xref: /petsc/include/petscdm.h (revision a01d01fa3fdd0823377c6ff796306a39b7cfc3fd)
1 /*
2       Objects to manage the interactions between the mesh data structures and the algebraic objects
3 */
4 #if !defined(PETSCDM_H)
5 #define PETSCDM_H
6 #include <petscmat.h>
7 #include <petscdmtypes.h>
8 #include <petscfetypes.h>
9 #include <petscdstypes.h>
10 #include <petscdmlabel.h>
11 
12 PETSC_EXTERN PetscErrorCode DMInitializePackage(void);
13 
14 PETSC_EXTERN PetscClassId DM_CLASSID;
15 PETSC_EXTERN PetscClassId DMLABEL_CLASSID;
16 
17 #define DMLOCATEPOINT_POINT_NOT_FOUND -367
18 
19 /*J
20     DMType - String with the name of a PETSc DM
21 
22    Level: beginner
23 
24 .seealso: DMSetType(), DM
25 J*/
26 typedef const char* DMType;
27 #define DMDA        "da"
28 #define DMCOMPOSITE "composite"
29 #define DMSLICED    "sliced"
30 #define DMSHELL     "shell"
31 #define DMPLEX      "plex"
32 #define DMREDUNDANT "redundant"
33 #define DMPATCH     "patch"
34 #define DMMOAB      "moab"
35 #define DMNETWORK   "network"
36 #define DMFOREST    "forest"
37 #define DMP4EST     "p4est"
38 #define DMP8EST     "p8est"
39 #define DMSWARM     "swarm"
40 #define DMPRODUCT   "product"
41 #define DMSTAG      "stag"
42 
43 PETSC_EXTERN const char *const DMBoundaryTypes[];
44 PETSC_EXTERN const char *const DMBoundaryConditionTypes[];
45 PETSC_EXTERN PetscFunctionList DMList;
46 PETSC_EXTERN DMGeneratorFunctionList DMGenerateList;
47 PETSC_EXTERN PetscErrorCode DMCreate(MPI_Comm,DM*);
48 PETSC_EXTERN PetscErrorCode DMClone(DM,DM*);
49 PETSC_EXTERN PetscErrorCode DMSetType(DM, DMType);
50 PETSC_EXTERN PetscErrorCode DMGetType(DM, DMType *);
51 PETSC_EXTERN PetscErrorCode DMRegister(const char[],PetscErrorCode (*)(DM));
52 PETSC_EXTERN PetscErrorCode DMRegisterDestroy(void);
53 
54 PETSC_EXTERN PetscErrorCode DMView(DM,PetscViewer);
55 PETSC_EXTERN PetscErrorCode DMLoad(DM,PetscViewer);
56 PETSC_EXTERN PetscErrorCode DMDestroy(DM*);
57 PETSC_EXTERN PetscErrorCode DMCreateGlobalVector(DM,Vec*);
58 PETSC_EXTERN PetscErrorCode DMCreateLocalVector(DM,Vec*);
59 PETSC_EXTERN PetscErrorCode DMGetLocalVector(DM,Vec *);
60 PETSC_EXTERN PetscErrorCode DMRestoreLocalVector(DM,Vec *);
61 PETSC_EXTERN PetscErrorCode DMGetGlobalVector(DM,Vec *);
62 PETSC_EXTERN PetscErrorCode DMRestoreGlobalVector(DM,Vec *);
63 PETSC_EXTERN PetscErrorCode DMClearGlobalVectors(DM);
64 PETSC_EXTERN PetscErrorCode DMClearLocalVectors(DM);
65 PETSC_EXTERN PetscErrorCode DMHasNamedGlobalVector(DM,const char*,PetscBool*);
66 PETSC_EXTERN PetscErrorCode DMGetNamedGlobalVector(DM,const char*,Vec*);
67 PETSC_EXTERN PetscErrorCode DMRestoreNamedGlobalVector(DM,const char*,Vec*);
68 PETSC_EXTERN PetscErrorCode DMHasNamedLocalVector(DM,const char*,PetscBool*);
69 PETSC_EXTERN PetscErrorCode DMGetNamedLocalVector(DM,const char*,Vec*);
70 PETSC_EXTERN PetscErrorCode DMRestoreNamedLocalVector(DM,const char*,Vec*);
71 PETSC_EXTERN PetscErrorCode DMGetLocalToGlobalMapping(DM,ISLocalToGlobalMapping*);
72 PETSC_EXTERN PetscErrorCode DMCreateFieldIS(DM,PetscInt*,char***,IS**);
73 PETSC_EXTERN PetscErrorCode DMGetBlockSize(DM,PetscInt*);
74 PETSC_EXTERN PetscErrorCode DMCreateColoring(DM,ISColoringType,ISColoring*);
75 PETSC_EXTERN PetscErrorCode DMCreateMatrix(DM,Mat*);
76 PETSC_EXTERN PetscErrorCode DMSetMatrixPreallocateOnly(DM,PetscBool);
77 PETSC_EXTERN PetscErrorCode DMSetMatrixStructureOnly(DM,PetscBool);
78 PETSC_EXTERN PetscErrorCode DMCreateInterpolation(DM,DM,Mat*,Vec*);
79 PETSC_EXTERN PetscErrorCode DMCreateRestriction(DM,DM,Mat*);
80 PETSC_EXTERN PetscErrorCode DMCreateInjection(DM,DM,Mat*);
81 PETSC_EXTERN PetscErrorCode DMCreateMassMatrix(DM,DM,Mat*);
82 PETSC_EXTERN PetscErrorCode DMCreateMassMatrixLumped(DM,Vec*);
83 PETSC_EXTERN PetscErrorCode DMGetWorkArray(DM,PetscInt,MPI_Datatype,void*);
84 PETSC_EXTERN PetscErrorCode DMRestoreWorkArray(DM,PetscInt,MPI_Datatype,void*);
85 PETSC_EXTERN PetscErrorCode DMRefine(DM,MPI_Comm,DM*);
86 PETSC_EXTERN PetscErrorCode DMCoarsen(DM,MPI_Comm,DM*);
87 PETSC_EXTERN PetscErrorCode DMGetCoarseDM(DM,DM*);
88 PETSC_EXTERN PetscErrorCode DMSetCoarseDM(DM,DM);
89 PETSC_EXTERN PetscErrorCode DMGetFineDM(DM,DM*);
90 PETSC_EXTERN PetscErrorCode DMSetFineDM(DM,DM);
91 PETSC_EXTERN PetscErrorCode DMRefineHierarchy(DM,PetscInt,DM[]);
92 PETSC_EXTERN PetscErrorCode DMCoarsenHierarchy(DM,PetscInt,DM[]);
93 PETSC_EXTERN PetscErrorCode DMCoarsenHookAdd(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,Mat,Vec,Mat,DM,void*),void*);
94 PETSC_EXTERN PetscErrorCode DMCoarsenHookRemove(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,Mat,Vec,Mat,DM,void*),void*);
95 PETSC_EXTERN PetscErrorCode DMRefineHookAdd(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,Mat,DM,void*),void*);
96 PETSC_EXTERN PetscErrorCode DMRefineHookRemove(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,Mat,DM,void*),void*);
97 PETSC_EXTERN PetscErrorCode DMRestrict(DM,Mat,Vec,Mat,DM);
98 PETSC_EXTERN PetscErrorCode DMInterpolate(DM,Mat,DM);
99 PETSC_EXTERN PetscErrorCode DMInterpolateSolution(DM,DM,Mat,Vec,Vec);
100 PETSC_EXTERN PetscErrorCode DMExtrude(DM,PetscInt,DM*);
101 PETSC_EXTERN PetscErrorCode DMSetFromOptions(DM);
102 PETSC_EXTERN PetscErrorCode DMViewFromOptions(DM,PetscObject,const char[]);
103 
104 PETSC_EXTERN PetscErrorCode DMGenerate(DM, const char [], PetscBool , DM *);
105 PETSC_EXTERN PetscErrorCode DMGenerateRegister(const char[],PetscErrorCode (*)(DM,PetscBool,DM*),PetscErrorCode (*)(DM,PetscReal*,DM*),PetscErrorCode (*)(DM,Vec,DMLabel,DMLabel,DM*),PetscInt);
106 PETSC_EXTERN PetscErrorCode DMGenerateRegisterAll(void);
107 PETSC_EXTERN PetscErrorCode DMGenerateRegisterDestroy(void);
108 PETSC_EXTERN PetscErrorCode DMAdaptLabel(DM,DMLabel,DM*);
109 PETSC_EXTERN PetscErrorCode DMAdaptMetric(DM, Vec, DMLabel, DMLabel, DM *);
110 
111 PETSC_EXTERN PetscErrorCode DMSetUp(DM);
112 PETSC_EXTERN PetscErrorCode DMCreateInterpolationScale(DM,DM,Mat,Vec*);
113 PETSC_EXTERN PETSC_DEPRECATED_FUNCTION("Use DMDACreateAggregates() or DMCreateRestriction() (since version 3.12)") PetscErrorCode DMCreateAggregates(DM,DM,Mat*);
114 PETSC_EXTERN PetscErrorCode DMGlobalToLocalHookAdd(DM,PetscErrorCode (*)(DM,Vec,InsertMode,Vec,void*),PetscErrorCode (*)(DM,Vec,InsertMode,Vec,void*),void*);
115 PETSC_EXTERN PetscErrorCode DMLocalToGlobalHookAdd(DM,PetscErrorCode (*)(DM,Vec,InsertMode,Vec,void*),PetscErrorCode (*)(DM,Vec,InsertMode,Vec,void*),void*);
116 PETSC_EXTERN PetscErrorCode DMGlobalToLocal(DM,Vec,InsertMode,Vec);
117 PETSC_EXTERN PetscErrorCode DMGlobalToLocalBegin(DM,Vec,InsertMode,Vec);
118 PETSC_EXTERN PetscErrorCode DMGlobalToLocalEnd(DM,Vec,InsertMode,Vec);
119 PETSC_EXTERN PetscErrorCode DMLocalToGlobal(DM,Vec,InsertMode,Vec);
120 PETSC_EXTERN PetscErrorCode DMLocalToGlobalBegin(DM,Vec,InsertMode,Vec);
121 PETSC_EXTERN PetscErrorCode DMLocalToGlobalEnd(DM,Vec,InsertMode,Vec);
122 PETSC_EXTERN PetscErrorCode DMLocalToLocalBegin(DM,Vec,InsertMode,Vec);
123 PETSC_EXTERN PetscErrorCode DMLocalToLocalEnd(DM,Vec,InsertMode,Vec);
124 PETSC_EXTERN PetscErrorCode DMConvert(DM,DMType,DM*);
125 
126 /* Topology support */
127 PETSC_EXTERN PetscErrorCode DMGetDimension(DM,PetscInt*);
128 PETSC_EXTERN PetscErrorCode DMSetDimension(DM,PetscInt);
129 PETSC_EXTERN PetscErrorCode DMGetDimPoints(DM,PetscInt,PetscInt*,PetscInt*);
130 PETSC_EXTERN PetscErrorCode DMGetUseNatural(DM,PetscBool*);
131 PETSC_EXTERN PetscErrorCode DMSetUseNatural(DM,PetscBool);
132 
133 /* Coordinate support */
134 PETSC_EXTERN PetscErrorCode DMGetCoordinateDM(DM,DM*);
135 PETSC_EXTERN PetscErrorCode DMSetCoordinateDM(DM,DM);
136 PETSC_EXTERN PetscErrorCode DMGetCoordinateDim(DM,PetscInt*);
137 PETSC_EXTERN PetscErrorCode DMSetCoordinateDim(DM,PetscInt);
138 PETSC_EXTERN PetscErrorCode DMGetCoordinateSection(DM,PetscSection*);
139 PETSC_EXTERN PetscErrorCode DMSetCoordinateSection(DM,PetscInt,PetscSection);
140 PETSC_EXTERN PetscErrorCode DMGetCoordinates(DM,Vec*);
141 PETSC_EXTERN PetscErrorCode DMSetCoordinates(DM,Vec);
142 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocal(DM,Vec*);
143 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocalSetUp(DM);
144 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocalNoncollective(DM,Vec*);
145 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocalTuple(DM,IS,PetscSection*,Vec*);
146 PETSC_EXTERN PetscErrorCode DMSetCoordinatesLocal(DM,Vec);
147 PETSC_EXTERN PetscErrorCode DMLocatePoints(DM,Vec,DMPointLocationType,PetscSF*);
148 PETSC_EXTERN PetscErrorCode DMGetPeriodicity(DM,PetscBool*,const PetscReal**,const PetscReal**,const DMBoundaryType**);
149 PETSC_EXTERN PetscErrorCode DMSetPeriodicity(DM,PetscBool,const PetscReal[],const PetscReal[],const DMBoundaryType[]);
150 PETSC_EXTERN PetscErrorCode DMLocalizeCoordinate(DM, const PetscScalar[], PetscBool, PetscScalar[]);
151 PETSC_EXTERN PetscErrorCode DMLocalizeCoordinates(DM);
