Exemple #1
0
  int MESH_CheckTopo(Mesh_ptr mesh) {
    int valid = 1;
    char mesg[256], funcname[32] = "MESH_CheckTopo";
    int idx1, idx2, idx3, idx4;
    MVertex_ptr mv;
    MEdge_ptr me, ve, fe, re;
    MFace_ptr mf, vf, ef, rf;
    MRegion_ptr mr, vr, er, fr;
    int found, done;
    int dir;
    int i, j, k;
    int nfe;
    int vid, eid, fid, rid;
    int gvid, geid, gfid, grid;
    int gvdim, gedim, gfdim, grdim;
    int maxiter = 1000;
    List_ptr vedges, vfaces, vregions;
    List_ptr efaces;
    List_ptr fverts, fedges, fregs, fregs1;
    List_ptr rverts, redges, rfaces;



    /*****************************************************************/
    /* Vertices                                                      */
    /*****************************************************************/    

    
    /* Check that edges connected to vertices reference the vertices */
    /* Also check that the classification of the vertex is consistent
       with respect to the edge */

    int first_unknown_classfn = 1;
    idx1 = 0;
    while ((mv = MESH_Next_Vertex(mesh,&idx1))) {

#ifdef MSTK_HAVE_MPI
      if (MV_PType(mv) == PGHOST) continue;
#endif      

      vid = MV_ID(mv);
      gvdim = MV_GEntDim(mv);
      gvid  = MV_GEntID(mv);

      if (gvdim == 4 && first_unknown_classfn) {
        sprintf(mesg, "Vertex %-d - classification unknown\n", vid);
        MSTK_Report(funcname, mesg, MSTK_WARN);
        first_unknown_classfn = 0;
      }
      vedges = MV_Edges(mv);
      if (!vedges) {
        sprintf(mesg,"Vertex %-d does not have any connected edges\n",vid);
        MSTK_Report(funcname,mesg,MSTK_WARN);
        continue;
      }

      idx2 = 0;
      while ((ve = List_Next_Entry(vedges,&idx2))) {
	
	eid = ME_ID(ve);
	     
	if (ME_Vertex(ve,0) != mv && ME_Vertex(ve,1) != mv) {
	  sprintf(mesg,"Vertex %-d connected to edge %-d but edge does not use vertex",vid,eid);
	  MSTK_Report(funcname,mesg,MSTK_ERROR);
	  valid = 0;
	}

      }


      if (gvdim == 1) {

	/* If vertex is classified on a model edge, then it should be
	   connected to two and only two edges that are classified on
	   the same model edge */

	int ne = 0;
	idx2 = 0;
	while ((ve = List_Next_Entry(vedges,&idx2))) {	  
	  gedim = ME_GEntDim(ve);
	  geid  = ME_GEntID(ve);	  
	  if (gedim == 1 && geid == gvid) ne++;
	}
	  
	if (ne != 2) {
	  sprintf(mesg,"Vertex %-d classified on model edge %-d but it is not \n connected to two edges classified on this model edge",vid,gvid);
	  MSTK_Report(funcname,mesg,MSTK_WARN);
	}
      }

      List_Delete(vedges);



      if (gvdim == 2) {
	MEdge_ptr e0, ecur, enxt;
	MFace_ptr fcur;
        int flipped = 0;

	/* If vertex is classified on a model face, then we should be
	   able to find a ring of faces classified on that model
	   face */

	vfaces = MV_Faces(mv);

	found = 0;
	idx2 = 0;
	while ((vf = List_Next_Entry(vfaces,&idx2))) {
	  if (MF_GEntDim(vf) == 2) {
	    found = 1;
	    break;
	  }
	}
        List_Delete(vfaces);

	if (!found) {
	  sprintf(mesg,"Vertex %-d classified on model face %-d but could not \n find connected face classified on this model face",vid,gvid);
	  MSTK_Report(funcname,mesg,MSTK_WARN);
	  valid = 0;
	}

	fcur = vf;

	fedges = MF_Edges(fcur,1,mv);
	nfe = List_Num_Entries(fedges);
	e0 = List_Entry(fedges,0);
	ecur = e0;
	enxt = List_Entry(fedges,nfe-1);
	List_Delete(fedges);
	
	done = 0; i = 0;
	while (!done) {
	  ecur = enxt;
	  efaces = ME_Faces(ecur);
	  found = 0;
	  idx3 = 0;
	  while ((ef = List_Next_Entry(efaces,&idx3))) {
	    if (ef != fcur && MF_GEntDim(ef) == 2 && MF_GEntID(ef) == gvid) {
	      fcur = ef;
	      found = 1;
	      break;
	    }
	  }
	  List_Delete(efaces);

	  if (!found) {
	    sprintf(mesg,"Could not find next boundary face connected to vertex %-d",vid);
	    MSTK_Report(funcname,mesg,MSTK_WARN);
	    valid = 0;
	    break;
	  }
	   
	  fedges = MF_Edges(fcur,1,mv);
	  nfe = List_Num_Entries(fedges);

          if (List_Entry(fedges,0) == ecur)
            enxt = List_Entry(fedges,nfe-1);
          else if (List_Entry(fedges,nfe-1) == ecur) {
            enxt = List_Entry(fedges,0);
            flipped = 1;
          }
          else {
            sprintf(mesg,"Could not find next edge while traversing around vertex %-d on model face %-d",vid,gvid);
            MSTK_Report(funcname,mesg,MSTK_ERROR);
          }

	  List_Delete(fedges);

	  if (enxt == e0)
	    done = 1;

	  if (++i > maxiter)
	    break;
	}

	if (!done) {
	  sprintf(mesg,"Vertex %-d classified on model face %-d but could not  find ring of faces classified on this model face",vid,gvid);
	  MSTK_Report(funcname,mesg,MSTK_WARN);
	}

        if (done && flipped) {
          List_ptr fregs = MF_Regions(fcur);
          if (List_Num_Entries(fregs) < 2) {
            sprintf(mesg,"Inconsistent orientations of boundary faces around vertex %-d",vid);
            MSTK_Report(funcname,mesg,MSTK_WARN);
          }
          if (fregs) List_Delete(fregs);
        }
      }


    } /* while ((mv = MESH_Next_Vertex(mesh,&idx1))) */




    /*****************************************************************/
    /* Edges                                                      */
    /*****************************************************************/    

    first_unknown_classfn = 1;
    idx1 = 0;
    while ((me = MESH_Next_Edge(mesh,&idx1))) {

#ifdef MSTK_HAVE_MPI
      if (ME_PType(me) == PGHOST) continue;
#endif

      eid = ME_ID(me);
      gedim = ME_GEntDim(me);
      geid = ME_GEntID(me);

      if (gedim == 4 && first_unknown_classfn) {
        sprintf(mesg, "Edge %-d - unknown classification", eid);
        MSTK_Report(funcname, mesg, MSTK_WARN);
        first_unknown_classfn = 0;
      }

      if (ME_Vertex(me,0) == ME_Vertex(me,1)) {
        sprintf(mesg,"Edge %-d has repeated vertices",eid);
        MSTK_Report(funcname,mesg,MSTK_ERROR);
      }

      for (i = 0; i < 2; i++) {
	MVertex_ptr ev = ME_Vertex(me,i);

	vid = MV_ID(ev);
	gvid = MV_GEntID(ev);
	gvdim = MV_GEntDim(ev);

        if (gvdim != 4 && gvdim != 4) {  /* vertex and edge classifn is known */
          if (gedim < gvdim) {
            sprintf(mesg,"Edge %-d classified on lower dimensional entity than  connected vertex %-d",eid,vid);
            MSTK_Report(funcname,mesg,MSTK_WARN);
            valid = 0;
          }
          else if (gedim == gvdim && geid != gvid) {
            sprintf(mesg,"Edge %-d and its vertex %-d classified on different entities of the same dimension",eid,vid);
            MSTK_Report(funcname,mesg,MSTK_WARN);
            valid = 0;
          }
        }

	vedges = MV_Edges(ev);
	if (!List_Contains(vedges,me)) {
	  sprintf(mesg,"Edge %-d sees vertex %-d but not vice versa",eid,vid);
	  MSTK_Report(funcname,mesg,MSTK_ERROR);
	  valid = 0;
	}
	List_Delete(vedges);

	if (gedim == 2) {
	  MFace_ptr ebf[2], fcur, fnxt;
	  MRegion_ptr rcur;
	  int nf, nfr;
	  List_ptr eregs;

	  /* Edge is classified on model face - it should be connected
	     to two and only two faces also classified on this model
	     face */

	  ebf[0] = ebf[1] = NULL;
	  nf = 0;
	  efaces = ME_Faces(me);
	  idx2 = 0;
	  while ((ef = List_Next_Entry(efaces,&idx2))) {
	    fid = MF_ID(ef);

	    if (MF_GEntDim(ef) == 2) {
	      nf++;
	      if (gedim == 2 && MF_GEntID(ef) != geid) {
		sprintf(mesg,"Face %-d connected to edge %-d classified on different model face",fid,eid);
		MSTK_Report(funcname,mesg,MSTK_WARN);
		valid = 0;
	      }

	      if (ebf[0] == NULL)
		ebf[0] = ef;
	      else
		ebf[1] = ef;
	    }
	  }
	  List_Delete(efaces);

	  if (nf != 2) {
	    sprintf(mesg,"Boundary edge %-d is not connected to exactly two\n  faces classified on the boundary",eid);
	    MSTK_Report(funcname,mesg,MSTK_ERROR);
	    valid = 0;
	  }


	  eregs = ME_Regions(me);
	  if (!eregs) 
	    continue;
	  else
	    List_Delete(eregs);

