GmshUtil.cpp

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/**
 * MOAB, a Mesh-Oriented datABase, is a software component for creating,
 * storing and accessing finite element mesh data.
 *
 * Copyright 2004 Sandia Corporation. Under the terms of Contract
 * DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government
 * retains certain rights in this software.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 */
 
#include "GmshUtil.hpp"
 
namespace moab
{
 
// Indexed by position in Gmsh order, containing cooresponding
// position in MOAB order.
const int hex_27_node_order[] = { 0, 1, 2, 3, 4, 5, 6, 7, // corners
 8, 11, 12, 9, 13, 10, 14, 15, 16, 19, 17, 18, // edges
 24, 20, 23, 21, 22, 25, // faces
 26 }; // volume
 
const int tet_10_node_order[] = { 0, 1, 2, 3, 4, 5, 6, 7, 9, 8 };
 
// Indexed by position in MOAB order, containing cooresponding
// position in Gmsh order.
const int pri_15_node_order[] = {
 0, 1, 2, 3, 4, 5, // corners
 6, 8, 9, 7, 10, 11, 12, 14, 13 // edges
};
const int pyr_13_node_order[] = {
 0, 1, 2, 3, 4, // corners
 5, 8, 9, 6, 10, 7, 11, 12 // edges
};
 
// List of GmshElemType structs, indexed by the VTK type number.
const GmshElemType GmshUtil::gmshElemTypes[] = {
 { 0, 0, MBMAXTYPE, 0, 0 },
 { "line", 1, MBEDGE, 2, 0 },
 { "triangle", 2, MBTRI, 3, 0 },
 { "quadrangle", 3, MBQUAD, 4, 0 },
 { "tetrahedron", 4, MBTET, 4, 0 },
 { "hexahedron", 5, MBHEX, 8, 0 },
 { "prism", 6, MBPRISM, 6, 0 },
 { "pyramid", 7, MBPYRAMID, 5, 0 },
 { "2nd order line", 8, MBEDGE, 3, 0 },
 { "2nd order triangle", 9, MBTRI, 6, 0 },
 { "2nd order quadrangle", 10, MBQUAD, 9, 0 },
 { "2nd order tetrahedron", 11, MBTET, 10, tet_10_node_order },
 { "2nd order hexahedron", 12, MBHEX, 27, hex_27_node_order },
 { "2nd order prism", 13, MBMAXTYPE, 0, 0 }, // prism w/ mid-face nodes on quads but not tris
 { "2nd order pyramid", 14, MBMAXTYPE, 0, 0 }, // pyramid w/ mid-face nodes on quad but not tris
 { "point", 15, MBVERTEX, 1, 0 }, // point element (0-rad sphere element?) // will be skipped
 { "2nd order quadrangle", 16, MBQUAD, 8, 0 },
 { "2nd order hexahedron", 17, MBHEX, 20, hex_27_node_order },
 { "2nd order prism", 18, MBPRISM, 15, pri_15_node_order },
 { "2nd order pyramid", 19, MBPYRAMID, 13, pyr_13_node_order },
 { "3rd order triangle", 20, MBMAXTYPE, 0, 0 }, // triangle w/ 2 nodes per edge
 { "3rd order triangle", 21, MBMAXTYPE, 0, 0 }, // " " " " " " and mid-face node
 { "4th order triangle", 22, MBMAXTYPE, 0, 0 }, // triangle w/ 3 nodes per edge
 { "4th order triangle", 23, MBMAXTYPE, 0, 0 }, // " " " " " " and 3 mid-face nodes
 { "5th order triangle", 24, MBMAXTYPE, 0, 0 }, // triangle w/ 4 nodes per edge
 { "5th order triangle", 25, MBMAXTYPE, 0, 0 }, // " " " " " " and 6 mid-face nodes
 { "3rd order edge", 26, MBMAXTYPE, 0, 0 }, // 4-node edge
 { "4th order edge", 27, MBMAXTYPE, 0, 0 }, // 5-node edge
 { "5th order edge", 28, MBMAXTYPE, 0, 0 }, // 6-node edge
 { "3rd order tetrahedron", 29, MBMAXTYPE, 0, 0 }, // tet w/ 2 nodes per edge and 1 per face
 { "4th order tetrahedron", 30, MBMAXTYPE, 0, 0 }, // tet w/ 3 nodes per edge, 3 per face, and 1 mid-voluem
 { "5th order tetrahedron", 31, MBMAXTYPE, 0, 0 }, // tet w/ 4 nodes per edge, 6 per face, and 4 mid-voluem
 { 0, 32, MBMAXTYPE, 0, 0 } };
 
const unsigned GmshUtil::numGmshElemType = sizeof( GmshUtil::gmshElemTypes ) / sizeof( GmshUtil::gmshElemTypes[0] );
 
// Define an array, indexed by EntityType and number of nodes,
// containing the corresponding Gmsh element type.
#define TWENTYEIGHT_ZEROS \
 { \
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \
 }
const int MAX_NODES = 28;
const int mb_to_gmsh_type[][MAX_NODES] = {
 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
 TWENTYEIGHT_ZEROS, // MBVERTEX
 { 0, 0, 1, 8, 26, 27, 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // MBEDGE
 { 0, 0, 0, 2, 0, 0, 9, 0, 0, 20, 21, 0, 22, 0, 0, 23, 0, 0, 0, 0, 0, 25, 0, 0, 0, 0, 0, 0 }, // MBTRI
 { 0, 0, 0, 0, 3, 0, 0, 0, 16, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // MBQUAD
 TWENTYEIGHT_ZEROS, // MBPOLYGON
 { 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 29, 0, 0, 0, 0, 0, 0, 0 }, // MBTET
 { 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 19, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // MBPYRAMID
 { 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 18, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // MBWEDGE
 TWENTYEIGHT_ZEROS, // MBKNIFE
 { 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 0, 0, 0, 12 }, // MBHEX
 TWENTYEIGHT_ZEROS, // MBPOLYHEDRON
 TWENTYEIGHT_ZEROS, // MBENTITYSET
 TWENTYEIGHT_ZEROS }; // MBMAXTYPE
 
int GmshUtil::get_gmsh_type( EntityType type, unsigned num_nodes )
{
 if( num_nodes >= (unsigned)MAX_NODES ) return -1;
 
 int idx = mb_to_gmsh_type[type][num_nodes];
 if( !idx ) return -1;
 
 return gmshElemTypes[idx].mb_type == MBMAXTYPE ? -1 : idx;
}
 
} // namespace moab