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363 lines
10 KiB
C++
363 lines
10 KiB
C++
#ifndef FILE_STLTOPOLOGY
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#define FILE_STLTOPOLOGY
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/**************************************************************************/
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/* File: stltopology.hpp */
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/* Author: Joachim Schoeberl */
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/* Author2: Johannes Gerstmayr */
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/* Date: 26. Jul. 99 */
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/**************************************************************************/
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/*
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The STLTopology contains topologic information as
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triangle->point, point->triangles, triangle->edge, 2-points->edge,...
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*/
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class STLGeometry;
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#define STLBASE 1
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class STLPointIndex
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{
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int i;
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public:
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STLPointIndex () { ; }
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STLPointIndex (int ai) : i(ai) { ; }
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STLPointIndex & operator= (const STLPointIndex & ai) { i = ai.i; return *this; }
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STLPointIndex & operator= (int ai) { i = ai; return *this; }
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operator int () const { return i; }
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STLPointIndex operator++ (int) { return i++; }
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STLPointIndex operator-- (int) { return i--; }
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};
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class STLTrigIndex
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{
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int i;
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public:
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STLTrigIndex () { ; }
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STLTrigIndex (int ai) : i(ai) { ; }
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STLTrigIndex & operator= (const STLTrigIndex & ai) { i = ai.i; return *this; }
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STLTrigIndex & operator= (int ai) { i = ai; return *this; }
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operator int () const { return i; }
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STLTrigIndex operator++ (int) { return i++; }
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STLTrigIndex operator-- (int) { return i--; }
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};
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// triangle structure for loading stl files
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class STLReadTriangle
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{
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Vec<3> normal;
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Point<3> pts[3];
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public:
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STLReadTriangle (const Point<3> * apts, const Vec<3> & anormal);
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STLReadTriangle () {};
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const Point<3> & operator[] (int i) const { return pts[i]; }
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const Vec<3> & Normal() const { return normal; }
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};
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class STLTriangle
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{
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// topology edges of triangle, edge[i] opposite to point[i]
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int topedges[3];
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// neighbour triangles, trig[i] opposite to point[i]
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int nbtrigs[2][3];
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// normalized stored normal vector ??
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Vec<3> normal;
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// point numbers of triangle
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int pts[3];
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// front-side and back-side domains
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int domains[2];
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public:
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Box<3> box;
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Point<3> center;
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double rad;
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int facenum;
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struct
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{
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unsigned int toperror : 1;
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} flags;
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STLTriangle (const int * apts);
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STLTriangle () {pts[0]=0;pts[1]=0;pts[2]=0;}
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int operator[] (int i) const { return pts[i]; }
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int & operator[] (int i) { return pts[i]; }
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int EdgeNum(int i) const { return topedges[(i-1)]; }
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int & EdgeNum(int i) { return topedges[(i-1)]; }
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int NBTrig (bool side, int i) const { return nbtrigs[side][i]; }
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int & NBTrig (bool side, int i) { return nbtrigs[side][i]; }
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int Domain (bool side) const { return domains[side]; }
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int & Domain (bool side) { return domains[side]; }
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// obsolete:
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int PNum(int i) const { return pts[(i-1)]; }
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int & PNum(int i) { return pts[(i-1)]; }
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int PNumMod(int i) const { return pts[(i-1)%3]; }
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int & PNumMod(int i) { return pts[(i-1)%3]; }
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int EdgeNumMod(int i) const { return topedges[(i-1)%3]; }
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int & EdgeNumMod(int i) { return topedges[(i-1)%3]; }
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int NBTrigNum(int i) const { return nbtrigs[0][(i-1)]; }
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int & NBTrigNum(int i) { return nbtrigs[0][(i-1)]; }
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int NBTrigNumMod(int i) const { return nbtrigs[0][(i-1)%3]; }
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int & NBTrigNumMod(int i) { return nbtrigs[0][(i-1)%3]; }
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// consistently oriented neighbour:
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int IsNeighbourFrom(const STLTriangle& t) const;
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// opposite to consistently oriented neighbour:
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int IsWrongNeighbourFrom(const STLTriangle& t) const;
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///Get the two points of neighbour-Triangles in orientation of this-Triangle
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void GetNeighbourPoints(const STLTriangle& t, int& p1, int& p2) const;
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int GetNeighbourPointsAndOpposite(const STLTriangle& t, int& p1, int& p2, int& po) const;
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// NON-normalized geometry - normal vector
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Vec<3> GeomNormal(const Array<Point<3> >& ap) const;
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// Stored normal vector, normalized
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void SetNormal (const Vec<3> & n);
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const Vec<3> & Normal () const { return normal; }
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void ChangeOrientation();
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//project with a certain normal vector in plane
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void ProjectInPlain(const Array<Point<3> >& ap,
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const Vec<3> & n, Point<3> & pp) const;
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//project with the triangle's normal vector in plane
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void ProjectInPlain(const Array<Point<3> > & ap, Point<3> & pp) const;
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/*
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Project the point pp along the nproj into the plane of
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the triangle. The triangle normal is given by ntrig to
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avoid numerical instabilities.
