mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-26 05:50:32 +05:00
* Added the capability of generating Quad dominated 2D Meshes in Nglib
* Added the capability of generating Second Order 2D / 3D Meshes in Nglib * More Meshing Parameters now taken into account in Nglib * Streamlined the process of transferring the locally defined meshing parameters to the internal meshing parameters structure using a single function called "Transfer_Parameters" * Formatting changes to make the gaps between function definitions consistent
This commit is contained in:
Philippose Rajan
parent
a249e8a42e
commit
c412992519
232
nglib/nglib.cpp
232
nglib/nglib.cpp
@ -9,8 +9,6 @@
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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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@ -76,6 +74,7 @@ namespace nglib
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// Clean-up functions before ending usage of nglib
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DLL_HEADER void Ng_Exit ()
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{
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@ -84,6 +83,7 @@ namespace nglib
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// Create a new netgen mesh object
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DLL_HEADER Ng_Mesh * Ng_NewMesh ()
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{
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@ -94,6 +94,7 @@ namespace nglib
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// Delete an existing netgen mesh object
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DLL_HEADER void Ng_DeleteMesh (Ng_Mesh * mesh)
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{
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@ -112,6 +113,7 @@ namespace nglib
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// Save a netgen mesh in the native VOL format
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DLL_HEADER void Ng_SaveMesh(Ng_Mesh * mesh, const char* filename)
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{
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@ -120,6 +122,7 @@ namespace nglib
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// Load a netgen native VOL mesh from a given file
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DLL_HEADER Ng_Mesh * Ng_LoadMesh(const char* filename)
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{
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@ -130,6 +133,7 @@ namespace nglib
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// Manually add a point to an existing mesh object
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DLL_HEADER void Ng_AddPoint (Ng_Mesh * mesh, double * x)
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{
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@ -139,6 +143,7 @@ namespace nglib
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// Manually add a surface element of a given type to an existing mesh object
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DLL_HEADER void Ng_AddSurfaceElement (Ng_Mesh * mesh, Ng_Surface_Element_Type et,
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int * pi)
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@ -154,6 +159,7 @@ namespace nglib
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// Manually add a volume element of a given type to an existing mesh object
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DLL_HEADER void Ng_AddVolumeElement (Ng_Mesh * mesh, Ng_Volume_Element_Type et,
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int * pi)
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@ -170,6 +176,7 @@ namespace nglib
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// Obtain the number of points in the mesh
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DLL_HEADER int Ng_GetNP (Ng_Mesh * mesh)
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{
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@ -178,6 +185,7 @@ namespace nglib
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// Obtain the number of surface elements in the mesh
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DLL_HEADER int Ng_GetNSE (Ng_Mesh * mesh)
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{
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@ -186,6 +194,7 @@ namespace nglib
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// Obtain the number of volume elements in the mesh
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DLL_HEADER int Ng_GetNE (Ng_Mesh * mesh)
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{
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@ -194,6 +203,7 @@ namespace nglib
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// Return point coordinates of a given point index in the mesh
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DLL_HEADER void Ng_GetPoint (Ng_Mesh * mesh, int num, double * x)
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{
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@ -205,6 +215,7 @@ namespace nglib
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// Return the surface element at a given index "pi"
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DLL_HEADER Ng_Surface_Element_Type
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Ng_GetSurfaceElement (Ng_Mesh * mesh, int num, int * pi)
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@ -226,6 +237,7 @@ namespace nglib
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// Return the volume element at a given index "pi"
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DLL_HEADER Ng_Volume_Element_Type
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Ng_GetVolumeElement (Ng_Mesh * mesh, int num, int * pi)
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@ -248,6 +260,7 @@ namespace nglib
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// Set a global limit on the maximum mesh size allowed
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DLL_HEADER void Ng_RestrictMeshSizeGlobal (Ng_Mesh * mesh, double h)
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{
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@ -256,6 +269,7 @@ namespace nglib
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// Set a local limit on the maximum mesh size allowed around the given point
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DLL_HEADER void Ng_RestrictMeshSizePoint (Ng_Mesh * mesh, double * p, double h)
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{
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@ -264,6 +278,7 @@ namespace nglib
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// Set a local limit on the maximum mesh size allowed within a given box region
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DLL_HEADER void Ng_RestrictMeshSizeBox (Ng_Mesh * mesh, double * pmin, double * pmax, double h)
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{
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@ -275,6 +290,7 @@ namespace nglib
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// Generates volume mesh from an existing surface mesh
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DLL_HEADER Ng_Result Ng_GenerateVolumeMesh (Ng_Mesh * mesh, Ng_Meshing_Parameters * mp)
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{
