PetscSpaceEvaluate#

Evaluate the basis functions and their derivatives (jet) at each point

Synopsis#

#include "petscfe.h"  
PetscErrorCode PetscSpaceEvaluate(PetscSpace sp, PetscInt npoints, const PetscReal points[], PetscReal B[], PetscReal D[], PetscReal H[])

Input Parameters#

  • sp - The PetscSpace

  • npoints - The number of evaluation points, in reference coordinates

  • points - The point coordinates

Output Parameters#

  • B - The function evaluations in a npoints x nfuncs array

  • D - The derivative evaluations in a npoints x nfuncs x dim array

  • H - The second derivative evaluations in a npoints x nfuncs x dim x dim array

Note#

Above nfuncs is the dimension of the space, and dim is the spatial dimension. The coordinates are given on the reference cell, not in real space.

See Also#

PetscSpace, PetscFECreateTabulation(), PetscFEGetCellTabulation(), PetscSpaceCreate()

Level#

beginner

Location#

src/dm/dt/space/interface/space.c

Implementations#

PetscSpaceEvaluate_Point in src/dm/dt/space/impls/point/spacepoint.c
PetscSpaceEvaluate_Polynomial in src/dm/dt/space/impls/poly/spacepoly.c
PetscSpaceEvaluate_Ptrimmed in src/dm/dt/space/impls/ptrimmed/spaceptrimmed.c
PetscSpaceEvaluate_Subspace in src/dm/dt/space/impls/subspace/spacesubspace.c
PetscSpaceEvaluate_Sum in src/dm/dt/space/impls/sum/spacesum.c
PetscSpaceEvaluate_Tensor in src/dm/dt/space/impls/tensor/spacetensor.c
PetscSpaceEvaluate_WXY in src/dm/dt/space/impls/wxy/spacewxy.c

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