152 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocalized(DM,PetscBool*);
153 PETSC_EXTERN PetscErrorCode DMGetCoordinatesLocalizedLocal(DM,PetscBool*);
154 PETSC_EXTERN PetscErrorCode DMGetNeighbors(DM,PetscInt*,const PetscMPIInt**);
155 PETSC_EXTERN PetscErrorCode DMGetCoordinateField(DM,DMField*);
156 PETSC_EXTERN PetscErrorCode DMSetCoordinateField(DM,DMField);
157 PETSC_EXTERN PetscErrorCode DMGetBoundingBox(DM,PetscReal[],PetscReal[]);
158 PETSC_EXTERN PetscErrorCode DMGetLocalBoundingBox(DM,PetscReal[],PetscReal[]);
159 PETSC_EXTERN PetscErrorCode DMProjectCoordinates(DM,PetscFE);
160 
161 /* block hook interface */
162 PETSC_EXTERN PetscErrorCode DMSubDomainHookAdd(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,VecScatter,VecScatter,DM,void*),void*);
163 PETSC_EXTERN PetscErrorCode DMSubDomainHookRemove(DM,PetscErrorCode (*)(DM,DM,void*),PetscErrorCode (*)(DM,VecScatter,VecScatter,DM,void*),void*);
164 PETSC_EXTERN PetscErrorCode DMSubDomainRestrict(DM,VecScatter,VecScatter,DM);
165 
166 PETSC_EXTERN PetscErrorCode DMSetOptionsPrefix(DM,const char []);
167 PETSC_EXTERN PetscErrorCode DMAppendOptionsPrefix(DM,const char []);
168 PETSC_EXTERN PetscErrorCode DMGetOptionsPrefix(DM,const char*[]);
169 PETSC_EXTERN PetscErrorCode DMSetVecType(DM,VecType);
170 PETSC_EXTERN PetscErrorCode DMGetVecType(DM,VecType*);
171 PETSC_EXTERN PetscErrorCode DMSetMatType(DM,MatType);
172 PETSC_EXTERN PetscErrorCode DMGetMatType(DM,MatType*);
173 PETSC_EXTERN PetscErrorCode DMSetISColoringType(DM,ISColoringType);
174 PETSC_EXTERN PetscErrorCode DMGetISColoringType(DM,ISColoringType*);
175 PETSC_EXTERN PetscErrorCode DMSetApplicationContext(DM,void*);
176 PETSC_EXTERN PetscErrorCode DMSetApplicationContextDestroy(DM,PetscErrorCode (*)(void**));
177 PETSC_EXTERN PetscErrorCode DMGetApplicationContext(DM,void*);
178 PETSC_EXTERN PetscErrorCode DMSetVariableBounds(DM,PetscErrorCode (*)(DM,Vec,Vec));
179 PETSC_EXTERN PetscErrorCode DMHasVariableBounds(DM,PetscBool *);
180 PETSC_EXTERN PetscErrorCode DMHasColoring(DM,PetscBool *);
181 PETSC_EXTERN PetscErrorCode DMHasCreateRestriction(DM,PetscBool *);
182 PETSC_EXTERN PetscErrorCode DMHasCreateInjection(DM,PetscBool *);
183 PETSC_EXTERN PetscErrorCode DMComputeVariableBounds(DM,Vec,Vec);
184 
185 PETSC_EXTERN PetscErrorCode DMCreateSubDM(DM, PetscInt, const PetscInt[], IS *, DM *);
186 PETSC_EXTERN PetscErrorCode DMCreateSuperDM(DM[], PetscInt, IS **, DM *);
187 PETSC_EXTERN PetscErrorCode DMCreateSectionSubDM(DM,PetscInt,const PetscInt[],IS*,DM*);
188 PETSC_EXTERN PetscErrorCode DMCreateSectionSuperDM(DM[],PetscInt,IS**,DM*);
189 PETSC_EXTERN PetscErrorCode DMCreateFieldDecomposition(DM,PetscInt*,char***,IS**,DM**);
190 PETSC_EXTERN PetscErrorCode DMCreateDomainDecomposition(DM,PetscInt*,char***,IS**,IS**,DM**);
191 PETSC_EXTERN PetscErrorCode DMCreateDomainDecompositionScatters(DM,PetscInt,DM*,VecScatter**,VecScatter**,VecScatter**);
192 
193 PETSC_EXTERN PetscErrorCode DMGetRefineLevel(DM,PetscInt*);
194 PETSC_EXTERN PetscErrorCode DMSetRefineLevel(DM,PetscInt);
195 PETSC_EXTERN PetscErrorCode DMGetCoarsenLevel(DM,PetscInt*);
196 PETSC_EXTERN PetscErrorCode DMSetCoarsenLevel(DM,PetscInt);
197 PETSC_EXTERN PetscErrorCode DMFinalizePackage(void);
198 
199 PETSC_EXTERN PetscErrorCode VecGetDM(Vec, DM*);
200 PETSC_EXTERN PetscErrorCode VecSetDM(Vec, DM);
201 PETSC_EXTERN PetscErrorCode MatGetDM(Mat, DM*);
202 PETSC_EXTERN PetscErrorCode MatSetDM(Mat, DM);
203 PETSC_EXTERN PetscErrorCode MatFDColoringUseDM(Mat,MatFDColoring);
204 
205 typedef struct NLF_DAAD* NLF;
206 
207 #define DM_FILE_CLASSID 1211221
208 
209 /* FEM support */
210 PETSC_EXTERN PetscErrorCode DMPrintCellVector(PetscInt, const char [], PetscInt, const PetscScalar []);
211 PETSC_EXTERN PetscErrorCode DMPrintCellMatrix(PetscInt, const char [], PetscInt, PetscInt, const PetscScalar []);
212 PETSC_EXTERN PetscErrorCode DMPrintLocalVec(DM, const char [], PetscReal, Vec);
213 
214 PETSC_EXTERN PetscErrorCode DMSetNullSpaceConstructor(DM, PetscInt, PetscErrorCode (*)(DM, PetscInt, PetscInt, MatNullSpace *));
215 PETSC_EXTERN PetscErrorCode DMGetNullSpaceConstructor(DM, PetscInt, PetscErrorCode (**)(DM, PetscInt, PetscInt, MatNullSpace *));
216 PETSC_EXTERN PetscErrorCode DMSetNearNullSpaceConstructor(DM, PetscInt, PetscErrorCode (*)(DM, PetscInt, PetscInt, MatNullSpace *));
217 PETSC_EXTERN PetscErrorCode DMGetNearNullSpaceConstructor(DM, PetscInt, PetscErrorCode (**)(DM, PetscInt, PetscInt, MatNullSpace *));
218 
219 PETSC_EXTERN PetscErrorCode DMGetSection(DM, PetscSection *); /* Use DMGetLocalSection() in new code (since v3.12) */
220 PETSC_EXTERN PetscErrorCode DMSetSection(DM, PetscSection);   /* Use DMSetLocalSection() in new code (since v3.12) */
221 PETSC_EXTERN PetscErrorCode DMGetLocalSection(DM, PetscSection *);
222 PETSC_EXTERN PetscErrorCode DMSetLocalSection(DM, PetscSection);
223 PETSC_EXTERN PetscErrorCode DMGetGlobalSection(DM, PetscSection *);
224 PETSC_EXTERN PetscErrorCode DMSetGlobalSection(DM, PetscSection);
225 static inline PETSC_DEPRECATED_FUNCTION("Use DMGetSection() (since v3.9)") PetscErrorCode DMGetDefaultSection(DM dm, PetscSection *s) {return DMGetSection(dm,s);}
226 static inline PETSC_DEPRECATED_FUNCTION("Use DMSetSection() (since v3.9)") PetscErrorCode DMSetDefaultSection(DM dm, PetscSection s) {return DMSetSection(dm,s);}
227 static inline PETSC_DEPRECATED_FUNCTION("Use DMGetGlobalSection() (since v3.9)") PetscErrorCode DMGetDefaultGlobalSection(DM dm, PetscSection *s) {return DMGetGlobalSection(dm,s);}
228 static inline PETSC_DEPRECATED_FUNCTION("Use DMSetGlobalSection() (since v3.9)") PetscErrorCode DMSetDefaultGlobalSection(DM dm, PetscSection s) {return DMSetGlobalSection(dm,s);}
229 
230 PETSC_EXTERN PetscErrorCode DMGetSectionSF(DM, PetscSF*);
231 PETSC_EXTERN PetscErrorCode DMSetSectionSF(DM, PetscSF);
232 PETSC_EXTERN PetscErrorCode DMCreateSectionSF(DM, PetscSection, PetscSection);
233 static inline PETSC_DEPRECATED_FUNCTION("Use DMGetSectionSF() (since v3.12)") PetscErrorCode DMGetDefaultSF(DM dm, PetscSF *s) {return DMGetSectionSF(dm,s);}
234 static inline PETSC_DEPRECATED_FUNCTION("Use DMSetSectionSF() (since v3.12)") PetscErrorCode DMSetDefaultSF(DM dm, PetscSF s) {return DMSetSectionSF(dm,s);}
235 static inline PETSC_DEPRECATED_FUNCTION("Use DMCreateSectionSF() (since v3.12)") PetscErrorCode DMCreateDefaultSF(DM dm, PetscSection l, PetscSection g) {return DMCreateSectionSF(dm,l,g);}
236 PETSC_EXTERN PetscErrorCode DMGetPointSF(DM, PetscSF *);
237 PETSC_EXTERN PetscErrorCode DMSetPointSF(DM, PetscSF);
238 PETSC_EXTERN PetscErrorCode DMGetNaturalSF(DM, PetscSF *);
239 PETSC_EXTERN PetscErrorCode DMSetNaturalSF(DM, PetscSF);
240 
241 PETSC_EXTERN PetscErrorCode DMGetDefaultConstraints(DM, PetscSection *, Mat *);
242 PETSC_EXTERN PetscErrorCode DMSetDefaultConstraints(DM, PetscSection, Mat);
243 
244 PETSC_EXTERN PetscErrorCode DMGetOutputDM(DM, DM *);
245 PETSC_EXTERN PetscErrorCode DMGetOutputSequenceNumber(DM, PetscInt *, PetscReal *);
246 PETSC_EXTERN PetscErrorCode DMSetOutputSequenceNumber(DM, PetscInt, PetscReal);
247 PETSC_EXTERN PetscErrorCode DMOutputSequenceLoad(DM, PetscViewer, const char *, PetscInt, PetscReal *);
248 
249 PETSC_EXTERN PetscErrorCode DMGetNumFields(DM, PetscInt *);
250 PETSC_EXTERN PetscErrorCode DMSetNumFields(DM, PetscInt);
251 PETSC_EXTERN PetscErrorCode DMGetField(DM, PetscInt, DMLabel *, PetscObject *);
252 PETSC_EXTERN PetscErrorCode DMSetField(DM, PetscInt, DMLabel, PetscObject);
253 PETSC_EXTERN PetscErrorCode DMAddField(DM, DMLabel, PetscObject);
254 PETSC_EXTERN PetscErrorCode DMSetFieldAvoidTensor(DM, PetscInt, PetscBool);
255 PETSC_EXTERN PetscErrorCode DMGetFieldAvoidTensor(DM, PetscInt, PetscBool *);
256 PETSC_EXTERN PetscErrorCode DMClearFields(DM);
257 PETSC_EXTERN PetscErrorCode DMCopyFields(DM, DM);
258 PETSC_EXTERN PetscErrorCode DMGetAdjacency(DM, PetscInt, PetscBool *, PetscBool *);
259 PETSC_EXTERN PetscErrorCode DMSetAdjacency(DM, PetscInt, PetscBool, PetscBool);
260 PETSC_EXTERN PetscErrorCode DMGetBasicAdjacency(DM, PetscBool *, PetscBool *);
261 PETSC_EXTERN PetscErrorCode DMSetBasicAdjacency(DM, PetscBool, PetscBool);
262 
263 PETSC_EXTERN PetscErrorCode DMGetNumDS(DM, PetscInt *);
264 PETSC_EXTERN PetscErrorCode DMGetDS(DM, PetscDS *);
265 PETSC_EXTERN PetscErrorCode DMGetCellDS(DM, PetscInt, PetscDS *);
266 PETSC_EXTERN PetscErrorCode DMGetRegionDS(DM, DMLabel, IS *, PetscDS *);
267 PETSC_EXTERN PetscErrorCode DMSetRegionDS(DM, DMLabel, IS, PetscDS);
268 PETSC_EXTERN PetscErrorCode DMGetRegionNumDS(DM, PetscInt, DMLabel *, IS *, PetscDS *);
269 PETSC_EXTERN PetscErrorCode DMSetRegionNumDS(DM, PetscInt, DMLabel, IS, PetscDS);
270 PETSC_EXTERN PetscErrorCode DMFindRegionNum(DM, PetscDS, PetscInt *);
271 PETSC_EXTERN PetscErrorCode DMCreateFEDefault(DM, PetscInt, const char[], PetscInt, PetscFE *);
272 PETSC_EXTERN PetscErrorCode DMCreateDS(DM);
