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Merge branch 'refactor_geo_meshing' into 'master'

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Refactor geo meshing

See merge request jschoeberl/netgen!286
This commit is contained in:
Joachim Schöberl 2019-10-28 14:57:24 +00:00
commit 7bc20691dc
15 changed files with 181 additions and 58 deletions
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2
libsrc/csg/genmesh.cpp
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@ -422,7 +422,7 @@ namespace netgen
geom.GetSurface((mesh.GetFaceDescriptor(k).SurfNr()));
Meshing2Surfaces meshing(*surf, mparam, geom.BoundingBox());
Meshing2Surfaces meshing(geom, *surf, mparam, geom.BoundingBox());
meshing.SetStartTime (starttime);
double eps = 1e-8 * geom.MaxSize();

15
libsrc/csg/meshsurf.cpp
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@ -14,13 +14,14 @@ Meshing2Surfaces :: Meshing2Surfaces (const Surface & asurface)
;
}
*/
Meshing2Surfaces :: Meshing2Surfaces (const Surface & asurf,
const MeshingParameters & mp,
const Box<3> & abb)
: Meshing2(mp, abb), surface(asurf), mparam (mp)
{
;
}
Meshing2Surfaces :: Meshing2Surfaces (const CSGeometry& geo,
const Surface & asurf,
const MeshingParameters & mp,
const Box<3> & abb)
: Meshing2(geo, mp, abb), surface(asurf), mparam (mp)
{
;
}
void Meshing2Surfaces :: DefineTransformation (const Point<3> & p1, const Point<3> & p2,

4
libsrc/csg/meshsurf.hpp
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@ -16,7 +16,9 @@ namespace netgen
///
// Meshing2Surfaces (const Surface & asurf);
///
Meshing2Surfaces (const Surface & asurf, const MeshingParameters & mp,
Meshing2Surfaces (const CSGeometry& geo,
const Surface & asurf,
const MeshingParameters & mp,
const Box<3> & aboundingbox);
protected:

2
libsrc/geom2d/genmesh2d.cpp
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@ -565,7 +565,7 @@ namespace netgen
mp.quad = hquad || geometry.GetDomainQuadMeshing (domnr);
Meshing2 meshing (mp, Box<3> (pmin, pmax));
Meshing2 meshing (geometry, mp, Box<3> (pmin, pmax));
NgArray<int, PointIndex::BASE> compress(bnp);
compress = -1;

1
libsrc/meshing/CMakeLists.txt
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@ -37,5 +37,6 @@ install(FILES
localh.hpp meshclass.hpp meshfunc.hpp meshing2.hpp meshing3.hpp
meshing.hpp meshtool.hpp meshtype.hpp msghandler.hpp paralleltop.hpp
ruler2.hpp ruler3.hpp specials.hpp topology.hpp validate.hpp
python_mesh.hpp
DESTINATION ${NG_INSTALL_DIR_INCLUDE}/meshing COMPONENT netgen_devel
)