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@ -284,12 +300,7 @@ namespace nglib
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// Do not locally re-define "mparam" here... "mparam" is a global
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// object
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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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double fineness = min(1., max(0., mp->fineness));
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mparam.curvaturesafety = 0.3 + 5 * fineness;
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mparam.segmentsperedge = 0.3 + 5 * fineness;
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mp->Transfer_Parameters();
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m->CalcLocalH();
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@ -302,10 +313,8 @@ namespace nglib
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/* ------------------ 2D Meshing Functions ------------------------- */
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DLL_HEADER 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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@ -313,6 +322,9 @@ namespace nglib
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m->AddPoint (Point3d (x[0], x[1], 0));
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}
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DLL_HEADER 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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@ -324,24 +336,35 @@ namespace nglib
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}
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DLL_HEADER 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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DLL_HEADER 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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DLL_HEADER 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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DLL_HEADER 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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@ -351,6 +374,9 @@ namespace nglib
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x[1] = p(1);
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}
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DLL_HEADER 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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@ -361,6 +387,8 @@ namespace nglib
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}
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DLL_HEADER 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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@ -390,9 +418,7 @@ namespace nglib
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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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mp->Transfer_Parameters();
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Mesh * m;
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MeshFromSpline2D (*(SplineGeometry2d*)geom, m, mparam);
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@ -428,10 +454,6 @@ namespace nglib
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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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@ -484,6 +506,7 @@ namespace nglib
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// generate new STL Geometry
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DLL_HEADER Ng_STL_Geometry * Ng_STL_NewGeometry ()
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{
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@ -492,6 +515,7 @@ namespace nglib
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// after adding triangles (and edges) initialize
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DLL_HEADER Ng_Result Ng_STL_InitSTLGeometry (Ng_STL_Geometry * geom)
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{
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@ -516,6 +540,7 @@ namespace nglib
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// automatically generates edges:
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DLL_HEADER Ng_Result Ng_STL_MakeEdges (Ng_STL_Geometry * geom,
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Ng_Mesh* mesh,
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@ -528,9 +553,7 @@ namespace nglib
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// Do not locally re-define "mparam" here... "mparam" is a global
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// object
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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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mp->Transfer_Parameters();
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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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@ -558,6 +581,8 @@ namespace nglib
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}
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// generates mesh, empty mesh be already created.
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DLL_HEADER Ng_Result Ng_STL_GenerateSurfaceMesh (Ng_STL_Geometry * geom,
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Ng_Mesh* mesh,
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@ -570,9 +595,8 @@ namespace nglib
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// Do not locally re-define "mparam" here... "mparam" is a global
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// object
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//MeshingParameters mparam;
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mp->Transfer_Parameters();
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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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@ -616,6 +640,8 @@ namespace nglib
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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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@ -648,10 +674,8 @@ namespace nglib
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#ifdef OCCGEOMETRY
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// --------------------- OCC Geometry / Meshing Utility Functions -------------------
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// Create new OCC Geometry Object
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DLL_HEADER Ng_OCC_Geometry * Ng_OCC_NewGeometry ()
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{
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@ -660,6 +684,7 @@ namespace nglib
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// Delete the OCC Geometry Object
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DLL_HEADER Ng_Result Ng_OCC_DeleteGeometry(Ng_OCC_Geometry * geom)
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{
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@ -675,6 +700,7 @@ namespace nglib
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// Loads geometry from STEP File
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DLL_HEADER Ng_OCC_Geometry * Ng_OCC_Load_STEP (const char * filename)
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{