273 PETSC_EXTERN PetscErrorCode DMClearDS(DM);
274 PETSC_EXTERN PetscErrorCode DMCopyDS(DM, DM);
275 PETSC_EXTERN PetscErrorCode DMCopyDisc(DM, DM);
276 PETSC_EXTERN PetscErrorCode DMComputeExactSolution(DM, PetscReal, Vec, Vec);
277 PETSC_EXTERN PetscErrorCode DMGetNumAuxiliaryVec(DM, PetscInt *);
278 PETSC_EXTERN PetscErrorCode DMGetAuxiliaryVec(DM, DMLabel, PetscInt, Vec *);
279 PETSC_EXTERN PetscErrorCode DMSetAuxiliaryVec(DM, DMLabel, PetscInt, Vec);
280 PETSC_EXTERN PetscErrorCode DMGetAuxiliaryLabels(DM, DMLabel[], PetscInt[]);
281 PETSC_EXTERN PetscErrorCode DMCopyAuxiliaryVec(DM, DM);
282 
283 /*MC
284   DMInterpolationInfo - Structure for holding information about interpolation on a mesh
285 
286   Level: intermediate
287 
288   Synopsis:
289     comm   - The communicator
290     dim    - The spatial dimension of points
291     nInput - The number of input points
292     points - The input point coordinates
293     cells  - The cell containing each point
294     n      - The number of local points
295     coords - The point coordinates
296     dof    - The number of components to interpolate
297 
298 .seealso: DMInterpolationCreate(), DMInterpolationEvaluate(), DMInterpolationAddPoints()
299 M*/
300 struct _DMInterpolationInfo {
301   MPI_Comm   comm;
302   PetscInt   dim;    /*1 The spatial dimension of points */
303   PetscInt   nInput; /* The number of input points */
304   PetscReal *points; /* The input point coordinates */
305   PetscInt  *cells;  /* The cell containing each point */
306   PetscInt   n;      /* The number of local points */
307   Vec        coords; /* The point coordinates */
308   PetscInt   dof;    /* The number of components to interpolate */
309 };
310 typedef struct _DMInterpolationInfo *DMInterpolationInfo;
311 
312 PETSC_EXTERN PetscErrorCode DMInterpolationCreate(MPI_Comm, DMInterpolationInfo *);
313 PETSC_EXTERN PetscErrorCode DMInterpolationSetDim(DMInterpolationInfo, PetscInt);
314 PETSC_EXTERN PetscErrorCode DMInterpolationGetDim(DMInterpolationInfo, PetscInt *);
315 PETSC_EXTERN PetscErrorCode DMInterpolationSetDof(DMInterpolationInfo, PetscInt);
316 PETSC_EXTERN PetscErrorCode DMInterpolationGetDof(DMInterpolationInfo, PetscInt *);
317 PETSC_EXTERN PetscErrorCode DMInterpolationAddPoints(DMInterpolationInfo, PetscInt, PetscReal[]);
318 PETSC_EXTERN PetscErrorCode DMInterpolationSetUp(DMInterpolationInfo, DM, PetscBool, PetscBool);
319 PETSC_EXTERN PetscErrorCode DMInterpolationGetCoordinates(DMInterpolationInfo, Vec *);
320 PETSC_EXTERN PetscErrorCode DMInterpolationGetVector(DMInterpolationInfo, Vec *);
321 PETSC_EXTERN PetscErrorCode DMInterpolationRestoreVector(DMInterpolationInfo, Vec *);
322 PETSC_EXTERN PetscErrorCode DMInterpolationEvaluate(DMInterpolationInfo, DM, Vec, Vec);
323 PETSC_EXTERN PetscErrorCode DMInterpolationDestroy(DMInterpolationInfo *);
324 
325 PETSC_EXTERN PetscErrorCode DMCreateLabel(DM, const char []);
326 PETSC_EXTERN PetscErrorCode DMGetLabelValue(DM, const char[], PetscInt, PetscInt *);
327 PETSC_EXTERN PetscErrorCode DMSetLabelValue(DM, const char[], PetscInt, PetscInt);
328 PETSC_EXTERN PetscErrorCode DMClearLabelValue(DM, const char[], PetscInt, PetscInt);
329 PETSC_EXTERN PetscErrorCode DMGetLabelSize(DM, const char[], PetscInt *);
330 PETSC_EXTERN PetscErrorCode DMGetLabelIdIS(DM, const char[], IS *);
331 PETSC_EXTERN PetscErrorCode DMGetStratumSize(DM, const char [], PetscInt, PetscInt *);
332 PETSC_EXTERN PetscErrorCode DMGetStratumIS(DM, const char [], PetscInt, IS *);
333 PETSC_EXTERN PetscErrorCode DMSetStratumIS(DM, const char [], PetscInt, IS);
334 PETSC_EXTERN PetscErrorCode DMClearLabelStratum(DM, const char[], PetscInt);
335 PETSC_EXTERN PetscErrorCode DMGetLabelOutput(DM, const char[], PetscBool *);
336 PETSC_EXTERN PetscErrorCode DMSetLabelOutput(DM, const char[], PetscBool);
337 PETSC_EXTERN PetscErrorCode DMGetFirstLabeledPoint(DM, DM, DMLabel, PetscInt, const PetscInt *, PetscInt, PetscInt *, PetscDS *);
338 
339 /*E
340    DMCopyLabelsMode - Determines how DMCopyLabels() behaves when there is a DMLabel in the source and destination DMs with the same name
341 
342    Level: advanced
343 
344 $ DM_COPY_LABELS_REPLACE  - replace label in destination by label from source
345 $ DM_COPY_LABELS_KEEP     - keep destination label
346 $ DM_COPY_LABELS_FAIL     - throw error
347 
348 E*/
349 typedef enum {DM_COPY_LABELS_REPLACE, DM_COPY_LABELS_KEEP, DM_COPY_LABELS_FAIL} DMCopyLabelsMode;
350 PETSC_EXTERN const char *const DMCopyLabelsModes[];
351 
352 PETSC_EXTERN PetscErrorCode DMGetNumLabels(DM, PetscInt *);
353 PETSC_EXTERN PetscErrorCode DMGetLabelName(DM, PetscInt, const char **);
354 PETSC_EXTERN PetscErrorCode DMHasLabel(DM, const char [], PetscBool *);
355 PETSC_EXTERN PetscErrorCode DMGetLabel(DM, const char *, DMLabel *);
356 PETSC_EXTERN PetscErrorCode DMSetLabel(DM, DMLabel);
357 PETSC_EXTERN PetscErrorCode DMGetLabelByNum(DM, PetscInt, DMLabel *);
358 PETSC_EXTERN PetscErrorCode DMAddLabel(DM, DMLabel);
359 PETSC_EXTERN PetscErrorCode DMRemoveLabel(DM, const char [], DMLabel *);
360 PETSC_EXTERN PetscErrorCode DMRemoveLabelBySelf(DM, DMLabel *, PetscBool);
361 PETSC_EXTERN PetscErrorCode DMCopyLabels(DM, DM, PetscCopyMode, PetscBool, DMCopyLabelsMode emode);
362 PETSC_EXTERN PetscErrorCode DMCompareLabels(DM, DM, PetscBool *, char **);
363 
364 PETSC_EXTERN PetscErrorCode DMAddBoundary(DM, DMBoundaryConditionType, const char[], DMLabel, PetscInt, const PetscInt[], PetscInt, PetscInt, const PetscInt[], void (*)(void), void (*)(void), void *, PetscInt *);
365 PETSC_EXTERN PetscErrorCode DMIsBoundaryPoint(DM, PetscInt, PetscBool *);
366 
367 PETSC_EXTERN PetscErrorCode DMProjectFunction(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void**,InsertMode,Vec);
368 PETSC_EXTERN PetscErrorCode DMProjectFunctionLocal(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void**,InsertMode,Vec);
369 PETSC_EXTERN PetscErrorCode DMProjectFunctionLabel(DM, PetscReal, DMLabel, PetscInt, const PetscInt[], PetscInt, const PetscInt[], PetscErrorCode (**)(PetscInt, PetscReal, const PetscReal [], PetscInt, PetscScalar *, void *), void **, InsertMode, Vec);
370 PETSC_EXTERN PetscErrorCode DMProjectFunctionLabelLocal(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void **,InsertMode,Vec);
371 PETSC_EXTERN PetscErrorCode DMProjectFieldLocal(DM,PetscReal,Vec,void (**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
372 PETSC_EXTERN PetscErrorCode DMProjectFieldLabelLocal(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Vec,void (**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
373 PETSC_EXTERN PetscErrorCode DMProjectBdFieldLabelLocal(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Vec,void (**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
374 PETSC_EXTERN PetscErrorCode DMComputeL2Diff(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void **,Vec,PetscReal *);
375 PETSC_EXTERN PetscErrorCode DMComputeL2GradientDiff(DM, PetscReal, PetscErrorCode (**)(PetscInt, PetscReal, const PetscReal [], const PetscReal [], PetscInt, PetscScalar *, void *), void **, Vec, const PetscReal [], PetscReal *);
376 PETSC_EXTERN PetscErrorCode DMComputeL2FieldDiff(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void **,Vec,PetscReal *);
377 PETSC_EXTERN PetscErrorCode DMComputeError(DM, Vec, PetscReal[], Vec *);
378 PETSC_EXTERN PetscErrorCode DMHasBasisTransform(DM,PetscBool*);
379 PETSC_EXTERN PetscErrorCode DMCopyTransform(DM, DM);
380 
381 PETSC_EXTERN PetscErrorCode DMGetCompatibility(DM,DM,PetscBool*,PetscBool*);
382 
383 PETSC_EXTERN PetscErrorCode DMMonitorSet(DM, PetscErrorCode (*)(DM, void *), void *, PetscErrorCode (*)(void**));
384 PETSC_EXTERN PetscErrorCode DMMonitorCancel(DM);
385 PETSC_EXTERN PetscErrorCode DMMonitorSetFromOptions(DM, const char[], const char[], const char[], PetscErrorCode (*)(DM, void *), PetscErrorCode (*)(DM, PetscViewerAndFormat *), PetscBool *);
386 PETSC_EXTERN PetscErrorCode DMMonitor(DM);
387 
388 static inline PetscInt DMPolytopeTypeGetDim(DMPolytopeType ct)
389 {
390   switch (ct) {
391     case DM_POLYTOPE_POINT:
392       return 0;
393     case DM_POLYTOPE_SEGMENT:
394     case DM_POLYTOPE_POINT_PRISM_TENSOR:
395       return 1;
396     case DM_POLYTOPE_TRIANGLE:
397     case DM_POLYTOPE_QUADRILATERAL:
398     case DM_POLYTOPE_SEG_PRISM_TENSOR:
399       return 2;
400     case DM_POLYTOPE_TETRAHEDRON:
401     case DM_POLYTOPE_HEXAHEDRON:
402     case DM_POLYTOPE_TRI_PRISM:
403     case DM_POLYTOPE_TRI_PRISM_TENSOR:
404     case DM_POLYTOPE_QUAD_PRISM_TENSOR:
405     case DM_POLYTOPE_PYRAMID:
406       return 3;
407     default: return -1;
408   }
409 }
410 
411 static inline PetscInt DMPolytopeTypeGetConeSize(DMPolytopeType ct)
412 {
413   switch (ct) {
414     case DM_POLYTOPE_POINT:              return 0;
415     case DM_POLYTOPE_SEGMENT:            return 2;
