1 #include <petsc/private/dmpleximpl.h> /*I "petscdmplex.h" I*/ 2 #include <petscdmplextransform.h> 3 4 /*@ 5 DMPlexExtrude - Extrude a volumetric mesh from the input surface mesh 6 7 Input Parameters: 8 + dm - The surface mesh 9 . layers - The number of extruded layers 10 . thickness - The total thickness of the extruded layers, or `PETSC_DETERMINE` 11 . tensor - Flag to create tensor produt cells 12 . symmetric - Flag to extrude symmetrically about the surface 13 . periodic - Flag to extrude periodically 14 . normal - Surface normal vector, or `NULL` 15 . thicknesses - Thickness of each layer, or `NULL` 16 - activeLabel - `DMLabel` to extrude from, or `NULL` to extrude entire mesh 17 18 Output Parameter: 19 . edm - The volumetric mesh 20 21 Options Database Keys: 22 + -dm_plex_transform_extrude_thickness <t> - The total thickness of extruded layers 23 . -dm_plex_transform_extrude_use_tensor <bool> - Use tensor cells when extruding 24 . -dm_plex_transform_extrude_symmetric <bool> - Extrude layers symmetrically about the surface 25 . -dm_plex_transform_extrude_periodic <bool> - Extrude layers periodically 26 . -dm_plex_transform_extrude_normal <n0,...,nd> - Specify the extrusion direction 27 - -dm_plex_transform_extrude_thicknesses <t0,...,tl> - Specify thickness of each layer 28 29 Level: intermediate 30 31 Notes: 32 Extrusion is implemented as a `DMPlexTransform`, so that new mesh points are produced from old mesh points. In the example below, 33 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, 34 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 35 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 36 would v1, v2, e1 and e2. 37 38 .vb 39 v2----- e6 -----v5 40 | | 41 e2 face2 e4 42 | | 43 v1----- e5 -----v4 44 | | 45 e1 face1 e3 46 | | 47 v0--- original ----v3 48 .ve 49 50 .seealso: [](ch_unstructured), `DM`, `DMPLEX`, `DMExtrude()`, `DMPlexTransform`, `DMPlexTransformExtrudeSetThickness()`, `DMPlexTransformExtrudeSetTensor()` 51 @*/ 52 PetscErrorCode DMPlexExtrude(DM dm, PetscInt layers, PetscReal thickness, PetscBool tensor, PetscBool symmetric, PetscBool periodic, const PetscReal normal[], const PetscReal thicknesses[], DMLabel activeLabel, DM *edm) 53 { 54 DMPlexTransform tr; 55 DM cdm; 56 PetscObject disc; 57 PetscClassId id; 58 const char *prefix; 59 PetscOptions options; 60 PetscBool cutMarker = PETSC_FALSE; 61 62 PetscFunctionBegin; 63 PetscCall(DMPlexTransformCreate(PetscObjectComm((PetscObject)dm), &tr)); 64 PetscCall(PetscObjectSetName((PetscObject)tr, "Extrusion Transform")); 65 PetscCall(DMPlexTransformSetDM(tr, dm)); 66 PetscCall(DMPlexTransformSetType(tr, DMPLEXEXTRUDETYPE)); 67 PetscCall(PetscObjectGetOptionsPrefix((PetscObject)dm, &prefix)); 68 PetscCall(PetscObjectSetOptionsPrefix((PetscObject)tr, prefix)); 69 PetscCall(PetscObjectGetOptions((PetscObject)dm, &options)); 70 PetscCall(PetscObjectSetOptions((PetscObject)tr, options)); 71 if (activeLabel) PetscCall(DMPlexTransformSetActive(tr, activeLabel)); 72 