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@ -687,6 +713,7 @@ namespace nglib
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// Loads geometry from IGES File
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DLL_HEADER Ng_OCC_Geometry * Ng_OCC_Load_IGES (const char * filename)
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{
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@ -699,6 +726,7 @@ namespace nglib
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// Loads geometry from BREP File
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DLL_HEADER Ng_OCC_Geometry * Ng_OCC_Load_BREP (const char * filename)
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{
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@ -711,6 +739,7 @@ namespace nglib
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// Locally limit the size of the mesh to be generated at various points
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// based on the topology of the geometry
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DLL_HEADER Ng_Result Ng_OCC_SetLocalMeshSize (Ng_OCC_Geometry * geom,
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@ -722,16 +751,7 @@ namespace nglib
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me->geomtype = Mesh::GEOM_OCC;
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mparam.uselocalh = mp->uselocalh;
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mparam.maxh = mp->maxh;
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mparam.minh = mp->minh;
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mparam.segmentsperedge = mp->elementsperedge;
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mparam.curvaturesafety = mp->elementspercurve;
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mparam.grading = mp->grading;
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mparam.meshsizefilename = mp->meshsize_filename;
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mp->Transfer_Parameters();
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occparam.resthcloseedgeenable = mp->closeedgeenable;
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occparam.resthcloseedgefac = mp->closeedgefact;
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@ -747,6 +767,7 @@ namespace nglib
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// Mesh the edges and add Face descriptors to prepare for surface meshing
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DLL_HEADER Ng_Result Ng_OCC_GenerateEdgeMesh (Ng_OCC_Geometry * geom,
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Ng_Mesh * mesh,
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@ -755,7 +776,7 @@ namespace nglib
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OCCGeometry * occgeom = (OCCGeometry*)geom;
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Mesh * me = (Mesh*)mesh;
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mparam.uselocalh = mp->uselocalh;
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mp->Transfer_Parameters();
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OCCFindEdges(*occgeom, *me);
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@ -782,7 +803,10 @@ namespace nglib
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OCCGeometry * occgeom = (OCCGeometry*)geom;
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Mesh * me = (Mesh*)mesh;
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mparam.uselocalh = mp->uselocalh;
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// Set the internal meshing parameters structure from the nglib meshing
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// parameters structure
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mp->Transfer_Parameters();
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// Only go into surface meshing if the face descriptors have already been added
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if(!me->GetNFD())
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@ -813,6 +837,8 @@ namespace nglib
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}
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// Extract the face map from the OCC geometry
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// The face map basically gives an index to each face in the geometry,
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// which can be used to access a specific face
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@ -841,8 +867,8 @@ namespace nglib
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// ------------------ Begin - Meshing Parameters related functions ------------------
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// Constructor for the local nglib meshing parameters class
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DLL_HEADER Ng_Meshing_Parameters :: Ng_Meshing_Parameters()
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{
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uselocalh = 1;
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@ -859,7 +885,7 @@ namespace nglib
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closeedgeenable = 0;
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closeedgefact = 2.0;
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secondorder = 0;
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second_order = 0;
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quad_dominated = 0;
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meshsize_filename = 0;
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@ -869,10 +895,18 @@ namespace nglib
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optsteps_2d = 3;
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optsteps_3d = 3;
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invert_tets = 0;
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invert_trigs = 0;
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check_overlap = 1;
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check_overlapping_boundary = 1;
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}
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// Reset the local meshing parameters to the default values
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DLL_HEADER void Ng_Meshing_Parameters :: Reset_Parameters()
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{
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uselocalh = 1;
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@ -889,7 +923,7 @@ namespace nglib
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closeedgeenable = 0;
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closeedgefact = 2.0;
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secondorder = 0;
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second_order = 0;
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quad_dominated = 0;
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meshsize_filename = 0;
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@ -899,37 +933,125 @@ namespace nglib
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optsteps_2d = 3;
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optsteps_3d = 3;
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invert_tets = 0;
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invert_trigs = 0;