416     case DM_POLYTOPE_POINT_PRISM_TENSOR: return 2;
417     case DM_POLYTOPE_TRIANGLE:           return 3;
418     case DM_POLYTOPE_QUADRILATERAL:      return 4;
419     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return 4;
420     case DM_POLYTOPE_TETRAHEDRON:        return 4;
421     case DM_POLYTOPE_HEXAHEDRON:         return 6;
422     case DM_POLYTOPE_TRI_PRISM:          return 5;
423     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return 5;
424     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return 6;
425     case DM_POLYTOPE_PYRAMID:            return 5;
426     default: return -1;
427   }
428 }
429 
430 static inline PetscInt DMPolytopeTypeGetNumVertices(DMPolytopeType ct)
431 {
432   switch (ct) {
433     case DM_POLYTOPE_POINT:              return 1;
434     case DM_POLYTOPE_SEGMENT:            return 2;
435     case DM_POLYTOPE_POINT_PRISM_TENSOR: return 2;
436     case DM_POLYTOPE_TRIANGLE:           return 3;
437     case DM_POLYTOPE_QUADRILATERAL:      return 4;
438     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return 4;
439     case DM_POLYTOPE_TETRAHEDRON:        return 4;
440     case DM_POLYTOPE_HEXAHEDRON:         return 8;
441     case DM_POLYTOPE_TRI_PRISM:          return 6;
442     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return 6;
443     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return 8;
444     case DM_POLYTOPE_PYRAMID:            return 5;
445     default: return -1;
446   }
447 }
448 
449 static inline DMPolytopeType DMPolytopeTypeSimpleShape(PetscInt dim, PetscBool simplex)
450 {
451   return dim == 0 ? DM_POLYTOPE_POINT :
452         (dim == 1 ? DM_POLYTOPE_SEGMENT :
453         (dim == 2 ? (simplex ? DM_POLYTOPE_TRIANGLE : DM_POLYTOPE_QUADRILATERAL) :
454         (dim == 3 ? (simplex ? DM_POLYTOPE_TETRAHEDRON : DM_POLYTOPE_HEXAHEDRON) : DM_POLYTOPE_UNKNOWN)));
455 }
456 
457 static inline PetscInt DMPolytopeTypeGetNumArrangments(DMPolytopeType ct)
458 {
459   switch (ct) {
460     case DM_POLYTOPE_POINT:              return 1;
461     case DM_POLYTOPE_SEGMENT:            return 2;
462     case DM_POLYTOPE_POINT_PRISM_TENSOR: return 2;
463     case DM_POLYTOPE_TRIANGLE:           return 6;
464     case DM_POLYTOPE_QUADRILATERAL:      return 8;
465     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return 4;
466     case DM_POLYTOPE_TETRAHEDRON:        return 24;
467     case DM_POLYTOPE_HEXAHEDRON:         return 48;
468     case DM_POLYTOPE_TRI_PRISM:          return 12;
469     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return 12;
470     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return 16;
471     case DM_POLYTOPE_PYRAMID:            return 8;
472     default: return -1;
473   }
474 }
475 
476 /* An arrangement is a face order combined with an orientation for each face */
477 static inline const PetscInt *DMPolytopeTypeGetArrangment(DMPolytopeType ct, PetscInt o)
478 {
479   static const PetscInt pntArr[1*2] = {0, 0};
480   /* a: swap */
481   static const PetscInt segArr[2*2*2] = {
482     1, 0,  0, 0, /* -1: a */
483     0, 0,  1, 0, /*  0: e */};
484   /* a: swap first two
485      b: swap last two */
486   static const PetscInt triArr[6*3*2] = {
487     0, -1,  2, -1,  1, -1, /* -3: b */
488     2, -1,  1, -1,  0, -1, /* -2: aba */
489     1, -1,  0, -1,  2, -1, /* -1: a */
490     0,  0,  1,  0,  2,  0, /*  0: identity */
491     1,  0,  2,  0,  0,  0, /*  1: ba */
492     2,  0,  0,  0,  1,  0, /*  2: ab */};
493   /* a: forward cyclic permutation
494      b: swap first and last pairs */
495   static const PetscInt quadArr[8*4*2] = {
496     1, -1,  0, -1,  3, -1,  2, -1, /* -4: b */
497     0, -1,  3, -1,  2, -1,  1, -1, /* -3: b a^3 = a b */
498     3, -1,  2, -1,  1, -1,  0, -1, /* -2: b a^2 = a^2 b */
499     2, -1,  1, -1,  0, -1,  3, -1, /* -1: b a   = a^3 b */
500     0,  0,  1,  0,  2,  0,  3,  0, /*  0: identity */
501     1,  0,  2,  0,  3,  0,  0,  0, /*  1: a */
502     2,  0,  3,  0,  0,  0,  1,  0, /*  2: a^2 */
503     3,  0,  0,  0,  1,  0,  2,  0, /*  3: a^3 */};
504   /* r: rotate 180
505      b: swap top and bottom segments */
506   static const PetscInt tsegArr[4*4*2] = {
507     1, -1,  0, -1,  3, -1,  2, -1, /* -2: r b */
508     0, -1,  1, -1,  3,  0,  2,  0, /* -1: r */
509     0,  0,  1,  0,  2,  0,  3,  0, /*  0: identity */
510     1,  0,  0,  0,  2, -1,  3, -1, /*  1: b */};
511   /* https://en.wikiversity.org/wiki/Symmetric_group_S4 */
512   static const PetscInt tetArr[24*4*2] = {
513     3, -2,  2, -3,  0, -1,  1, -1, /* -12: (1324)   p22 */
514     3, -1,  1, -3,  2, -1,  0, -1, /* -11: (14)     p21 */
515     3, -3,  0, -3,  1, -1,  2, -1, /* -10: (1234)   p18 */
516     2, -1,  3, -1,  1, -3,  0, -2, /*  -9: (1423)   p17 */
517     2, -3,  0, -1,  3, -2,  1, -3, /*  -8: (1342)   p13 */
518     2, -2,  1, -2,  0, -2,  3, -2, /*  -7: (24)     p14 */
519     1, -2,  0, -2,  2, -2,  3, -1, /*  -6: (34)     p6  */
520     1, -1,  3, -3,  0, -3,  2, -2, /*  -5: (1243)   p10 */
521     1, -3,  2, -1,  3, -1,  0, -3, /*  -4: (1432)   p9  */
522     0, -3,  1, -1,  3, -3,  2, -3, /*  -3: (12)     p1  */
523     0, -2,  2, -2,  1, -2,  3, -3, /*  -2: (23)     p2  */
524     0, -1,  3, -2,  2, -3,  1, -2, /*  -1: (13)     p5  */
525     0,  0,  1,  0,  2,  0,  3,  0, /*   0: ()       p0  */
526     0,  1,  3,  1,  1,  2,  2,  0, /*   1: (123)    p4  */
527     0,  2,  2,  1,  3,  0,  1,  2, /*   2: (132)    p3  */
528     1,  2,  0,  1,  3,  1,  2,  2, /*   3: (12)(34) p7  */
529     1,  0,  2,  0,  0,  0,  3,  1, /*   4: (243)    p8  */
530     1,  1,  3,  2,  2,  2,  0,  0, /*   5: (143)    p11 */
531     2,  1,  3,  0,  0,  2,  1,  0, /*   6: (13)(24) p16 */
532     2,  2,  1,  1,  3,  2,  0,  2, /*   7: (142)    p15 */
533     2,  0,  0,  0,  1,  0,  3,  2, /*   8: (234)    p12 */
534     3,  2,  2,  2,  1,  1,  0,  1, /*   9: (14)(23) p23 */
535     3,  0,  0,  2,  2,  1,  1,  1, /*  10: (134)    p19 */
536     3,  1,  1,  2,  0,  1,  2,  1  /*  11: (124)    p20 */};
537   /* Each rotation determines a permutation of the four diagonals, and this defines the isomorphism with S_4 */
538   static const PetscInt hexArr[48*6*2] = {
539     2, -3,  3, -2,  4, -2,  5, -3,  1, -3,  0, -1, /* -24: reflect bottom and use -3 on top */
540     4, -2,  5, -2,  0, -1,  1, -4,  3, -2,  2, -3, /* -23: reflect bottom and use -3 on top */
541     5, -3,  4, -1,  1, -2,  0, -3,  3, -4,  2, -1, /* -22: reflect bottom and use -3 on top */
542     3, -1,  2, -4,  4, -4,  5, -1,  0, -4,  1, -4, /* -21: reflect bottom and use -3 on top */
543     3, -3,  2, -2,  5, -1,  4, -4,  1, -1,  0, -3, /* -20: reflect bottom and use -3 on top */
544     4, -4,  5, -4,  1, -4,  0, -1,  2, -4,  3, -1, /* -19: reflect bottom and use -3 on top */
545     2, -1,  3, -4,  5, -3,  4, -2,  0, -2,  1, -2, /* -18: reflect bottom and use -3 on top */
546     5, -1,  4, -3,  0, -3,  1, -2,  2, -2,  3, -3, /* -17: reflect bottom and use -3 on top */
547     4, -3,  5, -1,  3, -2,  2, -4,  1, -4,  0, -4, /* -16: reflect bottom and use -3 on top */
548     5, -4,  4, -4,  3, -4,  2, -2,  0, -3,  1, -1, /* -15: reflect bottom and use -3 on top */
549     3, -4,  2, -1,  1, -1,  0, -4,  4, -4,  5, -4, /* -14: reflect bottom and use -3 on top */
550     2, -2,  3, -3,  0, -2,  1, -3,  4, -2,  5, -2, /* -13: reflect bottom and use -3 on top */
551     1, -3,  0, -1,  4, -1,  5, -4,  3, -1,  2, -4, /* -12: reflect bottom and use -3 on top */
552     1, -1,  0, -3,  5, -4,  4, -1,  2, -1,  3, -4, /* -11: reflect bottom and use -3 on top */
553     5, -2,  4, -2,  2, -2,  3, -4,  1, -2,  0, -2, /* -10: reflect bottom and use -3 on top */
554     1, -2,  0, -2,  2, -1,  3, -1,  4, -1,  5, -3, /*  -9: reflect bottom and use -3 on top */
555     4, -1,  5, -3,  2, -4,  3, -2,  0, -1,  1, -3, /*  -8: reflect bottom and use -3 on top */
556     3, -2,  2, -3,  0, -4,  1, -1,  5, -1,  4, -3, /*  -7: reflect bottom and use -3 on top */
557     1, -4,  0, -4,  3, -1,  2, -1,  5, -4,  4, -4, /*  -6: reflect bottom and use -3 on top */
558     2, -4,  3, -1,  1, -3,  0, -2,  5, -3,  4, -1, /*  -5: reflect bottom and use -3 on top */
559     0, -4,  1, -4,  4, -3,  5, -2,  2, -3,  3, -2, /*  -4: reflect bottom and use -3 on top */
560     0, -3,  1, -1,  3, -3,  2, -3,  4, -3,  5, -1, /*  -3: reflect bottom and use -3 on top */
561     0, -2,  1, -2,  5, -2,  4, -3,  3, -3,  2, -2, /*  -2: reflect bottom and use -3 on top */
562     0, -1,  1, -3,  2, -3,  3, -3,  5, -2,  4, -2, /*  -1: reflect bottom and use -3 on top */
563     0,  0,  1,  0,  2,  0,  3,  0,  4,  0,  5,  0, /*   0: identity */
564     0,  1,  1,  3,  5,  3,  4,  0,  2,  0,  3,  1, /*   1: 90  rotation about z */
565     0,  2,  1,  2,  3,  0,  2,  0,  5,  3,  4,  1, /*   2: 180 rotation about z */
566     0,  3,  1,  1,  4,  0,  5,  3,  3,  0,  2,  1, /*   3: 270 rotation about z */
