ClothingMeshUtils Namespace Reference

Classes
class	ClothMeshDesc
struct	FMeshToMeshFilterSet
class	FVertexParameterMapper

Functions
void	SkinPhysicsMesh (const TArray< int32 > &InBoneMap, const FClothPhysicalMeshData &InMesh, const FTransform &PostTransform, const FMatrix44f *InBoneMatrices, const int32 InNumBoneMatrices, TArray< FVector3f > &OutPositions, TArray< FVector3f > &OutNormals)
void	GenerateMeshToMeshVertData (TArray< FMeshToMeshVertData > &OutMeshToMeshVertData, const ClothMeshDesc &TargetMesh, const ClothMeshDesc &SourceMesh, const FPointWeightMap *MaxDistances, bool bUseSmoothTransitions, bool bUseMultipleInfluences, float KernelMaxDistance, const TArray< FMeshToMeshFilterSet > &FilterSets)
FVector4f	GetPointBaryAndDist (const FVector3f &A, const FVector3f &B, const FVector3f &C, const FVector3f &Point)
double	TripleProduct (const FVector3f &A, const FVector3f &B, const FVector3f &C)
int32	QuadraticRoots (double A, double B, double Result[])
int32	CubicRoots (double A, double B, double C, double Result[])
FVector4f	GetPointBaryAndDistWithNormals (const FVector3f &A, const FVector3f &B, const FVector3f &C, const FVector3f &InputNA, const FVector3f &InputNB, const FVector3f &InputNC, const FVector3f &Point)
void	ComputeVertexContributions (TArray< FMeshToMeshVertData > &InOutSkinningData, const FPointWeightMap *const InMaxDistances, const bool bInSmoothTransition, const bool bInUseMultipleInfluences)

Variables
constexpr int	MaxNumRootsAndExtrema = 5

Function Documentation

ComputeVertexContributions()

void CLOTHINGSYSTEMRUNTIMECOMMON_API ClothingMeshUtils::ComputeVertexContributions	(	TArray< FMeshToMeshVertData > &	InOutSkinningData,
		const FPointWeightMap *const	InMaxDistances,
		const bool	bInSmoothTransition,
		const bool	bInUseMultipleInfluences = false
	)

Computes how much each vertex contributes to the final mesh. The final mesh is a blend between the cloth and the skinned mesh.

CubicRoots()

int32 ClothingMeshUtils::CubicRoots	(	double	A,
		double	B,
		double	C,
		double	Result[]
	)

GenerateMeshToMeshVertData()

void CLOTHINGSYSTEMRUNTIMECOMMON_API ClothingMeshUtils::GenerateMeshToMeshVertData	(	TArray< FMeshToMeshVertData > &	OutMeshToMeshVertData,
		const ClothMeshDesc &	TargetMesh,
		const ClothMeshDesc &	SourceMesh,
		const FPointWeightMap *	MaxDistances,
		bool	bUseSmoothTransitions,
		bool	bUseMultipleInfluences,
		float	KernelMaxDistance,
		const TArray< FMeshToMeshFilterSet > &	FilterSets = TArray< FMeshToMeshFilterSet >()
	)

Given mesh information for two meshes, generate a list of skinning data to embed TargetMesh in SourceMesh

Parameters

OutMeshToMeshVertData	- Final skinning data
TargetMesh	- Mesh data for the mesh we are embedding
SourceMesh	- Mesh data for the mesh we are embedding into
MaxDistances	- Fixed positions mask used to update the vertex contributions, or null if the update is not required
bUseSmoothTransitions	- Set blend weight to smoothen transitions between the fixed and deformed vertices when updating the vertex contributions
bUseMultipleInfluences	- Whether to take a weighted average of influences from multiple source triangles
KernelMaxDistance	- Max distance parameter for weighting kernel for when using multiple influences
FilterSets	- A set of source triangle indices to filter the search from, will use all source triangles if empty

GetPointBaryAndDist()

FVector4f ClothingMeshUtils::GetPointBaryAndDist	(	const FVector3f &	A,
		const FVector3f &	B,
		const FVector3f &	C,
		const FVector3f &	Point
	)

Given a triangle ABC with normals at each vertex NA, NB and NC, get a barycentric coordinate and corresponding distance from the triangle encoded in an FVector4 where the components are (BaryX, BaryY, BaryZ, Dist)

Parameters

A	- Position of triangle vertex A
B	- Position of triangle vertex B
C	- Position of triangle vertex C
NA	- Normal at vertex A
NB	- Normal at vertex B
NC	- Normal at vertex C
Point	- Point to calculate Bary+Dist for

GetPointBaryAndDistWithNormals()

FVector4f ClothingMeshUtils::GetPointBaryAndDistWithNormals	(	const FVector3f &	A,
		const FVector3f &	B,
		const FVector3f &	C,
		const FVector3f &	NA,
		const FVector3f &	NB,
		const FVector3f &	NC,
		const FVector3f &	Point
	)

Given a triangle ABC with normals at each vertex NA, NB and NC, get a barycentric coordinate and corresponding distance from the triangle encoded in an FVector4 where the components are (BaryX, BaryY, BaryZ, Dist)

Parameters

A	- Position of triangle vertex A
B	- Position of triangle vertex B
C	- Position of triangle vertex C
NA	- Normal at vertex A
NB	- Normal at vertex B
NC	- Normal at vertex C
Point	- Point to calculate Bary+Dist for

QuadraticRoots()

int32 ClothingMeshUtils::QuadraticRoots	(	double	A,
		double	B,
		double	Result[]
	)

SkinPhysicsMesh()

void CLOTHINGSYSTEMRUNTIMECOMMON_API ClothingMeshUtils::SkinPhysicsMesh	(	const TArray< int32 > &	BoneMap,
		const FClothPhysicalMeshData &	InMesh,
		const FTransform &	PostTransform,
		const FMatrix44f *	InBoneMatrices,
		const int32	InNumBoneMatrices,
		TArray< FVector3f > &	OutPositions,
		TArray< FVector3f > &	OutNormals
	)

Static method for calculating a skinned mesh result from source data

TripleProduct()

double ClothingMeshUtils::TripleProduct	(	const FVector3f &	A,
		const FVector3f &	B,
		const FVector3f &	C
	)

Variable Documentation

MaxNumRootsAndExtrema

constexpr int ClothingMeshUtils::MaxNumRootsAndExtrema = 5

constexpr