	  /* Can we go from f0 to f1 in one or two dirs? */

	  fcur = ebf[0];
          fnxt = NULL;
	  fregs = MF_Regions(fcur);
	  if (!fregs) {
	    fid = MF_ID(fcur);
	    sprintf(mesg,"Edge %-d connected to regions but face %-d is not",eid,fid);
	    MSTK_Report(funcname,mesg,MSTK_ERROR);
	    valid = 0;
	  }

	  nfr = List_Num_Entries(fregs);
	  for (i = 0; i < nfr; i++) {
	    rcur = List_Entry(fregs,i);
	  
	    rfaces = MR_Faces(rcur);
	    idx3 = 0;
	    found = 0;
	    while ((rf = List_Next_Entry(rfaces,&idx3))) {
	      if (rf != fcur && MF_UsesEntity(rf,me,1)) {
		found = 1;
		fnxt = rf;
		break;
	      }
	    }
	    List_Delete(rfaces);
	    
	    if (!found) {
	      rid = MR_ID(rcur);
	      sprintf(mesg,"Could not find second face in region %-d using edge %-d",rid,eid);
	    }
	    
	    
	    done = 0; j = 0;
	    while (!done) {
	      fcur = fnxt;
	      fid = MF_ID(fcur);
	      
	      if (fnxt == ebf[1]) {
		done = 1;
		break;
	      }
	      
	      fregs1 = MF_Regions(fcur);
	      idx3 = 0;
	      while ((fr = List_Next_Entry(fregs1,&idx3))) {
		if (fr != rcur) {
		  rcur = fr;
		  found = 1;
		  break;
		}
	      }
	      List_Delete(fregs1);

	      if (!found) {
		sprintf(mesg,"Could not find next region around edge %-d",eid);
		MSTK_Report(funcname,mesg,MSTK_ERROR);
		valid = 0;
		break;
	      }
	      
	      
	      rfaces = MR_Faces(rcur);
	      idx3 = 0;
	      found = 0;
	      while ((rf = List_Next_Entry(rfaces,&idx3))) {
		if (rf != fcur && MF_UsesEntity(rf,me,1)) {
		  found = 1;
		  fnxt = rf;
		  break;
		}
	      }
	      List_Delete(rfaces);
	      
	      if (!found) {
		rid = MR_ID(rcur);
		sprintf(mesg,"Could not find second face in region %-d using edge %-d",rid,eid);
	      }
	      
	      if (++j > maxiter)
		break;
	    } /* while (!done) */

	    if (!done) {
	      sprintf(mesg,"Could not traverse around edge %-d from face %-d to face %-d",eid,MF_ID(ebf[0]),MF_ID(ebf[1]));
	      MSTK_Report(funcname,mesg,MSTK_ERROR);
	      valid = 0;
	    }
	  } /* for (i = 0; i < nfr; i++) */
          List_Delete(fregs);

	} /* if (geid == 2) */

      } /* for (i = 0; i < 2; i++) */

    } /* while ((me = MESH_Next_Edge(mesh,&idx1))) */



    /*****************************************************************/
    /* Faces                                                      */
    /*****************************************************************/    

    first_unknown_classfn = 1;
    idx1 = 0;
    while ((mf = MESH_Next_Face(mesh,&idx1))) {

#ifdef MSTK_HAVE_MPI
      if (MF_PType(mf) == PGHOST) continue;
#endif

      fid = MF_ID(mf);
      gfid = MF_GEntID(mf);
      gfdim = MF_GEntDim(mf);

      if (gfdim == 4 && first_unknown_classfn) {
        sprintf(mesg, "Face %-d - unknown classification", fid);
        MSTK_Report(funcname, mesg, MSTK_WARN);
        first_unknown_classfn = 0;
      }

      fedges = MF_Edges(mf,1,0);

      if (List_Num_Entries(fedges) < 3) {
        sprintf(mesg,"Face %-d has less than 3 edges",fid);
        MSTK_Report(funcname,mesg,MSTK_ERROR);
      }

      idx2 = 0;
      while ((fe = List_Next_Entry(fedges,&idx2))) {
	eid = ME_ID(fe);
	geid = ME_GEntID(fe);
	gedim = ME_GEntDim(fe);

        if (gedim != 4 && gfdim != 4) {  /* Edge, Face classfn is known */
          if (gfdim < gedim) {
            sprintf(mesg,"Face %-d classified on lower order entity than edge %-d",fid,ME_ID(fe));
            MSTK_Report(funcname,mesg,MSTK_WARN);
            valid = 0;
          }
          else if (gedim == gfdim && geid != gfid) {
            sprintf(mesg,"Face %-d and edge %-d classified on different\n entities of the same dimension",fid,eid);
            MSTK_Report(funcname,mesg,MSTK_WARN);
          }
        }

	efaces = ME_Faces(fe);
	if (!List_Contains(efaces,mf)) {
	  sprintf(mesg,"Face %-d refers to edge %-d but not vice versa",fid,ME_ID(fe));
	  MSTK_Report(funcname,mesg,MSTK_ERROR);
	  valid = 0;
	}
	List_Delete(efaces);
      }
      List_Delete(fedges);
      

      fregs = MF_Regions(mf);

      if (gfdim == 3) {
	if (!fregs || List_Num_Entries(fregs) != 2) {
	  sprintf(mesg,"Interior face %-d does not have two connected regions",fid);
	  MSTK_Report(funcname,mesg,MSTK_ERROR);
	  valid = 0;
	}
      }


      if (fregs) {
	if (List_Num_Entries(fregs) == 2) {
	  if (MR_FaceDir(List_Entry(fregs,0),mf) == MR_FaceDir(List_Entry(fregs,1),mf)) {
	    sprintf(mesg,"Both regions using face %-d in the same sense",fid);
	    MSTK_Report(funcname,mesg,MSTK_ERROR);
	    valid = 0;
	  }
	}
	List_Delete(fregs);      
      }


    } /* while ((mf = MESH_Next_Face(mesh,&idx1))) */



    /*****************************************************************/
    /* Regions                                                      */
    /*****************************************************************/    

    idx1 = 0;
    while ((mr = MESH_Next_Region(mesh,&idx1))) {
      
#ifdef MSTK_HAVE_MPI
      if (MR_PType(mr) == PGHOST) continue;
#endif

      rid = MR_ID(mr);
      grid = MR_GEntID(mr);

      rfaces = MR_Faces(mr);
      int nrf = List_Num_Entries(rfaces);

      if (nrf < 4) {
        sprintf(mesg,"Region %-d has less than 4 faces",rid);
        MSTK_Report(funcname,mesg,MSTK_ERROR);
      }

      /* Check that face to region and region to face links are consistent
         with each other */
      int *rfdirs = (int *) malloc(nrf*sizeof(int));

      i = 0;
      idx2 = 0;
      while ((rf = List_Next_Entry(rfaces,&idx2))) {
	rfdirs[i] = MR_FaceDir_i(mr,i);
	if (mr != MF_Region(rf,!rfdirs[i])) {
	  sprintf(mesg,"Region %-d to face %-d dir inconsistent with \n face to region dir",rid,MF_ID(rf));
	  MSTK_Report(funcname,mesg,MSTK_ERROR);
	  valid = 0;
	}

        i++;
      }


      /* Check that faces of a region have consistent orientation in
         the region with respect to each other */
      
      for (i = 0; i < nrf; i++) {
        MFace_ptr rf, rf2;

        rf = List_Entry(rfaces,i);

        fedges = MF_Edges(rf,1,0);
        nfe = List_Num_Entries(fedges);
        
        for (j = 0; j < nfe; j++) {
          fe = List_Entry(fedges,j);
          int fedir = MF_EdgeDir_i(rf,j);
          
          /* Find adjacent face in the region */
          found = 0;
          for (k = 0; k < nrf; k++) {
            rf2 = List_Entry(rfaces,k);
            if (rf != rf2 && MF_UsesEntity(rf2,fe,MEDGE)) {
              found = 1;
              break;
            }
          }

          if (!found) {
            sprintf(mesg,"Cannot find another face in region %-d sharing edge %-d (ID = %-d) of face with ID = %-d",MR_ID(mr),j,ME_ID(fe),MF_ID(rf));
            MSTK_Report(funcname,mesg,MSTK_ERROR);
            valid = 0;
          }
          
          int fedir_adj = MF_EdgeDir(rf2,fe);
          
          /* If the two faces use the edge in opposite directions then
             the region should use the faces in the same direction and
             vice versa */

          if (((fedir_adj == fedir) && (rfdirs[i] == rfdirs[k])) ||
              ((fedir_adj != fedir) && (rfdirs[i] != rfdirs[k]))) {
            sprintf(mesg,"Region %-d faces are inconsistently oriented",MR_ID(mr));
            MSTK_Report(funcname,mesg,MSTK_ERROR);
            valid = 0;
          }
        }
        List_Delete(fedges);
           
      }
      List_Delete(rfaces);
      free(rfdirs);
    }

    return valid;

  } /* int MESH_CheckTopo */
  int MESH_BuildFaceClassfn(Mesh_ptr mesh, int use_geometry) {
  int i, j, k, idx, idx2, fnd, gfid, gfid2, gdim;
  int ngfaces, ngfalloc, grid0, grid1;
  int max_gface_id, processedmk, submk;
  int nfe, nef, nbf, nfr, nsub, *gfids, (*gfregids)[2];
  double PI=3.141592, ang, COSSHARPANG;
  MEdge_ptr edge;
  MFace_ptr face, subface, adjface;
  MRegion_ptr freg0, freg1;
  List_ptr fregs, fedges, efaces, ebfaces, gffaces, subfaces;

  COSSHARPANG = cos(9*PI/12);  /* 135 degrees */


  /* Verify that mesh faces on the boundary have classification
     information; if not, assign all faces to the same model faces */

  ngfaces = 0; ngfalloc = 10;
  gfids = (int *) malloc(ngfalloc*sizeof(int));
  gfregids = (int (*)[2]) malloc(ngfalloc*sizeof(int [2]));