567     2,  3,  3,  2,  1,  0,  0,  3,  4,  3,  5,  1, /*   4: 90  rotation about x */
568     1,  3,  0,  1,  3,  2,  2,  2,  4,  2,  5,  2, /*   5: 180 rotation about x */
569     3,  1,  2,  0,  0,  1,  1,  2,  4,  1,  5,  3, /*   6: 270 rotation about x */
570     4,  0,  5,  0,  2,  1,  3,  3,  1,  1,  0,  3, /*   7: 90  rotation about y */
571     1,  1,  0,  3,  2,  2,  3,  2,  5,  1,  4,  3, /*   8: 180 rotation about y */
572     5,  1,  4,  3,  2,  3,  3,  1,  0,  0,  1,  0, /*   9: 270 rotation about y */
573     1,  0,  0,  0,  5,  1,  4,  2,  3,  2,  2,  3, /*  10: 180 rotation about x+y */
574     1,  2,  0,  2,  4,  2,  5,  1,  2,  2,  3,  3, /*  11: 180 rotation about x-y */
575     2,  1,  3,  0,  0,  3,  1,  0,  5,  0,  4,  0, /*  12: 180 rotation about y+z */
576     3,  3,  2,  2,  1,  2,  0,  1,  5,  2,  4,  2, /*  13: 180 rotation about y-z */
577     5,  3,  4,  1,  3,  1,  2,  3,  1,  3,  0,  1, /*  14: 180 rotation about z+x */
578     4,  2,  5,  2,  3,  3,  2,  1,  0,  2,  1,  2, /*  15: 180 rotation about z-x */
579     5,  0,  4,  0,  0,  0,  1,  3,  3,  1,  2,  0, /*  16: 120 rotation about x+y+z (v0v6) */
580     2,  0,  3,  1,  5,  0,  4,  3,  1,  0,  0,  0, /*  17: 240 rotation about x+y+z (v0v6) */
581     4,  3,  5,  1,  1,  1,  0,  2,  3,  3,  2,  2, /*  18: 120 rotation about x+y-z (v4v2) */
582     3,  2,  2,  3,  5,  2,  4,  1,  0,  1,  1,  3, /*  19: 240 rotation about x+y-z (v4v2) */
583     3,  0,  2,  1,  4,  1,  5,  2,  1,  2,  0,  2, /*  20: 120 rotation about x-y+z (v1v5) */
584     5,  2,  4,  2,  1,  3,  0,  0,  2,  3,  3,  2, /*  21: 240 rotation about x-y+z (v1v5) */
585     4,  1,  5,  3,  0,  2,  1,  1,  2,  1,  3,  0, /*  22: 120 rotation about x-y-z (v7v3) */
586     2,  2,  3,  3,  4,  3,  5,  0,  0,  3,  1,  1, /*  23: 240 rotation about x-y-z (v7v3) */
587   };
588   static const PetscInt tripArr[12*5*2] = {
589     1, -3,  0, -1,  3, -1,  4, -1,  2, -1, /* -6: reflect bottom and top */
590     1, -1,  0, -3,  4, -1,  2, -1,  3, -1, /* -5: reflect bottom and top */
591     1, -2,  0, -2,  2, -1,  3, -1,  4, -1, /* -4: reflect bottom and top */
592     0, -3,  1, -1,  3, -3,  2, -3,  4, -3, /* -3: reflect bottom and top */
593     0, -2,  1, -2,  4, -3,  3, -3,  2, -3, /* -2: reflect bottom and top */
594     0, -1,  1, -3,  2, -3,  4, -3,  3, -3, /* -1: reflect bottom and top */
595     0,  0,  1,  0,  2,  0,  3,  0,  4,  0, /*  0: identity */
596     0,  1,  1,  2,  4,  0,  2,  0,  3,  0, /*  1: 120 rotation about z */
597     0,  2,  1,  1,  3,  0,  4,  0,  2,  0, /*  2: 240 rotation about z */
598     1,  1,  0,  2,  2,  2,  4,  2,  3,  2, /*  3: 180 rotation about y of 0 */
599     1,  0,  0,  0,  4,  2,  3,  2,  2,  2, /*  4: 180 rotation about y of 1 */
600     1,  2,  0,  1,  3,  2,  2,  2,  4,  2, /*  5: 180 rotation about y of 2 */
601   };
602   /* a: rotate 120 about z
603      b: swap top and bottom segments
604      r: reflect */
605   static const PetscInt ttriArr[12*5*2] = {
606     1, -3,  0, -3,  2, -2,  4, -2,  3, -2, /* -6: r b a^2 */
607     1, -2,  0, -2,  4, -2,  3, -2,  2, -2, /* -5: r b a */
608     1, -1,  0, -1,  3, -2,  2, -2,  4, -2, /* -4: r b */
609     0, -3,  1, -3,  2, -1,  4, -1,  3, -1, /* -3: r a^2 */
610     0, -2,  1, -2,  4, -1,  3, -1,  2, -1, /* -2: r a */
611     0, -1,  1, -1,  3, -1,  2, -1,  4, -1, /* -1: r */
612     0,  0,  1,  0,  2,  0,  3,  0,  4,  0, /*  0: identity */
613     0,  1,  1,  1,  3,  0,  4,  0,  2,  0, /*  1: a */
614     0,  2,  1,  2,  4,  0,  2,  0,  3,  0, /*  2: a^2 */
615     1,  0,  0,  0,  2,  1,  3,  1,  4,  1, /*  3: b */
616     1,  1,  0,  1,  3,  1,  4,  1,  2,  1, /*  4: b a */
617     1,  2,  0,  2,  4,  1,  2,  1,  3,  1, /*  5: b a^2 */
618   };
619   /* a: rotate 90 about z
620      b: swap top and bottom segments
621      r: reflect */
622   static const PetscInt tquadArr[16*6*2] = {
623     1, -4,  0, -4,  3, -2,  2, -2,  5, -2,  4, -2, /* -8: r b a^3 */
624     1, -3,  0, -3,  2, -2,  5, -2,  4, -2,  3, -2, /* -7: r b a^2 */
625     1, -2,  0, -2,  5, -2,  4, -2,  3, -2,  2, -2, /* -6: r b a */
626     1, -1,  0, -1,  4, -2,  3, -2,  2, -2,  5, -2, /* -5: r b */
627     0, -4,  1, -4,  3, -1,  2, -1,  5, -1,  4, -1, /* -4: r a^3 */
628     0, -3,  1, -3,  2, -1,  5, -1,  4, -1,  3, -1, /* -3: r a^2 */
629     0, -2,  1, -2,  5, -1,  4, -1,  3, -1,  2, -1, /* -2: r a */
630     0, -1,  1, -1,  4, -1,  3, -1,  2, -1,  5, -1, /* -1: r */
631     0,  0,  1,  0,  2,  0,  3,  0,  4,  0,  5,  0, /*  0: identity */
632     0,  1,  1,  1,  3,  0,  4,  0,  5,  0,  2,  0, /*  1: a */
633     0,  2,  1,  2,  4,  0,  5,  0,  2,  0,  3,  0, /*  2: a^2 */
634     0,  3,  1,  3,  5,  0,  2,  0,  3,  0,  4,  0, /*  3: a^3 */
635     1,  0,  0,  0,  2,  1,  3,  1,  4,  1,  5,  1, /*  4: b */
636     1,  1,  0,  1,  3,  1,  4,  1,  5,  1,  2,  1, /*  5: b a */
637     1,  2,  0,  2,  4,  1,  5,  1,  2,  1,  3,  1, /*  6: b a^2 */
638     1,  3,  0,  3,  5,  1,  2,  1,  3,  1,  4,  1, /*  7: b a^3 */
639   };
640   static const PetscInt pyrArr[8*5*2] = {
641     0, -4,  2, -3,  1, -3,  4, -3,  3, -3, /* -4: Reflect bottom face */
642     0, -3,  3, -3,  2, -3,  1, -3,  4, -3, /* -3: Reflect bottom face */
643     0, -2,  4, -3,  3, -3,  2, -3,  1, -3, /* -2: Reflect bottom face */
644     0, -1,  1, -3,  4, -3,  3, -3,  2, -3, /* -1: Reflect bottom face */
645     0,  0,  1,  0,  2,  0,  3,  0,  4,  0, /*  0: identity */
646     0,  1,  4,  0,  1,  0,  2,  0,  3,  0, /*  1:  90 rotation about z */
647     0,  2,  3,  0,  4,  0,  1,  0,  2,  0, /*  2: 180 rotation about z */
648     0,  3,  2,  0,  3,  0,  4,  0,  1,  0, /*  3: 270 rotation about z */
649   };
650   switch (ct) {
651     case DM_POLYTOPE_POINT:              return pntArr;
652     case DM_POLYTOPE_SEGMENT:            return &segArr[(o+1)*2*2];
653     case DM_POLYTOPE_POINT_PRISM_TENSOR: return &segArr[(o+1)*2*2];
654     case DM_POLYTOPE_TRIANGLE:           return &triArr[(o+3)*3*2];
655     case DM_POLYTOPE_QUADRILATERAL:      return &quadArr[(o+4)*4*2];
656     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return &tsegArr[(o+2)*4*2];
657     case DM_POLYTOPE_TETRAHEDRON:        return &tetArr[(o+12)*4*2];
658     case DM_POLYTOPE_HEXAHEDRON:         return &hexArr[(o+24)*6*2];
659     case DM_POLYTOPE_TRI_PRISM:          return &tripArr[(o+6)*5*2];
660     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return &ttriArr[(o+6)*5*2];
661     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return &tquadArr[(o+8)*6*2];
662     case DM_POLYTOPE_PYRAMID:            return &pyrArr[(o+4)*5*2];
663     default: return NULL;
664   }
665 }
666 
667 /* A vertex arrangment is a vertex order */
668 static inline const PetscInt *DMPolytopeTypeGetVertexArrangment(DMPolytopeType ct, PetscInt o)
669 {
670   static const PetscInt pntVerts[1]    = {0};
671   static const PetscInt segVerts[2*2]  = {
672     1, 0,
673     0, 1};
674   static const PetscInt triVerts[6*3]  = {
675     1, 0, 2,
676     0, 2, 1,
677     2, 1, 0,
678     0, 1, 2,
679     1, 2, 0,
680     2, 0, 1};
681   static const PetscInt quadVerts[8*4]  = {
682     2, 1, 0, 3,
683     1, 0, 3, 2,
684     0, 3, 2, 1,
685     3, 2, 1, 0,
686     0, 1, 2, 3,
687     1, 2, 3, 0,
688     2, 3, 0, 1,
689     3, 0, 1, 2};
690   static const PetscInt tsegVerts[4*4]  = {
691     3, 2, 1, 0,
692     1, 0, 3, 2,
693     0, 1, 2, 3,
694     2, 3, 0, 1};
695   static const PetscInt tetVerts[24*4] = {
696     2, 3, 1, 0, /* -12: (1324)   p22 */
697     3, 1, 2, 0, /* -11: (14)     p21 */
698     1, 2, 3, 0, /* -10: (1234)   p18 */
699     3, 2, 0, 1, /*  -9: (1423)   p17 */
700     2, 0, 3, 1, /*  -8: (1342)   p13 */
701     0, 3, 2, 1, /*  -7: (24)     p14 */
702     0, 1, 3, 2, /*  -6: (34)     p6  */
703     1, 3, 0, 2, /*  -5: (1243)   p10 */
704     3, 0, 1, 2, /*  -4: (1432    p9  */
705     1, 0, 2, 3, /*  -3: (12)     p1  */
706     0, 2, 1, 3, /*  -2: (23)     p2  */
707     2, 1, 0, 3, /*  -1: (13)     p5  */
708     0, 1, 2, 3, /*   0: ()       p0  */
709     1, 2, 0, 3, /*   1: (123)    p4  */
710     2, 0, 1, 3, /*   2: (132)    p3  */
711     1, 0, 3, 2, /*   3: (12)(34) p7  */
712     0, 3, 1, 2, /*   4: (243)    p8  */
713     3, 1, 0, 2, /*   5: (143)    p11 */
714     2, 3, 0, 1, /*   6: (13)(24) p16 */
715     3, 0, 2, 1, /*   7: (142)    p15 */
716     0, 2, 3, 1, /*   8: (234)    p12 */
717     3, 2, 1, 0, /*   9: (14)(23) p23 */
718     2, 1, 3, 0, /*  10: (134)    p19 */
719     1, 3, 2, 0  /*  11: (124)    p20 */};
720   static const PetscInt hexVerts[48*8] = {
721     3,  0,  4,  5,  2,  6,  7,  1, /* -24: reflected 23 */
722     3,  5,  6,  2,  0,  1,  7,  4, /* -23: reflected 22 */
723     4,  0,  1,  7,  5,  6,  2,  3, /* -22: reflected 21 */
724     6,  7,  1,  2,  5,  3,  0,  4, /* -21: reflected 20 */
725     1,  2,  6,  7,  0,  4,  5,  3, /* -20: reflected 19 */
