray ( TArray< int32 > & VertexSet ) const

Returns the unique set of vertices used by this triangle mesh.

◆ GetVertices()

TSet< int32 > Chaos::FTriangleMesh::GetVertices ( ) const

Returns the set of vertices used by triangles.

◆ Init() [1/2]

void Chaos::FTriangleMesh::Init	(	const TConstArrayView< TVec3< int32 > > &	Elements,
		const int32	StartIdx = `0`,
		const int32	EndIdx = `-1`,
		const bool	CullDegenerateElements = `true`
	)

◆ Init() [2/2]

void Chaos::FTriangleMesh::Init	(	TArray< TVec3< int32 > > &&	Elements,
		const int32	StartIdx = `0`,
		const int32	EndIdx = `-1`,
		const bool	CullDegenerateElements = `true`
	)

Initialize the FTriangleMesh.

CullDegenerateElements removes faces with degenerate indices, and will change the order of MElements.

◆ InitEquilateralTriangleXY()

template<typename T >

static FORCEINLINE void Chaos::FTriangleMesh::InitEquilateralTriangleXY	(	FTriangleMesh &	TriMesh,
		TParticles< T, 3 > &	Particles
	)

inlinestatic

◆ InitEquilateralTriangleYZ()

template<typename T >

static FORCEINLINE void Chaos::FTriangleMesh::InitEquilateralTriangleYZ	(	FTriangleMesh &	TriMesh,
		TParticles< T, 3 > &	Particles
	)

inlinestatic

◆ PointClosestTriangleQuery() [1/2]

template<typename T >

bool Chaos::FTriangleMesh::PointClosestTriangleQuery	(	const TSpatialHashType< T > &	SpatialHash,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	PointIndex,
		const TVec3< T > &	PointPosition,
		const T	PointThickness,
		const T	ThisThickness,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ PointClosestTriangleQuery() [2/2]

template<typename T >

CHAOS_API bool Chaos::FTriangleMesh::PointClosestTriangleQuery	(	const TSpatialHashType< T > &	SpatialHash,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	PointIndex,
		const TVec3< T > &	PointPosition,
		const T	PointThickness,
		const T	ThisThickness,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ PointProximityQuery() [1/4]

template<typename T >

bool Chaos::FTriangleMesh::PointProximityQuery	(	const TBVHType< T > &	BVH,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	PointIndex,
		const TVec3< T > &	PointPosition,
		const T	PointThickness,
		const T	ThisThickness,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ PointProximityQuery() [2/4]

CHAOS_API bool Chaos::FTriangleMesh::PointProximityQuery	(	const TSpatialHashType< FRealSingle > &	SpatialHash,
		const TConstArrayView< TVec3< FRealSingle > > &	Points,
		const int32	PointIndex,
		const TVec3< FRealSingle > &	PointPosition,
		const FRealSingle	PointThickness,
		const Softs::FPBDFlatWeightMap &	ThisThicknesses,
		const FRealSingle	ThisThicknessExtraMultiplier,
		int32	ThicknessMapIndexOffset,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< FRealSingle > > &	Result
	)		const

◆ PointProximityQuery() [3/4]

template<typename T >

bool Chaos::FTriangleMesh::PointProximityQuery	(	const TSpatialHashType< T > &	SpatialHash,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	PointIndex,
		const TVec3< T > &	PointPosition,
		const T	PointThickness,
		const T	ThisThickness,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ PointProximityQuery() [4/4]

template<typename T >

CHAOS_API bool Chaos::FTriangleMesh::PointProximityQuery	(	const TSpatialHashType< T > &	SpatialHash,
		const TConstArrayView< TVec3< T > > &	Points,
		const int32	PointIndex,
		const TVec3< T > &	PointPosition,
		const T	PointThickness,
		const T	ThisThickness,
		TFunctionRef< bool(const int32 PointIndex, const int32 TriangleIndex)>	BroadphaseTest,
		TArray< TTriangleCollisionPoint< T > > &	Result
	)		const

◆ RemapVertices() [1/2]

void Chaos::FTriangleMesh::RemapVertices ( const TArray< int32 > & Order )

Reorder vertices according to.

Parameters

Order.