84
libsrc/meshing/basegeom.cpp
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@ -10,7 +10,89 @@ namespace netgen
GeometryRegister :: ~GeometryRegister()
{ ; }
void NetgenGeometry :: OptimizeSurface(Mesh& mesh, const MeshingParameters& mparam)
void NetgenGeometry :: Analyse(Mesh& mesh,
const MeshingParameters& mparam) const
{
static Timer t1("SetLocalMeshsize"); RegionTimer regt(t1);
mesh.SetGlobalH(mparam.maxh);
mesh.SetMinimalH(mparam.minh);
mesh.SetLocalH(bounding_box.PMin(), bounding_box.PMax(),
mparam.grading);
if(mparam.uselocalh)
RestrictLocalMeshsize(mesh, mparam);
mesh.LoadLocalMeshSize(mparam.meshsizefilename);
}
void NetgenGeometry :: FindEdges(Mesh& mesh,
const MeshingParameters& mparam) const
{
}
void NetgenGeometry :: MeshSurface(Mesh& mesh,
const MeshingParameters& mparam) const
{
static Timer t1("Surface Meshing"); RegionTimer regt(t1);
Array<int, PointIndex> glob2loc(mesh.GetNP());
for(auto k : Range(faces))
{
const auto& face = *faces[k];
auto bb = face.GetBoundingBox();
bb.Increase(bb.Diam()/10);
Meshing2 meshing(*this, mparam, bb);
glob2loc = 0;
int cntp = 0;
for(auto& seg : mesh.LineSegments())
{
if(seg.si == k+1)
{
for(auto j : Range(2))
{
auto pi = seg[j];
if(glob2loc[pi] == 0)
{
meshing.AddPoint(mesh[pi], pi);
cntp++;
glob2loc[pi] = cntp;
}
}
}
}
for(auto & seg : mesh.LineSegments())
{
if(seg.si == k+1)
{
PointGeomInfo gi0, gi1;
gi0.trignum = gi1.trignum = k+1;
gi0.u = seg.epgeominfo[0].u;
gi0.v = seg.epgeominfo[0].v;
gi1.u = seg.epgeominfo[1].u;
gi1.v = seg.epgeominfo[1].v;
meshing.AddBoundaryElement(glob2loc[seg[0]],
glob2loc[seg[1]],
gi0, gi1);
}
}
// TODO Set max area 2* area of face
auto noldsurfels = mesh.GetNSE();
static Timer t("GenerateMesh"); RegionTimer reg(t);
MESHING2_RESULT res = meshing.GenerateMesh(mesh, mparam, mparam.maxh, k+1);
for(auto i : Range(noldsurfels, mesh.GetNSE()))
{
mesh.SurfaceElements()[i].SetIndex(k+1);
}
}
}
void NetgenGeometry :: OptimizeSurface(Mesh& mesh, const MeshingParameters& mparam) const
{
const auto savetask = multithread.task;
multithread.task = "Optimizing surface";

30
libsrc/meshing/basegeom.hpp
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@ -12,10 +12,30 @@ struct Tcl_Interp;
namespace netgen
{
class GeometryEdge
{
public:
virtual ~GeometryEdge() {}
};
class GeometryFace
{
public:
virtual ~GeometryFace() {}
virtual size_t GetNBoundaries() const = 0;
virtual Array<GeometryEdge> GetBoundary(size_t index) const = 0;
// Project point using geo info. Fast if point is close to
// parametrization in geo info.
virtual bool ProjectPointGI(Point<3>& p, PointGeomInfo& gi) const =0;
virtual Box<3> GetBoundingBox() const = 0;
};
class DLL_HEADER NetgenGeometry
{
unique_ptr<Refinement> ref;
protected:
Array<unique_ptr<GeometryFace>> faces;
Box<3> bounding_box;
public:
NetgenGeometry()
{
@ -35,10 +55,12 @@ namespace netgen
virtual Mesh::GEOM_TYPE GetGeomType() const { return Mesh::NO_GEOM; }
virtual void Analyse(Mesh& mesh,
const MeshingParameters& mparam) {}
virtual void FindEdges(Mesh& mesh, const MeshingParameters& mparam) {}
virtual void MeshSurface(Mesh& mesh, const MeshingParameters& mparam) {}
virtual void OptimizeSurface(Mesh& mesh, const MeshingParameters& mparam);
const MeshingParameters& mparam) const;
virtual void RestrictLocalMeshsize(Mesh& mesh,
const MeshingParameters& mparam) const {}
virtual void FindEdges(Mesh& mesh, const MeshingParameters& mparam) const;
virtual void MeshSurface(Mesh& mesh, const MeshingParameters& mparam) const;
virtual void OptimizeSurface(Mesh& mesh, const MeshingParameters& mparam) const;
virtual void FinalizeMesh(Mesh& mesh) const {}

