basix::indexing Namespace Reference

Indexing. More...

Functions
constexpr int	idx (int p)
	Compute trivial indexing in a 1D array (for completeness).
constexpr int	idx (int p, int q)
constexpr int	idx (int p, int q, int r)
	Compute indexing in a 3D tetrahedral array compressed into a 1D array.

Detailed Description

Indexing.

Function Documentation

idx() [1/3]

int basix::indexing::idx ( int p )

constexpr

Compute trivial indexing in a 1D array (for completeness).

Parameters

p	Index in x

Returns

1D Index

idx() [2/3]

int basix::indexing::idx ( int p, int q )

constexpr

Compute indexing in a 2D triangular array compressed into a 1D array. This can be used to find the index of a derivative returned by FiniteElement::tabulate(). For instance to find d2N/dx2, use FiniteElement::tabulate(2, points)[idx(2, 0)];

Parameters

p	Index in x
q	Index in y

Returns

1D Index

idx() [3/3]

int basix::indexing::idx ( int p, int q, int r )

constexpr

Compute indexing in a 3D tetrahedral array compressed into a 1D array.

Parameters

p	Index in x.
q	Index in y.
r	Index in z.

Returns

1D Index.