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Adding Gmsh v2.xx Mesh Export Capability - Currently upto 2nd Order Triangles, Quadrangles and Tetrahedra
This commit is contained in:
Philippose Rajan
parent
00bc4a1220
commit
af9d554ecb
@ -6,6 +6,6 @@ noinst_LTLIBRARIES = libinterface.la
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libinterface_la_SOURCES = read_fnf_mesh.cpp readtetmesh.cpp readuser.cpp writeabaqus.cpp writediffpack.cpp \
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writedolfin.cpp writeelmer.cpp writefeap.cpp writefluent.cpp writegmsh.cpp writejcm.cpp \
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writepermas.cpp writetecplot.cpp writetet.cpp writetochnog.cpp writeuser.cpp \
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wuchemnitz.cpp
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wuchemnitz.cpp writegmsh2.cpp
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261
libsrc/interface/writegmsh2.cpp
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261
libsrc/interface/writegmsh2.cpp
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@ -0,0 +1,261 @@
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/*! \file writegmsh2.cpp
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* \brief Export Netgen Mesh in the GMSH v2.xx File format
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* \author Philippose Rajan
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* \date 02 November 2008
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*
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* This function extends the export capabilities of
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* Netgen to include the GMSH v2.xx File Format.
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*
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* Current features of this function include:
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*
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* 1. Exports Triangles, Quadrangles and Tetrahedra \n
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* 2. Supports upto second order elements of each type
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*
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*/
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#include <mystdlib.h>
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#include <myadt.hpp>
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#include <linalg.hpp>
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#include <csg.hpp>
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#include <meshing.hpp>
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namespace netgen
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{
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#include "writeuser.hpp"
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// Mapping of entities from Netgen definitions to GMSH definitions
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enum GMSH_ELEMENTS {GMSH_TRIG = 2, GMSH_TRIG6 = 9,
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GMSH_QUAD = 3, GMSH_QUAD8 = 16,
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GMSH_TET = 4, GMSH_TET10 = 11};
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const int triGmsh[7] = {0,1,2,3,6,4,5};
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const int quadGmsh[9] = {0,1,2,3,4,5,8,6,7};
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const int tetGmsh[11] = {0,1,2,3,4,5,8,6,7,10,9};
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/*! GMSH v2.xx mesh format export function
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*
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* This function extends the export capabilities of
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* Netgen to include the GMSH v2.xx File Format.
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*
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* Current features of this function include:
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*
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* 1. Exports Triangles, Quadrangles and Tetrahedra \n
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* 2. Supports upto second order elements of each type
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*
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*/
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void WriteGmsh2Format (const Mesh & mesh,
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const CSGeometry & geom,
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const string & filename)
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{
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ofstream outfile (filename.c_str());
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outfile.precision(6);
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outfile.setf (ios::fixed, ios::floatfield);
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outfile.setf (ios::showpoint);
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int np = mesh.GetNP(); /// number of points in mesh
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int ne = mesh.GetNE(); /// number of 3D elements in mesh
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int nse = mesh.GetNSE(); /// number of surface elements (BC)
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int i, j, k, l;
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/*
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* 3D section : Volume elements (currently only tetrahedra)
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*/
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if ((ne > 0)
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&& (mesh.VolumeElement(1).GetNP() <= 10)
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&& (mesh.SurfaceElement(1).GetNP() <= 6))
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{
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cout << "Write GMSH v2.xx Format \n";
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cout << "The GMSH v2.xx export is currently available for elements upto 2nd Order\n" << endl;
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int inverttets = mparam.inverttets;
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int invertsurf = mparam.inverttrigs;
