petsc-3.13.6 2020-09-29

DMFieldEvaluate

Evaluate the field and its derivatives on a set of points

Synopsis

#include "petscdmfield.h" 
#include "petscdmfield.h" 
PetscErrorCode DMFieldEvaluate(DMField field, Vec points, PetscDataType datatype, void *B, void *D, void *H)

Collective on points

Input Parameter

	field	- The DMField object
	points	- The points at which to evaluate the field. Should have size d x n, where d is the coordinate dimension of the manifold and n is the number of points
	datatype	- The PetscDataType of the output arrays: either PETSC_REAL or PETSC_SCALAR. If the field is complex and datatype is PETSC_REAL, the real part of the field is returned.

Output Parameter

	B	- pointer to data of size c * n * sizeof(datatype), where c is the number of components in the field. If B is not NULL, the values of the field are written in this array, varying first by component, then by point.
	D	- pointer to data of size d * c * n * sizeof(datatype). If D is not NULL, the values of the field's spatial derivatives are written in this array, varying first by the partial derivative component, then by field component, then by point.
	H	- pointer to data of size d * d * c * n * sizeof(datatype). If H is not NULL, the values of the field's second spatial derivatives are written in this array, varying first by the second partial derivative component, then by field component, then by point.

Level

intermediate

DMFieldEvaluate

Synopsis

Input Parameter

Output Parameter

See Also

Level

Location

Examples

Implementations