  /* Take stock of existing model face information */

  max_gface_id = 0;
  idx = 0;
  while ((face = MESH_Next_Face(mesh,&idx))) {
    gdim = MF_GEntDim(face);
    if (gdim != 2)
      continue;

    gfid = MF_GEntID(face);
    if (gfid) {

      /* Has this model face been encountered? If not, add it to list
	 of model faces */

      for (i = 0, fnd = 0; i < ngfaces; i++)
	if (gfids[i] == gfid) {
	  fnd = 1;
	  break;
	}

      if (!fnd) {
	if (gfid > max_gface_id)
	  max_gface_id = gfid;

	if (ngfalloc == ngfaces) {
	  ngfalloc *= 2;
	  gfids = (int *) realloc(gfids,ngfalloc*sizeof(int));
	  gfregids = (int (*)[2])realloc(gfregids,ngfalloc*sizeof(int [2]));
	}

	gfids[ngfaces] = gfid;
	gfregids[ngfaces][0] = gfregids[ngfaces][1] = 0;
	fregs = MF_Regions(face);
	if (fregs) {
	  nfr = List_Num_Entries(fregs);
      
	  freg0 = List_Entry(fregs,0);
	  gfregids[ngfaces][0] = MR_GEntID(freg0); /* NOTE 1 (see EOF) */
      
	  if (nfr == 2) {
	    freg1 = List_Entry(fregs,1); 
	    gfregids[ngfaces][1] = MR_GEntID(freg1);
	  }	  
	  
	  List_Delete(fregs);
	}

	ngfaces++;
      }

    }
  }


  /* Build new model face information based on adjacent model region info */

  idx = 0;
  while ((face = MESH_Next_Face(mesh,&idx))) {
    
    gdim = MF_GEntDim(face);
    gfid = MF_GEntID(face);

    /* Face has no classification? Assign classification info */
    /* Face classified as interior face? Verify */
    
    freg0 = freg1 = NULL;
    grid0 = grid1 = 0;
    fregs = MF_Regions(face);
    if (fregs) {
      nfr = List_Num_Entries(fregs);
      
      freg0 = List_Entry(fregs,0);
      grid0 = MR_GEntID(freg0);
      
      if (nfr == 2) {
	freg1 = List_Entry(fregs,1); 
	grid1 = MR_GEntID(freg1);
      }
      
      List_Delete(fregs);
    }
    else
      nfr = 0;
    
    if (nfr == 2 && (grid0 == grid1)) {
      /* Interior face */
      
      MF_Set_GEntDim(face,3);
      MF_Set_GEntID(face,grid0);
    }
    else {
      /* Boundary face */
      
      if (gdim > 2 || (gdim == 2 && gfid <= 0)) { 
	MF_Set_GEntDim(face,2);

	/* Check if this type of face with these adjacent regions has
	   been encountered before; if it has, we just use the
	   existing model face id */

	for (i = 0, fnd = 0; i < ngfaces; i++)
	  if ((gfregids[i][0] == grid0 && gfregids[i][1] == grid1) ||
	      (gfregids[i][0] == grid1 && gfregids[i][1] == grid0)) {
	    fnd = 1;
	    break;
	  }

	if (fnd)
	  MF_Set_GEntID(face,gfids[i]);
	else {
	  max_gface_id++;
	  MF_Set_GEntID(face,max_gface_id);

	  if (ngfalloc == ngfaces) {
	    ngfalloc *= 2;
	    gfids = (int *) realloc(gfids,ngfalloc*sizeof(int));
	    gfregids = (int (*)[2]) realloc(gfregids,ngfalloc*sizeof(int [2]));
	  }

	  gfids[ngfaces] = max_gface_id;
	  gfregids[ngfaces][0] = grid0;
	  gfregids[ngfaces][1] = grid1;
	  ngfaces++;
	}
      }
    }
  }

  if (use_geometry == 1) {

    /* Now assign model face IDs based on whether a sharp set of edges
       enclose a set of faces */

    for (i = 0; i < ngfaces; i++) {

      /* Find all mesh faces with this model face id */

      gffaces = List_New(10);
      idx = 0; 
      while ((face = MESH_Next_Face(mesh,&idx))) {
        if (MF_GEntDim(face) == 2 && MF_GEntID(face) == gfids[i])
          List_Add(gffaces,face);
      }

      /* Process faces of this list and subdivide them into subfaces */
      /* The way we do that is 
       
         1) we put an unprocessed face from the original list in a subface
         list

         2) we then add its neighboring faces to subface list if they are
         of the same color (same model face id) and do not have a sharp
         edge separating them from the current face

         3) we then process the next face in the subface list 

         4) we are done if we cannot find any more neighbors of faces in
         the subface list to add to the subface list

         5) we then repeat steps 1 through 4 until we are left with no
         more faces to process from the original list
       
      */

      processedmk = MSTK_GetMarker();

      nsub = 0;
      idx = 0;
      while ((face = List_Next_Entry(gffaces,&idx))) {
        if (MEnt_IsMarked(face,processedmk))
          continue;

        /* Found a face in gffaces that has not been processed */
        MEnt_Mark(face,processedmk);

        submk = MSTK_GetMarker();
        subfaces = List_New(10);
        List_Add(subfaces,face);
        MEnt_Mark(face,submk);

        idx2 = 0;
        while ((subface = List_Next_Entry(subfaces,&idx2))) {
          gfid = MF_GEntID(subface);

          fedges = MF_Edges(subface,1,0);
          nfe = List_Num_Entries(fedges);

          for (j = 0; j < nfe; j++) {
            edge = List_Entry(fedges,j);
            efaces = ME_Faces(edge);
            nef = List_Num_Entries(efaces);

            ebfaces = List_New(nef); /* list of boundary faces cnctd 2 edge */
            for (k = 0; k < nef; k++) {
              adjface = List_Entry(efaces,k);
              if (MF_GEntDim(adjface) == 2)
                List_Add(ebfaces,adjface);
            }
            List_Delete(efaces);

            nbf = List_Num_Entries(ebfaces);
            if (nbf == 2) {
              /* we might be on a model face or on a model edge */
            
              adjface = List_Entry(ebfaces,0);
              if (adjface == subface)
                adjface = List_Entry(ebfaces,1);
              gfid2 = MF_GEntID(adjface);

            
              if (gfid == gfid2) {
                /* The two faces are of the same ID. If the angle
                   between them is not sharp they can be classified as
                   being on the same subface */
	      
                ang = MFs_DihedralAngle(subface,adjface,edge);
              
                if (ang <= COSSHARPANG) {
                  /* Add face2 to subface list unless its already there */
                  if (!MEnt_IsMarked(adjface,submk)) {
                    List_Add(subfaces,adjface);
                    MEnt_Mark(adjface,submk);
                  }
                }
                else {
                  /* The two faces make a very sharp angle. We will
                     consider the edge b/w them to be a model edge */
                  /* Tag the edge as being on a model edge (we don't
                     know the model edge ID as yet) and continue */
                
                  ME_Set_GEntDim(edge,1);
                  ME_Set_GEntID(edge,0);
                }
              }
              else {
                /* we reached a model edge */
                /* Tag the edge as being on a model edge (we don't know
                   the model edge ID as yet) and continue */

                ME_Set_GEntDim(edge,1);
                ME_Set_GEntID(edge,0);
              }
            }
            else {
              /* we reached a a model edge */
              /* Tag the edge as being on a model edge (we don't know
                 the model edge ID as yet) and continue */

              ME_Set_GEntDim(edge,1);
              ME_Set_GEntID(edge,0);
            }
            List_Delete(ebfaces);
          }

          /* Finished processing all neighbors of the face */
          List_Delete(fedges);
        }

        /* Now we have a list of faces which we believe constitutes a
           model face by itself. If this is the first subface (which
           means it could also be the entire model face originally
           considered), leave the model face tag as it is. If not,
           assign the faces in the subface a new model face ID */

        if (nsub != 0) {
          max_gface_id++;
          idx2 = 0;
          while ((subface = List_Next_Entry(subfaces,&idx2))) 
            MF_Set_GEntID(subface,max_gface_id);
        }
        nsub++;

        /* Done with this subface */

        idx2 = 0;
        while ((subface = List_Next_Entry(subfaces,&idx2))) {
          MEnt_Mark(subface,processedmk);
          MEnt_Unmark(subface,submk);
        }
        MSTK_FreeMarker(submk);
        List_Delete(subfaces);
      }

      List_Unmark(gffaces,processedmk);
      MSTK_FreeMarker(processedmk);
      List_Delete(gffaces);
    }
  
  } /* if use_geometry == 1 */

  free(gfids);
  free(gfregids);
       
  return 1;
}
  int MESH_ConcatSubMesh_Region(Mesh_ptr mesh, int num, Mesh_ptr *submeshes) {
    int nrf, nre, nrv, nfe, i, j, k, num_parbndry_verts, num_parbndry_edges, num_parbndry_faces, ival;
    MVertex_ptr mv, new_mv, sub_mv;
    MEdge_ptr me, new_me, sub_me;
    MFace_ptr mf, new_mf, sub_mf;
    MRegion_ptr new_mr, sub_mr;
    List_ptr mrfaces, mredges, mrverts, mfedges;
    int add_region, idx, global_id, iloc, *loc;
    double coor[3], rval;
    void *pval;
    Mesh_ptr submesh;

    List_ptr parbndry_verts = List_New(10);        
    List_ptr parbndry_edges = List_New(10);
    List_ptr parbndry_faces = List_New(10);

    MFace_ptr *rfaces = (MFace_ptr *) malloc(MAXPF3*sizeof(MFace_ptr));
    int *rfdirs = (int *) malloc(MAXPF3*sizeof(int));
    MEdge_ptr *fedges = (MEdge_ptr *) malloc(MAXPV2*sizeof(MEdge_ptr));
    int *fedirs = (int *) malloc(MAXPV2*sizeof(int));

    MAttrib_ptr parbndryatt = MAttrib_New(mesh, "on_parbndry", INT, MVERTEX);
    
