DMPlexCreateFromDAG#
This takes as input the adjacency-list representation of the Directed Acyclic Graph (Hasse Diagram) encoding a mesh, and produces a DM
Synopsis#
#include "petscdmplex.h"
#include "petscdmplex.h"
PetscErrorCode DMPlexCreateFromDAG(DM dm, PetscInt depth, const PetscInt numPoints[], const PetscInt coneSize[], const PetscInt cones[], const PetscInt coneOrientations[], const PetscScalar vertexCoords[])
Input Parameters#
dm - The empty
DMobject, usually fromDMCreate()andDMSetDimension()depth - The depth of the DAG
numPoints - Array of size depth + 1 containing the number of points at each
depthconeSize - The cone size of each point
cones - The concatenation of the cone points for each point, the cone list must be oriented correctly for each point
coneOrientations - The orientation of each cone point
vertexCoords - An array of
numPoints[0]*spacedim numbers representing the coordinates of each vertex, with spacedim the value set viaDMSetCoordinateDim()
Output Parameter#
dm - The
DM
Note#
Two triangles sharing a face would have input
depth = 1, numPoints = [4 2], coneSize = [3 3 0 0 0 0]
cones = [2 3 4 3 5 4], coneOrientations = [0 0 0 0 0 0]
vertexCoords = [-1.0 0.0 0.0 -1.0 0.0 1.0 1.0 0.0]
which would result in the DMPlex
4
/ | \
/ | \
/ | \
2 0 | 1 5
\ | /
\ | /
\ | /
3
Notice that all points are numbered consecutively, unlike DMPlexCreateFromCellListPetsc()
See Also#
DMPlex: Unstructured Grids, DM, DMPLEX, DMPlexCreateFromCellListPetsc(), DMPlexCreate()
Level#
advanced
Location#
src/dm/impls/plex/plexcreate.c
Index of all DMPlex routines
Table of Contents for all manual pages
Index of all manual pages