mirror of
https://github.com/NGSolve/netgen.git
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323 lines
9.0 KiB
C++
323 lines
9.0 KiB
C++
#ifndef FILE_STLTOOL
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#define FILE_STLTOOL
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//#include "gprim/gprim.hh"
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/**************************************************************************/
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/* File: stlgeom.hh */
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/* Author: Joachim Schoeberl */
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/* Author2: Johannes Gerstmayr */
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/* Date: 20. Nov. 99 */
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/**************************************************************************/
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namespace netgen {
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// use one normal vector for whole chart
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extern int usechartnormal;
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extern int chartdebug;
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extern int geomsearchtreeon;
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extern int AddPointIfNotExists(NgArray<Point3d>& ap, const Point3d& p, double eps = 1e-8);
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//get distance from line lp1-lp2 to point p
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extern double GetDistFromLine(const Point<3>& lp1, const Point<3>& lp2, Point<3>& p);
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extern double GetDistFromInfiniteLine(const Point<3>& lp1, const Point<3>& lp2, const Point<3>& p);
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extern void FIOReadInt(istream& ios, int& i);
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extern void FIOWriteInt(ostream& ios, const int& i);
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extern void FIOReadDouble(istream& ios, double& i);
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extern void FIOWriteDouble(ostream& ios, const double& i);
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extern void FIOReadFloat(istream& ios, float& i);
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extern void FIOWriteFloat(ostream& ios, const float& i);
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extern void FIOReadString(istream& ios, char* str, int len);
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extern void FIOReadStringE(istream& ios, char* str, int len);
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extern void FIOWriteString(ostream& ios, char* str, int len);
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typedef NgArray <int> * ArrayINTPTR;
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class STLGeometry;
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class STLParameters;
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// typedef int ChartId
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class ChartId
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{
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int i;
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public:
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class t_invalid { public: constexpr t_invalid() = default; };
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static constexpr t_invalid INVALID{};
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ChartId() { }
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constexpr ChartId(t_invalid inv) : i(0) { ; }
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constexpr ChartId(int ai) : i(ai) { }
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operator int() const { return i; }
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ChartId operator++ (int) { ChartId hi(*this); i++; return hi; }
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ChartId & operator++ () { i++; return *this; }
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};
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}
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namespace ngcore
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{
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template<>
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constexpr netgen::ChartId IndexBASE<netgen::ChartId> () { return netgen::ChartId(1); }
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}
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namespace netgen {
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class STLChart
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{
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private:
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STLGeometry * geometry;
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Array<STLTrigId> charttrigs; // trigs which only belong to this chart
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Array<STLTrigId> outertrigs; // trigs which belong to other charts
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BoxTree<3,STLTrigId> * searchtree; // ADT containing outer trigs
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NgArray<twoint> olimit; //outer limit of outer chart
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NgArray<twoint> ilimit; //outer limit of inner chart
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const STLParameters& stlparam;
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public:
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STLChart(STLGeometry * ageometry, const STLParameters& astlparam);
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~STLChart();
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void AddChartTrig(STLTrigId i);
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void AddOuterTrig(STLTrigId i);
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bool IsInWholeChart(int nr) const;
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STLTrigId GetChartTrig1(int i) const {return charttrigs[i-1];}
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STLTrigId GetOuterTrig1(int i) const {return outertrigs[i-1];}
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//get all trigs:
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STLTrigId GetTrig1(int i) const
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{
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if (i <= charttrigs.Size()) {return charttrigs[i-1];}
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else {return outertrigs[i-charttrigs.Size()-1];}
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}
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size_t GetNChartT() const {return charttrigs.Size();}
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size_t GetNOuterT() const {return outertrigs.Size();}
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size_t GetNT() const {return charttrigs.Size()+outertrigs.Size(); }
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void GetTrianglesInBox (const Point3d & pmin,
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const Point3d & pmax,
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NgArray<STLTrigId> & trias) const;
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void AddOLimit(twoint l) {olimit.Append(l);}
