petsc-3.13.6 2020-09-29

PetscFEComputeTabulation

Tabulates the basis functions, and perhaps derivatives, at the points provided.

#include "petscfe.h" 
PetscErrorCode PetscFEComputeTabulation(PetscFE fem, PetscInt npoints, const PetscReal points[], PetscInt K, PetscTabulation T)

Not collective

	fem	- The PetscFE object
	npoints	- The number of tabulation points
	points	- The tabulation point coordinates
	K	- The number of derivatives calculated
	T	- An existing tabulation object with enough allocated space

T -The basis function values and derivatives at tabulation points

T->T[0] = B[(p*pdim + i)*Nc + c] is the value at point p for basis function i and component c

T->T[1] = D[((p*pdim + i)*Nc + c)*dim + d] is the derivative value at point p for basis function i, component c, in direction d

T->T[2] = H[(((p*pdim + i)*Nc + c)*dim + d)*dim + e] is the value at point p for basis function i, component c, in directions d and e

intermediate