726     6,  2,  3,  5,  7,  4,  0,  1, /* -19: reflected 18 */
727     4,  5,  3,  0,  7,  1,  2,  6, /* -18: reflected 17 */
728     1,  7,  4,  0,  2,  3,  5,  6, /* -17: reflected 16 */
729     2,  3,  5,  6,  1,  7,  4,  0, /* -16: reflected 15 */
730     7,  4,  0,  1,  6,  2,  3,  5, /* -15: reflected 14 */
731     7,  1,  2,  6,  4,  5,  3,  0, /* -14: reflected 13 */
732     0,  4,  5,  3,  1,  2,  6,  7, /* -13: reflected 12 */
733     5,  4,  7,  6,  3,  2,  1,  0, /* -12: reflected 11 */
734     7,  6,  5,  4,  1,  0,  3,  2, /* -11: reflected 10 */
735     0,  1,  7,  4,  3,  5,  6,  2, /* -10: reflected  9 */
736     4,  7,  6,  5,  0,  3,  2,  1, /*  -9: reflected  8 */
737     5,  6,  2,  3,  4,  0,  1,  7, /*  -8: reflected  7 */
738     2,  6,  7,  1,  3,  0,  4,  5, /*  -7: reflected  6 */
739     6,  5,  4,  7,  2,  1,  0,  3, /*  -6: reflected  5 */
740     5,  3,  0,  4,  6,  7,  1,  2, /*  -5: reflected  4 */
741     2,  1,  0,  3,  6,  5,  4,  7, /*  -4: reflected  3 */
742     1,  0,  3,  2,  7,  6,  5,  4, /*  -3: reflected  2 */
743     0,  3,  2,  1,  4,  7,  6,  5, /*  -2: reflected  1 */
744     3,  2,  1,  0,  5,  4,  7,  6, /*  -1: reflected  0 */
745     0,  1,  2,  3,  4,  5,  6,  7, /*   0: identity */
746     1,  2,  3,  0,  7,  4,  5,  6, /*   1: 90  rotation about z */
747     2,  3,  0,  1,  6,  7,  4,  5, /*   2: 180 rotation about z */
748     3,  0,  1,  2,  5,  6,  7,  4, /*   3: 270 rotation about z */
749     4,  0,  3,  5,  7,  6,  2,  1, /*   4: 90  rotation about x */
750     7,  4,  5,  6,  1,  2,  3,  0, /*   5: 180 rotation about x */
751     1,  7,  6,  2,  0,  3,  5,  4, /*   6: 270 rotation about x */
752     3,  2,  6,  5,  0,  4,  7,  1, /*   7: 90  rotation about y */
753     5,  6,  7,  4,  3,  0,  1,  2, /*   8: 180 rotation about y */
754     4,  7,  1,  0,  5,  3,  2,  6, /*   9: 270 rotation about y */
755     4,  5,  6,  7,  0,  1,  2,  3, /*  10: 180 rotation about x+y */
756     6,  7,  4,  5,  2,  3,  0,  1, /*  11: 180 rotation about x-y */
757     3,  5,  4,  0,  2,  1,  7,  6, /*  12: 180 rotation about y+z */
758     6,  2,  1,  7,  5,  4,  0,  3, /*  13: 180 rotation about y-z */
759     1,  0,  4,  7,  2,  6,  5,  3, /*  14: 180 rotation about z+x */
760     6,  5,  3,  2,  7,  1,  0,  4, /*  15: 180 rotation about z-x */
761     0,  4,  7,  1,  3,  2,  6,  5, /*  16: 120 rotation about x+y+z (v0v6) */
762     0,  3,  5,  4,  1,  7,  6,  2, /*  17: 240 rotation about x+y+z (v0v6) */
763     5,  3,  2,  6,  4,  7,  1,  0, /*  18: 120 rotation about x+y-z (v4v2) */
764     7,  6,  2,  1,  4,  0,  3,  5, /*  19: 240 rotation about x+y-z (v4v2) */
765     2,  1,  7,  6,  3,  5,  4,  0, /*  20: 120 rotation about x-y+z (v1v5) */
766     7,  1,  0,  4,  6,  5,  3,  2, /*  21: 240 rotation about x-y+z (v1v5) */
767     2,  6,  5,  3,  1,  0,  4,  7, /*  22: 120 rotation about x-y-z (v7v3) */
768     5,  4,  0,  3,  6,  2,  1,  7, /*  23: 240 rotation about x-y-z (v7v3) */
769   };
770   static const PetscInt tripVerts[12*6] = {
771     4,  3,  5,  2,  1,  0, /* -6: reflect bottom and top */
772     5,  4,  3,  1,  0,  2, /* -5: reflect bottom and top */
773     3,  5,  4,  0,  2,  1, /* -4: reflect bottom and top */
774     1,  0,  2,  5,  4,  3, /* -3: reflect bottom and top */
775     0,  2,  1,  3,  5,  4, /* -2: reflect bottom and top */
776     2,  1,  0,  4,  3,  5, /* -1: reflect bottom and top */
777     0,  1,  2,  3,  4,  5, /*  0: identity */
778     1,  2,  0,  5,  3,  4, /*  1: 120 rotation about z */
779     2,  0,  1,  4,  5,  3, /*  2: 240 rotation about z */
780     4,  5,  3,  2,  0,  1, /*  3: 180 rotation about y of 0 */
781     3,  4,  5,  0,  1,  2, /*  4: 180 rotation about y of 1 */
782     5,  3,  4,  1,  2,  0, /*  5: 180 rotation about y of 2 */
783   };
784   static const PetscInt ttriVerts[12*6] = {
785     4,  3,  5,  1,  0,  2, /* -6: r b a^2 */
786     3,  5,  4,  0,  2,  1, /* -5: r b a */
787     5,  4,  3,  2,  1,  0, /* -4: r b */
788     1,  0,  2,  4,  3,  5, /* -3: r a^2 */
789     0,  2,  1,  3,  5,  4, /* -2: r a */
790     2,  1,  0,  5,  4,  3, /* -1: r */
791     0,  1,  2,  3,  4,  5, /*  0: identity */
792     1,  2,  0,  4,  5,  3, /*  1: a */
793     2,  0,  1,  5,  3,  4, /*  2: a^2 */
794     3,  4,  5,  0,  1,  2, /*  3: b */
795     4,  5,  3,  1,  2,  0, /*  4: b a */
796     5,  3,  4,  2,  0,  1, /*  5: b a^2 */
797   };
798   /* a: rotate 90 about z
799      b: swap top and bottom segments
800      r: reflect */
801   static const PetscInt tquadVerts[16*8] = {
802     6,  5,  4,  7,  2,  1,  0,  3, /* -8: r b a^3 */
803     5,  4,  7,  6,  1,  0,  3,  2, /* -7: r b a^2 */
804     4,  7,  6,  5,  0,  3,  2,  1, /* -6: r b a */
805     7,  6,  5,  4,  3,  2,  1,  0, /* -5: r b */
806     2,  1,  0,  3,  6,  5,  4,  7, /* -4: r a^3 */
807     1,  0,  3,  2,  5,  4,  7,  6, /* -3: r a^2 */
808     0,  3,  2,  1,  4,  7,  6,  5, /* -2: r a */
809     3,  2,  1,  0,  7,  6,  5,  4, /* -1: r */
810     0,  1,  2,  3,  4,  5,  6,  7, /*  0: identity */
811     1,  2,  3,  0,  5,  6,  7,  4, /*  1: a */
812     2,  3,  0,  1,  6,  7,  4,  5, /*  2: a^2 */
813     3,  0,  1,  2,  7,  4,  5,  6, /*  3: a^3 */
814     4,  5,  6,  7,  0,  1,  2,  3, /*  4: b */
815     5,  6,  7,  4,  1,  2,  3,  0, /*  5: b a */
816     6,  7,  4,  5,  2,  3,  0,  1, /*  6: b a^2 */
817     7,  4,  5,  6,  3,  0,  1,  2, /*  7: b a^3 */
818   };
819   static const PetscInt pyrVerts[8*5] = {
820     2,  1,  0,  3,  4, /* -4: Reflect bottom face */
821     1,  0,  3,  2,  4, /* -3: Reflect bottom face */
822     0,  3,  2,  1,  4, /* -2: Reflect bottom face */
823     3,  2,  1,  0,  4, /* -1: Reflect bottom face */
824     0,  1,  2,  3,  4, /*  0: identity */
825     1,  2,  3,  0,  4, /*  1:  90 rotation about z */
826     2,  3,  0,  1,  4, /*  2: 180 rotation about z */
827     3,  0,  1,  2,  4, /*  3: 270 rotation about z */
828   };
829   switch (ct) {
830     case DM_POLYTOPE_POINT:              return pntVerts;
831     case DM_POLYTOPE_SEGMENT:            return &segVerts[(o+1)*2];
832     case DM_POLYTOPE_POINT_PRISM_TENSOR: return &segVerts[(o+1)*2];
833     case DM_POLYTOPE_TRIANGLE:           return &triVerts[(o+3)*3];
834     case DM_POLYTOPE_QUADRILATERAL:      return &quadVerts[(o+4)*4];
835     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return &tsegVerts[(o+2)*4];
836     case DM_POLYTOPE_TETRAHEDRON:        return &tetVerts[(o+12)*4];
837     case DM_POLYTOPE_HEXAHEDRON:         return &hexVerts[(o+24)*8];
838     case DM_POLYTOPE_TRI_PRISM:          return &tripVerts[(o+6)*6];
839     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return &ttriVerts[(o+6)*6];
840     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return &tquadVerts[(o+8)*8];
841     case DM_POLYTOPE_PYRAMID:            return &pyrVerts[(o+4)*5];
842     default: return NULL;
843   }
844 }
845 
846 /* This is orientation o1 acting on orientation o2 */
847 static inline PetscInt DMPolytopeTypeComposeOrientation(DMPolytopeType ct, PetscInt o1, PetscInt o2)
848 {
849   static const PetscInt segMult[2*2] = {
850      0, -1,
851     -1,  0};
852   static const PetscInt triMult[6*6] = {
853      0,  2,  1, -3, -1, -2,
854      1,  0,  2, -2, -3, -1,
855      2,  1,  0, -1, -2, -3,
856     -3, -2, -1,  0,  1,  2,
857     -2, -1, -3,  1,  2,  0,
858     -1, -3, -2,  2,  0,  1};
859   static const PetscInt quadMult[8*8] = {
860      0,  3,  2,  1, -4, -1, -2, -3,
861      1,  0,  3,  2, -3, -4, -1, -2,
862      2,  1,  0,  3, -2, -3, -4, -1,
863      3,  2,  1,  0, -1, -2, -3, -4,
864     -4, -3, -2, -1,  0,  1,  2,  3,
865     -3, -2, -1, -4,  1,  2,  3,  0,
866     -2, -1, -4, -3,  2,  3,  0,  1,
867     -1, -4, -3, -2,  3,  0,  1,  2};
868   static const PetscInt tsegMult[4*4] = {
869      0,  1, -2, -1,
870      1,  0, -1, -2,
871     -2, -1,  0,  1,
872     -1, -2,  1,  0};
873   static const PetscInt tetMult[24*24] = {
874     3, 2, 7, 0, 5, 10, 9, 8, 1, 6, 11, 4, -12, -7, -5, -9, -10, -2, -6, -1, -11, -3, -4, -8,
875     4, 0, 8, 1, 3, 11, 10, 6, 2, 7, 9, 5, -11, -9, -4, -8, -12, -1, -5, -3, -10, -2, -6, -7,
876     5, 1, 6, 2, 4, 9, 11, 7, 0, 8, 10, 3, -10, -8, -6, -7, -11, -3, -4, -2, -12, -1, -5, -9,
877     0, 8, 4, 3, 11, 1, 6, 2, 10, 9, 5, 7, -9, -4, -11, -12, -1, -8, -3, -10, -5, -6, -7, -2,
878     1, 6, 5, 4, 9, 2, 7, 0, 11, 10, 3, 8, -8, -6, -10, -11, -3, -7, -2, -12, -4, -5, -9, -1,
879     2, 7, 3, 5, 10, 0, 8, 1, 9, 11, 4, 6, -7, -5, -12, -10, -2, -9, -1, -11, -6, -4, -8, -3,
880     6, 5, 1, 9, 2, 4, 0, 11, 7, 3, 8, 10, -6, -10, -8, -3, -7, -11, -12, -4, -2, -9, -1, -5,
881     7, 3, 2, 10, 0, 5, 1, 9, 8, 4, 6, 11, -5, -12, -7, -2, -9, -10, -11, -6, -1, -8, -3, -4,
882     8, 4, 0, 11, 1, 3, 2, 10, 6, 5, 7, 9, -4, -11, -9, -1, -8, -12, -10, -5, -3, -7, -2, -6,
883     9, 11, 10, 6, 8, 7, 3, 5, 4, 0, 2, 1, -3, -1, -2, -6, -4, -5, -9, -7, -8, -12, -10, -11,