    /* collect faces, edges and vertices on the partition boundary */
    idx = 0; num_parbndry_faces = 0;
    while ((mf = MESH_Next_Face(mesh,&idx))) 
      if (MF_PType(mf) != PINTERIOR) {
        List_Add(parbndry_faces,mf);
        num_parbndry_faces++;
      }
    idx = 0; num_parbndry_edges = 0;
    while ((me = MESH_Next_Edge(mesh,&idx))) 
      if (ME_PType(me) != PINTERIOR) {
        List_Add(parbndry_edges,me);
        num_parbndry_edges++;
      }
    idx = 0; num_parbndry_verts = 0;
    while ((mv = MESH_Next_Vertex(mesh,&idx)))
      if (MV_PType(mv) != PINTERIOR) {
        List_Add(parbndry_verts,mv);
        MEnt_Set_AttVal(mv, parbndryatt, 1, 0.0, NULL);
        num_parbndry_verts++;
      }
    
    /* sort based on global ID */
    List_Sort(parbndry_faces,num_parbndry_faces,sizeof(MFace_ptr),compareGlobalID);
    List_Sort(parbndry_edges,num_parbndry_edges,sizeof(MEdge_ptr),compareGlobalID);
    List_Sort(parbndry_verts,num_parbndry_verts,sizeof(MVertex_ptr),compareGlobalID);

    int *parbndry_vert_gids = (int *)malloc(num_parbndry_verts*sizeof(int));
    int *parbndry_edge_gids = (int *)malloc(num_parbndry_edges*sizeof(int));
    int *parbndry_face_gids = (int *)malloc(num_parbndry_faces*sizeof(int));

    /* store them in array for binary search */
    for (i = 0; i < num_parbndry_faces; i++) {
      mf = List_Entry(parbndry_faces,i);
      parbndry_face_gids[i] = MF_GlobalID(mf);
    }
    for (i = 0; i < num_parbndry_edges; i++) {
      me = List_Entry(parbndry_edges,i);
      parbndry_edge_gids[i] = ME_GlobalID(me);
    }
    for (i = 0; i < num_parbndry_verts; i++) {
      mv = List_Entry(parbndry_verts,i);
      parbndry_vert_gids[i] = MV_GlobalID(mv);
    }

   /* Make list of new edges and vertices which will be updated
       with each mesh that is concatenated */
    int max_vnew = 0, max_enew = 0, max_fnew = 0;
    for (i = 0; i < num; i++) {
      max_vnew += MESH_Num_Vertices(submeshes[i]);
      max_enew += MESH_Num_Edges(submeshes[i]);
      max_fnew += MESH_Num_Faces(submeshes[i]);
    }

    int num_new_verts = 0, num_new_edges = 0, num_new_faces = 0; 
    int *new_vert_gids = (int *) malloc(max_vnew*sizeof(int));
    int *new_edge_gids = (int *) malloc(max_enew*sizeof(int));
    int *new_face_gids = (int *) malloc(max_fnew*sizeof(int));

    List_ptr new_verts = List_New(max_vnew);
    List_ptr new_edges = List_New(max_enew);
    List_ptr new_faces = List_New(max_fnew);
  

    /* Now process each mesh and add a layer of ghost elements from
       each of them to the main partition */
       
    for (i = 0; i < num; i++) {
      submesh = submeshes[i];

      MAttrib_ptr vidatt = MAttrib_New(submesh, "tempvid", POINTER, MVERTEX);
      MAttrib_ptr eidatt = MAttrib_New(submesh, "tempeid", POINTER, MEDGE);
      MAttrib_ptr fidatt = MAttrib_New(submesh, "tempfid", POINTER, MFACE);

      idx = 0;
      while ((sub_mr = MESH_Next_Region(submesh, &idx))) {
        add_region = 0;

        /* Find matching vertices between submesh and main mesh */

        mrverts = MR_Vertices(sub_mr);
        nrv = List_Num_Entries(mrverts);
        for (j = 0; j < nrv; j++) {
          sub_mv = List_Entry(mrverts,j);

          MEnt_Get_AttVal(sub_mv, &vidatt, &ival, &rval, &mv);

          if (mv) {
            int on_parbndry=0;
            MEnt_Get_AttVal(mv, &parbndryatt, &on_parbndry, &rval, &pval);
            if (on_parbndry)
              add_region = 1; 
          } else {

            /* Does the global ID of this vertex of the sub mesh region
             * match the global ID of a boundary vertex in the main
             * mesh? */
            
            global_id = MV_GlobalID(sub_mv);
            loc = (int *) bsearch(&global_id, parbndry_vert_gids, num_parbndry_verts, sizeof(int),
                                  compareINT);
            if (loc) {
              add_region = 1; 
              iloc = loc - parbndry_vert_gids;
              mv = List_Entry(parbndry_verts,iloc); 
              /* here set the ghost vertex property, only necessary when the input submeshes are not consistent */
              if(MV_PType(mv) == PGHOST && MV_PType(sub_mv) != PGHOST) {
                MV_Set_GEntDim(mv,MV_GEntDim(sub_mv));
                MV_Set_GEntID(mv,MV_GEntID(sub_mv));
              }
              
              MEnt_Set_AttVal(sub_mv, vidatt, 0, 0.0, mv);
            }
          }
        }
        List_Delete(mrverts);

        /* Find matching edges between submesh and main mesh */

        mredges = MR_Edges(sub_mr);
        nre = List_Num_Entries(mredges);
        for (j = 0; j < nre; j++) {
          sub_me = List_Entry(mredges,j);
          
          /* Does the edge already have a counterpart in the main mesh? */
          MEnt_Get_AttVal(sub_me, eidatt, &ival, &rval, &me);

          if (!me) {
            /* Does the global ID of this edge of the sub mesh region
             * match the global ID of a boundary edge in the main
             * mesh? */
            
            global_id = ME_GlobalID(sub_me);
            loc = (int *) bsearch(&global_id, parbndry_edge_gids, num_parbndry_edges, sizeof(int),
                                  compareINT);
            if (loc) {
              add_region = 1; 
              iloc = loc - parbndry_edge_gids;
              me = List_Entry(parbndry_edges,iloc); 
              /* here set the ghost edge property, only necessary when the input submeshes are not consistent */
              if(ME_PType(me) == PGHOST && ME_PType(sub_me) != PGHOST) {
                ME_Set_GEntDim(me,ME_GEntDim(sub_me));
                ME_Set_GEntID(me,ME_GEntID(sub_me));
              }

              MEnt_Set_AttVal(sub_me, eidatt, 0, 0.0, me);
            }
          }
        }
        List_Delete(mredges);
          
        /* Find matching faces between submesh and main mesh */

        mrfaces = MR_Faces(sub_mr);
        nrf = List_Num_Entries(mrfaces);
        for (j = 0; j < nrf; j++) {
          sub_mf = List_Entry(mrfaces,j);

          MEnt_Get_AttVal(sub_mf, fidatt, &ival, &rval, &mf);

          if (!mf) {
            /* Does the global ID of this face of the sub mesh region
             * match the global ID of a boundary face in the main
             * mesh? */
            
            global_id = MF_GlobalID(sub_mf);
            loc = (int *) bsearch(&global_id, parbndry_face_gids, num_parbndry_faces, sizeof(int),
                                  compareINT);
            if (loc) {
              iloc = loc - parbndry_face_gids;
              mf = List_Entry(parbndry_faces,iloc); 
              /* here set the ghost edge property, only necessary when the input submeshes are not consistent */
              if (MF_PType(mf) == PGHOST && MF_PType(sub_mf) != PGHOST) {
                MF_Set_GEntDim(mf,MF_GEntDim(sub_mf));
                MF_Set_GEntID(mf,MF_GEntID(sub_mf));
              }

              MEnt_Set_AttVal(sub_mf, fidatt, 0, 0.0, mf);
            }
          }
        }

        if (!add_region) {
          List_Delete(mrfaces);
          continue;
        }
        
        new_mr = MR_New(mesh);                  /* add region */
        MR_Set_GEntDim(new_mr,MR_GEntDim(sub_mr));
        MR_Set_GEntID(new_mr,MR_GEntID(sub_mr));
        MR_Set_PType(new_mr,PGHOST);
        MR_Set_MasterParID(new_mr,MR_MasterParID(sub_mr));
        MR_Set_GlobalID(new_mr,MR_GlobalID(sub_mr));
	
        nrf = List_Num_Entries(mrfaces);
        int i2;
        for(i2 = 0; i2 < nrf; i2++) {
          sub_mf = List_Entry(mrfaces,i2);
          global_id = MF_GlobalID(sub_mf);
          rfdirs[i2] = MR_FaceDir_i(sub_mr,i2) == 1 ? 1 : 0;

          new_mf = NULL;
          MEnt_Get_AttVal(sub_mf, fidatt, &ival, &rval, &new_mf);

          if (!new_mf) {
            /* search in the ghost layer if another face with
             * this global ID has been added */
            loc = (int *) bsearch(&global_id, new_face_gids, num_new_faces,
                                  sizeof(int), compareINT);
            if (loc) {
              iloc = loc - new_face_gids;
              new_mf = List_Entry(new_faces, iloc);
              MEnt_Set_AttVal(sub_mf, fidatt, 0, 0.0, new_mf);
            }
          }

          if (new_mf) {
            List_ptr mfverts = MF_Vertices(sub_mf,1,0);
            int fvgid0[2];
            fvgid0[0] = MF_GlobalID(List_Entry(mfverts,0));
            fvgid0[1] = MF_GlobalID(List_Entry(mfverts,1));
            List_Delete(mfverts);

            mfverts = MF_Vertices(new_mf,1,0);
            int nfv = List_Num_Entries(mfverts);
            int fvgid1[MAXPV2];
            for (j = 0; j < nfv; j++)
              fvgid1[j] = MF_GlobalID(List_Entry(mfverts,j));
            List_Delete(mfverts);

            for (j = 0; j < nfv; j++) {
              if (fvgid1[j] == fvgid0[0]) {
                if (fvgid1[(j+nfv-1)%nfv] == fvgid0[1]) /* reverse dir */
                  rfdirs[i2] = !rfdirs[i2];
                break;
              }
            }                  
          }
          else {  /* add a new face to main mesh */
            new_mf = MF_New(mesh); /* add face */
            MF_Set_GEntDim(new_mf,MF_GEntDim(sub_mf));
            MF_Set_GEntID(new_mf,MF_GEntID(sub_mf));
            MF_Set_PType(new_mf,PGHOST);
            MF_Set_MasterParID(new_mf,MF_MasterParID(sub_mf));
            MF_Set_GlobalID(new_mf,MF_GlobalID(sub_mf));
	    
