Actual source code: meshcreate.c

  1: #ifdef PETSC_RCS_HEADER
  2: static char vcid[] = "$Id: meshcreate.c,v 1.7 2000/01/10 03:54:25 knepley Exp $";
  3: #endif

 5:  #include src/mesh/meshimpl.h

  7: /*@ 
  8:   MeshCreate - This function creates an empty mesh. The type can then be set with MeshSetType().

 10:   Collective on MPI_Comm

 12:   Input Parameter:
 13: . comm - The communicator for the mesh object

 15:   Output Parameter:
 16: . mesh - The mesh

 18:   Options Database Keys:
 19: . -mesh_reorder              - The flag to renumber the mesh nodes
 20: . -mesh_ordering_type <type> - The type of node numbering, such as tri_2d_rcm, etc.

 22:   Level: beginner

 24: .keywords: mesh, create
 25: .seealso: MeshSetType(), MeshSetUp(), MeshDestroy(), GridCreate()
 26: @*/
 27: int MeshCreate(MPI_Comm comm, Mesh *mesh)
 28: {
 29:   Mesh m;
 30:   int  ierr;

 34:   *mesh = PETSC_NULL;
 35: #ifndef PETSC_USE_DYNAMIC_LIBRARIES
 36:   MeshInitializePackage(PETSC_NULL);
 37: #endif

 39:   PetscHeaderCreate(m, _Mesh, struct _MeshOps, MESH_COOKIE, -1, "Mesh", comm, MeshDestroy, MeshView);
 40:   PetscLogObjectCreate(m);
 41:   PetscLogObjectMemory(m, sizeof(struct _Mesh));
 42:   PetscMemzero(m->ops, sizeof(struct _MeshOps));
 43:   m->bops->publish    = PETSC_NULL /* MeshPublish_Petsc */;
 44:   m->type_name        = PETSC_NULL;
 45:   m->serialize_name   = PETSC_NULL;

 47:   m->dim              = -1;
 48:   m->setupcalled      = PETSC_FALSE;
 49:   m->data             = PETSC_NULL;
 50:   m->usr              = PETSC_NULL;

 52:   /* Domain information */
 53:   m->startX    = m->startY    = m->startZ    = 0.0;
 54:   m->endX      = m->endY      = m->endZ      = 0.0;
 55:   m->sizeX     = m->sizeY     = m->sizeZ     = 0.0;
 56:   m->locStartX = m->locStartY = m->locStartZ = 0.0;
 57:   m->locEndX   = m->locEndY   = m->locEndZ   = 0.0;
 58:   m->locSizeX  = m->locSizeY  = m->locSizeZ  = 0.0;
 59:   m->isPeriodic       = PETSC_FALSE;
 60:   m->isPeriodicDim[0] = PETSC_FALSE;
 61:   m->isPeriodicDim[1] = PETSC_FALSE;
 62:   m->isPeriodicDim[2] = PETSC_FALSE;

 64:   /* Mesh boundary information */
 65:   m->bdCtx    = PETSC_NULL;
 66:   m->bdCtxNew = PETSC_NULL;

 68:   /* Mesh generator information */
 69:   m->nodeOrdering = PETSC_NULL;

 71:   /* Mesh information */
 72:   m->numBd          = 0;
 73:   m->numVertices    = 0;
 74:   m->numNodes       = 0;
 75:   m->numBdNodes     = 0;
 76:   m->numEdges       = 0;
 77:   m->numBdEdges     = 0;
 78:   m->numFaces       = 0;
 79:   m->numBdFaces     = 0;
 80:   m->numCells       = 0;
 81:   m->numHoles       = 0;
 82:   m->numCorners     = 0;
 83:   m->numCellCorners = 0;
 84:   m->maxDegree      = 0;
 85:   m->holes          = 0;

 87:   /* Iterator support */
 88:   m->activeBd          = -1;
 89:   m->activeBdOld       = -1;
 90:   m->activeBdNode      = -1;
 91:   m->activeBdNodeClass = -1;

 93:   /* Quality limits */
 94:   m->maxAspectRatio = 1.0;

