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https://github.com/NGSolve/netgen.git
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624 lines
12 KiB
C++
624 lines
12 KiB
C++
/**************************************************************************/
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/* File: nglib.cc */
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/* Author: Joachim Schoeberl */
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/* Date: 7. May. 2000 */
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/**************************************************************************/
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/*
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Interface to the netgen meshing kernel
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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 <stlgeom.hpp>
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#include <geometry2d.hpp>
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#include <meshing.hpp>
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namespace netgen {
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extern void MeshFromSpline2D (SplineGeometry2d & geometry,
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Mesh *& mesh,
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MeshingParameters & mp);
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}
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#ifdef PARALLEL
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#include <mpi.h>
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namespace netgen
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{
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int id, ntasks;
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MPI_Group MPI_HIGHORDER_WORLD;
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MPI_Comm MPI_HIGHORDER_COMM;
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}
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#endif
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/*
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// should not be needed (occ currently requires it)
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namespace netgen {
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#include "../libsrc/visualization/vispar.hpp"
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VisualizationParameters vispar;
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VisualizationParameters :: VisualizationParameters() { ; }
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}
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*/
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namespace nglib {
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#include "nglib.h"
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}
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using namespace netgen;
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// constants and types:
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namespace nglib
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{
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// initialize, deconstruct Netgen library:
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void Ng_Init ()
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{
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mycout = &cout;
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myerr = &cerr;
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// netgen::testout->SetOutStream (new ofstream ("test.out"));
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testout = new ofstream ("test.out");
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}
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void Ng_Exit ()
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{
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;
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}
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Ng_Mesh * Ng_NewMesh ()
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{
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Mesh * mesh = new Mesh;
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mesh->AddFaceDescriptor (FaceDescriptor (1, 1, 0, 1));
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return (Ng_Mesh*)(void*)mesh;
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}
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void Ng_DeleteMesh (Ng_Mesh * mesh)
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{
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delete (Mesh*)mesh;
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}
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// feeds points, surface elements and volume elements to the mesh
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void Ng_AddPoint (Ng_Mesh * mesh, double * x)
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{
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Mesh * m = (Mesh*)mesh;
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m->AddPoint (Point3d (x[0], x[1], x[2]));
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}
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void Ng_AddSurfaceElement (Ng_Mesh * mesh, Ng_Surface_Element_Type et,
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int * pi)
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{
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Mesh * m = (Mesh*)mesh;
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Element2d el (3);
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el.SetIndex (1);
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el.PNum(1) = pi[0];
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el.PNum(2) = pi[1];
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el.PNum(3) = pi[2];
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m->AddSurfaceElement (el);
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}
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void Ng_AddVolumeElement (Ng_Mesh * mesh, Ng_Volume_Element_Type et,
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int * pi)
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{
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Mesh * m = (Mesh*)mesh;
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Element el (4);
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el.SetIndex (1);
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el.PNum(1) = pi[0];
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el.PNum(2) = pi[1];
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el.PNum(3) = pi[2];
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el.PNum(4) = pi[3];
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m->AddVolumeElement (el);
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}
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// ask for number of points, surface and volume elements
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int Ng_GetNP (Ng_Mesh * mesh)
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{
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return ((Mesh*)mesh) -> GetNP();
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}
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int Ng_GetNSE (Ng_Mesh * mesh)
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{
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return ((Mesh*)mesh) -> GetNSE();
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}
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int Ng_GetNE (Ng_Mesh * mesh)
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{
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return ((Mesh*)mesh) -> GetNE();
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}
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// return point coordinates
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void Ng_GetPoint (Ng_Mesh * mesh, int num, double * x)
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{
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const Point3d & p = ((Mesh*)mesh)->Point(num);
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x[0] = p.X();
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x[1] = p.Y();
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x[2] = p.Z();
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}
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// return surface and volume element in pi
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Ng_Surface_Element_Type
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Ng_GetSurfaceElement (Ng_Mesh * mesh, int num, int * pi)
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{
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const Element2d & el = ((Mesh*)mesh)->SurfaceElement(num);
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for (int i = 1; i <= el.GetNP(); i++)
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pi[i-1] = el.PNum(i);
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Ng_Surface_Element_Type et;
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switch (el.GetNP())
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{
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case 3: et = NG_TRIG; break;
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case 4: et = NG_QUAD; break;