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The local coordinates lam are defined by
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pp(input) = P1 + lam1 v1 + lam2 v2 + lam3 n
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the result is
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pp(output) = P1 + lam1 v1 + lam2 v2
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*/
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int ProjectInPlain (const Array<Point<3> >& ap,
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const Vec<3> & nproj,
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Point<3> & pp, Vec<3> & lam) const;
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int PointInside(const Array<Point<3> >& ap, const Point<3> & pp) const;
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//get nearest point on triangle and distance to it
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double GetNearestPoint(const Array<Point<3> >& ap,
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Point<3> & p3d) const;
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double Area(const Array<Point<3> >& ap) const;
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double MinHeight(const Array<Point<3> >& ap) const;
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double MaxLength(const Array<Point<3> >& ap) const;
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//max length of a side of triangle
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int GetFaceNum() {return facenum;}
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void SetFaceNum(int i) {facenum = i;}
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int HasEdge(int p1, int p2) const;
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};
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/**
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Topology Edge:
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Useful unside a face.
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A edges sharing more than 2 faces: trigs are undefined
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*/
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class STLTopEdge
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{
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int pts[2];
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int trigs[2];
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double cosangle;
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int status; // excluded, confirmed, candidate, undefined
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public:
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STLTopEdge ();
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STLTopEdge (int p1, int p2, int trig1, int trig2);
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int operator[] (int i) const { return pts[i]; }
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int & operator[] (int i) { return pts[i]; }
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int PNum(int i) const { return pts[(i-1)]; }
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int & PNum(int i) { return pts[(i-1)]; }
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int PNumMod(int i) const { return pts[(i-1)%2]; }
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int & PNumMod(int i) { return pts[(i-1)%2]; }
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int TrigNum(int i) const { return trigs[(i-1)]; }
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int & TrigNum(int i) { return trigs[(i-1)]; }
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int TrigNumMod(int i) const { return trigs[(i-1)%2]; }
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int & TrigNumMod(int i) { return trigs[(i-1)%2]; }
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void SetCosAngle (double ca) { cosangle = ca; }
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double CosAngle () const { return cosangle; }
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double Angle () const { return acos (cosangle); }
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void SetStatus (int stat) { status = stat; }
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int GetStatus () const { return status; }
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};
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ostream& operator<<(ostream& os, const STLTriangle& t);
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class STLTopology
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{
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protected:
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Array<STLTriangle> trias;
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Array<STLTopEdge> topedges;
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Array<Point<3> > points;
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// mapping of sorted pair of points to topedge
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INDEX_2_HASHTABLE<int> * ht_topedges;
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// mapping of node to trigs
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TABLE<int> trigsperpoint;
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// mapping of node to edges
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TABLE<int> topedgesperpoint;
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// searchtree for trigs and points
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BoxTree<3> * searchtree; // ADT
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Point3dTree * pointtree;
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Box<3> boundingbox;
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double pointtol;
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public:
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enum STL_GEOM_STATUS { STL_GOOD, STL_WARNING, STL_ERROR };
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protected:
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STL_GEOM_STATUS status;
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string statustext;
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bool topology_ok;
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bool orientation_ok;
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public:
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STLTopology();
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virtual ~STLTopology();
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static STLGeometry * LoadNaomi (istream & ist);
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static STLGeometry * Load (istream & ist);
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static STLGeometry * LoadBinary (istream & ist);
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void Save (const char* filename) const;
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void SaveBinary (const char* filename, const char* aname) const;
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void SaveSTLE (const char * filename) const; // stores trigs and edges
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virtual void InitSTLGeometry (const Array<STLReadTriangle> & readtrigs);
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virtual void TopologyChanged() {}; //do some things, if topology changed!
