netgen/libsrc/meshing/basegeom.hpp

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#ifndef FILE_BASEGEOM
#define FILE_BASEGEOM
/**************************************************************************/
/* File: basegeom.hpp */
/* Author: Joachim Schoeberl */
/* Date: 23. Aug. 09 */
/**************************************************************************/
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struct Tcl_Interp;
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namespace netgen
{
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struct ShapeProperties
{
optional<string> name;
optional<Vec<4>> col;
double maxh = 1e99;
double hpref = 0; // number of hp refinement levels (will be multiplied by factor later)
void Merge(const ShapeProperties & prop2)
{
if (prop2.name) name = prop2.name;
if (prop2.col) col = prop2.col;
maxh = min2(maxh, prop2.maxh);
hpref = max2(hpref, prop2.hpref);
}
string GetName() const { return name ? *name : "default"; }
Vec<4> GetColor() { return col ? *col : Vec<4>{0., 1., 0., 1.}; }
void DoArchive(Archive& ar)
{
ar & name & col & maxh & hpref;
}
};
class GeometryShape;
struct ShapeIdentification
{
GeometryShape * from;
GeometryShape * to;
Transformation<3> trafo;
Identifications::ID_TYPE type;
string name = "";
};
class DLL_HEADER GeometryShape
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{
public:
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int nr = -1;
ShapeProperties properties;
Array<ShapeIdentification> identifications;
GeometryShape * primary;
Transformation<3> primary_to_me;
virtual ~GeometryShape() {}
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virtual size_t GetHash() const = 0;
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virtual bool IsMappedShape( const GeometryShape & other, const Transformation<3> & trafo, double tolerance ) const;
};
class DLL_HEADER GeometryVertex : public GeometryShape
{
public:
virtual Point<3> GetPoint() const = 0;
virtual bool IsMappedShape( const GeometryShape & other, const Transformation<3> & trafo, double tolerance ) const override;
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};
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class DLL_HEADER GeometryEdge : public GeometryShape
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{
public:
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virtual const GeometryVertex& GetStartVertex() const = 0;
virtual const GeometryVertex& GetEndVertex() const = 0;
virtual double GetLength() const = 0;
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virtual Point<3> GetCenter() const = 0;
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virtual Point<3> GetPoint(double t) const = 0;
// Calculate parameter step respecting edges sag value
virtual double CalcStep(double t, double sag) const = 0;
virtual void ProjectPoint(Point<3>& p, EdgePointGeomInfo* gi) const = 0;
virtual void PointBetween(const Point<3>& p1,
const Point<3>& p2,
double secpoint,
const EdgePointGeomInfo& gi1,
const EdgePointGeomInfo& gi2,
Point<3>& newp,
EdgePointGeomInfo& newgi) const
{
newp = p1 + secpoint * (p2-p1);
newgi = gi1;
ProjectPoint(newp, &newgi);
}
virtual Vec<3> GetTangent(double t) const = 0;
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virtual bool IsMappedShape( const GeometryShape & other, const Transformation<3> & trafo, double tolerance ) const override;
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};
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class DLL_HEADER GeometryFace : public GeometryShape
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{
public:
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int domin=-1, domout=-1;
virtual Point<3> GetCenter() const = 0;
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virtual size_t GetNBoundaries() const = 0;
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virtual Array<Segment> GetBoundary(const Mesh& mesh) const = 0;
virtual PointGeomInfo Project(Point<3>& p) const = 0;
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// 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 bool CalcPointGeomInfo(const Point<3>& p, PointGeomInfo& gi) const
{
auto pnew = p;
gi = Project(pnew);
return (p-pnew).Length() < 1e-10 * GetBoundingBox().Diam() ;
}
virtual Point<3> GetPoint(const PointGeomInfo& gi) const = 0;
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virtual void CalcEdgePointGI(const GeometryEdge& edge,
double t,
EdgePointGeomInfo& egi) const = 0;
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virtual Box<3> GetBoundingBox() const = 0;
// Get curvature in point from local coordinates in PointGeomInfo
virtual double GetCurvature(const PointGeomInfo& gi) const = 0;
virtual void RestrictH(Mesh& mesh, const MeshingParameters& mparam) const = 0;
virtual Vec<3> GetNormal(const Point<3>& p, const PointGeomInfo* gi = nullptr) const = 0;
virtual void PointBetween(const Point<3>& p1,
const Point<3>& p2,
double secpoint,
const PointGeomInfo& gi1,
const PointGeomInfo& gi2,
Point<3>& newp,
PointGeomInfo& newgi) const
{
newp = p1 + secpoint * (p2-p1);
newgi.trignum = gi1.trignum;
newgi.u = 0.5 * (gi1.u + gi1.u);
newgi.v = 0.5 * (gi1.v + gi2.v);
if(!ProjectPointGI(newp, newgi))
newgi = Project(newp);
}
protected:
void RestrictHTrig(Mesh& mesh,
const PointGeomInfo& gi0,
const PointGeomInfo& gi1,
const PointGeomInfo& gi2,
const MeshingParameters& mparam,
int depth = 0, double h = 0.) const;
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};
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class DLL_HEADER GeometrySolid : public GeometryShape
{ };
class DLL_HEADER NetgenGeometry
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{
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unique_ptr<Refinement> ref;
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protected:
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Array<unique_ptr<GeometryVertex>> vertices;
Array<unique_ptr<GeometryEdge>> edges;
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Array<unique_ptr<GeometryFace>> faces;
