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

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Revision 471 - (show annotations)
Fri Jan 27 01:33:02 2006 UTC (13 years, 8 months ago) by jgs
File MIME type: text/plain
File size: 9250 byte(s)
reorganise finley src tree to remove inc dir and src/finley directory

1 /*
2 ******************************************************************************
3 * *
4 * COPYRIGHT ACcESS 2003,2004,2005 - All Rights Reserved *
5 * *
6 * This software is the property of ACcESS. No part of this code *
7 * may be copied in any form or by any means without the expressed written *
8 * consent of ACcESS. Copying, use or modification of this software *
9 * by any unauthorised person is illegal unless that person has a software *
10 * license agreement with ACcESS. *
11 * *
12 ******************************************************************************
13 */
14
15 /**************************************************************/
16
17 /* Finley: Mesh */
18
19 /* searches for faces in the mesh which are matching */
20
21 /**************************************************************/
22
23 /* Author: gross@access.edu.au */
24 /* Version: $Id$
25
26 /**************************************************************/
27
28 #include "Util.h"
29 #include "Mesh.h"
30
31 /**************************************************************/
32
33 static double Finley_Mesh_lockingGridSize=0;
34
35 int Finley_Mesh_findMatchingFaces_compar(const void *arg1 , const void *arg2 ) {
36 Finley_Mesh_findMatchingFaces_center *e1,*e2;
37 bool_t l,g;
38 dim_t i;
39 e1=(Finley_Mesh_findMatchingFaces_center*) arg1;
40 e2=(Finley_Mesh_findMatchingFaces_center*) arg2;
41 for (i=0;i<MAX_numDim;i++) {
42 l= (e1->x[i]<e2->x[i]+Finley_Mesh_lockingGridSize) ? TRUE : FALSE;
43 g= (e2->x[i]<e1->x[i]+Finley_Mesh_lockingGridSize) ? TRUE : FALSE;
44 if (! (l && g)) {
45 if (l) return -1;
46 if (g) return 1;
47 }
48 }
49 return 0;
50 }
51
52 void Finley_Mesh_findMatchingFaces(Finley_NodeFile *nodes, Finley_ElementFile *faces, double safety_factor,double tolerance,
53 dim_t* numPairs, index_t* elem0,index_t* elem1,index_t* matching_nodes_in_elem1) {
54 #define getDist(_dist_,_e0_,_i0_,_e1_,_i1_) \
55 {dim_t i; \
56 _dist_=0; \
57 for (i=0;i<numDim;i++) _dist_=MAX(_dist_,ABS(X[INDEX3(i,_i0_,_e0_,numDim,NN)]-X[INDEX3(i,_i1_,_e1_,numDim,NN)])); \
58 }
59
60 #define SWAP(_i1_,_i2_) \
61 {index_t* i; \
62 i=(_i2_); \
63 (_i2_)=(_i1_); \
64 (_i1_)=i; \
65 }
66
67 char error_msg[LenErrorMsg_MAX];
68 double h=DBLE(HUGE_VAL),h_local,dist,*X=NULL;
69 dim_t NN=faces->ReferenceElement->Type->numNodes;
70 dim_t numDim=nodes->numDim;
71 Finley_Mesh_findMatchingFaces_center *center;
72 index_t e_0,e_1,a1[NN],a2[NN],*perm,*perm_tmp;
73 dim_t e,i,i0,i1,n;
74
75 X=TMPMEMALLOC(NN*numDim*faces->numElements,double);
76 center=TMPMEMALLOC(faces->numElements,Finley_Mesh_findMatchingFaces_center);
77 if (!(Finley_checkPtr(X) || Finley_checkPtr(center)) ) {
78 /* OMP */
79 for (e=0;e<faces->numElements;e++) {
80 /* get the coordinates of the nodes */
81 Finley_Util_Gather_double(NN,&(faces->Nodes[INDEX2(0,e,NN)]),numDim,nodes->Coordinates,&(X[INDEX3(0,0,e,numDim,NN)]));
82 /* get the element center */
83 center[e].refId=e;
84 for (i=0;i<MAX_numDim;i++) center[e].x[i]=0;
85 for (i0=0;i0<faces->ReferenceElement->Type->numNodesOnFace;i0++) {
86 for (i=0;i<numDim;i++) center[e].x[i]+=X[INDEX3(i,faces->ReferenceElement->Type->faceNode[i0],e,numDim,NN)];
87 }
88 for (i=0;i<numDim;i++) center[e].x[i]/=faces->ReferenceElement->Type->numNodesOnFace;
89 /* get the minimum distance between nodes in the element */
90 for (i0=0;i0<faces->ReferenceElement->Type->numNodesOnFace;i0++) {
91 for (i1=i0+1;i1<faces->ReferenceElement->Type->numNodesOnFace;i1++) {
92 getDist(h_local,e,faces->ReferenceElement->Type->faceNode[i0],e,faces->ReferenceElement->Type->faceNode[i1]);
93 h=MIN(h,h_local);
94 }
95 }
96 }
97 /* set the */
98 Finley_Mesh_lockingGridSize=h*MAX(safety_factor,0);
99 #ifdef Finley_TRACE
100 printf("locking grid size is %e\n",Finley_Mesh_lockingGridSize);
