openvdb::v13_0::points::pca_internal Namespace Reference

Classes
struct	AttrIndices
struct	CovarianceTransfer
struct	NoTimer
struct	PcaTimer
struct	PcaTransfer
struct	WeightPosSumsTransfer

Typedefs
using	TimerT = NoTimer
using	WeightSumT = double
using	WeightedPositionSumT = Vec3d
using	GroupIndexT = points::AttributeSet::Descriptor::GroupIndex

Functions
template<typename T , typename LeafNodeT >
T *	initPcaArrayAttribute (LeafNodeT &leaf, const size_t idx, const bool fill=true)
template<typename Scalar >
Vec3i	descendingOrder (math::Vec3< Scalar > &vector)
	Sort a vector into descending order and output a vector of the resulting order. More...
template<typename Scalar >
bool	decomposeSymmetricMatrix (const math::Mat3< Scalar > &mat, math::Mat3< Scalar > &U, math::Vec3< Scalar > &sigma)
	Decomposes a symmetric matrix into its eigenvalues and a rotation matrix of eigenvectors. Note that if mat is positive-definite, this will be equivalent to a singular value decomposition where V = U. More...

Typedef Documentation

using GroupIndexT = points::AttributeSet::Descriptor::GroupIndex

using TimerT = NoTimer

using WeightedPositionSumT = Vec3d

using WeightSumT = double

Function Documentation

bool openvdb::v13_0::points::pca_internal::decomposeSymmetricMatrix ( const math::Mat3< Scalar > &  mat, math::Mat3< Scalar > &  U, math::Vec3< Scalar > &  sigma  )

inline

Decomposes a symmetric matrix into its eigenvalues and a rotation matrix of eigenvectors. Note that if mat is positive-definite, this will be equivalent to a singular value decomposition where V = U.

Parameters

mat	Matrix to decompose
U	rotation matrix. The order of its columns (which will be eigenvectors) will match the eigenvalues in sigma
sigma	vector of eigenvalues

Vec3i openvdb::v13_0::points::pca_internal::descendingOrder ( math::Vec3< Scalar > &  vector )

inline

Sort a vector into descending order and output a vector of the resulting order.

Parameters

vector

Vector to sort

T* openvdb::v13_0::points::pca_internal::initPcaArrayAttribute ( LeafNodeT &  leaf, const size_t  idx, const bool  fill = true  )

inline