exgsnl.c

一个用来实现偏微分方程中网格的计算库

                            &num_elem_in_blk,
                            &num_nodes_per_elem,
                            &num_attr)) == -1)
    {
      free(elem_blk_parms);
      free(elem_blk_ids);
      free(ss_elem_ndx);
      free(side_set_side_list);
      free(side_set_elem_list);
      sprintf(errmsg,
             "Error: failed to get element block %d parameters in file id %d",
              elem_blk_ids[i], exoid);
      ex_err("ex_get_side_set_node_list_len",errmsg,EX_MSG);
      return(EX_FATAL);
    }

    elem_blk_parms[i].num_elem_in_blk = num_elem_in_blk;
    elem_blk_parms[i].num_nodes_per_elem = num_nodes_per_elem;
    elem_blk_parms[i].num_attr = num_attr;
    elem_blk_parms[i].elem_blk_id = elem_blk_ids[i];

    for (m=0; m < strlen(elem_type); m++)
      elem_blk_parms[i].elem_type[m] = toupper(elem_type[m]);
    elem_blk_parms[i].elem_type[m] = NULL_ELEMENT;

    if (strncmp(elem_blk_parms[i].elem_type,"CIRCLE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = CIRCLE;
      /* set side set node stride */
        elem_blk_parms[i].num_nodes_per_side[0] = 1;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"SPHERE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = SPHERE;
      /* set side set node stride */
        elem_blk_parms[i].num_nodes_per_side[0] = 1;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"QUAD",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = QUAD;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side[0] = 2;
      else if (elem_blk_parms[i].num_nodes_per_elem == 5)
        elem_blk_parms[i].num_nodes_per_side[0] = 2;
      else 
        elem_blk_parms[i].num_nodes_per_side[0] = 3;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"TRIANGLE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = TRIANGLE;
      /* determine side set node stride */
      if (ndim == 2) /* 2d TRIs */
      {
        if (elem_blk_parms[i].num_nodes_per_elem == 3)
          elem_blk_parms[i].num_nodes_per_side[0] = 2;
        else 
          elem_blk_parms[i].num_nodes_per_side[0] = 3;
      }
      else if (ndim == 3)  /* 3d TRIs */
      {   /* set the default number of nodes per side; catch exceptions later */
        if (elem_blk_parms[i].num_nodes_per_elem == 3)
          elem_blk_parms[i].num_nodes_per_side[0] = 3;
        else 
          elem_blk_parms[i].num_nodes_per_side[0] = 6;
      }
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"SHELL",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = SHELL;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2) /* KLUDGE for 2D Shells*/
        elem_blk_parms[i].num_nodes_per_side[0] = 2;
      else if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else
        elem_blk_parms[i].num_nodes_per_side[0] = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"HEX",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = HEX;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 8)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 9)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 12) /* HEXSHELL */
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 27)
        elem_blk_parms[i].num_nodes_per_side[0] = 9;
      else
        elem_blk_parms[i].num_nodes_per_side[0] = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"TETRA",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = TETRA;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side[0] = 3;
      else if (elem_blk_parms[i].num_nodes_per_elem == 8)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else
        elem_blk_parms[i].num_nodes_per_side[0] = 6;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"WEDGE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = WEDGE;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 6)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else
        elem_blk_parms[i].num_nodes_per_side[0] = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"PYRAMID",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = PYRAMID;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 5)
        elem_blk_parms[i].num_nodes_per_side[0] = 4;
      else
        elem_blk_parms[i].num_nodes_per_side[0] = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"BEAM",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = BEAM;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2)
        elem_blk_parms[i].num_nodes_per_side[0] = 2;
      else 
        elem_blk_parms[i].num_nodes_per_side[0] = 3;
    }
    else if ( (strncmp(elem_blk_parms[i].elem_type,"TRUSS",3) == 0) ||
              (strncmp(elem_blk_parms[i].elem_type,"BAR",3) == 0)  ||
              (strncmp(elem_blk_parms[i].elem_type,"EDGE",3) == 0))
    {
      elem_blk_parms[i].elem_type_val = TRUSS;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2)
        elem_blk_parms[i].num_nodes_per_side[0] = 2;
      else 
        elem_blk_parms[i].num_nodes_per_side[0] = 3;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"NULL",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = NULL_ELEMENT;
      elem_blk_parms[i].num_nodes_per_side[0] = 0;
      elem_blk_parms[i].num_elem_in_blk = 0;
    }
    else
    { /* unsupported element type; no problem if no sides specified for
         this element block */
      elem_blk_parms[i].elem_type_val = UNK;
      elem_blk_parms[i].num_nodes_per_side[0] = 0;
    }