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/// Prepare GMSH 2.0 file (See GMSH 2.0 Documentation)
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outfile << "$MeshFormat\n";
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outfile << (float)2.0 << " "
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<< (int)0 << " "
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<< (int)sizeof(double) << "\n";
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outfile << "$EndMeshFormat\n";
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/// Write nodes
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outfile << "$Nodes\n";
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outfile << np << "\n";
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for (i = 1; i <= np; i++)
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{
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const Point3d & p = mesh.Point(i);
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outfile << i << " "; /// node number
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outfile << p.X() << " ";
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outfile << p.Y() << " ";
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outfile << p.Z() << "\n";
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}
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outfile << "$EndNodes\n";
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/// write elements (both, surface elements and volume elements)
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outfile << "$Elements\n";
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outfile << ne + nse << "\n"; //// number of elements + number of surfaces BC
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for (i = 1; i <= nse; i++)
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{
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int elType = 0;
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Element2d el = mesh.SurfaceElement(i);
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if(invertsurf) el.Invert();
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if(el.GetNP() == 3) elType = GMSH_TRIG; //// GMSH Type for a 3 node triangle
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if(el.GetNP() == 6) elType = GMSH_TRIG6; //// GMSH Type for a 6 node triangle
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if(elType == 0)
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{
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cout << " Invalid surface element type for Gmsh 2.0 3D-Mesh Export Format !\n";
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return;
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}
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outfile << i;
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outfile << " ";
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outfile << elType;
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outfile << " ";
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outfile << "2"; //// Number of tags (2 => Physical and elementary entities)
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outfile << " ";
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outfile << mesh.GetFaceDescriptor (el.GetIndex()).BCProperty() << " ";
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/// that means that physical entity = elementary entity (arbitrary approach)
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outfile << mesh.GetFaceDescriptor (el.GetIndex()).BCProperty() << " ";
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for (j = 1; j <= el.GetNP(); j++)
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{
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outfile << " ";
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outfile << el.PNum(triGmsh[j]);
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}
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outfile << "\n";
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}
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for (i = 1; i <= ne; i++)
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{
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int elType = 0;
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Element el = mesh.VolumeElement(i);
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if (inverttets) el.Invert();
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if(el.GetNP() == 4) elType = GMSH_TET; //// GMSH Element type for 4 node tetrahedron
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if(el.GetNP() == 10) elType = GMSH_TET10; //// GMSH Element type for 10 node tetrahedron
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if(elType == 0)
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{
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cout << " Invalid volume element type for Gmsh 2.0 3D-Mesh Export Format !\n";
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return;
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}
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outfile << nse + i; //// element number (Remember to add on surface elements)
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outfile << " ";
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outfile << elType;
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outfile << " ";
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outfile << "2"; //// Number of tags (2 => Physical and elementary entities)
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outfile << " ";
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outfile << 100000 + el.GetIndex();
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/// that means that physical entity = elementary entity (arbitrary approach)
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outfile << " ";
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outfile << 100000 + el.GetIndex(); /// volume number
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outfile << " ";
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for (j = 1; j <= el.GetNP(); j++)
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{
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outfile << " ";
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outfile << el.PNum(tetGmsh[j]);
