LSQVertexGradientFunctor Struct Reference

Gradient over all vertex neighbors plus the boundary ghost states of the cell's own boundary faces, as a fixed linear combination of the differences to the cell's state. More...

#include <gradient.h>

Public Member Functions
template<typename F >
KOKKOS_INLINE_FUNCTION void	for_each_point (const uint32_t i_cell, F &&f) const
	Offset of every stencil point of cell i_cell, passed to f(offset, is_face, index into cells_of_cell or faces_of_cell).
KOKKOS_INLINE_FUNCTION void	compute_weights (const uint32_t i_cell) const
	Compute the weights of cell i_cell, in double: the normal equations of the quadratic fit are too ill conditioned for single precision.
KOKKOS_INLINE_FUNCTION void	operator() (const uint32_t i_cell) const

Public Attributes
LSQGradientFunctor	faces
Kokkos::View< uint32_t * >	offsets_cells_of_cell
Kokkos::View< uint32_t * >	cells_of_cell
Kokkos::View< uint8_t * >	cells_of_cell_shift
VertexGradientWeights	weights
bool	quadratic = true
Kokkos::View< rtype *[3]>	covariance

Static Public Attributes
static constexpr uint8_t	NB = N_DIM + N_DIM * (N_DIM + 1) / 2

Detailed Description

Gradient over all vertex neighbors plus the boundary ghost states of the cell's own boundary faces, as a fixed linear combination of the differences to the cell's state.

The weights come from an inverse-distance-squared weighted least-squares fit of a quadratic, so the gradient is second-order accurate on any stencil that determines the fit: on triangles and on the one-sided stencils of boundary cells, where a linear fit is only first-order accurate. Stencils with too few or degenerate points, or quadratic = false, use the linear fit.

Member Function Documentation

compute_weights()

KOKKOS_INLINE_FUNCTION void LSQVertexGradientFunctor::compute_weights ( const uint32_t  i_cell ) const

inline

Compute the weights of cell i_cell, in double: the normal equations of the quadratic fit are too ill conditioned for single precision.

for_each_point()

template<typename F >

KOKKOS_INLINE_FUNCTION void LSQVertexGradientFunctor::for_each_point ( const uint32_t  i_cell, F &&  f  ) const

inline

Offset of every stencil point of cell i_cell, passed to f(offset, is_face, index into cells_of_cell or faces_of_cell).

operator()()

KOKKOS_INLINE_FUNCTION void LSQVertexGradientFunctor::operator() ( const uint32_t  i_cell ) const

inline

Member Data Documentation

cells_of_cell

Kokkos::View<uint32_t *> LSQVertexGradientFunctor::cells_of_cell

cells_of_cell_shift

Kokkos::View<uint8_t *> LSQVertexGradientFunctor::cells_of_cell_shift

covariance

Kokkos::View<rtype *[3]> LSQVertexGradientFunctor::covariance

faces

LSQGradientFunctor LSQVertexGradientFunctor::faces

NB

constexpr uint8_t LSQVertexGradientFunctor::NB = N_DIM + N_DIM * (N_DIM + 1) / 2

staticconstexpr

offsets_cells_of_cell

Kokkos::View<uint32_t *> LSQVertexGradientFunctor::offsets_cells_of_cell

quadratic

bool LSQVertexGradientFunctor::quadratic = true

weights

VertexGradientWeights LSQVertexGradientFunctor::weights

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

• /home/runner/work/mallard/mallard/mallard/src/numerics/gradient.h