            MEnt_Set_AttVal(sub_mf, fidatt, 0, 0.0, new_mf);
            List_Add(new_faces, new_mf);
	    
            mfedges = MF_Edges(sub_mf,1,0);
            nfe = List_Num_Entries(mfedges);
            for(j = 0; j < nfe; j++) {
              sub_me = List_Entry(mfedges,j);
              global_id = ME_GlobalID(sub_me);
              
              fedirs[j] = MF_EdgeDir_i(sub_mf,j) == 1 ? 1 : 0;

              new_me = NULL;
              MEnt_Get_AttVal(sub_me, eidatt, &ival, &rval, &new_me);

              if (!new_me) {
                /* search in the ghost layer if another edge with
                 * this global ID has been added */
                loc = (int *) bsearch(&global_id, new_edge_gids, num_new_edges,
                                      sizeof(int), compareINT);
                if (loc) {
                  iloc = loc - new_edge_gids;
                  new_me = List_Entry(new_edges, iloc);
                  MEnt_Set_AttVal(sub_me, eidatt, 0, 0.0, new_me);
                }
              }
              
              if (new_me) {
                if(MV_GlobalID(ME_Vertex(new_me,0)) != MV_GlobalID(ME_Vertex(sub_me,0)))
                  fedirs[j] = 1 - fedirs[j];  /* if the edge dir is not the same, reverse the edge dir */
	      
              } else {  /* add a new edge to main mesh */
                new_me = ME_New(mesh);      /* add new edge and copy information */
                ME_Set_GEntDim(new_me,ME_GEntDim(sub_me));
                ME_Set_GEntID(new_me,ME_GEntID(sub_me));
                ME_Set_PType(new_me,PGHOST);
                ME_Set_MasterParID(new_me,ME_MasterParID(sub_me));
                ME_Set_GlobalID(new_me,ME_GlobalID(sub_me));
		
                MEnt_Set_AttVal(sub_me, eidatt, 0, 0.0, new_me);
                List_Add(new_edges, new_me);

                for(k = 0; k < 2; k++) {
                  sub_mv = ME_Vertex(sub_me,k);
                  global_id = MV_GlobalID(sub_mv);

                  new_mv = NULL;
                  MEnt_Get_AttVal(sub_mv, vidatt, &ival, &rval, &new_mv);

                  if (!new_mv) {
                    /* search in the ghost layer if another vertex with
                     * this global ID has been added */
                    loc = (int *) bsearch(&global_id, new_vert_gids, num_new_verts,
                                          sizeof(int), compareINT);
                    if (loc) {
                      iloc = loc - new_vert_gids;
                      new_mv = List_Entry(new_verts, iloc);
                      MEnt_Set_AttVal(sub_mv, vidatt, 0, 0.0, new_mv);
                    }
                  }
              
                  if (!new_mv) {  /* add new vertex to main mesh */
                    new_mv = MV_New(mesh);  /* add new vertex and copy information */
                    MV_Set_GEntDim(new_mv,MV_GEntDim(sub_mv));
                    MV_Set_GEntID(new_mv,MV_GEntID(sub_mv));
                    MV_Set_PType(new_mv,PGHOST);
                    MV_Set_MasterParID(new_mv,MV_MasterParID(sub_mv));
                    MV_Set_GlobalID(new_mv,MV_GlobalID(sub_mv));
                    MV_Coords(sub_mv,coor);
                    MV_Set_Coords(new_mv,coor);
		    
                    MEnt_Set_AttVal(sub_mv, vidatt, 0, 0.0, new_mv);
                    List_Add(new_verts, new_mv);
                  }
                  ME_Set_Vertex(new_me,k,new_mv);  /* set edge-vertex */
                }
              }							
              fedges[j] = new_me;
            }
            MF_Set_Edges(new_mf,nfe,fedges,fedirs); /* set face-edge */
            List_Delete(mfedges);
          }
          rfaces[i2] = new_mf;
        }
        MR_Set_Faces(new_mr,nrf,rfaces,rfdirs); /* set region-face */

        List_Delete(mrfaces);
      }

      idx = 0;
      while ((sub_mv = MESH_Next_Vertex(submesh, &idx)))
	MEnt_Rem_AttVal(sub_mv, vidatt);
      MAttrib_Delete(vidatt);
      idx = 0;
      while ((sub_me = MESH_Next_Edge(submesh, &idx)))
	MEnt_Rem_AttVal(sub_me, eidatt);
      MAttrib_Delete(eidatt);
      idx = 0;
      while ((sub_mf = MESH_Next_Face(submesh, &idx)))
	MEnt_Rem_AttVal(sub_mf, fidatt);
      MAttrib_Delete(fidatt);

      /* Sort the added entity lists by GlobalID */
      num_new_faces = List_Num_Entries(new_faces);
      List_Sort(new_faces, num_new_faces, sizeof(MFace_ptr), compareGlobalID);
      for (j = 0; j < num_new_faces; j++)
        new_face_gids[j] = MF_GlobalID(List_Entry(new_faces, j));

      num_new_edges = List_Num_Entries(new_edges);
      List_Sort(new_edges, num_new_edges, sizeof(MEdge_ptr), compareGlobalID);
      for (j = 0; j < num_new_edges; j++)
        new_edge_gids[j] = ME_GlobalID(List_Entry(new_edges, j));

      num_new_verts = List_Num_Entries(new_verts);
      List_Sort(new_verts, num_new_verts, sizeof(MVertex_ptr), compareGlobalID);
      for (j = 0; j < num_new_verts; j++)
        new_vert_gids[j] = MV_GlobalID(List_Entry(new_verts, j));
      
    }      

    idx = 0;
    while ((mv = List_Next_Entry(parbndry_verts, &idx)))
      MEnt_Rem_AttVal(mv, parbndryatt);
    MAttrib_Delete(parbndryatt);
    
    List_Delete(parbndry_faces);
    List_Delete(parbndry_edges);
    List_Delete(parbndry_verts);
    List_Delete(new_faces);
    List_Delete(new_edges);
    List_Delete(new_verts);

    free(parbndry_vert_gids);
    free(parbndry_edge_gids);
    free(parbndry_face_gids);
    free(new_face_gids);
    free(new_edge_gids);
    free(new_vert_gids);
    free(fedges);
    free(fedirs);
    free(rfaces);
    free(rfdirs);

    return 1;
  }
MFace_ptr MR_Split_with_EdgeLoop(MRegion_ptr rsplit, int nfe, MEdge_ptr *fedges) {
  Mesh_ptr mesh;
  int i, j, idx1, idx2, fedirs[MAXPV2], rfdir_adj, curdir, edir, edir_adj;;
  int gid, mkid, nrf1, nrf2, rfdirs1[MAXPF3], rfdirs2[MAXPF3];
  MEdge_ptr fe;
  MFace_ptr fnew, eface, rfarray1[MAXPF3], rfarray2[MAXPF3], curface;
  MRegion_ptr rnew[2];
  List_ptr felist, efaces;

#ifdef DEBUG
  List_ptr redges;
#endif

  gid = MR_GEntID(rsplit);

#ifdef DEBUG
  /* check to make sure we got meaningful input */
  redges = MR_Edges(rsplit);
  for (i = 0; i < nfe; i++)
    if (!List_Contains(redges,fedges[i]))
      MSTK_Report("MR_Split","Input edges are not part of the region boundary",
                  MSTK_FATAL);
  List_Delete(redges);
#endif

  mesh = MR_Mesh(rsplit);


  /* Fix a set of directions for the edges */

  fedirs[0] = 1;
  for (i = 1; i < nfe; i++) {
    MVertex_ptr vprev, v0, v1;

    vprev = ME_Vertex(fedges[i-1],fedirs[i-1]);
    v0 = ME_Vertex(fedges[i],0);
    v1 = ME_Vertex(fedges[i],1);
    if (vprev == v0)
      fedirs[i] = 1;
    else if (vprev == v1)
      fedirs[i] = 0;
    else
      MSTK_Report("MR_Split","Input edges do not form a loop as listed",
                  MSTK_FATAL);
  }

  /* Create the splitting face */

  fnew = MF_New(mesh);
  MF_Set_GEntDim(fnew,3);
  MF_Set_GEntID(fnew,gid);
  MF_Set_Edges(fnew,nfe,fedges,fedirs);


  /* Collect info for the first region */

  List_ptr processed_faces = List_New(0);

  rfarray1[0] = fnew;
  rfdirs1[0] = 1; 
  nrf1 = 1;
  List_Add(processed_faces,rfarray1[0]);

  i = 0;
  while (i < nrf1) {
    curface = rfarray1[i];
    curdir = rfdirs1[i];
    i++;

    /* Get adjacent faces in region of current face and if they are
       not already in the new region face list (not marked), then add
       them */
 
    felist = MF_Edges(curface,1,0);
    idx1 = 0; j = 0;
    while ((fe = List_Next_Entry(felist,&idx1))) {
      edir = MF_EdgeDir_i(curface,j);      
      j++;

      efaces = ME_Faces(fe);
      if (curface != fnew && List_Contains(efaces,fnew)) {
        /* we have come back to the starting or splitting face - don't
           go across this edge */
        List_Delete(efaces);
        continue;
      }

      /* Add an adjacent unprocessed face of the region to the list of 
       faces for the new region */
      idx2 = 0; 
      while ((eface = List_Next_Entry(efaces,&idx2))) { 
        if (eface == curface) continue;
        if (List_Contains(processed_faces,eface)) continue;
        if (!MR_UsesEntity(rsplit,eface,MFACE)) continue; /* does not belong to region */

        edir_adj = MF_EdgeDir(eface,fe);
        rfdir_adj = MR_FaceDir(rsplit,eface);