884     10, 9, 11, 7, 6, 8, 4, 3, 5, 1, 0, 2, -2, -3, -1, -5, -6, -4, -8, -9, -7, -11, -12, -10,
885     11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12,
886     -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
887     -11, -10, -12, -8, -7, -9, -5, -4, -6, -2, -1, -3, 1, 2, 0, 4, 5, 3, 7, 8, 6, 10, 11, 9,
888     -10, -12, -11, -7, -9, -8, -4, -6, -5, -1, -3, -2, 2, 0, 1, 5, 3, 4, 8, 6, 7, 11, 9, 10,
889     -9, -5, -1, -12, -2, -4, -3, -11, -7, -6, -8, -10, 3, 10, 8, 0, 7, 11, 9, 4, 2, 6, 1, 5,
890     -8, -4, -3, -11, -1, -6, -2, -10, -9, -5, -7, -12, 4, 11, 6, 1, 8, 9, 10, 5, 0, 7, 2, 3,
891     -7, -6, -2, -10, -3, -5, -1, -12, -8, -4, -9, -11, 5, 9, 7, 2, 6, 10, 11, 3, 1, 8, 0, 4,
892     -3, -8, -4, -6, -11, -1, -9, -2, -10, -12, -5, -7, 6, 4, 11, 9, 1, 8, 0, 10, 5, 3, 7, 2,
893     -2, -7, -6, -5, -10, -3, -8, -1, -12, -11, -4, -9, 7, 5, 9, 10, 2, 6, 1, 11, 3, 4, 8, 0,
894     -1, -9, -5, -4, -12, -2, -7, -3, -11, -10, -6, -8, 8, 3, 10, 11, 0, 7, 2, 9, 4, 5, 6, 1,
895     -6, -2, -7, -3, -5, -10, -12, -8, -1, -9, -11, -4, 9, 7, 5, 6, 10, 2, 3, 1, 11, 0, 4, 8,
896     -5, -1, -9, -2, -4, -12, -11, -7, -3, -8, -10, -6, 10, 8, 3, 7, 11, 0, 4, 2, 9, 1, 5, 6,
897     -4, -3, -8, -1, -6, -11, -10, -9, -2, -7, -12, -5, 11, 6, 4, 8, 9, 1, 5, 0, 10, 2, 3, 7,
898     };
899   static const PetscInt hexMult[48*48] = {
900     18, 2, 5, 22, 21, 8, 16, 0, 13, 6, 11, 3, 15, 9, 4, 23, 12, 1, 19, 10, 7, 20, 14, 17, -24, -10, -20, -16, -12, -21, -4, -5, -18, -13, -15, -8, -2, -11, -14, -7, -3, -22, -6, -17, -19, -9, -1, -23,
901     8, 20, 19, 2, 5, 23, 0, 17, 11, 1, 15, 7, 13, 4, 10, 18, 3, 14, 21, 9, 12, 22, 6, 16, -23, -13, -17, -7, -8, -19, -16, -12, -22, -2, -14, -5, -10, -15, -11, -4, -20, -9, -21, -3, -6, -18, -24, -1,
902     2, 17, 23, 8, 0, 19, 5, 20, 1, 11, 9, 14, 12, 6, 3, 16, 10, 7, 22, 15, 13, 21, 4, 18, -22, -14, -19, -5, -15, -17, -10, -2, -23, -12, -13, -7, -16, -8, -4, -11, -24, -3, -18, -9, -1, -21, -20, -6,
903     21, 5, 2, 16, 18, 0, 22, 8, 4, 12, 3, 11, 14, 7, 13, 20, 6, 10, 17, 1, 9, 23, 15, 19, -21, -8, -18, -15, -4, -24, -12, -14, -20, -7, -16, -10, -11, -2, -5, -13, -6, -19, -3, -23, -22, -1, -9, -17,
904     16, 8, 0, 21, 22, 2, 18, 5, 12, 4, 1, 10, 9, 15, 6, 19, 13, 11, 23, 3, 14, 17, 7, 20, -20, -16, -24, -10, -2, -18, -11, -7, -21, -14, -8, -15, -12, -4, -13, -5, -9, -23, -1, -19, -17, -3, -6, -22,
905     5, 19, 20, 0, 8, 17, 2, 23, 10, 3, 7, 15, 6, 12, 11, 22, 1, 9, 16, 14, 4, 18, 13, 21, -19, -5, -22, -14, -16, -23, -8, -11, -17, -4, -7, -13, -15, -10, -12, -2, -21, -6, -20, -1, -9, -24, -18, -3,
906     22, 0, 8, 18, 16, 5, 21, 2, 6, 13, 10, 1, 7, 14, 12, 17, 4, 3, 20, 11, 15, 19, 9, 23, -18, -15, -21, -8, -11, -20, -2, -13, -24, -5, -10, -16, -4, -12, -7, -14, -1, -17, -9, -22, -23, -6, -3, -19,
907     0, 23, 17, 5, 2, 20, 8, 19, 3, 10, 14, 9, 4, 13, 1, 21, 11, 15, 18, 7, 6, 16, 12, 22, -17, -7, -23, -13, -10, -22, -15, -4, -19, -11, -5, -14, -8, -16, -2, -12, -18, -1, -24, -6, -3, -20, -21, -9,
908     10, 13, 6, 1, 11, 12, 3, 4, 8, 0, 22, 18, 19, 23, 5, 15, 2, 21, 9, 16, 17, 7, 20, 14, -16, -24, -10, -20, -23, -8, -19, -6, -15, -3, -21, -18, -22, -17, -9, -1, -14, -12, -7, -4, -11, -13, -5, -2,
909     1, 4, 12, 10, 3, 6, 11, 13, 0, 8, 16, 21, 17, 20, 2, 14, 5, 18, 7, 22, 19, 9, 23, 15, -15, -21, -8, -18, -17, -10, -22, -3, -16, -6, -24, -20, -19, -23, -1, -9, -5, -4, -13, -12, -2, -7, -14, -11,
910     14, 10, 3, 9, 7, 1, 15, 11, 17, 23, 0, 5, 16, 22, 20, 6, 19, 8, 12, 2, 21, 4, 18, 13, -14, -19, -5, -22, -3, -13, -9, -20, -7, -21, -23, -17, -6, -1, -24, -18, -12, -16, -2, -8, -10, -4, -11, -15,
911     7, 3, 10, 15, 14, 11, 9, 1, 20, 19, 5, 0, 18, 21, 17, 4, 23, 2, 13, 8, 22, 6, 16, 12, -13, -17, -7, -23, -9, -14, -3, -24, -5, -18, -22, -19, -1, -6, -20, -21, -2, -10, -12, -15, -16, -11, -4, -8,
912     13, 14, 15, 12, 4, 9, 6, 7, 21, 22, 23, 20, 2, 0, 18, 3, 16, 17, 1, 19, 8, 11, 5, 10, -12, -9, -11, -6, -21, -4, -24, -22, -2, -23, -3, -1, -20, -18, -19, -17, -16, -14, -15, -13, -5, -8, -10, -7,
913     6, 9, 7, 4, 12, 14, 13, 15, 16, 18, 17, 19, 0, 2, 22, 1, 21, 23, 3, 20, 5, 10, 8, 11, -11, -6, -12, -9, -20, -2, -18, -17, -4, -19, -1, -3, -21, -24, -23, -22, -8, -7, -10, -5, -13, -16, -15, -14,
914     3, 12, 4, 11, 1, 13, 10, 6, 2, 5, 21, 16, 23, 19, 0, 9, 8, 22, 15, 18, 20, 14, 17, 7, -10, -20, -16, -24, -22, -15, -17, -1, -8, -9, -18, -21, -23, -19, -3, -6, -13, -2, -5, -11, -4, -14, -7, -12,
915     20, 16, 18, 23, 17, 21, 19, 22, 14, 15, 4, 6, 3, 1, 7, 0, 9, 12, 2, 13, 11, 5, 10, 8, -9, -11, -6, -12, -14, -3, -13, -10, -1, -8, -2, -4, -7, -5, -16, -15, -23, -20, -22, -18, -24, -19, -17, -21,
916     11, 6, 13, 3, 10, 4, 1, 12, 5, 2, 18, 22, 20, 17, 8, 7, 0, 16, 14, 21, 23, 15, 19, 9, -8, -18, -15, -21, -19, -16, -23, -9, -10, -1, -20, -24, -17, -22, -6, -3, -7, -11, -14, -2, -12, -5, -13, -4,
917     9, 11, 1, 14, 15, 3, 7, 10, 23, 17, 2, 8, 21, 18, 19, 13, 20, 5, 4, 0, 16, 12, 22, 6, -7, -23, -13, -17, -1, -5, -6, -21, -14, -20, -19, -22, -9, -3, -18, -24, -11, -8, -4, -16, -15, -2, -12, -10,
918     19, 21, 22, 17, 23, 16, 20, 18, 9, 7, 12, 13, 1, 3, 15, 2, 14, 4, 0, 6, 10, 8, 11, 5, -6, -12, -9, -11, -7, -1, -5, -15, -3, -16, -4, -2, -14, -13, -8, -10, -19, -21, -17, -24, -18, -23, -22, -20,
919     15, 1, 11, 7, 9, 10, 14, 3, 19, 20, 8, 2, 22, 16, 23, 12, 17, 0, 6, 5, 18, 13, 21, 4, -5, -22, -14, -19, -6, -7, -1, -18, -13, -24, -17, -23, -3, -9, -21, -20, -4, -15, -11, -10, -8, -12, -2, -16,
920     4, 15, 14, 6, 13, 7, 12, 9, 18, 16, 20, 23, 5, 8, 21, 11, 22, 19, 10, 17, 0, 3, 2, 1, -4, -1, -2, -3, -24, -12, -21, -19, -11, -17, -6, -9, -18, -20, -22, -23, -15, -5, -16, -7, -14, -10, -8, -13,
921     17, 18, 16, 19, 20, 22, 23, 21, 7, 9, 6, 4, 10, 11, 14, 5, 15, 13, 8, 12, 1, 0, 3, 2, -3, -4, -1, -2, -13, -9, -14, -16, -6, -15, -12, -11, -5, -7, -10, -8, -22, -24, -23, -21, -20, -17, -19, -18,
922     12, 7, 9, 13, 6, 15, 4, 14, 22, 21, 19, 17, 8, 5, 16, 10, 18, 20, 11, 23, 2, 1, 0, 3, -2, -3, -4, -1, -18, -11, -20, -23, -12, -22, -9, -6, -24, -21, -17, -19, -10, -13, -8, -14, -7, -15, -16, -5,
923     23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23, -24,
924     -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
925     -13, -8, -10, -14, -7, -16, -5, -15, -23, -22, -20, -18, -9, -6, -17, -11, -19, -21, -12, -24, -3, -2, -1, -4, 1, 2, 3, 0, 17, 10, 19, 22, 11, 21, 8, 5, 23, 20, 16, 18, 9, 12, 7, 13, 6, 14, 15, 4,
926     -18, -19, -17, -20, -21, -23, -24, -22, -8, -10, -7, -5, -11, -12, -15, -6, -16, -14, -9, -13, -2, -1, -4, -3, 2, 3, 0, 1, 12, 8, 13, 15, 5, 14, 11, 10, 4, 6, 9, 7, 21, 23, 22, 20, 19, 16, 18, 17,
927     -5, -16, -15, -7, -14, -8, -13, -10, -19, -17, -21, -24, -6, -9, -22, -12, -23, -20, -11, -18, -1, -4, -3, -2, 3, 0, 1, 2, 23, 11, 20, 18, 10, 16, 5, 8, 17, 19, 21, 22, 14, 4, 15, 6, 13, 9, 7, 12,
928     -16, -2, -12, -8, -10, -11, -15, -4, -20, -21, -9, -3, -23, -17, -24, -13, -18, -1, -7, -6, -19, -14, -22, -5, 4, 21, 13, 18, 5, 6, 0, 17, 12, 23, 16, 22, 2, 8, 20, 19, 3, 14, 10, 9, 7, 11, 1, 15,
929     -20, -22, -23, -18, -24, -17, -21, -19, -10, -8, -13, -14, -2, -4, -16, -3, -15, -5, -1, -7, -11, -9, -12, -6, 5, 11, 8, 10, 6, 0, 4, 14, 2, 15, 3, 1, 13, 12, 7, 9, 18, 20, 16, 23, 17, 22, 21, 19,
930     -10, -12, -2, -15, -16, -4, -8, -11, -24, -18, -3, -9, -22, -19, -20, -14, -21, -6, -5, -1, -17, -13, -23, -7, 6, 22, 12, 16, 0, 4, 5, 20, 13, 19, 18, 21, 8, 2, 17, 23, 10, 7, 3, 15, 14, 1, 11, 9,
931     -12, -7, -14, -4, -11, -5, -2, -13, -6, -3, -19, -23, -21, -18, -9, -8, -1, -17, -15, -22, -24, -16, -20, -10, 7, 17, 14, 20, 18, 15, 22, 8, 9, 0, 19, 23, 16, 21, 5, 2, 6, 10, 13, 1, 11, 4, 12, 3,
932     -21, -17, -19, -24, -18, -22, -20, -23, -15, -16, -5, -7, -4, -2, -8, -1, -10, -13, -3, -14, -12, -6, -11, -9, 8, 10, 5, 11, 13, 2, 12, 9, 0, 7, 1, 3, 6, 4, 15, 14, 22, 19, 21, 17, 23, 18, 16, 20,
933     -4, -13, -5, -12, -2, -14, -11, -7, -3, -6, -22, -17, -24, -20, -1, -10, -9, -23, -16, -19, -21, -15, -18, -8, 9, 19, 15, 23, 21, 14, 16, 0, 7, 8, 17, 20, 22, 18, 2, 5, 12, 1, 4, 10, 3, 13, 6, 11,
934     -7, -10, -8, -5, -13, -15, -14, -16, -17, -19, -18, -20, -1, -3, -23, -2, -22, -24, -4, -21, -6, -11, -9, -12, 10, 5, 11, 8, 19, 1, 17, 16, 3, 18, 0, 2, 20, 23, 22, 21, 7, 6, 9, 4, 12, 15, 14, 13,
935     -14, -15, -16, -13, -5, -10, -7, -8, -22, -23, -24, -21, -3, -1, -19, -4, -17, -18, -2, -20, -9, -12, -6, -11, 11, 8, 10, 5, 20, 3, 23, 21, 1, 22, 2, 0, 19, 17, 18, 16, 15, 13, 14, 12, 4, 7, 9, 6,
936     -8, -4, -11, -16, -15, -12, -10, -2, -21, -20, -6, -1, -19, -22, -18, -5, -24, -3, -14, -9, -23, -7, -17, -13, 12, 16, 6, 22, 8, 13, 2, 23, 4, 17, 21, 18, 0, 5, 19, 20, 1, 9, 11, 14, 15, 10, 3, 7,
937     -15, -11, -4, -10, -8, -2, -16, -12, -18, -24, -1, -6, -17, -23, -21, -7, -20, -9, -13, -3, -22, -5, -19, -14, 13, 18, 4, 21, 2, 12, 8, 19, 6, 20, 22, 16, 5, 0, 23, 17, 11, 15, 1, 7, 9, 3, 10, 14,
