/[escript]/trunk/finley/src/Mesh_resolveNodeIds.c
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Contents of /trunk/finley/src/Mesh_resolveNodeIds.c

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Revision 1388 - (show annotations)
Fri Jan 11 07:45:58 2008 UTC (11 years, 8 months ago) by trankine
File MIME type: text/plain
File size: 5219 byte(s)
And get the *(&(*&(* name right
1
2 /* $Id$ */
3
4 /*******************************************************
5 *
6 * Copyright 2003-2007 by ACceSS MNRF
7 * Copyright 2007 by University of Queensland
8 *
9 * http://esscc.uq.edu.au
10 * Primary Business: Queensland, Australia
11 * Licensed under the Open Software License version 3.0
12 * http://www.opensource.org/licenses/osl-3.0.php
13 *
14 *******************************************************/
15
16 /**************************************************************/
17
18 /* Finley: Mesh */
19
20 /* at input the element nodes refers to the numbering defined the global Id assigned to the nodes in the */
21 /* NodeFile. It is also not ensured that all nodes refered by an element is actually available */
22 /* on the process. At the output, a local node labeling is used and all nodes are available */
23 /* In particular the numbering of the element nodes is between 0 and in->NodeFile->numNodes */
24 /* The function does not create a distribution of the degrees of freedom. */
25
26 /**************************************************************/
27
28 #include "Mesh.h"
29 #include "Util.h"
30
31 /**************************************************************/
32
33 void Finley_Mesh_resolveNodeIds(Finley_Mesh* in) {
34
35 index_t min_id, max_id, min_id2, max_id2, global_min_id, global_max_id,
36 *globalToNewLocalNodeLabels=NULL, *newLocalToGlobalNodeLabels=NULL;
37 dim_t len, n, newNumNodes, numDim;
38 Finley_NodeFile *newNodeFile=NULL;
39 #ifdef PASO_MPI
40 index_t id_range[2], global_id_range[2];
41 #endif
42 numDim=Finley_Mesh_getDim(in);
43 /* find the minimum and maximum id used by elements: */
44 min_id=INDEX_T_MAX;
45 max_id=-INDEX_T_MAX;
46 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->Elements);
47 max_id=MAX(max_id,max_id2);
48 min_id=MIN(min_id,min_id2);
49 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->FaceElements);
50 max_id=MAX(max_id,max_id2);
51 min_id=MIN(min_id,min_id2);
52 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->ContactElements);
53 max_id=MAX(max_id,max_id2);
54 min_id=MIN(min_id,min_id2);
55 Finley_ElementFile_setNodeRange(&min_id2,&max_id2,in->Points);
56 max_id=MAX(max_id,max_id2);
57 min_id=MIN(min_id,min_id2);
58 #ifdef PASO_MPI
59 id_range[0]=-min_id;
60 id_range[1]=max_id;
61 MPI_Allreduce( id_range, global_id_range, 2, MPI_INT, MPI_MAX, in->MPIInfo->comm );
62 global_min_id=-global_id_range[0];
63 global_max_id=global_id_range[1];
64 #else
65 global_min_id=min_id;
66 global_max_id=max_id;
67 #endif
68 #ifdef Finley_TRACE
69 printf("Node id range used by elements is %d:%d\n",global_min_id,global_max_id);
70 #endif
71
72
73
74 /* allocate mappings for new local node labeling to global node labeling (newLocalToGlobalNodeLabels)
75 and global node labeling to the new local node labeling (globalToNewLocalNodeLabels[i-min_id] is the
76 new local id of global node i) */
77 len=max_id-min_id+1;
78 globalToNewLocalNodeLabels=TMPMEMALLOC(len,index_t); /* local mask for used nodes */
79 newLocalToGlobalNodeLabels=TMPMEMALLOC(len,index_t);
80 if (! ( (Finley_checkPtr(globalToNewLocalNodeLabels) && Finley_checkPtr(newLocalToGlobalNodeLabels) ) ) ) {
81
82 #pragma omp parallel
83 {
84 #pragma omp for private(n) schedule(static)
85 for (n=0;n<len;n++) newLocalToGlobalNodeLabels[n]=-1;
86 #pragma omp for private(n) schedule(static)
87 for (n=0;n<len;n++) globalToNewLocalNodeLabels[n]=-1;
88 }
89
90 /* mark the nodes referred by elements in globalToNewLocalNodeLabels which is currently used as a mask: */
91
92 Finley_Mesh_markNodes(globalToNewLocalNodeLabels,min_id,in,FALSE);
93
94 /* create a local labeling newLocalToGlobalNodeLabels of the local nodes by packing the mask globalToNewLocalNodeLabels*/
95
96 newNumNodes=Finley_Util_packMask(len,globalToNewLocalNodeLabels,newLocalToGlobalNodeLabels);
97
98 /* invert the new labeling and shift the index newLocalToGlobalNodeLabels to global node ids */
99 #pragma omp parallel for private(n) schedule(static)
100 for (n=0;n<newNumNodes;n++) {
101 #ifdef BOUNDS_CHECK
102 if (n >= len || n < 0) { printf("BOUNDS_CHECK %s %d n=%d\n", __FILE__, __LINE__, n); exit(1); }
103 if (newLocalToGlobalNodeLabels[n] >= len || newLocalToGlobalNodeLabels[n] < 0) { printf("BOUNDS_CHECK %s %d n=%d\n", __FILE__, __LINE__, n); exit(1); }
104 #endif
105 globalToNewLocalNodeLabels[newLocalToGlobalNodeLabels[n]]=n;
106 newLocalToGlobalNodeLabels[n]+=min_id;
107 }
108 /* create a new table */
109 newNodeFile=Finley_NodeFile_alloc(numDim,in->MPIInfo);
110 if (Finley_noError()) {
111 Finley_NodeFile_allocTable(newNodeFile,newNumNodes);
112 }
113 if (Finley_noError())
114 Finley_NodeFile_gather_global(newLocalToGlobalNodeLabels,in->Nodes, newNodeFile);
115 if (Finley_noError()) {
116 Finley_NodeFile_free(in->Nodes);
117 in->Nodes=newNodeFile;
118 /* relable nodes of the elements: */
119 Finley_Mesh_relableElementNodes(globalToNewLocalNodeLabels,min_id,in);
120 }
121 }
122 TMPMEMFREE(globalToNewLocalNodeLabels);
123 TMPMEMFREE(newLocalToGlobalNodeLabels);
124 if (! Finley_noError()) {
125 Finley_NodeFile_free(newNodeFile);
126 }
127 }

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