basix::indexing Namespace Reference

Indexing. More...

Functions
constexpr int	idx (int p)
constexpr int	idx (int p, int q)
constexpr int	idx (int p, int q, int r)

Detailed Description

Indexing.

Function Documentation

idx() [1/3]

constexpr 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]

constexpr 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]

constexpr 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