938     -2, -5, -13, -11, -4, -7, -12, -14, -1, -9, -17, -22, -18, -21, -3, -15, -6, -19, -8, -23, -20, -10, -24, -16, 14, 20, 7, 17, 16, 9, 21, 2, 15, 5, 23, 19, 18, 22, 0, 8, 4, 3, 12, 11, 1, 6, 13, 10,
939     -11, -14, -7, -2, -12, -13, -4, -5, -9, -1, -23, -19, -20, -24, -6, -16, -3, -22, -10, -17, -18, -8, -21, -15, 15, 23, 9, 19, 22, 7, 18, 5, 14, 2, 20, 17, 21, 16, 8, 0, 13, 11, 6, 3, 10, 12, 4, 1,
940     -1, -24, -18, -6, -3, -21, -9, -20, -4, -11, -15, -10, -5, -14, -2, -22, -12, -16, -19, -8, -7, -17, -13, -23, 16, 6, 22, 12, 9, 21, 14, 3, 18, 10, 4, 13, 7, 15, 1, 11, 17, 0, 23, 5, 2, 19, 20, 8,
941     -23, -1, -9, -19, -17, -6, -22, -3, -7, -14, -11, -2, -8, -15, -13, -18, -5, -4, -21, -12, -16, -20, -10, -24, 17, 14, 20, 7, 10, 19, 1, 12, 23, 4, 9, 15, 3, 11, 6, 13, 0, 16, 8, 21, 22, 5, 2, 18,
942     -6, -20, -21, -1, -9, -18, -3, -24, -11, -4, -8, -16, -7, -13, -12, -23, -2, -10, -17, -15, -5, -19, -14, -22, 18, 4, 21, 13, 15, 22, 7, 10, 16, 3, 6, 12, 14, 9, 11, 1, 20, 5, 19, 0, 8, 23, 17, 2,
943     -17, -9, -1, -22, -23, -3, -19, -6, -13, -5, -2, -11, -10, -16, -7, -20, -14, -12, -24, -4, -15, -18, -8, -21, 19, 15, 23, 9, 1, 17, 10, 6, 20, 13, 7, 14, 11, 3, 12, 4, 8, 22, 0, 18, 16, 2, 5, 21,
944     -22, -6, -3, -17, -19, -1, -23, -9, -5, -13, -4, -12, -15, -8, -14, -21, -7, -11, -18, -2, -10, -24, -16, -20, 20, 7, 17, 14, 3, 23, 11, 13, 19, 6, 15, 9, 10, 1, 4, 12, 5, 18, 2, 22, 21, 0, 8, 16,
945     -3, -18, -24, -9, -1, -20, -6, -21, -2, -12, -10, -15, -13, -7, -4, -17, -11, -8, -23, -16, -14, -22, -5, -19, 21, 13, 18, 4, 14, 16, 9, 1, 22, 11, 12, 6, 15, 7, 3, 10, 23, 2, 17, 8, 0, 20, 19, 5,
946     -9, -21, -20, -3, -6, -24, -1, -18, -12, -2, -16, -8, -14, -5, -11, -19, -4, -15, -22, -10, -13, -23, -7, -17, 22, 12, 16, 6, 7, 18, 15, 11, 21, 1, 13, 4, 9, 14, 10, 3, 19, 8, 20, 2, 5, 17, 23, 0,
947     -19, -3, -6, -23, -22, -9, -17, -1, -14, -7, -12, -4, -16, -10, -5, -24, -13, -2, -20, -11, -8, -21, -15, -18, 23, 9, 19, 15, 11, 20, 3, 4, 17, 12, 14, 7, 1, 10, 13, 6, 2, 21, 5, 16, 18, 8, 0, 22,
948     };
949   static const PetscInt tripMult[12*12] = {
950     1, 0, 2, 3, 5, 4, -6, -4, -5, -2, -3, -1,
951     0, 2, 1, 4, 3, 5, -5, -6, -4, -3, -1, -2,
952     2, 1, 0, 5, 4, 3, -4, -5, -6, -1, -2, -3,
953     4, 3, 5, 0, 2, 1, -3, -1, -2, -5, -6, -4,
954     3, 5, 4, 1, 0, 2, -2, -3, -1, -6, -4, -5,
955     5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6,
956     -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5,
957     -4, -6, -5, -2, -1, -3, 1, 2, 0, 5, 3, 4,
958     -5, -4, -6, -1, -3, -2, 2, 0, 1, 4, 5, 3,
959     -3, -2, -1, -6, -5, -4, 3, 4, 5, 0, 1, 2,
960     -1, -3, -2, -5, -4, -6, 4, 5, 3, 2, 0, 1,
961     -2, -1, -3, -4, -6, -5, 5, 3, 4, 1, 2, 0,
962   };
963   static const PetscInt ttriMult[12*12] = {
964     0, 2, 1, 3, 5, 4, -6, -4, -5, -3, -1, -2,
965     1, 0, 2, 4, 3, 5, -5, -6, -4, -2, -3, -1,
966     2, 1, 0, 5, 4, 3, -4, -5, -6, -1, -2, -3,
967     3, 5, 4, 0, 2, 1, -3, -1, -2, -6, -4, -5,
968     4, 3, 5, 1, 0, 2, -2, -3, -1, -5, -6, -4,
969     5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6,
970     -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5,
971     -5, -4, -6, -2, -1, -3, 1, 2, 0, 4, 5, 3,
972     -4, -6, -5, -1, -3, -2, 2, 0, 1, 5, 3, 4,
973     -3, -2, -1, -6, -5, -4, 3, 4, 5, 0, 1, 2,
974     -2, -1, -3, -5, -4, -6, 4, 5, 3, 1, 2, 0,
975     -1, -3, -2, -4, -6, -5, 5, 3, 4, 2, 0, 1,
976   };
977   static const PetscInt tquadMult[16*16] = {
978     0, 3, 2, 1, 4, 7, 6, 5, -8, -5, -6, -7, -4, -1, -2, -3,
979     1, 0, 3, 2, 5, 4, 7, 6, -7, -8, -5, -6, -3, -4, -1, -2,
980     2, 1, 0, 3, 6, 5, 4, 7, -6, -7, -8, -5, -2, -3, -4, -1,
981     3, 2, 1, 0, 7, 6, 5, 4, -5, -6, -7, -8, -1, -2, -3, -4,
982     4, 7, 6, 5, 0, 3, 2, 1, -4, -1, -2, -3, -8, -5, -6, -7,
983     5, 4, 7, 6, 1, 0, 3, 2, -3, -4, -1, -2, -7, -8, -5, -6,
984     6, 5, 4, 7, 2, 1, 0, 3, -2, -3, -4, -1, -6, -7, -8, -5,
985     7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4, -5, -6, -7, -8,
986     -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,
987     -7, -6, -5, -8, -3, -2, -1, -4, 1, 2, 3, 0, 5, 6, 7, 4,
988     -6, -5, -8, -7, -2, -1, -4, -3, 2, 3, 0, 1, 6, 7, 4, 5,
989     -5, -8, -7, -6, -1, -4, -3, -2, 3, 0, 1, 2, 7, 4, 5, 6,
990     -4, -3, -2, -1, -8, -7, -6, -5, 4, 5, 6, 7, 0, 1, 2, 3,
991     -3, -2, -1, -4, -7, -6, -5, -8, 5, 6, 7, 4, 1, 2, 3, 0,
992     -2, -1, -4, -3, -6, -5, -8, -7, 6, 7, 4, 5, 2, 3, 0, 1,
993     -1, -4, -3, -2, -5, -8, -7, -6, 7, 4, 5, 6, 3, 0, 1, 2,
994   };
995   static const PetscInt pyrMult[8*8] = {
996     0, 3, 2, 1, -4, -1, -2, -3,
997     1, 0, 3, 2, -3, -4, -1, -2,
998     2, 1, 0, 3, -2, -3, -4, -1,
999     3, 2, 1, 0, -1, -2, -3, -4,
1000     -4, -3, -2, -1, 0, 1, 2, 3,
1001     -3, -2, -1, -4, 1, 2, 3, 0,
1002     -2, -1, -4, -3, 2, 3, 0, 1,
1003     -1, -4, -3, -2, 3, 0, 1, 2,
1004   };
1005   switch (ct) {
1006     case DM_POLYTOPE_POINT:              return 0;
1007     case DM_POLYTOPE_SEGMENT:
1008     case DM_POLYTOPE_POINT_PRISM_TENSOR: return segMult[(o1+1)*2+o2+1];
1009     case DM_POLYTOPE_TRIANGLE:           return triMult[(o1+3)*6+o2+3];
1010     case DM_POLYTOPE_QUADRILATERAL:      return quadMult[(o1+4)*8+o2+4];
1011     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return tsegMult[(o1+2)*4+o2+2];
1012     case DM_POLYTOPE_TETRAHEDRON:        return tetMult[(o1+12)*24+o2+12];
1013     case DM_POLYTOPE_HEXAHEDRON:         return hexMult[(o1+24)*48+o2+24];
1014     case DM_POLYTOPE_TRI_PRISM:          return tripMult[(o1+6)*12+o2+6];
1015     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return ttriMult[(o1+6)*12+o2+6];
1016     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return tquadMult[(o1+8)*16+o2+8];
1017     case DM_POLYTOPE_PYRAMID:            return pyrMult[(o1+4)*8+o2+4];
1018     default: return 0;
1019   }
1020 }
1021 
1022 /* This is orientation o1 acting on orientation o2^{-1} */
1023 static inline PetscInt DMPolytopeTypeComposeOrientationInv(DMPolytopeType ct, PetscInt o1, PetscInt o2)
1024 {
1025   static const PetscInt triInv[6]    = {-3, -2, -1, 0, 2, 1};
1026   static const PetscInt quadInv[8]   = {-4, -3, -2, -1, 0, 3, 2, 1};
1027   static const PetscInt tetInv[24]   = {-9, -11, -4, -12, -5, -7, -6, -8, -10, -3, -2, -1, 0, 2, 1, 3, 8, 10, 6, 11, 4, 9, 5, 7};
1028   static const PetscInt hexInv[48]   = {-17, -18, -20, -19, -22, -21, -23, -24, -15, -16, -14, -13, -11, -12, -10, -9, -8, -5, -6, -7, -4, -3, -2, -1,
1029                                           0,   3,   2,   1,   6,   5,   4,   9,   8,   7,  10,  11,  12,  13,  14, 15, 17, 16, 19, 18, 21, 20, 23, 22};
1030   static const PetscInt tripInv[12]  = {-5, -6, -4, -3, -2, -1, 0, 2, 1, 3, 4, 5};
1031   static const PetscInt ttriInv[12]  = {-6, -5, -4, -3, -2, -1, 0, 2, 1, 3, 5, 4};
1032   static const PetscInt tquadInv[16] = {-8, -7, -6, -5, -4, -3, -2, -1, 0, 3, 2, 1, 4, 7, 6, 5};
1033   static const PetscInt pyrInv[8]    = {-4, -3, -2, -1, 0, 3, 2, 1};
1034   switch (ct) {
1035     case DM_POLYTOPE_POINT:              return 0;
1036     case DM_POLYTOPE_SEGMENT:
1037     case DM_POLYTOPE_POINT_PRISM_TENSOR: return DMPolytopeTypeComposeOrientation(ct, o1, o2);
1038     case DM_POLYTOPE_TRIANGLE:           return DMPolytopeTypeComposeOrientation(ct, o1, triInv[o2+3]);
1039     case DM_POLYTOPE_QUADRILATERAL:      return DMPolytopeTypeComposeOrientation(ct, o1, quadInv[o2+4]);
1040     case DM_POLYTOPE_SEG_PRISM_TENSOR:   return DMPolytopeTypeComposeOrientation(ct, o1, o2);
1041     case DM_POLYTOPE_TETRAHEDRON:        return DMPolytopeTypeComposeOrientation(ct, o1, tetInv[o2+12]);
1042     case DM_POLYTOPE_HEXAHEDRON:         return DMPolytopeTypeComposeOrientation(ct, o1, hexInv[o2+24]);
1043     case DM_POLYTOPE_TRI_PRISM:          return DMPolytopeTypeComposeOrientation(ct, o1, tripInv[o2+6]);
1044     case DM_POLYTOPE_TRI_PRISM_TENSOR:   return DMPolytopeTypeComposeOrientation(ct, o1, ttriInv[o2+6]);
1045     case DM_POLYTOPE_QUAD_PRISM_TENSOR:  return DMPolytopeTypeComposeOrientation(ct, o1, tquadInv[o2+8]);
1046     case DM_POLYTOPE_PYRAMID:            return DMPolytopeTypeComposeOrientation(ct, o1, pyrInv[o2+4]);
1047     default: return 0;
1048   }
1049 }
1050 
1051 PETSC_EXTERN PetscErrorCode DMPolytopeMatchOrientation(DMPolytopeType, const PetscInt[], const PetscInt[], PetscInt *, PetscBool *);
1052 PETSC_EXTERN PetscErrorCode DMPolytopeMatchVertexOrientation(DMPolytopeType, const PetscInt[], const PetscInt[], PetscInt *, PetscBool *);
1053 PETSC_EXTERN PetscErrorCode DMPolytopeGetOrientation(DMPolytopeType, const PetscInt[], const PetscInt[], PetscInt *);
1054 PETSC_EXTERN PetscErrorCode DMPolytopeGetVertexOrientation(DMPolytopeType, const PetscInt[], const PetscInt[], PetscInt *);
1055 PETSC_EXTERN PetscErrorCode DMPolytopeInCellTest(DMPolytopeType, const PetscReal[], PetscBool *);
1056 
1057 #endif
1058