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}
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outfile << "\n";
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}
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outfile << "$EndElements\n";
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}
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/*
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* End of 3D section
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*/
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/*
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* 2D section : available for triangles and quadrangles
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* upto 2nd Order
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*/
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else if(ne == 0) /// means that there's no 3D element
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{
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cout << "\n Write Gmsh v2.xx Surface Mesh (triangle and/or quadrangles upto 2nd Order)" << endl;
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/// Prepare GMSH 2.0 file (See GMSH 2.0 Documentation)
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outfile << "$MeshFormat\n";
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outfile << (float)2.0 << " "
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<< (int)0 << " "
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<< (int)sizeof(double) << "\n";
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outfile << "$EndMeshFormat\n";
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/// Write nodes
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outfile << "$Nodes\n";
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outfile << np << "\n";
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for (i = 1; i <= np; i++)
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{
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const Point3d & p = mesh.Point(i);
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outfile << i << " "; /// node number
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outfile << p.X() << " ";
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outfile << p.Y() << " ";
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outfile << p.Z() << "\n";
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}
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outfile << "$EndNodes\n";
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/// write triangles & quadrangles
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outfile << "$Elements\n";
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outfile << nse << "\n";
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for (k = 1; k <= nse; k++)
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{
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int elType = 0;
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const Element2d & el = mesh.SurfaceElement(k);
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if(el.GetNP() == 3) elType = GMSH_TRIG; //// GMSH Type for a 3 node triangle
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if(el.GetNP() == 6) elType = GMSH_TRIG6; //// GMSH Type for a 6 node triangle
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if(el.GetNP() == 4) elType = GMSH_QUAD; //// GMSH Type for a 4 node quadrangle
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if(el.GetNP() == 8) elType = GMSH_QUAD8; //// GMSH Type for an 8 node quadrangle
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if(elType == 0)
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{
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cout << " Invalid surface element type for Gmsh 2.0 2D-Mesh Export Format !\n";
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return;
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}
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outfile << k;
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outfile << " ";
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outfile << elType;
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outfile << " ";
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outfile << "2";
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outfile << " ";
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outfile << mesh.GetFaceDescriptor (el.GetIndex()).BCProperty() << " ";
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/// that means that physical entity = elementary entity (arbitrary approach)
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outfile << mesh.GetFaceDescriptor (el.GetIndex()).BCProperty() << " ";
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for (l = 1; l <= el.GetNP(); l++)
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{
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outfile << " ";
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if((elType == GMSH_TRIG) || (elType == GMSH_TRIG6))
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{
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outfile << el.PNum(triGmsh[l]);
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}
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else if((elType == GMSH_QUAD) || (elType == GMSH_QUAD8))
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{
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outfile << el.PNum(quadGmsh[l]);
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}
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}
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outfile << "\n";
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}
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outfile << "$EndElements\n";
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}
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/*
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* End of 2D section
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*/
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else
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{
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cout << " Invalid element type for Gmsh v2.xx Export Format !\n";
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}
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} // End: WriteGmsh2Format
