mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-27 14:20:34 +05:00
143 lines
3.6 KiB
C++
143 lines
3.6 KiB
C++
#include <iostream>
|
|
#include <climits>
|
|
|
|
#include "TopTools_IndexedMapOfShape.hxx"
|
|
#include "TopoDS.hxx"
|
|
#include "TopoDS_Face.hxx"
|
|
#include "TopoDS_Shape.hxx"
|
|
#include "GProp_GProps.hxx"
|
|
#include "BRepGProp.hxx"
|
|
|
|
using namespace std;
|
|
|
|
namespace nglib {
|
|
#include <nglib.h>
|
|
}
|
|
|
|
int main (int argc, char ** argv)
|
|
{
|
|
using namespace nglib;
|
|
|
|
cout << "Netgen NgLib - OpenCascade Test Case" << endl;
|
|
|
|
if (argc != 2)
|
|
{
|
|
cerr << "use: ng_occ <src_step>" << endl;
|
|
return 1;
|
|
}
|
|
|
|
// Define pointer to OCC Geometry
|
|
Ng_OCC_Geometry *occ_geom;
|
|
|
|
Ng_Mesh *occ_mesh;
|
|
|
|
Ng_Meshing_Parameters mp;
|
|
|
|
TopTools_IndexedMapOfShape FMap;
|
|
|
|
Ng_OCC_TopTools_IndexedMapOfShape *occ_fmap = (Ng_OCC_TopTools_IndexedMapOfShape*)&FMap;
|
|
|
|
// Result of Netgen Operations
|
|
Ng_Result ng_res;
|
|
|
|
// Initialise the Netgen Core library
|
|
Ng_Init();
|
|
|
|
// Read in the OCC File
|
|
occ_geom = Ng_OCC_Load_STEP(argv[1]);
|
|
if(!occ_geom)
|
|
{
|
|
cout << "Error reading in STEP File: " << argv[1] << endl;
|
|
return 1;
|
|
}
|
|
cout << "Successfully loaded STEP File: " << argv[1] << endl;
|
|
|
|
occ_mesh = Ng_NewMesh();
|
|
|
|
ng_res = Ng_OCC_GetFMap(occ_geom,occ_fmap);
|
|
|
|
cout << "ng_res = " << ng_res << endl;
|
|
|
|
if(!FMap.Extent())
|
|
{
|
|
cout << "Error retrieving Face map...." << endl;
|
|
return 1;
|
|
}
|
|
|
|
cout << "Successfully extracted the Face Map....:" << FMap.Extent() << endl;
|
|
|
|
for(int i = 1; i <= FMap.Extent(); i++)
|
|
{
|
|
TopoDS_Face OCCface;
|
|
OCCface = TopoDS::Face(FMap.FindKey(i));
|
|
|
|
GProp_GProps faceProps;
|
|
BRepGProp::SurfaceProperties(OCCface,faceProps);
|
|
|
|
cout << "Index: " << i
|
|
<< " :: Area: " << faceProps.Mass()
|
|
<< " :: Hash: " << OCCface.HashCode(1e+6)
|
|
<< endl;
|
|
}
|
|
|
|
mp.uselocalh = 1;
|
|
mp.elementsperedge = 2.0;
|
|
mp.elementspercurve = 2.0;
|
|
mp.maxh = 10.0;
|
|
mp.grading = 0.2;
|
|
mp.closeedgeenable = 0;
|
|
mp.closeedgefact = 1.0;
|
|
mp.optsurfmeshenable = 1;
|
|
|
|
|
|
cout << "Setting Local Mesh size....." << endl;
|
|
cout << "OCC Mesh Pointer before call = " << occ_mesh << endl;
|
|
Ng_OCC_SetLocalMeshSize(occ_geom, occ_mesh, &mp);
|
|
cout << "Local Mesh size successfully set....." << endl;
|
|
cout << "OCC Mesh Pointer after call = " << occ_mesh << endl;
|
|
|
|
cout << "Creating Edge Mesh....." << endl;
|
|
ng_res = Ng_OCC_GenerateEdgeMesh(occ_geom, occ_mesh, &mp);
|
|
if(ng_res != NG_OK)
|
|
{
|
|
Ng_DeleteMesh(occ_mesh);
|
|
cout << "Error creating Edge Mesh.... Aborting!!" << endl;
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
cout << "Edge Mesh successfully created....." << endl;
|
|
cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
|
|
}
|
|
|
|
cout << "Creating Surface Mesh....." << endl;
|
|
|
|
ng_res = Ng_OCC_GenerateSurfaceMesh(occ_geom, occ_mesh, &mp);
|
|
if(ng_res != NG_OK)
|
|
{
|
|
Ng_DeleteMesh(occ_mesh);
|
|
cout << "Error creating Surface Mesh..... Aborting!!" << endl;
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
cout << "Surface Mesh successfully created....." << endl;
|
|
cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
|
|
cout << "Number of surface elements = " << Ng_GetNSE(occ_mesh) << endl;
|
|
}
|
|
|
|
cout << "Creating Volume Mesh....." << endl;
|
|
|
|
ng_res = Ng_GenerateVolumeMesh(occ_mesh, &mp);
|
|
|
|
cout << "Volume Mesh successfully created....." << endl;
|
|
cout << "Number of points = " << Ng_GetNP(occ_mesh) << endl;
|
|
cout << "Number of volume elements = " << Ng_GetNE(occ_mesh) << endl;
|
|
|
|
cout << "Saving Mesh as VOL file....." << endl;
|
|
Ng_SaveMesh(occ_mesh,"test_occ.vol");
|
|
|
|
return 0;
|
|
}
|
|
|