Actual source code: plexceed.c
1: #include <petsc/private/dmpleximpl.h>
3: static PetscErrorCode DMGetPoints_Private(DM dm, DMLabel domainLabel, PetscInt labelVal, PetscInt height, IS *pointIS)
4: {
5: PetscInt depth;
6: DMLabel depthLabel;
7: IS depthIS;
9: PetscFunctionBegin;
10: PetscCall(DMPlexGetDepth(dm, &depth));
11: PetscCall(DMPlexGetDepthLabel(dm, &depthLabel));
12: PetscCall(DMLabelGetStratumIS(depthLabel, depth - height, &depthIS));
13: if (domainLabel) {
14: IS domainIS;
16: PetscCall(DMLabelGetStratumIS(domainLabel, labelVal, &domainIS));
17: if (domainIS) { // domainIS is non-empty
18: PetscCall(ISIntersect(depthIS, domainIS, pointIS));
19: PetscCall(ISDestroy(&domainIS));
20: } else { // domainIS is NULL (empty)
21: *pointIS = NULL;
22: }
23: PetscCall(ISDestroy(&depthIS));
24: } else {
25: *pointIS = depthIS;
26: }
27: PetscFunctionReturn(PETSC_SUCCESS);
28: }
30: /*@C
31: DMPlexGetLocalOffsets - Allocate and populate array of local offsets for each cell closure.
33: Not collective
35: Input Parameters:
36: + dm - The `DMPLEX` object
37: . domain_label - label for `DMPLEX` domain, or NULL for whole domain
38: . label_value - Stratum value
39: . height - Height of target cells in `DMPLEX` topology
40: - dm_field - Index of `DMPLEX` field
42: Output Parameters:
43: + num_cells - Number of local cells
44: . cell_size - Size of each cell, given by cell_size * num_comp = num_dof
45: . num_comp - Number of components per dof
46: . l_size - Size of local vector
47: - offsets - Allocated offsets array for cells
49: Level: developer
51: Notes:
52: Allocate and populate array of shape [num_cells, cell_size] defining offsets for each value (cell, node) for local vector of the `DMPLEX` field. All offsets are in the range [0, l_size - 1].
54: Caller is responsible for freeing the offsets array using `PetscFree()`.
56: .seealso: [](ch_unstructured), `DMPlexGetLocalOffsetsSupport()`, `DM`, `DMPLEX`, `DMLabel`, `DMPlexGetClosureIndices()`, `DMPlexSetClosurePermutationTensor()`, `DMPlexGetCeedRestriction()`
57: @*/
58: PetscErrorCode DMPlexGetLocalOffsets(DM dm, DMLabel domain_label, PetscInt label_value, PetscInt height, PetscInt dm_field, PetscInt *num_cells, PetscInt *cell_size, PetscInt *num_comp, PetscInt *l_size, PetscInt **offsets)
59: {
60: PetscDS ds = NULL;
61: PetscFE fe;
62: PetscSection section;
63: PetscInt dim, ds_field = -1;
64: PetscInt *restr_indices;
65: const PetscInt *iter_indices;
66: IS iter_is;
68: PetscFunctionBeginUser;
70: PetscCall(DMGetLocalSection(dm, §ion));
71: PetscCall(DMGetDimension(dm, &dim));
72: {
73: IS field_is;
74: const PetscInt *fields;
75: PetscInt num_fields;
77: PetscCall(DMGetRegionDS(dm, domain_label, &field_is, &ds, NULL));
78: // Translate dm_field to ds_field
79: PetscCall(ISGetIndices(field_is, &fields));
80: PetscCall(ISGetSize(field_is, &num_fields));
81: for (PetscInt i = 0; i < num_fields; i++) {
82: if (dm_field == fields[i]) {
83: ds_field = i;
84: break;
85: }
86: }
87: PetscCall(ISRestoreIndices(field_is, &fields));
88: }
89: PetscCheck(ds_field != -1, PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "Could not find dm_field %" PetscInt_FMT " in DS", dm_field);
91: PetscCall(DMGetPoints_Private(dm, domain_label, label_value, height, &iter_is));
92: if (iter_is) {
93: PetscCall(ISGetLocalSize(iter_is, num_cells));
94: PetscCall(ISGetIndices(iter_is, &iter_indices));
95: } else {
96: *num_cells = 0;
97: iter_indices = NULL;
98: }
100: {
101: PetscDualSpace dual_space;
102: PetscInt num_dual_basis_vectors;
104: PetscCall(PetscDSGetDiscretization(ds, ds_field, (PetscObject *)&fe));