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} // End: namespace netgen
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@ -22,7 +22,7 @@ void RegisterUserFormats (Array<const char*> & names)
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"Neutral Format",
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"Surface Mesh Format" ,
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"DIFFPACK Format",
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"TecPlot Format",
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"TecPlot Format",
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"Tochnog Format",
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"Abaqus Format",
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"Fluent Format",
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@ -32,6 +32,7 @@ void RegisterUserFormats (Array<const char*> & names)
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"STL Format",
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"VRML Format",
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"Gmsh Format",
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"Gmsh2 Format"
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"JCMwave Format",
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"TET Format",
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// { "Chemnitz Format" },
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@ -46,10 +47,10 @@ void RegisterUserFormats (Array<const char*> & names)
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bool WriteUserFormat (const string & format,
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const Mesh & mesh,
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const CSGeometry & geom,
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const CSGeometry & geom,
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const string & filename)
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{
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PrintMessage (1, "Export mesh to file ", filename,
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PrintMessage (1, "Export mesh to file ", filename,
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", format is ", format);
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if (format == "Neutral Format")
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@ -100,7 +101,12 @@ bool WriteUserFormat (const string & format,
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else if (format == "Gmsh Format")
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WriteGmshFormat (mesh, geom, filename);
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// Philippose - 29/01/2009
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// Added Gmsh v2.xx export capability
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else if (format == "Gmsh2 Format")
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WriteGmsh2Format (mesh, geom, filename);
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else if (format == "JCMwave Format")
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WriteJCMFormat (mesh, geom, filename);
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@ -109,7 +115,7 @@ bool WriteUserFormat (const string & format,
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WriteTETFormat( mesh, filename);//, "High Frequency" );
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#endif
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else
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else
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{
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return 1;
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}
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@ -135,7 +141,7 @@ void WriteNeutralFormat (const Mesh & mesh,
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int nse = mesh.GetNSE();
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int nseg = mesh.GetNSeg();
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int i, j;
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int inverttets = mparam.inverttets;
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int invertsurf = mparam.inverttrigs;
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@ -144,13 +150,13 @@ void WriteNeutralFormat (const Mesh & mesh,
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outfile.precision(6);
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outfile.setf (ios::fixed, ios::floatfield);
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outfile.setf (ios::showpoint);
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outfile << np << "\n";
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for (i = 1; i <= np; i++)
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{
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const Point3d & p = mesh.Point(i);
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outfile.width(10);
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outfile << p.X() << " ";
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outfile.width(9);
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@ -235,13 +241,13 @@ void WriteSurfaceFormat (const Mesh & mesh,
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{
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// surface mesh
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int i, j;
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cout << "Write Surface Mesh" << endl;
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ofstream outfile (filename.c_str());
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outfile << "surfacemesh" << endl;
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outfile << mesh.GetNP() << endl;
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for (i = 1; i <= mesh.GetNP(); i++)
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{
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@ -276,37 +282,37 @@ void WriteSTLFormat (const Mesh & mesh,
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const string & filename)
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{
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cout << "\nWrite STL Surface Mesh" << endl;
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ofstream outfile (filename.c_str());
