axom::primal::KnotVector< T >::DerivativeBasisWorkspace Struct Reference

Scratch storage for derivativeBasisFunctionsBySpan(...) More...

#include </home/docs/checkouts/readthedocs.org/user_builds/axom/checkouts/develop/src/axom/primal/geometry/KnotVector.hpp>

Public Member Functions
void	ensure (int deg, int n)

Public Attributes
axom::Array< T >	ders
	Derivative table of size (n+1) x (p+1) (row-major, derivative-order major) More...
axom::Array< T >	ndu
	Basis-function triangle from Algorithm A2.2 of size (p+1) x (p+1) (row-major) More...
axom::Array< T >	a
	Alternating coefficient rows from Algorithm A2.3 of size 2 x (p+1) (row-major) More...
axom::Array< T >	left
	Left/right distance buffers from Algorithm A2.2 of length p+1 More...
axom::Array< T >	right

Detailed Description

template<typename T>
struct axom::primal::KnotVector< T >::DerivativeBasisWorkspace

Scratch storage for derivativeBasisFunctionsBySpan(...)

Stores intermediate tables from Algorithms A2.2/A2.3 ("The NURBS Book") in contiguous, row-major buffers to avoid per-call dynamic allocations.

Typical usage is to keep one instance per thread (e.g. thread_local) and reuse it across evaluations.

Member Function Documentation

ensure()

template<typename T >

void axom::primal::KnotVector< T >::DerivativeBasisWorkspace::ensure ( int  deg, int  n  )

inline

References axom::primal::KnotVector< T >::DerivativeBasisWorkspace::a, axom::primal::KnotVector< T >::DerivativeBasisWorkspace::ders, axom::primal::KnotVector< T >::DerivativeBasisWorkspace::left, axom::primal::KnotVector< T >::DerivativeBasisWorkspace::ndu, and axom::primal::KnotVector< T >::DerivativeBasisWorkspace::right.

Member Data Documentation

ders

template<typename T >

axom::Array<T> axom::primal::KnotVector< T >::DerivativeBasisWorkspace::ders

Derivative table of size (n+1) x (p+1) (row-major, derivative-order major)

ndu

template<typename T >

axom::Array<T> axom::primal::KnotVector< T >::DerivativeBasisWorkspace::ndu

Basis-function triangle from Algorithm A2.2 of size (p+1) x (p+1) (row-major)

a

template<typename T >

axom::Array<T> axom::primal::KnotVector< T >::DerivativeBasisWorkspace::a

Alternating coefficient rows from Algorithm A2.3 of size 2 x (p+1) (row-major)

left

template<typename T >

axom::Array<T> axom::primal::KnotVector< T >::DerivativeBasisWorkspace::left

Left/right distance buffers from Algorithm A2.2 of length p+1

right

template<typename T >

axom::Array<T> axom::primal::KnotVector< T >::DerivativeBasisWorkspace::right

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The documentation for this struct was generated from the following file:

• /home/docs/checkouts/readthedocs.org/user_builds/axom/checkouts/develop/src/axom/primal/geometry/KnotVector.hpp