netgen/libsrc/meshing/meshing2.hpp

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#ifndef FILE_MESHING2
#define FILE_MESHING2
/**************************************************************************/
/* File: meshing2.hpp */
/* Author: Joachim Schoeberl */
/* Date: 01. Okt. 95 */
/**************************************************************************/
enum MESHING2_RESULT
{
MESHING2_OK = 0,
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MESHING2_GIVEUP = 1
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};
/*
The basis class for 2D mesh generation.
Has the method GenerateMesh
For surface mesh generation, or non-Euklidean meshing,
derive from Meshing2, and replace transformation.
*/
class Meshing2
{
/// the current advancing front
AdFront2 * adfront;
/// rules for mesh generation
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Array<netrule*> rules;
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/// statistics
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Array<int> ruleused, canuse, foundmap;
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///
Box<3> boundingbox;
///
double starttime;
///
double maxarea;
public:
///
Meshing2 (const Box<3> & aboundingbox);
///
virtual ~Meshing2 ();
/// Load rules, either from file, or compiled rules
void LoadRules (const char * filename);
///
MESHING2_RESULT GenerateMesh (Mesh & mesh, double gh, int facenr);
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void Delaunay (Mesh & mesh, int domainnr, const MeshingParameters & mp);
void BlockFillLocalH (Mesh & mesh, const MeshingParameters & mp);
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///
void AddPoint (const Point3d & p, PointIndex globind, MultiPointGeomInfo * mgi = NULL,
bool pointonsurface = true);
///
void AddBoundaryElement (INDEX i1, INDEX i2,
const PointGeomInfo & gi1, const PointGeomInfo & gi2);
///
void SetStartTime (double astarttime);
///
void SetMaxArea (double amaxarea);
protected:
///
virtual void StartMesh ();
///
virtual void EndMesh ();
///
virtual double CalcLocalH (const Point3d & p, double gh) const;
///
virtual void DefineTransformation (const Point3d & p1, const Point3d & p2,
const PointGeomInfo * geominfo1,
const PointGeomInfo * geominfo2);
///
virtual void TransformToPlain (const Point3d & locpoint, const MultiPointGeomInfo & geominfo,
Point2d & plainpoint, double h, int & zone);
/// return 0 .. ok
/// return >0 .. cannot transform point to true surface
virtual int TransformFromPlain (Point2d & plainpoint,
Point3d & locpoint,
PointGeomInfo & geominfo,
double h);
/// projects to surface
/// return 0 .. ok
virtual int BelongsToActiveChart (const Point3d & p,
const PointGeomInfo & gi);
/// computes geoinfo data for line with respect to
/// selected chart
virtual int ComputePointGeomInfo (const Point3d & p,
PointGeomInfo & gi);
/// Tries to select unique geominfo on active chart
/// return 0: success
/// return 1: failed
virtual int ChooseChartPointGeomInfo (const MultiPointGeomInfo & mpgi,
PointGeomInfo & pgi);
/*
tests, whether endpoint (= 1 or 2) of line segment p1-p2
is inside of the selected chart. The endpoint must be on the
chart
*/
virtual int IsLineVertexOnChart (const Point3d & p1, const Point3d & p2,
int endpoint, const PointGeomInfo & geominfo);
/*
get (projected) boundary of current chart
*/
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virtual void GetChartBoundary (Array<Point2d> & points,
Array<Point3d> & points3d,
Array<INDEX_2> & lines, double p) const;
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virtual double Area () const;
/** Applies 2D rules.
Tests all 2D rules */
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int ApplyRules (Array<Point2d> & lpoints,
Array<int> & legalpoints,
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int maxlegalpoint,
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Array<INDEX_2> & llines,
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int maxlegelline,
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Array<Element2d> & elements, Array<INDEX> & dellines,
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int tolerance);
};
#endif