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int i;
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outfile.precision(10);
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outfile << "solid" << endl;
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for (i = 1; i <= mesh.GetNSE(); i++)
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{
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outfile << "facet normal ";
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const Point3d& p1 = mesh.Point(mesh.SurfaceElement(i).PNum(1));
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const Point3d& p2 = mesh.Point(mesh.SurfaceElement(i).PNum(2));
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const Point3d& p3 = mesh.Point(mesh.SurfaceElement(i).PNum(3));
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Vec3d normal = Cross(p2-p1,p3-p1);
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if (normal.Length() != 0)
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{
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normal /= (normal.Length());
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normal /= (normal.Length());
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}
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outfile << normal.X() << " " << normal.Y() << " " << normal.Z() << "\n";
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outfile << "outer loop\n";
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outfile << "vertex " << p1.X() << " " << p1.Y() << " " << p1.Z() << "\n";
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outfile << "vertex " << p2.X() << " " << p2.Y() << " " << p2.Z() << "\n";
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outfile << "vertex " << p3.X() << " " << p3.Y() << " " << p3.Z() << "\n";
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outfile << "endloop\n";
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outfile << "endfacet\n";
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outfile << "endfacet\n";
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}
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outfile << "endsolid" << endl;
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}
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@ -329,7 +335,7 @@ void WriteVRMLFormat (const Mesh & mesh,
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if (faces)
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{
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// Output in VRML, IndexedFaceSet is used
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// Output in VRML, IndexedFaceSet is used
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// Bartosz Sawicki <sawickib@ee.pw.edu.pl>
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int np = mesh.GetNP();
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@ -351,8 +357,8 @@ void WriteVRMLFormat (const Mesh & mesh,
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"Shape{ \n"
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"appearance Appearance { material Material { }} \n"
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"geometry IndexedFaceSet { \n"
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"coord Coordinate { point [ \n";
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"coord Coordinate { point [ \n";
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for (i = 1; i <= np; i++)
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{
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@ -364,12 +370,12 @@ void WriteVRMLFormat (const Mesh & mesh,
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}
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outfile << " ] } \n"
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"coordIndex [ \n";
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"coordIndex [ \n";
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for (i = 1; i <= nse; i++)
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{
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const Element2d & el = mesh.SurfaceElement(i);
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for (j = 1; j <= 3; j++)
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{
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outfile.width(8);
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@ -377,19 +383,19 @@ void WriteVRMLFormat (const Mesh & mesh,
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}
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outfile << " -1 \n";
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}
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outfile << " ] \n";
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//define number and RGB definitions of colors
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outfile << "color Color { color [1 0 0, 0 1 0, 0 0 1, 1 1 0]} \n"
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"colorIndex [\n";
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for (i = 1; i <= nse; i++)
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{
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outfile << mesh.GetFaceDescriptor(mesh.SurfaceElement(i).GetIndex ()).BCProperty();
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outfile << mesh.GetFaceDescriptor(mesh.SurfaceElement(i).GetIndex ()).BCProperty();
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outfile << endl;
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}
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outfile << " ] \n"
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"colorPerVertex FALSE \n"
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"creaseAngle 0 \n"
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@ -398,7 +404,7 @@ void WriteVRMLFormat (const Mesh & mesh,
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"convex TRUE \n"
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"} } # end of Shape\n"
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"] }\n";
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} /* end of VRMLFACES */
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|
||||
@ -427,8 +433,8 @@ void WriteVRMLFormat (const Mesh & mesh,
|
||||
"Shape{ \n"
|
||||
"appearance Appearance { material Material { }} \n"
|
||||
"geometry IndexedLineSet { \n"