 96:   /* Partitioning support */
 97:   m->part        = PETSC_NULL;
 98:   m->partitioned = PETSC_FALSE;

100:   /* Coarsening support */
101:   m->coarseMap = PETSC_NULL;

103:   /* Graphics support */
104:   m->highlightElement = -1;

106:   /* Support calculations */
107:   m->support      = PETSC_NULL;
108:   m->supportTaken = PETSC_FALSE;

110:   /* Movement support */
111:   m->isMoving = PETSC_FALSE;

113:   *mesh = m;
114:   return(0);
115: }

117: /*@ 
118:   MeshSerialize - This function stores or recreates a mesh using a viewer for a binary file.

120:   Collective on MPI_Comm

122:   Input Parameters:
123: + comm   - The communicator for the mesh object
124: . viewer - The viewer context
125: - store  - This flag is PETSC_TRUE is data is being written, otherwise it will be read

127:   Output Parameter:
128: . mesh   - The mesh

130:   Level: beginner

132: .keywords: mesh, serialize
133: .seealso: PartitionSerialize(), GridSerialize()
134: @*/
135: int MeshSerialize(MPI_Comm comm, Mesh *mesh, PetscViewer viewer, PetscTruth store)
136: {
137:   int      (*serialize)(MPI_Comm, Mesh *, PetscViewer, PetscTruth);
138:   int        fd, len;
139:   char      *name;
140:   PetscTruth match;
141:   int        ierr;


147:   PetscTypeCompare((PetscObject) viewer, PETSC_VIEWER_BINARY, &match);
148:   if (match == PETSC_FALSE) SETERRQ(PETSC_ERR_ARG_WRONG, "Must be binary viewer");
149:   PetscViewerBinaryGetDescriptor(viewer, &fd);

151:   if (!MeshSerializeRegisterAllCalled) {
152:     MeshSerializeRegisterAll(PETSC_NULL);
153:   }
154:   if (!MeshSerializeList) SETERRQ(PETSC_ERR_ARG_CORRUPT, "Could not find table of methods");

156:   if (store) {
158:     PetscStrlen((*mesh)->class_name, &len);
159:     PetscBinaryWrite(fd, &len,                     1,   PETSC_INT,  0);
160:     PetscBinaryWrite(fd,  (*mesh)->class_name,     len, PETSC_CHAR, 0);
161:     PetscStrlen((*mesh)->serialize_name, &len);
162:     PetscBinaryWrite(fd, &len,                     1,   PETSC_INT,  0);
163:     PetscBinaryWrite(fd,  (*mesh)->serialize_name, len, PETSC_CHAR, 0);
164:     PetscFListFind(comm, MeshSerializeList, (*mesh)->serialize_name, (void (**)(void)) &serialize);
165:     if (!serialize) SETERRQ(PETSC_ERR_ARG_WRONG, "Type cannot be serialized");
166:     (*serialize)(comm, mesh, viewer, store);
167:   } else {
168:     PetscBinaryRead(fd, &len,    1,   PETSC_INT);
169:     PetscMalloc((len+1) * sizeof(char), &name);
170:     name[len] = 0;
171:     PetscBinaryRead(fd,  name,   len, PETSC_CHAR);
172:     PetscStrcmp(name, "Mesh", &match);
173:     PetscFree(name);
174:     if (match == PETSC_FALSE) SETERRQ(PETSC_ERR_ARG_WRONG, "Non-mesh object");
175:     /* Dispatch to the correct routine */
176:     PetscBinaryRead(fd, &len,    1,   PETSC_INT);
177:     PetscMalloc((len+1) * sizeof(char), &name);
178:     name[len] = 0;
179:     PetscBinaryRead(fd,  name,   len, PETSC_CHAR);
180:     PetscFListFind(comm, MeshSerializeList, name, (void (**)(void)) &serialize);
181:     if (!serialize) SETERRQ(PETSC_ERR_ARG_WRONG, "Type cannot be serialized");
182:     (*serialize)(comm, mesh, viewer, store);
183:     PetscStrfree((*mesh)->serialize_name);
184:     (*mesh)->serialize_name = name;
185:   }

187:   return(0);
188: }