101 #endif
102 /* sort the elements by center center coordinates (lexigraphical)*/
103 qsort(center,faces->numElements,sizeof(Finley_Mesh_findMatchingFaces_center),Finley_Mesh_findMatchingFaces_compar);
104 /* find elements with matching center */
105 *numPairs=0;
106 /* OMP */
107 for (e=0;e<faces->numElements-1 && Finley_noError();e++) {
108 if (Finley_Mesh_findMatchingFaces_compar((void*) &(center[e]),(void*) &(center[e+1]))==0) {
109 e_0=center[e].refId;
110 e_1=center[e+1].refId;
111 elem0[*numPairs]=e_0;
112 elem1[*numPairs]=e_1;
113 /* now the element e_1 is rotated such that the first node in element e_0 and e_1 have the same coordinates */
114 perm=a1;
115 perm_tmp=a2;
116 for (i=0;i<NN;i++) perm[i]=i;
117 while (Finley_noError()) {
118 /* if node 0 and perm[0] are the same we are ready */
119 getDist(dist,e_0,0,e_1,perm[0]);
120 if (dist<=h*tolerance) break;
121 if (faces->ReferenceElement->Type->shiftNodes[0]>=0) {
122 /* rotate the nodes */
123 for (i=0;i<NN;i++) perm_tmp[i]=perm[faces->ReferenceElement->Type->shiftNodes[i]];
124 SWAP(perm,perm_tmp);
125 }
126 /* if the permutation is back at the identity, ie. perm[0]=0, the faces don't match: */
127 if (perm[0]==0) {
128 sprintf(error_msg,"__FILE__:couldn't match first node of element %d to touching element %d",e_0,e_1);
129 Finley_setError(VALUE_ERROR,error_msg);
130 }
131 }
132 /* now we check if the second nodes match */
133 if (Finley_noError()) {
134 if (faces->ReferenceElement->Type->numNodesOnFace>1) {
135 getDist(dist,e_0,1,e_1,perm[faces->ReferenceElement->Type->faceNode[1]]);
136 /* if the second node does not match we reverse the direction of the nodes */
137 if (dist>h*tolerance) {
138 /* rotate the nodes */
139 if (faces->ReferenceElement->Type->reverseNodes[0]<0) {
140 sprintf(error_msg,"__FILE__:couldn't match the second node of element %d to touching element %d",e_0,e_1);
141 Finley_setError(VALUE_ERROR,error_msg);
142 } else {
143 for (i=0;i<NN;i++) perm_tmp[i]=perm[faces->ReferenceElement->Type->reverseNodes[i]];
144 SWAP(perm,perm_tmp);
145 getDist(dist,e_0,1,e_1,perm[faces->ReferenceElement->Type->faceNode[1]]);
146 if (dist>h*tolerance) {
147 sprintf(error_msg,"__FILE__:couldn't match the second node of element %d to touching element %d",e_0,e_1);
148 Finley_setError(VALUE_ERROR,error_msg);
149 }
150 }
151 }
152 }
153 }
154 /* we check if the rest of the face nodes match: */
155 if (Finley_noError()) {
156 for (i=2;i<faces->ReferenceElement->Type->numNodesOnFace;i++) {
157 n=faces->ReferenceElement->Type->faceNode[i];
158 getDist(dist,e_0,n,e_1,perm[n]);
159 if (dist>h*tolerance) {
160 sprintf(error_msg,"__FILE__:couldn't match the %d-th node of element %d to touching element %d",i,e_0,e_1);
161 Finley_setError(VALUE_ERROR,error_msg);
162 break;
163 }
164 }
165 }
166 /* copy over the permuted nodes of e_1 into matching_nodes_in_elem1 */
167 if (Finley_noError()) {
168 for (i=0;i<NN;i++) matching_nodes_in_elem1[INDEX2(i,*numPairs,NN)]=faces->Nodes[INDEX2(perm[i],e_1,NN)];
169 }
170 (*numPairs)++;
171 }
172 }
173 #ifdef Finley_TRACE
174 printf("number of pairs of matching faces %d\n",*numPairs);
175 #endif
176 }
177 /* clean up */
178 TMPMEMFREE(X);
179 TMPMEMFREE(center);
180
181 #undef getDist
182 #undef SWAP
183 }
184
185 /*
186 * $Log$
187 * Revision 1.6 2005/09/15 03:44:22 jgs
188 * Merge of development branch dev-02 back to main trunk on 2005-09-15
189 *
190 * Revision 1.5.2.1 2005/09/07 06:26:19 gross
191 * the solver from finley are put into the standalone package paso now
192 *
193 * Revision 1.5 2005/07/08 04:07:51 jgs
194 * Merge of development branch back to main trunk on 2005-07-08
195 *
196 * Revision 1.4 2004/12/15 07:08:32 jgs
197 * *** empty log message ***
198 * Revision 1.1.1.1.2.2 2005/06/29 02:34:51 gross
199 * some changes towards 64 integers in finley
200 *
201 * Revision 1.1.1.1.2.1 2004/11/24 01:37:14 gross
202 * some changes dealing with the integer overflow in memory allocation. Finley solves 4M unknowns now
203 *
204 *
205 *
206 */
207

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