|
||||
"coord Coordinate { point [ \n";
|
||||
|
||||
"coord Coordinate { point [ \n";
|
||||
|
||||
|
||||
for (i = 1; i <= np; i++)
|
||||
{
|
||||
@ -440,40 +446,40 @@ void WriteVRMLFormat (const Mesh & mesh,
|
||||
}
|
||||
|
||||
outfile << " ] } \n"
|
||||
"coordIndex [ \n";
|
||||
|
||||
"coordIndex [ \n";
|
||||
|
||||
for (i = 1; i <= nse; i++)
|
||||
{
|
||||
const Element2d & el = mesh.SurfaceElement(i);
|
||||
|
||||
|
||||
for (j = 1; j <= 3; j++)
|
||||
{
|
||||
outfile.width(8);
|
||||
outfile << el.PNum(j)-1;
|
||||
}
|
||||
outfile.width(8);
|
||||
outfile << el.PNum(1)-1;
|
||||
outfile.width(8);
|
||||
outfile << el.PNum(1)-1;
|
||||
outfile << " -1 \n";
|
||||
}
|
||||
|
||||
|
||||
outfile << " ] \n";
|
||||
|
||||
/* Uncomment if you want color mesh
|
||||
/* Uncomment if you want color mesh
|
||||
outfile << "color Color { color [1 1 1, 0 1 0, 0 0 1, 1 1 0]} \n"
|
||||
"colorIndex [\n";
|
||||
|
||||
|
||||
for (i = 1; i <= nse; i++)
|
||||
{
|
||||
outfile << mesh.GetFaceDescriptor(mesh.SurfaceElement(i).GetIndex ()).BCProperty();
|
||||
outfile << mesh.GetFaceDescriptor(mesh.SurfaceElement(i).GetIndex ()).BCProperty();
|
||||
outfile << endl;
|
||||
}
|
||||
|
||||
|
||||
outfile << " ] \n"
|
||||
*/
|
||||
*/
|
||||
outfile << "colorPerVertex FALSE \n"
|
||||
"} } #end of Shape\n"
|
||||
"] } \n";
|
||||
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
@ -490,7 +496,7 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
const string & filename)
|
||||
{
|
||||
|
||||
|
||||
ofstream outfile (filename.c_str());
|
||||
|
||||
if (mesh.GetDimension() == 3)
|
||||
@ -498,7 +504,7 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
{
|
||||
|
||||
// output for FEPP
|
||||
|
||||
|
||||
int np = mesh.GetNP();
|
||||
int ne = mesh.GetNE();
|
||||
int nse = mesh.GetNSE();
|
||||
@ -508,7 +514,7 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
outfile.precision(5);
|
||||
outfile.setf (ios::fixed, ios::floatfield);
|
||||
outfile.setf (ios::showpoint);
|
||||
|
||||
|
||||
outfile << "volumemesh4" << endl;
|
||||
outfile << nse << endl;
|
||||
for (i = 1; i <= nse; i++)
|
||||
@ -561,7 +567,7 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
outfile << p.Z() << "\n";
|
||||
}
|
||||
|
||||
/*
|
||||
/*
|
||||
if (typ == WRITE_FEPPML)
|
||||
{
|
||||
int nbn = mesh.mlbetweennodes.Size();
|
||||
@ -569,7 +575,7 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
for (i = 1; i <= nbn; i++)
|
||||
outfile << mesh.mlbetweennodes.Get(i).I1() << " "
|
||||
<< mesh.mlbetweennodes.Get(i).I2() << "\n";
|
||||
|
||||
|
||||
|
||||
// int ncon = mesh.connectedtonode.Size();
|
||||
// outfile << ncon << "\n";
|
||||
@ -586,15 +592,15 @@ void WriteFEPPFormat (const Mesh & mesh,
|
||||
for (i = 1; i <= ns; i++)
|
||||
geom.GetSurface(mesh.GetFaceDescriptor(i).SurfNr())->Print(outfile);
|
||||
}
|
||||
else
|
||||
else
|
||||
outfile << "0" << endl;
|
||||
}
|
||||
|
||||
|
||||
|
||||
else
|
||||
|
||||
|
||||
{ // 2D fepp format
|
||||
|
||||
|
||||
;
|
||||
/*
|
||||
extern SplineGeometry2d * geometry2d;
|
||||
@ -628,7 +634,7 @@ void WriteEdgeElementFormat (const Mesh & mesh,
|
||||
int nsurfelem = mesh.GetNSE();
|
||||
int nedges = top->GetNEdges();
|
||||
int i, j;
|
||||
|
||||
|
||||
int inverttets = mparam.inverttets;
|
||||
int invertsurf = mparam.inverttrigs;
|
||||
Array<int> edges;
|
||||
@ -640,12 +646,12 @@ void WriteEdgeElementFormat (const Mesh & mesh,
|
||||
outfile.setf (ios::showpoint);
|
||||
|
||||
|
||||
// vertices with coordinates
|
||||
// vertices with coordinates
|
||||
outfile << npoints << "\n";
|
||||
for (i = 1; i <= npoints; i++)
|
||||
{
|
||||
const Point3d & p = mesh.Point(i);
|
||||
|
||||
|
||||
outfile.width(10);
|
||||
outfile << p.X() << " ";
|
||||
outfile.width(9);
|
||||
@ -761,7 +767,7 @@ void WriteFile (int typ,
|
||||
double h)
|
||||
{
|
||||
|
||||
|
||||
|
||||
int inverttets = mparam.inverttets;
|
||||
int invertsurf = mparam.inverttrigs;
|
||||
|
||||
@ -792,7 +798,7 @@ void WriteFile (int typ,
|
||||
|
||||
// edge (point) on boundary ?
|
||||
BitArray bedge, bpoint(mesh.GetNP());
|
||||
|
||||
|
||||
static int eledges[6][2] = { { 1, 2 } , { 1, 3 } , { 1, 4 },
|
||||
{ 2, 3 } , { 2, 4 } , { 3, 4 } };
|
||||
|
||||
@ -815,7 +821,7 @@ void WriteFile (int typ,
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
// set bedges, bpoints
|
||||
bedge.SetSize (edgelist.Size());
|
||||
bedge.Clear();
|
||||
@ -844,7 +850,7 @@ void WriteFile (int typ,
|
||||
for (i = 1; i <= mesh.GetNE(); i++)
|
||||
{
|
||||
const Element & el = mesh.VolumeElement(i);
|
||||
|
||||
|
||||
outfile.width(8);
|
||||
outfile << i;
|
||||
for (j = 1; j <= 4; j++)
|
||||
@ -878,7 +884,7 @@ void WriteFile (int typ,
|
||||
for (i = 1; i <= mesh.GetNP(); i++)
|
||||
{
|
||||
const Point3d & p = mesh.Point(i);
|
||||
|
||||
|
||||
for (j = 1; j <= 3; j++)
|
||||
{
|
||||
outfile.width(8);
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
/**************************************************************************/
|
||||
|
||||
|
||||
extern
|
||||
extern
|
||||
void WriteFile (int typ,
|
||||
const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
@ -18,7 +18,7 @@ void WriteFile (int typ,
|
||||
|
||||
|
||||
|
||||
extern
|
||||
extern
|
||||
void ReadFile (Mesh & mesh,
|
||||
const string & filename);
|
||||
|
||||
@ -55,6 +55,14 @@ void WriteGmshFormat (const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
const string & filename);
|
||||
|
||||
|
||||
// Philippose - 29/01/2009
|
||||
// Added GMSH v2.xx Mesh Export support
|
||||
void WriteGmsh2Format (const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
const string & filename);
|
||||
|
||||
|
||||
extern
|
||||
void WriteUserChemnitz (const Mesh & mesh,
|
||||
const string & filename);
|
||||
@ -65,7 +73,7 @@ void WriteJCMFormat (const Mesh & mesh,
|
||||
const string & filename);
|
||||
|
||||
|
||||
extern
|
||||
extern
|
||||
void WriteDiffPackFormat (const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
const string & filename);
|
||||
@ -131,7 +139,7 @@ extern void RegisterUserFormats (Array<const char*> & names);
|
||||
|
||||
extern bool WriteUserFormat (const string & format,
|
||||
const Mesh & mesh,
|
||||
const CSGeometry & geom,
|
||||
const CSGeometry & geom,
|
||||
const string & filename);
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user