PETSc version 3.17.4
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DMPlexExtrude

Extrude a volumetric mesh from the input surface mesh

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexExtrude(DM dm, PetscInt layers, PetscReal thickness, PetscBool tensor, PetscBool symmetric, const PetscReal normal[], const PetscReal thicknesses[], DM *edm)

Input Parameters

dm - The surface mesh
layers - The number of extruded layers
thickness - The total thickness of the extruded layers, or PETSC_DETERMINE
tensor - Flag to create tensor produt cells
symmetric - Flag to extrude symmetrically about the surface
normal - Surface normal vector, or NULL
thicknesses - Thickness of each layer, or NULL

Output Parameter

edm - The volumetric mesh

Notes

Extrusion is implemented as a DMPlexTransform, so that new mesh points are produced from old mesh points. In the exmaple below, we begin with an edge (v0, v3). It is extruded for two layers. The original vertex v0 produces two edges, e1 and e2, and three vertices, v0, v2, and v2. Similarly, vertex v3 produces e3, e4, v3, v4, and v5. The original edge produces itself, e5 and e6, as well as face1 and face2. The new mesh points are given the same labels as the original points which produced them. Thus, if v0 had a label value 1, then so would v1, v2, e1 and e2.

 v2----- e6    -----v5
 |                  |
 e2     face2       e4
 |                  |
 v1----- e5    -----v4
 |                  |
 e1     face1       e3
 |                  |
 v0--- original ----v3

Options Database

-dm_plex_transform_extrude_thickness <t> - The total thickness of extruded layers
-dm_plex_transform_extrude_use_tensor <bool> - Use tensor cells when extruding
-dm_plex_transform_extrude_symmetric <bool> - Extrude layers symmetrically about the surface
-dm_plex_transform_extrude_normal <n0,...,nd> - Specify the extrusion direction
-dm_plex_transform_extrude_thicknesses <t0,...,tl> - Specify thickness of each layer

See Also

DMExtrude(), DMPlexTransform, DMPlexTransformExtrudeSetThickness(), DMPlexTransformExtrudeSetTensor()

Level

intermediate

Location

src/dm/impls/plex/plexextrude.c
Index of all DMPLEX routines
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Index of all manual pages