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check_overlap = 1;
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check_overlapping_boundary = 1;
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}
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//
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DLL_HEADER void Ng_Meshing_Parameters :: Transfer_Parameters()
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{
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mparam.uselocalh = uselocalh;
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mparam.maxh = maxh;
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mparam.minh = minh;
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mparam.grading = grading;
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mparam.curvaturesafety = elementspercurve;
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mparam.segmentsperedge = elementsperedge;
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mparam.secondorder = second_order;
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mparam.quad = quad_dominated;
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mparam.meshsizefilename = meshsize_filename;
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mparam.optsteps2d = optsteps_2d;
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mparam.optsteps3d = optsteps_3d;
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mparam.inverttets = invert_tets;
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mparam.inverttrigs = invert_trigs;
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mparam.checkoverlap = check_overlap;
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mparam.checkoverlappingboundary = check_overlapping_boundary;
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}
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// ------------------ End - Meshing Parameters related functions --------------------
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// ------------------ Begin - Second Order Mesh generation functions ----------------
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DLL_HEADER void Ng_Generate_SecondOrder(Ng_Mesh * mesh)
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{
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Refinement ref;
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ref.MakeSecondOrder(*(Mesh*) mesh);
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}
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DLL_HEADER void Ng_2D_Generate_SecondOrder(Ng_Geometry_2D * geom,
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Ng_Mesh * mesh)
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{
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( (SplineGeometry2d*)geom ) -> GetRefinement().MakeSecondOrder( * (Mesh*) mesh );
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}
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DLL_HEADER void Ng_STL_Generate_SecondOrder(Ng_STL_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
((STLGeometry*)geom)->GetRefinement().MakeSecondOrder(*(Mesh*) mesh);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
DLL_HEADER void Ng_CSG_Generate_SecondOrder (Ng_CSG_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
((CSGeometry*)geom)->GetRefinement().MakeSecondOrder(*(Mesh*) mesh);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
#ifdef OCCGEOMETRY
|
||||
DLL_HEADER void Ng_OCC_Generate_SecondOrder (Ng_OCC_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
((OCCGeometry*)geom )->GetRefinement().MakeSecondOrder(*(Mesh*) mesh);
|
||||
}
|
||||
#endif
|
||||
// ------------------ End - Second Order Mesh generation functions ------------------
|
||||
|
||||
|
||||
|
||||
|
||||
// ------------------ Begin - Uniform Mesh Refinement functions ---------------------
|
||||
DLL_HEADER void Ng_Uniform_Refinement (Ng_Mesh * mesh)
|
||||
{
|
||||
Refinement ref;
|
||||
ref.Refine ( * (Mesh*) mesh );
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
DLL_HEADER void Ng_2D_Uniform_Refinement (Ng_Geometry_2D * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
( (SplineGeometry2d*)geom ) -> GetRefinement().Refine ( * (Mesh*) mesh );
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
DLL_HEADER void Ng_STL_Uniform_Refinement (Ng_STL_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
( (STLGeometry*)geom ) -> GetRefinement().Refine ( * (Mesh*) mesh );
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
DLL_HEADER void Ng_CSG_Uniform_Refinement (Ng_CSG_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
{
|
||||
@ -937,6 +1059,8 @@ namespace nglib
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
#ifdef OCCGEOMETRY
|
||||
DLL_HEADER void Ng_OCC_Uniform_Refinement (Ng_OCC_Geometry * geom,
|
||||
Ng_Mesh * mesh)
|
||||
@ -944,23 +1068,15 @@ namespace nglib
|
||||
( (OCCGeometry*)geom ) -> GetRefinement().Refine ( * (Mesh*) mesh );
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
// ------------------ End - Uniform Mesh Refinement functions -----------------------
|
||||
} // End of namespace nglib
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// compatibility functions:
|
||||
|
||||
namespace netgen
|
||||
{
|
||||
|
||||
char geomfilename[255];
|
||||
|
||||
DLL_HEADER void MyError (const char * ch)
|
||||
@ -968,31 +1084,45 @@ namespace netgen
|
||||
cerr << ch;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//Destination for messages, errors, ...
|
||||
DLL_HEADER void Ng_PrintDest(const char * s)
|
||||
{
|
||||
(*mycout) << s << flush;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
DLL_HEADER double GetTime ()
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void ResetTime ()
|
||||
{
|
||||
;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void MyBeep (int i)
|
||||
{
|
||||
;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void Render()
|
||||
{
|
||||
;
|
||||
}
|
||||
|
||||
} // End of namespace netgen
|
||||
|
||||
|
||||
@ -104,9 +104,9 @@ public:
|
||||
double elementspercurve; //!< Elements to generate per curvature radius
|
||||
|
||||
int closeedgeenable; //!< Enable / Disable mesh refinement at close edges
|
||||
double closeedgefact; //!< Factor to use for refinement at close edges (STL: larger => finer ; OCC: larger => coarser)
|
||||
double closeedgefact; //!< Factor to use for refinement at close edges (larger => finer)
|
||||
|
||||
int secondorder; //!< Generate second-order surface and volume elements
|
||||
int second_order; //!< Generate second-order surface and volume elements
|
||||
int quad_dominated; //!< Creates a Quad-dominated mesh
|
||||
|
||||
char * meshsize_filename; //!< Optional external mesh size file
|
||||
@ -117,6 +117,15 @@ public:
|
||||
int optsteps_3d; //!< Number of optimize steps to use for 3-D mesh optimization
|
||||
int optsteps_2d; //!< Number of optimize steps to use for 2-D mesh optimization
|
||||
|
||||
// Philippose - 13/09/2010
|
||||
// Added a couple more parameters into the meshing parameters list
|
||||
// from Netgen into Nglib
|
||||
int invert_tets; //!< Invert all the volume elements
|
||||
int invert_trigs; //!< Invert all the surface triangle elements
|
||||
|
||||
int check_overlap; //!< Check for overlapping surfaces during Surface meshing
|
||||
int check_overlapping_boundary; //!< Check for overlapping surface elements before volume meshing
|
||||
|
||||
|
||||
/*!