105: PetscCall(PetscFEGetHeightSubspace(fe, height, &fe));
106: PetscCheck(fe, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Height %" PetscInt_FMT " is invalid for DG coordinates", height);
107: PetscCall(PetscFEGetDualSpace(fe, &dual_space));
108: PetscCall(PetscDualSpaceGetDimension(dual_space, &num_dual_basis_vectors));
109: PetscCall(PetscDualSpaceGetNumComponents(dual_space, num_comp));
110: PetscCheck(num_dual_basis_vectors % *num_comp == 0, PETSC_COMM_SELF, PETSC_ERR_SUP, "No support for number of dual basis vectors %" PetscInt_FMT " not divisible by %" PetscInt_FMT " components", num_dual_basis_vectors, *num_comp);
111: *cell_size = num_dual_basis_vectors / *num_comp;
112: }
113: PetscInt restr_size = (*num_cells) * (*cell_size);
114: PetscCall(PetscMalloc1(restr_size, &restr_indices));
115: PetscInt cell_offset = 0;
117: PetscInt P = (PetscInt)PetscPowReal(*cell_size, 1.0 / (dim - height));
118: for (PetscInt p = 0; p < *num_cells; p++) {
119: PetscBool flip = PETSC_FALSE;
120: PetscInt c = iter_indices[p];
121: PetscInt num_indices, *indices;
122: PetscInt field_offsets[17]; // max number of fields plus 1
123: PetscCall(DMPlexGetClosureIndices(dm, section, section, c, PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
124: if (height > 0) {
125: PetscInt num_cells_support, num_faces, start = -1;
126: const PetscInt *orients, *faces, *cells;
127: PetscCall(DMPlexGetSupport(dm, c, &cells));
128: PetscCall(DMPlexGetSupportSize(dm, c, &num_cells_support));
129: PetscCheck(num_cells_support == 1, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "Expected one cell in support of exterior face, but got %" PetscInt_FMT " cells", num_cells_support);
130: PetscCall(DMPlexGetCone(dm, cells[0], &faces));
131: PetscCall(DMPlexGetConeSize(dm, cells[0], &num_faces));
132: for (PetscInt i = 0; i < num_faces; i++) {
133: if (faces[i] == c) start = i;
134: }
135: PetscCheck(start >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_CORRUPT, "Could not find face %" PetscInt_FMT " in cone of its support", c);
136: PetscCall(DMPlexGetConeOrientation(dm, cells[0], &orients));
137: if (orients[start] < 0) flip = PETSC_TRUE;
138: }
140: for (PetscInt i = 0; i < *cell_size; i++) {
141: PetscInt ii = i;
142: if (flip) {
143: if (*cell_size == P) ii = *cell_size - 1 - i;
144: else if (*cell_size == P * P) {
145: PetscInt row = i / P, col = i % P;
146: ii = row + col * P;
147: } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP, "No support for flipping point with cell size %" PetscInt_FMT " != P (%" PetscInt_FMT ") or P^2", *cell_size, P);
148: }
149: // Essential boundary conditions are encoded as -(loc+1), but we don't care so we decode.
150: PetscInt loc = indices[field_offsets[dm_field] + ii * (*num_comp)];
151: restr_indices[cell_offset++] = loc >= 0 ? loc : -(loc + 1);
152: }
153: PetscCall(DMPlexRestoreClosureIndices(dm, section, section, c, PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
154: }
155: PetscCheck(cell_offset == restr_size, PETSC_COMM_SELF, PETSC_ERR_SUP, "Shape mismatch, offsets array of shape (%" PetscInt_FMT ", %" PetscInt_FMT ") initialized for %" PetscInt_FMT " nodes", *num_cells, (*cell_size), cell_offset);
156: if (iter_is) PetscCall(ISRestoreIndices(iter_is, &iter_indices));
157: PetscCall(ISDestroy(&iter_is));
159: *offsets = restr_indices;
160: PetscCall(PetscSectionGetStorageSize(section, l_size));
161: PetscFunctionReturn(PETSC_SUCCESS);
162: }
164: /*@C
165: DMPlexGetLocalOffsetsSupport - Allocate and populate arrays of local offsets for each face support.