    elem_ctr += elem_blk_parms[i].num_elem_in_blk;
    elem_blk_parms[i].elem_ctr = elem_ctr;      /* save elem number max */
  }

/* Walk through element list and keep a running count of the node length */

  *side_set_node_list_len = 0;
  for (i=0;i<tot_num_ss_elem;i++)
  {
    for (j=0; j<num_elem_blks; j++)
    {
      if (elem_blk_parms[j].elem_type_val != NULL_ELEMENT)
        if (side_set_elem_list[i] <= elem_blk_parms[j].elem_ctr)
          break; /* stop because we found the parameters for this element */
    }
    if (j >= num_elem_blks)
    {
      exerrval = EX_BADPARAM;
      sprintf(errmsg,
             "Error: Invalid element number %d found in side set %d in file %d",
              side_set_elem_list[i], side_set_id, exoid);
      free(elem_blk_parms);
      free(elem_blk_ids);
      free(ss_elem_ndx);
      free(side_set_side_list);
      free(side_set_elem_list);
      ex_err("ex_get_side_set_node_list_len",errmsg,EX_MSG);
      return (EX_FATAL);
    }

    /* Update *side_set_node_list_len (which points to next node in chain */

    /* WEDGEs with 3 node sides (side 4 or 5) are special cases */
    if (elem_blk_parms[j].elem_type_val == WEDGE &&
        (side_set_side_list[i] == 4 || side_set_side_list[i] == 5))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 6)
        *side_set_node_list_len += 3;  /* 3 node side */
      else
        *side_set_node_list_len += 6;  /* 6 node side */
    }
    /* PYRAMIDSs with 3 node sides (sides 1,2,3,4) are also special */
    else if (elem_blk_parms[j].elem_type_val == PYRAMID &&
             (side_set_side_list[i] < 5))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 5)
        *side_set_node_list_len += 3;  /* 3 node side */
      else
        *side_set_node_list_len += 6;  /* 6 node side */
    }
    /* side numbers 3,4,5,6 for SHELLs are also special */
    else if (elem_blk_parms[j].elem_type_val == SHELL &&
        (side_set_side_list[i] > 2 ))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 4)
        *side_set_node_list_len += 2;  /* 2 node side */
      else
        *side_set_node_list_len += 3;  /* 3 node side */
    }
    /* sides 3, 4, and 5 of 3d TRIs are special cases */
    else if (elem_blk_parms[j].elem_type_val == TRIANGLE &&
             ndim == 3 &&
             side_set_side_list[i] > 2 )
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 3)  /* 3-node TRI */
        *side_set_node_list_len += 2;  /* 2 node side */
      else  /* 6-node TRI */
        *side_set_node_list_len += 3;  /* 3 node side */
    }
    else if (elem_blk_parms[j].elem_type_val == UNK)
    {
      exerrval = EX_BADPARAM;
      sprintf(errmsg,
             "Error: %s in elem block %d is an unsupported element type",
              elem_blk_parms[i].elem_type, elem_blk_parms[i].elem_blk_id);
      free(elem_blk_parms);
      free(elem_blk_ids);
      free(ss_elem_ndx);
      free(side_set_side_list);
      free(side_set_elem_list);
      ex_err("ex_get_side_set_node_list_len",errmsg,EX_MSG);
      return (EX_FATAL);
    }
    else /* all other element types */
      *side_set_node_list_len += elem_blk_parms[j].num_nodes_per_side[0];
  }

  /* All done: release element block ids array,
     element block parameters array, and side set element index array */
  free(elem_blk_ids);
  free(elem_blk_parms);
  free(ss_elem_ndx);
  free(side_set_side_list);
  free(side_set_elem_list);

  return(EX_NOERR);
}