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case 6: et = NG_TRIG6; break;
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}
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return et;
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}
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Ng_Volume_Element_Type
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Ng_GetVolumeElement (Ng_Mesh * mesh, int num, int * pi)
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{
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const Element & el = ((Mesh*)mesh)->VolumeElement(num);
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for (int i = 1; i <= el.GetNP(); i++)
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pi[i-1] = el.PNum(i);
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Ng_Volume_Element_Type et;
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switch (el.GetNP())
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{
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case 4: et = NG_TET; break;
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case 5: et = NG_PYRAMID; break;
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case 6: et = NG_PRISM; break;
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case 10: et = NG_TET10; break;
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}
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return et;
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}
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void Ng_RestrictMeshSizeGlobal (Ng_Mesh * mesh, double h)
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{
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((Mesh*)mesh) -> SetGlobalH (h);
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}
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void Ng_RestrictMeshSizePoint (Ng_Mesh * mesh, double * p, double h)
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{
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((Mesh*)mesh) -> RestrictLocalH (Point3d (p[0], p[1], p[2]), h);
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}
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void Ng_RestrictMeshSizeBox (Ng_Mesh * mesh, double * pmin, double * pmax, double h)
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{
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for (double x = pmin[0]; x < pmax[0]; x += h)
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for (double y = pmin[1]; y < pmax[1]; y += h)
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for (double z = pmin[2]; z < pmax[2]; z += h)
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((Mesh*)mesh) -> RestrictLocalH (Point3d (x, y, z), h);
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}
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// generates volume mesh from surface mesh
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Ng_Result Ng_GenerateVolumeMesh (Ng_Mesh * mesh, Ng_Meshing_Parameters * mp)
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{
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Mesh * m = (Mesh*)mesh;
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MeshingParameters mparam;
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mparam.maxh = mp->maxh;
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mparam.meshsizefilename = mp->meshsize_filename;
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m->CalcLocalH();
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MeshVolume (mparam, *m);
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RemoveIllegalElements (*m);
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OptimizeVolume (mparam, *m);
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return NG_OK;
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}
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// 2D Meshing Functions:
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void Ng_AddPoint_2D (Ng_Mesh * mesh, double * x)
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{
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Mesh * m = (Mesh*)mesh;
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m->AddPoint (Point3d (x[0], x[1], 0));
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}
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void Ng_AddBoundarySeg_2D (Ng_Mesh * mesh, int pi1, int pi2)
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{
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Mesh * m = (Mesh*)mesh;
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Segment seg;
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seg.p1 = pi1;
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seg.p2 = pi2;
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m->AddSegment (seg);
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}
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int Ng_GetNP_2D (Ng_Mesh * mesh)
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{
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Mesh * m = (Mesh*)mesh;
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return m->GetNP();
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}
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int Ng_GetNE_2D (Ng_Mesh * mesh)
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{
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Mesh * m = (Mesh*)mesh;
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return m->GetNSE();
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}
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int Ng_GetNSeg_2D (Ng_Mesh * mesh)
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{
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Mesh * m = (Mesh*)mesh;
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return m->GetNSeg();
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}
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void Ng_GetPoint_2D (Ng_Mesh * mesh, int num, double * x)
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{
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Mesh * m = (Mesh*)mesh;
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Point<3> & p = m->Point(num);
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x[0] = p(0);
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x[1] = p(1);
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}
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void Ng_GetElement_2D (Ng_Mesh * mesh, int num, int * pi, int * matnum)
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{
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const Element2d & el = ((Mesh*)mesh)->SurfaceElement(num);
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for (int i = 1; i <= 3; i++)
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pi[i-1] = el.PNum(i);
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if (matnum)
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*matnum = el.GetIndex();
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}
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void Ng_GetSegment_2D (Ng_Mesh * mesh, int num, int * pi, int * matnum)
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{
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const Segment & seg = ((Mesh*)mesh)->LineSegment(num);
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pi[0] = seg.p1;
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pi[1] = seg.p2;
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if (matnum)
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*matnum = seg.edgenr;
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}
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Ng_Geometry_2D * Ng_LoadGeometry_2D (const char * filename)
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{
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SplineGeometry2d * geom = new SplineGeometry2d();
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geom -> Load (filename);
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return (Ng_Geometry_2D *)geom;
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}
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Ng_Result Ng_GenerateMesh_2D (Ng_Geometry_2D * geom,
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Ng_Mesh ** mesh,
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Ng_Meshing_Parameters * mp)
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{
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// use global variable mparam
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// MeshingParameters mparam;
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mparam.maxh = mp->maxh;
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mparam.meshsizefilename = mp->meshsize_filename;
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mparam.quad = mp->quad_dominated;
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Mesh * m;
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MeshFromSpline2D (*(SplineGeometry2d*)geom, m, mparam);
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cout << m->GetNSE() << " elements, " << m->GetNP() << " points" << endl;
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*mesh = (Ng_Mesh*)m;
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return NG_OK;
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}
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void Ng_HP_Refinement (Ng_Geometry_2D * geom,