56
libsrc/meshing/meshing2.cpp
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@ -38,8 +38,10 @@ namespace netgen
static Array<unique_ptr<netrule>> global_quad_rules;
Meshing2 :: Meshing2 (const MeshingParameters & mp, const Box<3> & aboundingbox)
: adfront(aboundingbox), boundingbox(aboundingbox)
Meshing2 :: Meshing2 (const NetgenGeometry& ageo,
const MeshingParameters & mp,
const Box<3> & aboundingbox)
: geo(ageo), adfront(aboundingbox), boundingbox(aboundingbox)
{
static Timer t("Mesing2::Meshing2"); RegionTimer r(t);
@ -133,29 +135,38 @@ namespace netgen
// static Vec3d ex, ey;
// static Point3d globp1;
void Meshing2 :: DefineTransformation (const Point<3> & p1, const Point<3> & p2,
const PointGeomInfo * geominfo1,
const PointGeomInfo * geominfo2)
void Meshing2 :: DefineTransformation (const Point<3> & ap1,
const Point<3> & ap2,
const PointGeomInfo * gi1,
const PointGeomInfo * gi2)
{
globp1 = p1;
ex = p2 - p1;
ex /= ex.Length();
ey.X() = -ex.Y();
ey.Y() = ex.X();
ey.Z() = 0;
p1 = ap1;
p2 = ap2;
auto n1 = geo.GetNormal(gi1->trignum, p1, *gi1);
auto n2 = geo.GetNormal(gi2->trignum, p2, *gi2);
ez = 0.5 * (n1+n2);
ez.Normalize();
ex = (p2-p1).Normalize();
ez -= (ez*ex)*ex;
ez.Normalize();
ey = Cross(ez, ex);
}
void Meshing2 :: TransformToPlain (const Point<3> & locpoint,
const MultiPointGeomInfo & geominf,
const MultiPointGeomInfo & geominfo,
Point<2> & plainpoint, double h, int & zone)
{
Vec3d p1p (globp1, locpoint);
auto& gi = geominfo.GetPGI(1);
auto n = geo.GetNormal(gi.trignum, locpoint, gi);
auto p1p = locpoint - p1;
plainpoint(0) = (p1p * ex) / h;
plainpoint(1) = (p1p * ey) / h;
// p1p = locpoint - globp1;
p1p /= h;
plainpoint[0] = p1p * ex;
plainpoint[1] = p1p * ey;
zone = 0;
if(n*ez < 0)
zone = -1;
else
zone = 0;
}
int Meshing2 :: TransformFromPlain (const Point<2> & plainpoint,
@ -163,12 +174,9 @@ namespace netgen
PointGeomInfo & gi,
double h)
{
Vec3d p1p;
gi.trignum = 1;
p1p = plainpoint[0] * ex + plainpoint[1] * ey;
p1p *= h;
locpoint = globp1 + p1p;
locpoint = p1 + (h*plainpoint(0)) * ex + (h* plainpoint(1)) * ey;
if (!geo.ProjectPointGI(gi.trignum, locpoint, gi))
geo.ProjectPoint(gi.trignum, locpoint);
return 0;
}

10
libsrc/meshing/meshing2.hpp
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@ -41,12 +41,16 @@ class Meshing2
///
double maxarea;
Vec3d ex, ey;
Point3d globp1;
Vec3d ex, ey, ez;
Point<3> p1, p2;
const NetgenGeometry& geo;
public:
///
DLL_HEADER Meshing2 (const MeshingParameters & mp, const Box<3> & aboundingbox);
DLL_HEADER Meshing2 (const NetgenGeometry& geo,
const MeshingParameters & mp,
const Box<3> & aboundingbox);
///
DLL_HEADER virtual ~Meshing2 ();

6
libsrc/occ/occgenmesh.cpp
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@ -306,7 +306,7 @@ namespace netgen
void OCCFindEdges (OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam)
void OCCFindEdges (const OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam)
{
static Timer t("OCCFindEdges"); RegionTimer r(t);
static Timer tsearch("OCCFindEdges - search point");
@ -601,7 +601,7 @@ namespace netgen
void OCCMeshSurface (OCCGeometry & geom, Mesh & mesh,
void OCCMeshSurface (const OCCGeometry & geom, Mesh & mesh,
const MeshingParameters & mparam)
{
static Timer t("OCCMeshSurface"); RegionTimer r(t);
@ -651,7 +651,7 @@ namespace netgen
static Timer tinit("init");
tinit.Start();
Meshing2OCCSurfaces meshing(TopoDS::Face(geom.fmap(k)), bb, projecttype, mparam);
Meshing2OCCSurfaces meshing(geom, TopoDS::Face(geom.fmap(k)), bb, projecttype, mparam);
tinit.Stop();