        /* add adjacent face based on the check that if two adjacent faces of
           region are used by the region in the same sense, then their common
           edge should be used by the two faces in opposite senses (or the opposite
           of both the conditions should be true) */

        if ((edir != edir_adj && curdir == rfdir_adj) ||
            (edir == edir_adj && curdir != rfdir_adj)) {
          rfarray1[nrf1] = eface;
          rfdirs1[nrf1] = rfdir_adj;
          List_Add(processed_faces,rfarray1[nrf1]);
          nrf1++;
          break;
        }
      }
      List_Delete(efaces);
    }
    List_Delete(felist);
  }


  /* collect info for the second region */

  rfarray2[0] = fnew;
  rfdirs2[0] = !rfdirs1[0];
  nrf2 = 1;
  List_Add(processed_faces,rfarray2[0]);
  
  i = 0;
  while (i < nrf2) {
    curface = rfarray2[i];
    curdir = rfdirs2[i];
    i++;

    /* Get adjacent faces in region of current face and if they are
       not already in the new region face list (not marked), then add
       them */
 
    felist = MF_Edges(curface,1,0);
    idx1 = 0; j = 0;
    while ((fe = List_Next_Entry(felist,&idx1))) {
      edir = MF_EdgeDir_i(curface,j);      
      j++;

      efaces = ME_Faces(fe);
      if (curface != fnew && List_Contains(efaces,fnew)) {
        /* we have come back to the starting or splitting face - don't
           go across this edge */
        List_Delete(efaces);
        continue;
      }

      
      /* Add an adjacent unprocessed face of the region to the list of 
       faces for the new region */
      idx2 = 0; 
      while ((eface = List_Next_Entry(efaces,&idx2))) { 
        if (eface == curface) continue;
        if (List_Contains(processed_faces,eface)) continue;
        if (!MR_UsesEntity(rsplit,eface,MFACE)) continue; /* does not belong to region */

        edir_adj = MF_EdgeDir(eface,fe);
        rfdir_adj = MR_FaceDir(rsplit,eface);

        /* add adjacent face based on the check that if two adjacent faces of
           region are used by the region in the same sense, then their common
           edge should be used by the two faces in opposite senses (or the opposite
           of both the conditions should be true) */

        if ((edir != edir_adj && curdir == rfdir_adj) ||
            (edir == edir_adj && curdir != rfdir_adj)) {
          rfarray2[nrf2] = eface;
          rfdirs2[nrf2] = rfdir_adj;
          List_Add(processed_faces,rfarray2[nrf2]);
          nrf2++;
          break;
        }
      }
      List_Delete(efaces);
    }
    List_Delete(felist);
  }

  /* Delete the original region */

  MR_Delete(rsplit,0);

  /* Make the two new regions */

  rnew[0] = MR_New(mesh);
  MR_Set_GEntDim(rnew[0],3);
  MR_Set_GEntID(rnew[0],gid);
  MR_Set_Faces(rnew[0],nrf1,rfarray1,rfdirs1);

  rnew[1] = MR_New(mesh);
  MR_Set_GEntDim(rnew[1],3);
  MR_Set_GEntID(rnew[1],gid);
  MR_Set_Faces(rnew[1],nrf2,rfarray2,rfdirs2);

  List_Delete(processed_faces);

  return fnew;
}
Exemple #5
0
  int MESH_WriteToFile(Mesh_ptr mesh, const char *filename, RepType rtype, MSTK_Comm comm) {
  FILE *fp;
  char mesg[80], attname[256];
  int i, j, k, idx;
  int gdim, gid;
  int mvid, mvid0, mvid1, mvid2, mrid2, meid, mfid, mrid;
  int nav, nar, nfe, nfv, nrf, nrv, dir=0;
  int nv, ne, nf, nr;
  int natt, ncomp, ival, nent;
  double xyz[3], rval, rdummy, *rval_arr;
  void *pval, *pdummy;
  MVertex_ptr mv, mv0, mv1, mv2;
  MEdge_ptr me;
  MFace_ptr mf;
  MRegion_ptr mr, mr2;
  List_ptr adjverts, mfedges, mfverts, mrfaces, mrverts, adjregs;
  RepType reptype;
  MAttrib_ptr attrib, vidatt, eidatt, fidatt, ridatt;
  MType attentdim;
  MAttType atttype;

  char modfilename[256];
  strcpy(modfilename, filename);
  
  int rank = 0, numprocs = 1;
#ifdef MSTK_HAVE_MPI
  if (comm) {
    MPI_Comm_size((MPI_Comm)comm, &numprocs);
    MPI_Comm_rank((MPI_Comm)comm, &rank);
  }
  if (numprocs > 1) {
    int ndigits = 0;
    int div = 1;
    while (numprocs/div) {div *= 10; ndigits++;}
    sprintf(modfilename,"%s.%d.%0*d",filename,numprocs,ndigits,rank);
  }
#endif
  
  if (!(fp = fopen(modfilename,"w"))) {
    sprintf(mesg,"Cannot open file %-s for writing",modfilename);
    MSTK_Report("MESH_WriteToFile",mesg,MSTK_ERROR);
    return 0;
  }

  if (rtype != UNKNOWN_REP) {
    reptype = rtype;
  }
  else {
    reptype = MESH_RepType(mesh);
  }

  nv = MESH_Num_Vertices(mesh);
  ne = MESH_Num_Edges(mesh);
  nf = MESH_Num_Faces(mesh);
  nr = MESH_Num_Regions(mesh);

  fprintf(fp,"MSTK %-2.1lf\n",MSTK_FILE_VER);
  fprintf(fp,"%s %d %d %d %d\n",
	  MESH_rtype_str[reptype], 
	  nv, 
	  (reptype >= R1 && reptype <= R4)?0:ne, 
	  (reptype >= R1 && reptype <= R2 && nr)?0:nf, 
	  nr);

  vidatt = MAttrib_New(mesh,"vidatt",INT,MVERTEX);
  eidatt = MAttrib_New(mesh,"eidatt",INT,MEDGE);
  fidatt = MAttrib_New(mesh,"fidatt",INT,MFACE);
  ridatt = MAttrib_New(mesh,"ridatt",INT,MREGION);

  idx = 0; i = 0;
  while ((mv = MESH_Next_Vertex(mesh,&idx)))
    MEnt_Set_AttVal(mv,vidatt,++i,0.0,NULL);

  idx = 0; i = 0;
  while ((me = MESH_Next_Edge(mesh,&idx)))
    MEnt_Set_AttVal(me,eidatt,++i,0.0,NULL);

  idx = 0; i = 0;
  while ((mf = MESH_Next_Face(mesh,&idx)))
    MEnt_Set_AttVal(mf,fidatt,++i,0.0,NULL);

  idx = 0; i = 0;
  while ((mr = MESH_Next_Region(mesh,&idx)))
    MEnt_Set_AttVal(mr,ridatt,++i,0.0,NULL);
  
  
  fprintf(fp,"vertices\n");
  idx = 0;
  while ((mv = MESH_Next_Vertex(mesh,&idx))) {

    MV_Coords(mv,xyz);

    gdim = MV_GEntDim(mv);
    gid = MV_GEntID(mv);

    fprintf(fp,"%24.16lf %24.16lf %24.16lf   %d %d\n",
	    xyz[0],xyz[1],xyz[2],gdim,gid);
    
  }

  if (reptype == R2 || reptype == R4) {
    fprintf(fp,"adjvertices\n");

    idx = 0;
    while ((mv = MESH_Next_Vertex(mesh,&idx))) {

      nav = MV_Num_AdjVertices(mv);
      fprintf(fp,"%d ",nav);
      
      adjverts = MV_AdjVertices(mv);
      for (j = 0; j < nav; j++) {
	mv2 = List_Entry(adjverts,j);
	MEnt_Get_AttVal(mv2,vidatt,&mvid2,&rval,&pval);
	fprintf(fp,"%d ",mvid2);
      }
      fprintf(fp,"\n");
      List_Delete(adjverts);
    }
  }



  if (reptype <= F4 && ne) {
    fprintf(fp,"edges\n");

    idx = 0;
    while ((me = MESH_Next_Edge(mesh,&idx))) {

      mv0 = ME_Vertex(me,0);
      MEnt_Get_AttVal(mv0,vidatt,&mvid0,&rval,&pval);
      mv1 = ME_Vertex(me,1);
      MEnt_Get_AttVal(mv1,vidatt,&mvid1,&rval,&pval);

      gdim = ME_GEntDim(me);
      gid = ME_GEntID(me);

      fprintf(fp,"%d %d \t%d %d\n",mvid0,mvid1,gdim,gid);
    }
  }



  if (reptype <= F4) {

    /* For full representations, always write out faces in terms of edges */

    fprintf(fp,"faces edge\n");
    
    idx = 0;
    while ((mf = MESH_Next_Face(mesh,&idx))) {
      
      nfe = MF_Num_Edges(mf);
      fprintf(fp,"%d ",nfe);
      
      mfedges = MF_Edges(mf,1,0);
      for (j = 0; j < nfe; j++) {
	me = List_Entry(mfedges,j);
	dir = MF_EdgeDir_i(mf,j);
	MEnt_Get_AttVal(me,eidatt,&meid,&rval,&pval);
	if (dir != 1) meid = -meid;
	fprintf(fp,"%d ",meid);
      }
      List_Delete(mfedges);
      
      gdim = MF_GEntDim(mf);
      /*
	gent = MF_GEntity(mf);
	gid = gent ? -99 : 0;
      */
      gid = MF_GEntID(mf);
      
      fprintf(fp,"\t%d %d\n",gdim,gid);
    }
  }
  else {

    /* For reduced representations, R3 and R4 always write out faces
       in terms of vertices. For reduced representations, R1 and R2
       write out faces in terms of vertices only when there are no
       regions (i.e. faces are the highest level mesh entities) */

    if ((reptype > R2) || (nr == 0)) {

      fprintf(fp,"faces vertex\n");

      idx = 0;
      while ((mf = MESH_Next_Face(mesh,&idx))) {
	
	nfv = MF_Num_Edges(mf);
	fprintf(fp,"%d ",nfv);
	