PetscCall(DMPlexTransformExtrudeSetLayers(tr, layers)); 73 if (thickness > 0.) PetscCall(DMPlexTransformExtrudeSetThickness(tr, thickness)); 74 PetscCall(DMPlexTransformExtrudeSetTensor(tr, tensor)); 75 PetscCall(DMPlexTransformExtrudeSetSymmetric(tr, symmetric)); 76 PetscCall(DMPlexTransformExtrudeSetPeriodic(tr, periodic)); 77 if (normal) PetscCall(DMPlexTransformExtrudeSetNormal(tr, normal)); 78 if (thicknesses) PetscCall(DMPlexTransformExtrudeSetThicknesses(tr, layers, thicknesses)); 79 PetscCall(DMPlexTransformSetFromOptions(tr)); 80 PetscCall(PetscObjectSetOptions((PetscObject)tr, NULL)); 81 PetscCall(DMPlexTransformSetUp(tr)); 82 PetscCall(PetscObjectViewFromOptions((PetscObject)tr, NULL, "-dm_plex_transform_view")); 83 PetscCall(DMPlexTransformApply(tr, dm, edm)); 84 PetscCall(DMCopyDisc(dm, *edm)); 85 // Handle periodic viewing 86 PetscCall(PetscOptionsGetBool(options, ((PetscObject)dm)->prefix, "-dm_plex_periodic_cut", &cutMarker, NULL)); 87 PetscCall(DMPlexTransformExtrudeGetPeriodic(tr, &periodic)); 88 if (periodic && cutMarker) { 89 DMLabel cutLabel; 90 PetscInt dim, pStart, pEnd; 91 92 PetscCall(DMGetDimension(dm, &dim)); 93 PetscCall(DMCreateLabel(*edm, "periodic_cut")); 94 PetscCall(DMGetLabel(*edm, "periodic_cut", &cutLabel)); 95 PetscCall(DMPlexGetChart(dm, &pStart, &pEnd)); 96 for (PetscInt p = pStart; p < pEnd; ++p) { 97 DMPolytopeType ct; 98 DMPolytopeType *rct; 99 PetscInt *rsize, *rcone, *rornt; 100 PetscInt Nct; 101 102 PetscCall(DMPlexGetCellType(dm, p, &ct)); 103 PetscCall(DMPlexTransformCellTransform(tr, ct, p, NULL, &Nct, &rct, &rsize, &rcone, &rornt)); 104 for (PetscInt n = 0; n < Nct; ++n) { 105 PetscInt pNew, pdim = DMPolytopeTypeGetDim(rct[n]); 106 107 if (ct == rct[n] || pdim > dim) { 108 PetscCall(DMPlexTransformGetTargetPoint(tr, ct, rct[n], p, 0, &pNew)); 109 PetscCall(DMLabelSetValue(cutLabel, pNew, !pdim ? 1 : 2)); 110 } 111 } 112 } 113 } 114 // It is too hard to raise the dimension of a discretization, so just remake it 115 PetscCall(DMGetCoordinateDM(dm, &cdm)); 116 PetscCall(DMGetField(cdm, 0, NULL, &disc)); 117 PetscCall(PetscObjectGetClassId(disc, &id)); 118 if (id == PETSCFE_CLASSID) { 119 PetscSpace sp; 120 PetscInt deg; 121 122 PetscCall(PetscFEGetBasisSpace((PetscFE)disc, &sp)); 123 PetscCall(PetscSpaceGetDegree(sp, °, NULL)); 124 PetscCall(DMPlexCreateCoordinateSpace(*edm, deg, PETSC_FALSE, PETSC_TRUE)); 125 } 126 PetscCall(DMPlexTransformCreateDiscLabels(tr, *edm)); 127 PetscCall(DMPlexTransformDestroy(&tr)); 128 PetscCall(DMPlexCopy_Internal(dm, PETSC_FALSE, PETSC_FALSE, *edm)); 129 PetscFunctionReturn(PETSC_SUCCESS); 130 } 131 132 PetscErrorCode DMExtrude_Plex(DM dm, PetscInt layers, DM *edm) 133 { 134 PetscFunctionBegin; 135 PetscCall(DMPlexExtrude(dm, layers, PETSC_DETERMINE, PETSC_TRUE, PETSC_FALSE, PETSC_FALSE, NULL, NULL, NULL, edm)); 136 PetscCall(DMSetMatType(*edm, dm->mattype)); 137 PetscCall(DMViewFromOptions(*edm, NULL, "-check_extrude")); 138 PetscFunctionReturn(PETSC_SUCCESS); 139 } 140