6
libsrc/occ/occgeom.cpp
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@ -75,19 +75,19 @@ void STEP_GetEntityName(const TopoDS_Shape & theShape, STEPCAFControl_Reader * a
}
void OCCGeometry :: Analyse(Mesh& mesh,
const MeshingParameters& mparam)
const MeshingParameters& mparam) const
{
OCCSetLocalMeshSize(*this, mesh, mparam, occparam);
}
void OCCGeometry :: FindEdges(Mesh& mesh,
const MeshingParameters& mparam)
const MeshingParameters& mparam) const
{
OCCFindEdges(*this, mesh, mparam);
}
void OCCGeometry :: MeshSurface(Mesh& mesh,
const MeshingParameters& mparam)
const MeshingParameters& mparam) const
{
OCCMeshSurface(*this, mesh, mparam);
}

12
libsrc/occ/occgeom.hpp
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@ -224,7 +224,7 @@ namespace netgen
Handle_XCAFDoc_ColorTool face_colours;
mutable int changed;
NgArray<int> facemeshstatus;
mutable NgArray<int> facemeshstatus;
// Philippose - 15/01/2009
// Maximum mesh size for a given face
@ -268,11 +268,11 @@ namespace netgen
{ occparam = par; }
void Analyse(Mesh& mesh,
const MeshingParameters& mparam) override;
const MeshingParameters& mparam) const override;
void FindEdges(Mesh& mesh,
const MeshingParameters& mparam) override;
const MeshingParameters& mparam) const override;
void MeshSurface(Mesh& mesh,
const MeshingParameters& mparam) override;
const MeshingParameters& mparam) const override;
void FinalizeMesh(Mesh& mesh) const override;
@ -459,11 +459,11 @@ namespace netgen
DLL_HEADER extern void OCCSetLocalMeshSize(const OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam,
const OCCParameters& occparam);
DLL_HEADER extern void OCCMeshSurface (OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam);
DLL_HEADER extern void OCCMeshSurface (const OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam);
DLL_HEADER extern void OCCOptimizeSurface (OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam);
DLL_HEADER extern void OCCFindEdges (OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam);
DLL_HEADER extern void OCCFindEdges (const OCCGeometry & geom, Mesh & mesh, const MeshingParameters & mparam);
}
#endif

6
libsrc/occ/occmeshsurf.cpp
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@ -492,10 +492,12 @@ namespace netgen
}
Meshing2OCCSurfaces :: Meshing2OCCSurfaces (const TopoDS_Shape & asurf,
Meshing2OCCSurfaces :: Meshing2OCCSurfaces (const NetgenGeometry& geo,
const TopoDS_Shape & asurf,
const Box<3> & abb, int aprojecttype,
const MeshingParameters & mparam)
: Meshing2(mparam, Box<3>(abb.PMin(), abb.PMax())), surface(TopoDS::Face(asurf), aprojecttype)
: Meshing2(geo, mparam, Box<3>(abb.PMin(), abb.PMax())),
surface(TopoDS::Face(asurf), aprojecttype)
{
;
}

3
libsrc/occ/occmeshsurf.hpp
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@ -113,7 +113,8 @@ class Meshing2OCCSurfaces : public Meshing2
public:
///
Meshing2OCCSurfaces (const TopoDS_Shape & asurf, const Box<3> & aboundingbox,
Meshing2OCCSurfaces (const NetgenGeometry& geo,
const TopoDS_Shape & asurf, const Box<3> & aboundingbox,
int aprojecttype, const MeshingParameters & mparam);
///

2
libsrc/stlgeom/meshstlsurface.cpp
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@ -897,7 +897,7 @@ void STLSurfaceOptimization (STLGeometry & geom,
MeshingSTLSurface :: MeshingSTLSurface (STLGeometry & ageom,
const MeshingParameters & mp)
: Meshing2(mp, ageom.GetBoundingBox()), geom(ageom)
: Meshing2(ageom, mp, ageom.GetBoundingBox()), geom(ageom)
{
;
}