petsc-master 2019-09-20
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DMPlexCreateBasisRotation

Create an internal transformation from the global basis, used to specify boundary conditions and global solutions, to a local basis, appropriate for discretization integrals and assembly.

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexCreateBasisRotation(DM dm, PetscReal alpha, PetscReal beta, PetscReal gamma)

Input Parameters

Note: Following https://en.wikipedia.org/wiki/Euler_angles, we will specify Euler angles by extrinsic rotations, meaning that

we rotate with respect to a fixed initial coordinate system, the local basis (x-y-z). The global basis (X-Y-Z) is reached as follows

$ The XYZ system rotates about the z axis by alpha. The X axis is now at angle alpha with respect to the x axis. $ The XYZ system rotates again about the x axis by beta. The Z axis is now at angle beta with respect to the z axis. $ The XYZ system rotates a third time about the z axis by gamma.

See Also

DMPlexGlobalToLocalBasis(), DMPlexLocalToGlobalBasis()

Level

developer

Location

src/dm/impls/plex/plexfem.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages
dm - The DM
alpha - The first Euler angle, and in 2D the only one
beta - The second Euler angle
gamma - The third Euler angle