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/// Generate topology tables
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void FindNeighbourTrigs();
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void GetTrianglesInBox (const Box<3> & box,
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Array<int> & trias) const;
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int GetNP() const { return points.Size(); }
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int AddPoint(const Point<3> & p) { points.Append(p); return points.Size(); }
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const Point<3> & GetPoint(int nr) const { return points.Get(nr); }
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int GetPointNum (const Point<3> & p);
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void SetPoint(int nr, const Point<3> & p) { points.Elem(nr) = p; }
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const Array<Point<3> >& GetPoints() const { return points; }
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const Point<3> & operator[] (STLPointIndex i) const { return points[i]; }
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Point<3> & operator[] (STLPointIndex i) { return points[i]; }
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int GetNT() const { return trias.Size(); }
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void AddTriangle(const STLTriangle& t);
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const STLTriangle & GetTriangle (int nr) const { return trias.Get(nr); }
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STLTriangle & GetTriangle (int nr) { return trias.Elem(nr); }
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const STLTriangle & operator[] (STLTrigIndex i) const { return trias[i]; }
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STLTriangle & operator[] (STLTrigIndex i) { return trias[i]; }
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int GetNTE() const { return topedges.Size(); }
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const STLTopEdge & GetTopEdge (int nr) const { return topedges.Get(nr); }
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STLTopEdge & GetTopEdge (int nr) { return topedges.Elem(nr); }
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int GetTopEdgeNum (int pi1, int pi2) const;
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int NOTrigsPerPoint(int pn) { return trigsperpoint.EntrySize(pn); }
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int TrigPerPoint(int pn, int i) { return trigsperpoint.Get(pn, i); }
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int NTopEdgesPerPoint (int pn) const { return topedgesperpoint.EntrySize(pn); }
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int TopEdgePerPoint (int pn, int ei) const { return topedgesperpoint.Get(pn, ei); }
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bool Topology_Ok() const { return topology_ok; }
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bool Orientation_Ok() const { return orientation_ok; }
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STL_GEOM_STATUS GetStatus () const { return status; }
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const string & GetStatusText () const { return statustext; }
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DLL_HEADER void InvertTrig (int trig);
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DLL_HEADER void DeleteTrig (int trig);
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DLL_HEADER void OrientAfterTrig (int trig);
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// Table will be constructed, if topology is not ok
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/// neighbourtrigs for surfacetrigs
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TABLE<int> neighbourtrigs;
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/// get nr-th neighbour Triangle for triangle trig
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int NONeighbourTrigs(int trig) const { return neighbourtrigs.EntrySize(trig); }
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int NeighbourTrig(int trig, int nr) const { return neighbourtrigs.Get(trig,nr); }
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int NeighbourTrigSorted(int trig, int nr) const;
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void AddNeighbourTrig(int i, int nt) { neighbourtrigs.Add1(i, nt); }
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int GetLeftTrig (int p1, int p2) const;
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int GetRightTrig (int p1, int p2) const;
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const Box<3> & GetBoundingBox () const { return boundingbox; }
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};
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#endif
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