petsc-3.8.4 2018-03-24

DMPlexComputeProjection3Dto1D

Rewrite coordinates to be the 1D projection of the 3D coordinates

#include "petscdmplex.h"   
#include "petscfe.h"       
PetscErrorCode DMPlexComputeProjection3Dto1D(PetscScalar coords[], PetscReal R[])

Not collective

coords -The coordinates of a segment

	coords	- The new y-coordinate, and 0 for x and z
	R	- The rotation which accomplishes the projection

Note: This uses the basis completion described by Frisvad in http://www.imm.dtu.dk/~jerf/papers/abstracts/onb.html, DOI:10.1080/2165347X.2012.689606