167: Not collective
169: Input Parameters:
170: + dm - The `DMPLEX` object
171: . domain_label - label for `DMPLEX` domain, or NULL for whole domain
172: - label_value - Stratum value
174: Output Parameters:
175: + num_faces - Number of local, non-boundary faces
176: . num_comp - Number of components per dof
177: . l_size - Size of local vector
178: . offsetsNeg - Allocated offsets array for cells on the inward normal side of each face
179: - offsetsPos - Allocated offsets array for cells on the outward normal side of each face
181: Level: developer
183: Notes:
184: Allocate and populate array of shape [num_cells, num_comp] defining offsets for each cell for local vector of the `DMPLEX` field. All offsets are in the range [0, l_size - 1].
186: Caller is responsible for freeing the offsets array using `PetscFree()`.
188: .seealso: [](ch_unstructured), `DMPlexGetLocalOffsets()`, `DM`, `DMPLEX`, `DMLabel`, `DMPlexGetClosureIndices()`, `DMPlexSetClosurePermutationTensor()`, `DMPlexGetCeedRestriction()`
189: @*/
190: PetscErrorCode DMPlexGetLocalOffsetsSupport(DM dm, DMLabel domain_label, PetscInt label_value, PetscInt *num_faces, PetscInt *num_comp, PetscInt *l_size, PetscInt **offsetsNeg, PetscInt **offsetsPos)
191: {
192: PetscDS ds = NULL;
193: PetscFV fv;
194: PetscSection section;
195: PetscInt dim, height = 1, dm_field = 0, ds_field = 0, Nf, NfInt = 0, cell_size, restr_size;
196: PetscInt *restr_indices_neg, *restr_indices_pos;
197: const PetscInt *iter_indices;
198: IS iter_is;
200: PetscFunctionBeginUser;
202: PetscCall(DMGetLocalSection(dm, §ion));
203: PetscCall(DMGetDimension(dm, &dim));
204: PetscCall(DMGetRegionDS(dm, domain_label, NULL, &ds, NULL));
206: PetscCall(DMGetPoints_Private(dm, domain_label, label_value, height, &iter_is));
207: if (iter_is) {
208: PetscCall(ISGetIndices(iter_is, &iter_indices));
209: PetscCall(ISGetLocalSize(iter_is, &Nf));
210: for (PetscInt p = 0, Ns; p < Nf; ++p) {
211: PetscCall(DMPlexGetSupportSize(dm, iter_indices[p], &Ns));
212: if (Ns == 2) ++NfInt;
213: }
214: *num_faces = NfInt;
215: } else {
216: *num_faces = 0;
217: iter_indices = NULL;
218: }
220: PetscCall(PetscDSGetDiscretization(ds, ds_field, (PetscObject *)&fv));
221: PetscCall(PetscFVGetNumComponents(fv, num_comp));
222: cell_size = *num_comp;
223: restr_size = (*num_faces) * cell_size;
224: PetscCall(PetscMalloc1(restr_size, &restr_indices_neg));
225: PetscCall(PetscMalloc1(restr_size, &restr_indices_pos));
226: PetscInt face_offset_neg = 0, face_offset_pos = 0;
228: for (PetscInt p = 0; p < Nf; ++p) {
229: const PetscInt face = iter_indices[p];
230: PetscInt num_indices, *indices;
231: PetscInt field_offsets[17]; // max number of fields plus 1
232: const PetscInt *supp;
233: PetscInt Ns;
235: PetscCall(DMPlexGetSupport(dm, face, &supp));
236: PetscCall(DMPlexGetSupportSize(dm, face, &Ns));
237: // Ignore boundary faces
238: // TODO check for face on parallel boundary
239: if (Ns == 2) {
240: // Essential boundary conditions are encoded as -(loc+1), but we don't care so we decode.
