petsc-3.7.7 2017-09-25

DMPlexPointGlobalRead

return read access to a point in global array

#include "petscdmplex.h"   
PetscErrorCode DMPlexPointGlobalRead(DM dm,PetscInt point,const PetscScalar *array,const void *ptr)

Not Collective

	dm	- DM defining topological space
	point	- topological point
	array	- array to index into

ptr -address of read reference to point data, type generic so user can place in structure; returns NULL if global point is not owned

 const struct { PetscScalar foo,bar,baz; } *ptr;

 DMPlexPointGlobalRead(dm,point,array,&ptr);

 x = 2*ptr->foo + 3*ptr->bar + 5*ptr->baz;