	mfverts = MF_Vertices(mf,1,0);
	for (j = 0; j < nfv; j++) {
	  mv = List_Entry(mfverts,j);
	  MEnt_Get_AttVal(mv,vidatt,&mvid,&rval,&pval);
	  fprintf(fp,"%d ",mvid);
	}
	List_Delete(mfverts);

	gdim = MF_GEntDim(mf);
	gid = MF_GEntID(mf);
	
	fprintf(fp,"\t%d %d\n",gdim,gid);
      }
    }
	
  }


  if (nr) {
    if (reptype <= F4 || reptype >= R2) {
      fprintf(fp,"regions face\n");

      idx = 0;
      while ((mr = MESH_Next_Region(mesh,&idx))) {

	nrf = MR_Num_Faces(mr);
	fprintf(fp,"%d ",nrf);

	mrfaces = MR_Faces(mr);
	for (j = 0; j < nrf; j++) {
	  mf = List_Entry(mrfaces,j);
	  dir = MR_FaceDir_i(mr,j);
	  MEnt_Get_AttVal(mf,fidatt,&mfid,&rval,&pval);
	  if (dir != 1) mfid = -mfid;
	  fprintf(fp,"%d ",mfid);
	}
	List_Delete(mrfaces);
	
	gdim = MF_GEntDim(mr);
	gid = MR_GEntID(mr);

	fprintf(fp,"\t%d %d\n",gdim,gid);
      }
    }
    else {
      fprintf(fp,"regions vertex\n");

      idx = 0;
      while ((mr = MESH_Next_Region(mesh,&idx))) {

	nrv = MR_Num_Vertices(mr);
	fprintf(fp,"%d ",nrv);

	mrverts = MR_Vertices(mr);
	for (j = 0; j < nrv; j++) {
	  mv = List_Entry(mrverts,j);
	  MEnt_Get_AttVal(mv,vidatt,&mvid,&rval,&pval);
	  fprintf(fp,"%d ",mvid);
	}
	List_Delete(mrverts);
	
	gdim = MR_GEntDim(mr);
	gid = MR_GEntID(mr);

	fprintf(fp,"\t%d %d\n",gdim,gid);
      }
    }

    if (reptype == R2 || reptype == R4) {
      fprintf(fp,"adjregions\n");
      
      idx = 0;
      while ((mr = MESH_Next_Region(mesh,&idx))) {

	nar = MR_Num_Faces(mr);
	fprintf(fp,"%d ",nar);

	adjregs = MR_AdjRegions(mr);

	for (j = 0; j < nar; j++) {
	  mr2 = List_Entry(adjregs,j);
	  if ((long) mr2 == -1) 
	    fprintf(fp,"%d ",0);
	  else {
	    MEnt_Get_AttVal(mr2,ridatt,&mrid2,&rval,&pval);
	    fprintf(fp,"%d ",mrid2);
	  }
	}
	fprintf(fp,"\n");
	List_Delete(adjregs);
      }
    }
  }


  /* Write out attributes if there are more than the 4 that we created 
    in this routine */


  if ((natt = MESH_Num_Attribs(mesh)) > 4) {

    fprintf(fp,"attributes\n");

    for (i = 0; i < natt; i++) {
      
      attrib = MESH_Attrib(mesh,i);

      /* Don't write out attribs we created for the internal use of 
	 this routine */
      if (attrib == vidatt || attrib == eidatt || attrib == fidatt || 
	  attrib == ridatt) continue;
      
      MAttrib_Get_Name(attrib,attname);

      atttype = MAttrib_Get_Type(attrib);
      if (atttype == POINTER) continue;  /* cannot write it out */

      ncomp = MAttrib_Get_NumComps(attrib);

      attentdim = MAttrib_Get_EntDim(attrib);


      /* First count how many entities actually have the attribute assigned */

      nent = 0;
      switch(attentdim) {
      case MVERTEX:
	idx = 0;
	while ((mv = MESH_Next_Vertex(mesh,&idx)))
	  if (MEnt_Get_AttVal(mv,attrib,&ival,&rval,&pval)) nent++;
	break;
      case MEDGE:
	idx = 0;
	while ((me = MESH_Next_Edge(mesh,&idx)))
	  if (MEnt_Get_AttVal(me,attrib,&ival,&rval,&pval)) nent++;
	break;
      case MFACE:
	idx = 0;
	while ((mf = MESH_Next_Face(mesh,&idx)))
	  if (MEnt_Get_AttVal(mf,attrib,&ival,&rval,&pval)) nent++;	    
	break;
      case MREGION: 
	idx = 0;
	while ((mr = MESH_Next_Region(mesh,&idx)))
	  if (MEnt_Get_AttVal(mr,attrib,&ival,&rval,&pval)) nent++;
	break;
      case MALLTYPE:
	idx = 0;
	while ((mv = MESH_Next_Vertex(mesh,&idx)))
	  if (MEnt_Get_AttVal(mv,attrib,&ival,&rval,&pval)) nent++;
	idx = 0;
	while ((me = MESH_Next_Edge(mesh,&idx)))
	  if (MEnt_Get_AttVal(me,attrib,&ival,&rval,&pval)) nent++;
	idx = 0;
	while ((mf = MESH_Next_Face(mesh,&idx)))
	  if (MEnt_Get_AttVal(mf,attrib,&ival,&rval,&pval)) nent++;	    
	idx = 0;
	while ((mr = MESH_Next_Region(mesh,&idx)))
	  if (MEnt_Get_AttVal(mr,attrib,&ival,&rval,&pval)) nent++;
	break;	
      default:
	break;
      } /* switch (attentdim) */


      /* No point in writing out attribute if no entity uses it! Or is there? */

      if (!nent) continue;



      fprintf(fp,"%-s\n",attname);

      switch(atttype) {
      case INT:
	fprintf(fp,"INT\n");
	break;
      case DOUBLE:
	fprintf(fp,"DOUBLE\n");
	break;
      case VECTOR:
	fprintf(fp,"VECTOR\n");
	break;
      case TENSOR:
	fprintf(fp,"TENSOR\n");
	break;
      default:
	MSTK_Report("MESH_WriteToFile",
		    "Unrecognizable or unprintable attribute type\n",MSTK_WARN);
	continue;	
      }

      fprintf(fp,"%-d\n",ncomp);

      switch(attentdim) {
      case MVERTEX:
	fprintf(fp,"MVERTEX\n");
	break;
      case MEDGE:
	fprintf(fp,"MEDGE\n");
	break;
      case MFACE:
	fprintf(fp,"MFACE\n");
	break;
      case MREGION:
	fprintf(fp,"MREGION\n");
	break;
      case MALLTYPE:
	fprintf(fp,"MALLTYPE\n");
	break;
      default:
	MSTK_Report("Mesh_WriteToFile","Unrecognized entity type",MSTK_WARN);
	break;
      }

      fprintf(fp,"%-d\n",nent);


      switch(attentdim) {
      case MVERTEX:
	idx = 0;
	while ((mv = MESH_Next_Vertex(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mv,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mv,vidatt,&mvid,&rdummy,&pdummy);
	    fprintf(fp,"0 %-d ",mvid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	break;
      case MEDGE:
	idx = 0;
	while ((me = MESH_Next_Edge(mesh,&idx))) {
	  if (MEnt_Get_AttVal(me,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(me,eidatt,&meid,&rdummy,&pdummy);
	    fprintf(fp,"1 %-d ",meid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	break;
      case MFACE:
	idx = 0;
	while ((mf = MESH_Next_Face(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mf,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mf,fidatt,&mfid,&rdummy,&pdummy);
	    fprintf(fp,"2 %-d ",mfid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	break;

      case MREGION: 
	idx = 0;
	while ((mr = MESH_Next_Region(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mr,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mr,ridatt,&mrid,&rdummy,&pdummy);
	    fprintf(fp,"3 %-d ",mrid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	break;

      case MALLTYPE:
	idx = 0;
	while ((mv = MESH_Next_Vertex(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mv,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mv,vidatt,&mvid,&rdummy,&pdummy);
	    fprintf(fp,"0 %-d ",mvid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	idx = 0;
	while ((me = MESH_Next_Edge(mesh,&idx))) {
	  if (MEnt_Get_AttVal(me,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(me,eidatt,&meid,&rdummy,&pdummy);
	    fprintf(fp,"1 %-d ",meid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	idx = 0;
	while ((mf = MESH_Next_Face(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mf,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mf,fidatt,&mfid,&rdummy,&pdummy);
	    fprintf(fp,"2 %-d ",mfid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	idx = 0;
	while ((mr = MESH_Next_Region(mesh,&idx))) {
	  if (MEnt_Get_AttVal(mr,attrib,&ival,&rval,&pval)) {
	    MEnt_Get_AttVal(mr,ridatt,&mrid,&rdummy,&pdummy);
	    fprintf(fp,"3 %-d ",mrid);
	    switch (atttype) {
	    case INT:
	      fprintf(fp," %-d",ival);
	      break;
	    case DOUBLE: 
	      fprintf(fp," %-lf ",rval);
	      break;
	    case VECTOR: case TENSOR:
	      rval_arr = (double *) pval;
	      for (k = 0; k < ncomp; k++)
		fprintf(fp," %-lf ",rval_arr[k]);
	      break;
	    default:
	      break;
	    }
	    fprintf(fp,"\n");
	  }
	}
	break;	
      default:
	break;
      } /* switch (attentdim) */

    } /* for (i = 0; i < natt) */
    
  } /* if (Mesh_Num_Attribs(mesh)) */
  

  idx = 0; i = 0;
  while ((mv = MESH_Next_Vertex(mesh,&idx)))
    MEnt_Rem_AttVal(mv,vidatt);

  idx = 0; i = 0;
  while ((me = MESH_Next_Edge(mesh,&idx)))
    MEnt_Rem_AttVal(me,eidatt);

  idx = 0; i = 0;
  while ((mf = MESH_Next_Face(mesh,&idx)))
    MEnt_Rem_AttVal(mf,fidatt);

  idx = 0; i = 0;
  while ((mr = MESH_Next_Region(mesh,&idx)))
    MEnt_Rem_AttVal(mr,ridatt);
  