◆ RemapVertices() [2/2]

void Chaos::FTriangleMesh::RemapVertices ( const TMap< int32, int32 > & Remapping )

◆ RemoveDegenerateElements()

void Chaos::FTriangleMesh::RemoveDegenerateElements ( )

◆ RemoveDuplicateElements()

void Chaos::FTriangleMesh::RemoveDuplicateElements ( )

◆ ResetAuxiliaryStructures()

void Chaos::FTriangleMesh::ResetAuxiliaryStructures ( )

◆ Serialize()

void Chaos::FTriangleMesh::Serialize ( FArchive & Ar )

◆ SmoothProject()

template<typename T >

template CHAOS_API bool Chaos::FTriangleMesh::SmoothProject< FRealDouble >	(	const TBVHType< T > &	BVH,
		const TConstArrayView< FVec3 > &	Points,
		const TArray< FVec3 > &	PointNormals,
		const FVec3 &	Point,
		int32 &	TriangleIndex,
		FVec3 &	Weights,
		const int32	MaxIters = `10`
	)		const

Returns false if Point is outside of the smooth normal cone, where a smooth projection doesn't exist.

The documentation for this class was generated from the following files:

Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/TriangleMesh.h
Engine/Source/Runtime/Experimental/Chaos/Private/Chaos/TriangleMesh.cpp

Public Types

Public Member Functions

Static Public Member Functions

Member Typedef Documentation

◆ TBVHType

◆ TSpatialHashType

Constructor & Destructor Documentation

◆ FTriangleMesh() [1/4]

◆ FTriangleMesh() [2/4]

◆ FTriangleMesh() [3/4]

◆ FTriangleMesh() [4/4]

◆ ~FTriangleMesh()

Member Function Documentation

◆ BuildBVH()

◆ BuildSpatialHash() [1/3]

◆ BuildSpatialHash() [2/3]

◆ BuildSpatialHash() [3/3]

◆ EdgeIntersectionQuery() [1/2]

◆ EdgeIntersectionQuery() [2/2]

◆ ExpandVertexRange()

◆ FindCoincidentVertexRemappings()

◆ GetBoundaryPoints()

◆ GetCoincidentTriangles()

◆ GetConvexHullFromParticles() [1/2]

◆ GetConvexHullFromParticles() [2/2]

◆ GetCurvatureOnEdges() [1/2]

◆ GetCurvatureOnEdges() [2/2]

◆ GetCurvatureOnPoints() [1/2]

◆ GetCurvatureOnPoints() [2/2]

◆ GetEdgeToFaces()

◆ GetElements() [1/2]

◆ GetElements() [2/2]

◆ GetFaceNormals() [1/5]

◆ GetFaceNormals() [2/5]

◆ GetFaceNormals() [3/5]

◆ GetFaceNormals() [4/5]

◆ GetFaceNormals() [5/5]

◆ GetFaceToEdges()

◆ GetNeighbors()

◆ GetNRing()

◆ GetNumElements()

◆ GetNumIndices()

◆ GetPointNormals() [1/7]

◆ GetPointNormals() [2/7]

◆ GetPointNormals() [3/7]

◆ GetPointNormals() [4/7]

◆ GetPointNormals() [5/7]

◆ GetPointNormals() [6/7]

◆ GetPointNormals() [7/7]

◆ GetPointToNeighborsMap()

◆ GetPointToTriangleMap()

◆ GetSegmentMesh()

◆ GetStartIndex()

◆ GetSurfaceElements() [1/2]

◆ GetSurfaceElements() [2/2]

◆ GetUniqueAdjacentElements()

◆ GetUniqueAdjacentPoints()

◆ GetVertexImportanceOrdering() [1/2]

◆ GetVertexImportanceOrdering() [2/2]

◆ GetVertexRange()

◆ GetVertexSet()

◆ GetVertexSetAsArray()

◆ GetVertices()

◆ Init() [1/2]

◆ Init() [2/2]

◆ InitEquilateralTriangleXY()

◆ InitEquilateralTriangleYZ()

◆ PointClosestTriangleQuery() [1/2]

◆ PointClosestTriangleQuery() [2/2]

◆ PointProximityQuery() [1/4]

◆ PointProximityQuery() [2/4]

◆ PointProximityQuery() [3/4]

◆ PointProximityQuery() [4/4]

◆ RemapVertices() [1/2]

◆ RemapVertices() [2/2]

◆ RemoveDegenerateElements()

◆ RemoveDuplicateElements()

◆ ResetAuxiliaryStructures()

◆ Serialize()

◆ SmoothProject()