mirror of
https://github.com/NGSolve/netgen.git
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143 lines
3.6 KiB
C++
143 lines
3.6 KiB
C++
#include <iostream>
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#include <climits>
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#include "TopTools_IndexedMapOfShape.hxx"
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#include "TopoDS.hxx"
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#include "TopoDS_Face.hxx"
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#include "TopoDS_Shape.hxx"
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#include "GProp_GProps.hxx"
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#include "BRepGProp.hxx"
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using namespace std;
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namespace nglib {
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#include <nglib.h>
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}
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int main (int argc, char ** argv)
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{
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using namespace nglib;
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cout << "Netgen NgLib - OpenCascade Test Case" << endl;
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if (argc != 2)
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{
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cerr << "use: ng_occ <src_step>" << endl;
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return 1;
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}
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// Define pointer to OCC Geometry
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Ng_OCC_Geometry *occ_geom;
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Ng_Mesh *occ_mesh;
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Ng_Meshing_Parameters mp;
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TopTools_IndexedMapOfShape FMap;
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Ng_OCC_TopTools_IndexedMapOfShape *occ_fmap = (Ng_OCC_TopTools_IndexedMapOfShape*)&FMap;
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// Result of Netgen Operations
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Ng_Result ng_res;
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// Initialise the Netgen Core library
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Ng_Init();
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// Read in the OCC File
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occ_geom = Ng_OCC_Load_STEP(argv[1]);
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if(!occ_geom)
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{
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cout << "Error reading in STEP File: " << argv[1] << endl;
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return 1;
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}
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cout << "Successfully loaded STEP File: " << argv[1] << endl;
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occ_mesh = Ng_NewMesh();
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ng_res = Ng_OCC_GetFMap(occ_geom,occ_fmap);
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cout << "ng_res = " << ng_res << endl;
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if(!FMap.Extent())
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{
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cout << "Error retrieving Face map...." << endl;
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return 1;
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}
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cout << "Successfully extracted the Face Map....:" << FMap.Extent() << endl;
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for(int i = 1; i <= FMap.Extent(); i++)
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{
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TopoDS_Face OCCface;
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OCCface = TopoDS::Face(FMap.FindKey(i));
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GProp_GProps faceProps;
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BRepGProp::SurfaceProperties(OCCface,faceProps);
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cout << "Index: " << i
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<< " :: Area: " << faceProps.Mass()
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<< " :: Hash: " << OCCface.HashCode(1e+6)
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<< endl;
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}
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mp.uselocalh = 1;
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mp.elementsperedge = 2.0;
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mp.elementspercurve = 2.0;
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mp.maxh = 10.0;
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mp.grading = 0.2;
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mp.closeedgeenable = 0;
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mp.closeedgefact = 1.0;
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mp.optsurfmeshenable = 1;
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cout << "Setting Local Mesh size....." << endl;
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cout << "OCC Mesh Pointer before call = " << occ_mesh << endl;
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Ng_OCC_SetLocalMeshSize(occ_geom, occ_mesh, &mp);
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cout << "Local Mesh size successfully set....." << endl;
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cout << "OCC Mesh Pointer after call = " << occ_mesh << endl;
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cout << "Creating Edge Mesh....." << endl;
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ng_res = Ng_OCC_GenerateEdgeMesh(occ_geom, occ_mesh, &mp);
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if(ng_res != NG_OK)
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{
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Ng_DeleteMesh(occ_mesh);
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cout << "Error creating Edge Mesh.... Aborting!!" << endl;
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return 1;
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}
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else
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{
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cout << "Edge Mesh successfully created....." << endl;
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cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
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}
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cout << "Creating Surface Mesh....." << endl;
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ng_res = Ng_OCC_GenerateSurfaceMesh(occ_geom, occ_mesh, &mp);
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if(ng_res != NG_OK)
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{
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Ng_DeleteMesh(occ_mesh);
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cout << "Error creating Surface Mesh..... Aborting!!" << endl;
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return 1;
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}
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else
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{
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cout << "Surface Mesh successfully created....." << endl;
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cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
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cout << "Number of surface elements = " << Ng_GetNSE(occ_mesh) << endl;
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}
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cout << "Creating Volume Mesh....." << endl;
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ng_res = Ng_GenerateVolumeMesh(occ_mesh, &mp);
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cout << "Volume Mesh successfully created....." << endl;
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cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
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cout << "Number of volume elements = " << Ng_GetNE(occ_mesh) << endl;
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cout << "Saving Mesh as VOL file....." << endl;
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Ng_SaveMesh(occ_mesh,"test_occ.vol");
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return 0;
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}
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