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Ng_Mesh * mesh,
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int levels)
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{
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Refinement2d ref(*(SplineGeometry2d*)geom);
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HPRefinement (*(Mesh*)mesh, &ref, levels);
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}
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void Ng_HP_Refinement (Ng_Geometry_2D * geom,
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Ng_Mesh * mesh,
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int levels, double parameter)
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{
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Refinement2d ref(*(SplineGeometry2d*)geom);
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HPRefinement (*(Mesh*)mesh, &ref, levels, parameter);
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}
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Array<STLReadTriangle> readtrias; //only before initstlgeometry
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Array<Point<3> > readedges; //only before init stlgeometry
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void Ng_SaveMesh(Ng_Mesh * mesh, const char* filename)
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{
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((Mesh*)mesh)->Save(filename);
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}
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Ng_Mesh * Ng_LoadMesh(const char* filename)
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{
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Mesh * mesh = new Mesh;
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mesh->Load(filename);
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return ( (Ng_Mesh*)mesh );
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}
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// loads geometry from STL file
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Ng_STL_Geometry * Ng_STL_LoadGeometry (const char * filename, int binary)
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{
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int i;
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STLGeometry geom;
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STLGeometry* geo;
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ifstream ist(filename);
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if (binary)
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{
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geo = geom.LoadBinary(ist);
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}
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else
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{
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geo = geom.Load(ist);
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}
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readtrias.SetSize(0);
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readedges.SetSize(0);
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Point3d p;
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Vec3d normal;
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double p1[3];
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double p2[3];
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double p3[3];
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double n[3];
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Ng_STL_Geometry * geo2 = Ng_STL_NewGeometry();
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for (i = 1; i <= geo->GetNT(); i++)
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{
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const STLTriangle& t = geo->GetTriangle(i);
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p = geo->GetPoint(t.PNum(1));
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p1[0] = p.X(); p1[1] = p.Y(); p1[2] = p.Z();
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p = geo->GetPoint(t.PNum(2));
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p2[0] = p.X(); p2[1] = p.Y(); p2[2] = p.Z();
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p = geo->GetPoint(t.PNum(3));
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p3[0] = p.X(); p3[1] = p.Y(); p3[2] = p.Z();
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normal = t.Normal();
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n[0] = normal.X(); n[1] = normal.Y(); n[2] = normal.Z();
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Ng_STL_AddTriangle(geo2, p1, p2, p3, n);
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}
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return geo2;
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}
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// generate new STL Geometry
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Ng_STL_Geometry * Ng_STL_NewGeometry ()
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{
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return (Ng_STL_Geometry*)(void*)new STLGeometry;
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}
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// after adding triangles (and edges) initialize
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Ng_Result Ng_STL_InitSTLGeometry (Ng_STL_Geometry * geom)
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{
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STLGeometry* geo = (STLGeometry*)geom;
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geo->InitSTLGeometry(readtrias);
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readtrias.SetSize(0);
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if (readedges.Size() != 0)
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{
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int i;
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/*
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for (i = 1; i <= readedges.Size(); i+=2)
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{
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cout << "e(" << readedges.Get(i) << "," << readedges.Get(i+1) << ")" << endl;
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}
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*/
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geo->AddEdges(readedges);
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}
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if (geo->GetStatus() == STLTopology::STL_GOOD || geo->GetStatus() == STLTopology::STL_WARNING) return NG_OK;
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return NG_SURFACE_INPUT_ERROR;
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}
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// automatically generates edges:
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Ng_Result Ng_STL_MakeEdges (Ng_STL_Geometry * geom,
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Ng_Mesh* mesh,
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Ng_Meshing_Parameters * mp)
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{
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STLGeometry* stlgeometry = (STLGeometry*)geom;
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Mesh* me = (Mesh*)mesh;
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MeshingParameters mparam;
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mparam.maxh = mp->maxh;
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mparam.meshsizefilename = mp->meshsize_filename;
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me -> SetGlobalH (mparam.maxh);
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me -> SetLocalH (stlgeometry->GetBoundingBox().PMin() - Vec3d(10, 10, 10),
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stlgeometry->GetBoundingBox().PMax() + Vec3d(10, 10, 10),
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0.3);
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me -> LoadLocalMeshSize (mp->meshsize_filename);
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/*
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if (mp->meshsize_filename)
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{
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ifstream infile (mp->meshsize_filename);
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if (!infile.good()) return NG_FILE_NOT_FOUND;
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me -> LoadLocalMeshSize (infile);
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}
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*/
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STLMeshing (*stlgeometry, *me);
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stlgeometry->edgesfound = 1;
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stlgeometry->surfacemeshed = 0;
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stlgeometry->surfaceoptimized = 0;
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stlgeometry->volumemeshed = 0;
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return NG_OK;
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}
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// generates mesh, empty mesh be already created.