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Array<unique_ptr<GeometrySolid>> solids;
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Array<std::pair<Point<3>, double>> restricted_h;
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Box<3> bounding_box;
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int dimension = 3;
std::map<size_t, GeometryVertex*> vertex_map;
std::map<size_t, GeometryEdge*> edge_map;
std::map<size_t, GeometryFace*> face_map;
std::map<size_t, GeometrySolid*> solid_map;
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public:
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NetgenGeometry()
{
ref = make_unique<Refinement>(*this);
}
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virtual ~NetgenGeometry () { ; }
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size_t GetNVertices() const { return vertices.Size(); }
size_t GetNEdges() const { return edges.Size(); }
size_t GetNFaces() const { return faces.Size(); }
const GeometryFace & GetFace(int i) const { return *faces[i]; }
virtual int GenerateMesh (shared_ptr<Mesh> & mesh, MeshingParameters & mparam);
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void RestrictH(const Point<3>& pnt, double maxh)
{
restricted_h.Append({pnt, maxh});
}
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virtual const Refinement & GetRefinement () const
{
return *ref;
}
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virtual void DoArchive(Archive&)
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{ throw NgException("DoArchive not implemented for " + Demangle(typeid(*this).name())); }
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virtual Mesh::GEOM_TYPE GetGeomType() const { return Mesh::NO_GEOM; }
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virtual void ProcessIdentifications();
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virtual void Analyse(Mesh& mesh,
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const MeshingParameters& mparam) const;
virtual void FindEdges(Mesh& mesh, const MeshingParameters& mparam) const;
virtual void MeshSurface(Mesh& mesh, const MeshingParameters& mparam) const;
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virtual bool MeshFace(Mesh& mesh, const MeshingParameters& mparam,
int nr, FlatArray<int, PointIndex> glob2loc) const;
virtual void MapSurfaceMesh( Mesh & mesh, const GeometryFace & dst ) const;
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virtual void OptimizeSurface(Mesh& mesh, const MeshingParameters& mparam) const;
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virtual void FinalizeMesh(Mesh& mesh) const;
virtual PointGeomInfo ProjectPoint (int surfind, Point<3> & p) const
{
return faces[surfind-1]->Project(p);
}
virtual void ProjectPointEdge (int surfind, int surfind2, Point<3> & p, EdgePointGeomInfo* gi = nullptr) const
{
edges[gi->edgenr]->ProjectPoint(p, gi);
}
virtual bool CalcPointGeomInfo(int surfind, PointGeomInfo& gi, const Point<3> & p3) const
{
return faces[surfind-1]->CalcPointGeomInfo(p3, gi);
}
virtual bool ProjectPointGI (int surfind, Point<3> & p, PointGeomInfo & gi) const
{
return faces[surfind-1]->ProjectPointGI(p, gi);
}
virtual Vec<3> GetNormal(int surfind, const Point<3> & p, const PointGeomInfo* gi = nullptr) const
{ return faces[surfind-1]->GetNormal(p, gi); }
virtual void PointBetween (const Point<3> & p1,
const Point<3> & p2, double secpoint,
int surfi,
const PointGeomInfo & gi1,
const PointGeomInfo & gi2,
Point<3> & newp,
PointGeomInfo & newgi) const
{
if(faces.Size())
{
faces[surfi-1]->PointBetween(p1, p2, secpoint, gi1, gi2, newp, newgi);
return;
}
newp = p1 + secpoint * (p2-p1);
}
virtual void PointBetweenEdge(const Point<3> & p1,
const Point<3> & p2, double secpoint,
int surfi1, int surfi2,
const EdgePointGeomInfo & ap1,
const EdgePointGeomInfo & ap2,
Point<3> & newp,
EdgePointGeomInfo & newgi) const
{
if(edges.Size())
{
edges[ap1.edgenr]->PointBetween(p1, p2, secpoint,
ap1, ap2, newp, newgi);
return;
}
newp = p1+secpoint*(p2-p1);
}
virtual Vec<3> GetTangent(const Point<3> & p, int surfi1,
int surfi2,
const EdgePointGeomInfo & egi) const
{
throw Exception("Base geometry get tangent called");
}
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virtual size_t GetEdgeIndex(const GeometryEdge& edge) const
{
for(auto i : Range(edges))
if(edge.GetHash() == edges[i]->GetHash())
return i;
throw Exception("Couldn't find edge index");
}
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virtual void Save (string filename) const;
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virtual void SaveToMeshFile (ostream & /* ost */) const { ; }
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};
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class DLL_HEADER GeometryRegister
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{
public:
virtual ~GeometryRegister();
virtual NetgenGeometry * Load (string filename) const = 0;
virtual NetgenGeometry * LoadFromMeshFile (istream & /* ist */, string) const { return NULL; }
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virtual class VisualScene * GetVisualScene (const NetgenGeometry * /* geom */) const
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{ return NULL; }
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virtual void SetParameters (Tcl_Interp * /* interp */) { ; }
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};
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class DLL_HEADER GeometryRegisterArray : public NgArray<GeometryRegister*>
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{
public:
virtual ~GeometryRegisterArray()
{
for (int i = 0; i < Size(); i++)
delete (*this)[i];
}
virtual shared_ptr<NetgenGeometry> LoadFromMeshFile (istream & ist) const;
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};
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// extern DLL_HEADER NgArray<GeometryRegister*> geometryregister;
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extern DLL_HEADER GeometryRegisterArray geometryregister;
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}
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#endif