PointFunctionInterpolateField

A PointFunction that gives the field value at a given point in the mesh based upon a grid vector representation.

#include "gvec.h" 
int PointFunctionInterpolateField(int n, int comp, double *x, double *y, double *z, PetscScalar *values, void *ctx)

n -The number of points

comp -The number of components

x,y,z -The coordinates of points

ctx -An InterpolationContext

values -The location where the field values are stored

point function, grid