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Ng_Result Ng_STL_GenerateSurfaceMesh (Ng_STL_Geometry * geom,
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Ng_Mesh* mesh,
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Ng_Meshing_Parameters * mp)
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{
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STLGeometry* stlgeometry = (STLGeometry*)geom;
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Mesh* me = (Mesh*)mesh;
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MeshingParameters mparam;
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mparam.maxh = mp->maxh;
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mparam.meshsizefilename = mp->meshsize_filename;
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/*
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me -> SetGlobalH (mparam.maxh);
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me -> SetLocalH (stlgeometry->GetBoundingBox().PMin() - Vec3d(10, 10, 10),
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stlgeometry->GetBoundingBox().PMax() + Vec3d(10, 10, 10),
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0.3);
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*/
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/*
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STLMeshing (*stlgeometry, *me);
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stlgeometry->edgesfound = 1;
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stlgeometry->surfacemeshed = 0;
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stlgeometry->surfaceoptimized = 0;
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stlgeometry->volumemeshed = 0;
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*/
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int retval = STLSurfaceMeshing (*stlgeometry, *me);
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if (retval == MESHING3_OK)
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{
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(*mycout) << "Success !!!!" << endl;
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stlgeometry->surfacemeshed = 1;
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stlgeometry->surfaceoptimized = 0;
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stlgeometry->volumemeshed = 0;
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}
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else if (retval == MESHING3_OUTERSTEPSEXCEEDED)
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{
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(*mycout) << "ERROR: Give up because of too many trials. Meshing aborted!" << endl;
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}
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else if (retval == MESHING3_TERMINATE)
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{
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(*mycout) << "Meshing Stopped!" << endl;
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}
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else
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{
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(*mycout) << "ERROR: Surface meshing not successful. Meshing aborted!" << endl;
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}
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STLSurfaceOptimization (*stlgeometry, *me, mparam);
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return NG_OK;
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}
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// fills STL Geometry
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// positive orientation
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// normal vector may be null-pointer
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void Ng_STL_AddTriangle (Ng_STL_Geometry * geom,
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double * p1, double * p2, double * p3, double * nv)
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{
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Point<3> apts[3];
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apts[0] = Point<3>(p1[0],p1[1],p1[2]);
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apts[1] = Point<3>(p2[0],p2[1],p2[2]);
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apts[2] = Point<3>(p3[0],p3[1],p3[2]);
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Vec<3> n;
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if (!nv)
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n = Cross (apts[0]-apts[1], apts[0]-apts[2]);
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else
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n = Vec<3>(nv[0],nv[1],nv[2]);
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readtrias.Append(STLReadTriangle(apts,n));
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}
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|
|
|
// add (optional) edges:
|
|
void Ng_STL_AddEdge (Ng_STL_Geometry * geom,
|
|
double * p1, double * p2)
|
|
{
|
|
readedges.Append(Point3d(p1[0],p1[1],p1[2]));
|
|
readedges.Append(Point3d(p2[0],p2[1],p2[2]));
|
|
}
|
|
|
|
|
|
|
|
Ng_Meshing_Parameters :: Ng_Meshing_Parameters()
|
|
{
|
|
maxh = 1000;
|
|
fineness = 0.5;
|
|
secondorder = 0;
|
|
meshsize_filename = 0;
|
|
quad_dominated = 0;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
// compatibility functions:
|
|
|
|
namespace netgen
|
|
{
|
|
|
|
char geomfilename[255];
|
|
|
|
void MyError (const char * ch)
|
|
{
|
|
cerr << ch;
|
|
}
|
|
|
|
//Destination for messages, errors, ...
|
|
void Ng_PrintDest(const char * s)
|
|
{
|
|
(*mycout) << s << flush;
|
|
}
|
|
|
|
double GetTime ()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void ResetTime ()
|
|
{
|
|
;
|
|
}
|
|
|
|
void MyBeep (int i)
|
|
{
|
|
;
|
|
}
|
|
|
|
void Render()
|
|
{
|
|
;
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|