|
||||
Default constructor for the Mesh Parameters class
|
||||
@ -131,13 +140,17 @@ public:
|
||||
- #elementspercurve: 2.0
|
||||
- #closeedgeenable: 0
|
||||
- #closeedgefact: 2.0
|
||||
- #secondorder: 0.0
|
||||
- #secondorder: 0
|
||||
- #meshsize_filename: null
|
||||
- #quad_dominated: 0
|
||||
- #optsurfmeshenable: 1
|
||||
- #optvolmeshenable: 1
|
||||
- #optsteps_2d: 3
|
||||
- #optsteps_3d: 3
|
||||
- #invert_tets: 0
|
||||
- #invert_trigs:0
|
||||
- #check_overlap: 1
|
||||
- #check_overlapping_boundary: 1
|
||||
*/
|
||||
DLL_HEADER Ng_Meshing_Parameters();
|
||||
|
||||
@ -150,6 +163,17 @@ public:
|
||||
of the object to the default values
|
||||
*/
|
||||
DLL_HEADER void Reset_Parameters();
|
||||
|
||||
|
||||
|
||||
/*!
|
||||
Transfer local meshing parameters to internal meshing parameters
|
||||
|
||||
This member function transfers all the meshing parameters
|
||||
defined in the local meshing parameters structure of nglib into
|
||||
the internal meshing parameters structure used by the Netgen core
|
||||
*/
|
||||
DLL_HEADER void Transfer_Parameters();
|
||||
};
|
||||
|
||||
|
||||
@ -636,14 +660,10 @@ DLL_HEADER Ng_Result Ng_OCC_GetFMap(Ng_OCC_Geometry * geom,
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// **********************************************************
|
||||
// ** Mesh refinement algorithms **
|
||||
// **********************************************************
|
||||
|
||||
|
||||
// uniform mesh refinement
|
||||
DLL_HEADER void Ng_Uniform_Refinement (Ng_Mesh * mesh);
|
||||
|
||||
@ -666,4 +686,29 @@ DLL_HEADER void Ng_OCC_Uniform_Refinement (Ng_OCC_Geometry * geom,
|
||||
|
||||
|
||||
|
||||
// **********************************************************
|
||||
// ** Second Order mesh algorithms **
|
||||
// **********************************************************
|
||||
|
||||
// convert mesh to second order
|
||||
DLL_HEADER void Ng_Generate_SecondOrder (Ng_Mesh * mesh);
|
||||
|
||||
|
||||
// convert mesh to second order with geometry adaption:
|
||||
|
||||
DLL_HEADER void Ng_2D_Generate_SecondOrder (Ng_Geometry_2D * geom,
|
||||
Ng_Mesh * mesh);
|
||||
|
||||
DLL_HEADER void Ng_STL_Generate_SecondOrder (Ng_STL_Geometry * geom,
|
||||
Ng_Mesh * mesh);
|
||||
|
||||
DLL_HEADER void Ng_CSG_Generate_SecondOrder (Ng_CSG_Geometry * geom,
|
||||
Ng_Mesh * mesh);
|
||||
|
||||
#ifdef OCCGEOMETRY
|
||||
DLL_HEADER void Ng_OCC_Generate_SecondOrder (Ng_OCC_Geometry * geom,
|
||||
Ng_Mesh * mesh);
|
||||
#endif
|
||||
|
||||
|
||||
#endif // NGLIB
|
||||
|
||||
Loading…
Reference in New Issue
Block a user