  MAttrib_Delete(vidatt);
  MAttrib_Delete(eidatt);
  MAttrib_Delete(fidatt);
  MAttrib_Delete(ridatt);




  fclose(fp);

  return 1;
}
Exemple #6
0
MRegion_ptr MRs_Join(MRegion_ptr r1, MRegion_ptr r2, MFace_ptr f) {
  int i, j, nrf1, nrf2, gdim, gid, *rfdir2;
  MFace_ptr *rf2, fcmn=f;
  Mesh_ptr   mesh;
  List_ptr   rfaces2;


  mesh = MF_Mesh(r1);
  gid = MF_GEntID(r1);

  if (mesh != MF_Mesh(r2)) {
    MSTK_Report("MRs_Join","Regions not from same mesh",MSTK_ERROR);
    return 0;
  }
  else if (gid != MR_GEntID(r2)) {
    MSTK_Report("MRs_Join","Regions not from same geometric entity",MSTK_ERROR);
    return 0;
  }


  rfaces2 = MR_Faces(r2);
  nrf2 = List_Num_Entries(rfaces2);
  
  if (fcmn) {
    if (!MR_UsesEntity(r1,fcmn,MFACE)) {
      MSTK_Report("MRs_Join","Cannot find common face in region",MSTK_ERROR);
      return 0;
    }
  }
  else { /* find the common face */

    List_ptr rfaces1 = MR_Faces(r1);

    int idx = 0;
    MFace_ptr rf;
    while ((rf = List_Next_Entry(rfaces2,&idx))) {
      if (List_Contains(rfaces1,rf)) {
        fcmn = rf;
        break;
      }
    }

    List_Delete(rfaces1);

  }

  rf2 = (MFace_ptr) malloc(nrf2*sizeof(MFace_ptr));
  rfdir2 = (int *) malloc(nrf2*sizeof(int));

  int found;
  for (i = 0, j = 0, found = 0; i < nrf2; i++) {
    MFace_ptr rface = List_Entry(rfaces2,i);
    if (rface == fcmn) 
      found = 1;
    else {
      rf2[j] = rface;
      rfdir2[j] = MR_FaceDir_i(r2,i);
      j++;
    }
  }
  List_Delete(rfaces2);

  if (!found) {
    MSTK_Report("MRs_Join","Cannot find common face in region",MSTK_ERROR);
    return 0;
  }

  MR_Delete(r2,0);

  MR_Replace_Faces(r1,1,&fcmn,nrf2-1,rf2,rfdir2);
  
  MF_Delete(fcmn,0);

  free(rf2); free(rfdir2);

  return r1;
}
  int MESH_Send_NonVertexEntities_FN(Mesh_ptr mesh, int torank, MSTK_Comm comm,
                           int *numreq, int *maxreq, MPI_Request **requests,
                           int *numptrs2free, int *maxptrs2free,
                           void ***ptrs2free) {
    int i, j, nv, ne, nf, nr;
    int nevs, nfes, nrfs, nfe, nrv, nrf, dir;
    int maxnfe, maxnrf;
    int *mesh_info;
    int *list_edge=NULL, *list_face=NULL, *list_region=NULL;
    MVertex_ptr mv;
    MEdge_ptr me;
    MFace_ptr mf;
    MRegion_ptr mr;
    List_ptr mfedges, mrfaces, mrverts;
    RepType rtype;
    double coor[3];
    MPI_Request mpirequest;

    if (requests == NULL)
      MSTK_Report("MESH_Surf_SendMesh","MPI requests array is NULL",MSTK_FATAL);

    if (*maxreq == 0) {
      *maxreq = 25;
      *requests = (MPI_Request *) malloc(*maxreq*sizeof(MPI_Request));
      *numreq = 0;
    }
    else if (*maxreq < (*numreq) + 13) {
      *maxreq = 2*(*maxreq) + 11;
      *requests = (MPI_Request *) realloc(*requests,*maxreq*sizeof(MPI_Request));
    }
  

    ne = MESH_Num_Edges(mesh);
    nf = MESH_Num_Faces(mesh);
    nr = MESH_Num_Regions(mesh);

    /* some other known quantitites - 5 items per edge (2 for verts
       and 3 for extra data), maxnfe+4 items per face (1 for number of
       edges, maxnfe for edge indices, anad 3 for extra data),
       maxnrf+4 items per region (1 for number of faces, maxnrf for
       face indices and 3 for extra data */


    maxnfe = 0;
    for (i = 0; i < nf; i++) {
      mf = MESH_Face(mesh,i);
      nfe = MF_Num_Edges(mf);
      if (nfe > maxnfe)
        maxnfe = nfe;
    }

    maxnrf = 0;
    for (i = 0; i < nr; i++) {
      mr = MESH_Region(mesh,i);
      nrf = MR_Num_Faces(mr);
      if (nrf > maxnrf)
        maxnrf = nrf;
    }

    // The amount of extra info we are sending and their meaning is obviously
    // known on the receiving side too. So nevs, nfes and nrfs can be 
    // calculated without us sending it


    nevs = (2+3)*ne;    
    nfes = (1 + maxnfe + 3)*nf;
    nrfs = (1 + maxnrf + 3)*nr;
    
    /* Reserve nevs spots for each edge */

    list_edge = (int *) malloc(5*ne*sizeof(int));

    nevs = 0;

    /* Store the vertex ids, then the 3 auxilliary data fields */

    for(i = 0; i < ne; i++) {
      me = MESH_Edge(mesh,i);
      list_edge[nevs]   = MV_ID(ME_Vertex(me,0));
      list_edge[nevs+1] = MV_ID(ME_Vertex(me,1));
      list_edge[nevs+2] = (ME_GEntID(me)<<3) | (ME_GEntDim(me));
      list_edge[nevs+3] = (ME_MasterParID(me) <<3) | (ME_OnParBoundary(me)<<2) | (ME_PType(me));
      list_edge[nevs+4] = ME_GlobalID(me);
      nevs += 5;
    }

    /* send detailed edge info */

    MPI_Isend(list_edge,nevs,MPI_INT,torank,torank,comm,&mpirequest);
    (*requests)[*numreq] = mpirequest;
    (*numreq)++;
  

    /* Reserve nfes spots for each face */

    list_face = (int *) malloc(nfes*sizeof(int));

    nfes = 0;

    /* first store nfe, then the edge ids, then the 3 auxilliary data fields */

    for(i = 0; i < nf; i++) {
      mf = MESH_Face(mesh,i);
      mfedges = MF_Edges(mf,1,0);
      nfe = List_Num_Entries(mfedges);
      list_face[nfes] = nfe;
      for(j = 0; j < nfe; j++) {
        dir = MF_EdgeDir_i(mf,j) ? 1 : -1;
        list_face[nfes+j+1] = dir*ME_ID(List_Entry(mfedges,j));
      }
      list_face[nfes+nfe+1] = (MF_GEntID(mf)<<3) | (MF_GEntDim(mf));
      list_face[nfes+nfe+2] = (MF_MasterParID(mf)<<3) | (MF_OnParBoundary(mf)<<2) | (MF_PType(mf));
      list_face[nfes+nfe+3] = MF_GlobalID(mf);
      nfes += (nfe + 4);
      List_Delete(mfedges);
    }


    /* send detailed face info */

    MPI_Isend(list_face,nfes,MPI_INT,torank,torank,comm,&mpirequest);
    (*requests)[*numreq] = mpirequest;
    (*numreq)++;

    
    if (nr) {

      list_region = (int *) malloc(nrfs*sizeof(int));
      
      nrfs = 0;
      
      /* first store nrf, then the face ids, then the 3 auxilliary data fields */
      
      for(i = 0; i < nr; i++) {
        mr = MESH_Region(mesh,i);
        mrfaces = MR_Faces(mr);
        nrf = List_Num_Entries(mrfaces);
        list_region[nrfs] = nrf;
        for(j = 0; j < nrf; j++) {
          dir = MR_FaceDir_i(mr,j) == 1 ? 1 : -1;
          list_region[nrfs+j+1] = dir*MF_ID(List_Entry(mrfaces,j));
        }
        list_region[nrfs+nrf+1] = (MR_GEntID(mr)<<3) | (MR_GEntDim(mr));
        list_region[nrfs+nrf+2] = (MR_MasterParID(mr)<<3) | (MR_PType(mr)); /* MR_PType is 2 bits; 3 bit is 0 */
        list_region[nrfs+nrf+3] = MR_GlobalID(mr);
        nrfs += (nrf + 4);
        List_Delete(mrfaces);
      }
      
      /* send detailed region info */
      
      MPI_Isend(list_region,nrfs,MPI_INT,torank,torank,comm,&mpirequest);
      (*requests)[*numreq] = mpirequest;
      (*numreq)++;
      
    }
      

    /* collect allocated memory so it can be freed in a higher level
       routine after MPI_Waitall or MPI_Test has ensured that the send
       has been completed */

    if (ptrs2free == NULL) 
      MSTK_Report("MESH_Surf_SendMesh_FN","ptrs2free array is NULL",MSTK_FATAL);

    int nptrs = 3;

    if (*maxptrs2free == 0) {
      *maxptrs2free = 25;
      *ptrs2free = (void **) malloc(*maxptrs2free*sizeof(void *));
      *numptrs2free = 0;
    }
    else if (*maxptrs2free < (*numptrs2free) + nptrs) {
      *maxptrs2free = 2*(*maxptrs2free) + nptrs;
      *ptrs2free = (void **) realloc(*ptrs2free,(*maxptrs2free)*sizeof(void *));
    }

    if (ne)
      (*ptrs2free)[(*numptrs2free)++] = list_edge;
    if (nf)
      (*ptrs2free)[(*numptrs2free)++] = list_face;
    if (nr)
      (*ptrs2free)[(*numptrs2free)++] = list_region;

    return 1;
  }