241: PetscCall(DMPlexGetClosureIndices(dm, section, section, supp[0], PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
242: for (PetscInt i = 0; i < cell_size; i++) {
243: const PetscInt loc = indices[field_offsets[dm_field] + i * (*num_comp)];
244: restr_indices_neg[face_offset_neg++] = loc >= 0 ? loc : -(loc + 1);
245: }
246: PetscCall(DMPlexRestoreClosureIndices(dm, section, section, supp[0], PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
247: PetscCall(DMPlexGetClosureIndices(dm, section, section, supp[1], PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
248: for (PetscInt i = 0; i < cell_size; i++) {
249: const PetscInt loc = indices[field_offsets[dm_field] + i * (*num_comp)];
250: restr_indices_pos[face_offset_pos++] = loc >= 0 ? loc : -(loc + 1);
251: }
252: PetscCall(DMPlexRestoreClosureIndices(dm, section, section, supp[1], PETSC_TRUE, &num_indices, &indices, field_offsets, NULL));
253: }
254: }
255: PetscCheck(face_offset_neg == restr_size, PETSC_COMM_SELF, PETSC_ERR_SUP, "Shape mismatch, neg offsets array of shape (%" PetscInt_FMT ", %" PetscInt_FMT ") initialized for %" PetscInt_FMT " nodes", *num_faces, cell_size, face_offset_neg);
256: PetscCheck(face_offset_pos == restr_size, PETSC_COMM_SELF, PETSC_ERR_SUP, "Shape mismatch, pos offsets array of shape (%" PetscInt_FMT ", %" PetscInt_FMT ") initialized for %" PetscInt_FMT " nodes", *num_faces, cell_size, face_offset_pos);
257: if (iter_is) PetscCall(ISRestoreIndices(iter_is, &iter_indices));
258: PetscCall(ISDestroy(&iter_is));
260: *offsetsNeg = restr_indices_neg;
261: *offsetsPos = restr_indices_pos;
262: PetscCall(PetscSectionGetStorageSize(section, l_size));
263: PetscFunctionReturn(PETSC_SUCCESS);
264: }
266: #if defined(PETSC_HAVE_LIBCEED)
267: #include <petscdmplexceed.h>
269: /*@C
270: DMPlexGetCeedRestriction - Define the libCEED map from the local vector (Lvector) to the cells (Evector)
272: Input Parameters:
273: + dm - The `DMPLEX` object
274: . domain_label - label for `DMPLEX` domain, or NULL for the whole domain
275: . label_value - Stratum value
276: . height - Height of target cells in `DMPLEX` topology
277: - dm_field - Index of `DMPLEX` field
279: Output Parameter:
280: . ERestrict - libCEED restriction from local vector to to the cells
282: Level: developer
284: .seealso: [](ch_unstructured), `DM`, `DMPLEX`, `DMLabel`, `DMPlexGetLocalOffsets()`
285: @*/
286: PetscErrorCode DMPlexGetCeedRestriction(DM dm, DMLabel domain_label, PetscInt label_value, PetscInt height, PetscInt dm_field, CeedElemRestriction *ERestrict)
287: {
288: PetscFunctionBeginUser;
291: if (!dm->ceedERestrict) {
292: PetscInt num_cells, cell_size, num_comp, lvec_size, *restr_indices;
293: CeedElemRestriction elem_restr;
294: Ceed ceed;
296: PetscCall(DMPlexGetLocalOffsets(dm, domain_label, label_value, height, dm_field, &num_cells, &cell_size, &num_comp, &lvec_size, &restr_indices));
297: PetscCall(DMGetCeed(dm, &ceed));
298: PetscCallCEED(CeedElemRestrictionCreate(ceed, num_cells, cell_size, num_comp, 1, lvec_size, CEED_MEM_HOST, CEED_COPY_VALUES, restr_indices, &elem_restr));
299: PetscCall(PetscFree(restr_indices));
300: dm->ceedERestrict = elem_restr;
301: }
302: *ERestrict = dm->ceedERestrict;
303: PetscFunctionReturn(PETSC_SUCCESS);
304: }
306: #endif