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void AddILimit(twoint l) {ilimit.Append(l);}
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void ClearOLimit() {olimit.SetSize(0);}
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void ClearILimit() {ilimit.SetSize(0);}
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size_t GetNOLimit() const {return olimit.Size();}
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size_t GetNILimit() const {return ilimit.Size();}
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twoint GetOLimit(int i) const {return olimit.Get(i);}
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twoint GetILimit(int i) const {return ilimit.Get(i);}
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//move triangles trigs (local chart-trig numbers) to outer chart
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void MoveToOuterChart(const NgArray<int>& trigs);
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void DelChartTrigs(const NgArray<int>& trigs);
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// define local coordinate system, JS:
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private:
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Vec<3> normal;
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Point<3> pref;
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Vec<3> t1, t2;
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public:
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void SetNormal (const Point<3> & apref, const Vec<3> & anormal);
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const Vec<3> & GetNormal () const { return normal; }
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Point<2> Project2d (const Point<3> & p3d) const
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{
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Vec<3> v = p3d-pref;
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return Point<2> (t1 * v, t2 * v);
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}
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};
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class STLBoundarySeg
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{
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Point<3> p1, p2, center;
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Point<2> p2d1, p2d2;
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Box<2> boundingbox;
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// Point<2> p2dmin, p2dmax;
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double rad;
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STLPointId i1, i2;
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int smoothedge;
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public:
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STLBoundarySeg () { ; }
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STLBoundarySeg (STLPointId ai1, STLPointId ai2, const Array<Point<3>,STLPointId> & points,
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const STLChart * chart)
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: p1(points[ai1]), p2(points[ai2]),
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i1(ai1), i2(ai2)
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{
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center = ::netgen::Center (p1, p2);
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rad = Dist (p1, center);
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p2d1 = chart->Project2d (p1);
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p2d2 = chart->Project2d (p2);
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boundingbox.Set (p2d1);
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boundingbox.Add (p2d2);
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}
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int operator== (const STLBoundarySeg & s2) const
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{ return i1 == s2.i1 && i2 == s2.i2; }
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void Swap ();
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int I1() const { return i1; }
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int I2() const { return i2; }
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const Point<3> & P1() const { return p1; }
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const Point<3> & P2() const { return p2; }
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const Point<2> & P2D1() const { return p2d1; }
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const Point<2> & P2D2() const { return p2d2; }
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const Point<2> & P2DMin() const { return boundingbox.PMin(); }
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const Point<2> & P2DMax() const { return boundingbox.PMax(); }
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const Point<3> & Center() const { return center; }
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const Box<2> & BoundingBox() const { return boundingbox; }
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double Radius () const { return rad; }
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void SetSmoothEdge (int se) { smoothedge = se; }
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int IsSmoothEdge () const { return smoothedge; }
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friend class STLBoundary;
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};
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class STLBoundary
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{
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private:
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STLGeometry * geometry;
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const STLChart * chart;
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NgArray<STLBoundarySeg> boundary;
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ClosedHashTable<INDEX_2, STLBoundarySeg> boundary_ht;
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BoxTree<2,INDEX_2> * searchtree = nullptr;
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public:
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STLBoundary(STLGeometry * ageometry);
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~STLBoundary() { delete searchtree; }
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void Clear() {boundary.SetSize(0); boundary_ht = ClosedHashTable<INDEX_2,STLBoundarySeg>(); }
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void SetChart (const STLChart * achart) { chart = achart; }
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//don't check, if already exists!
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void AddNewSegment(const STLBoundarySeg & seg) {boundary.Append(seg);};
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//check if segment exists
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void AddOrDelSegment(const STLBoundarySeg & seg);
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//addordelsegment for all 3 triangle segments!
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void AddTriangle(const STLTriangle & t);
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int NOSegments() {return boundary.Size();};
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const STLBoundarySeg & GetSegment(int i) {return boundary.Get(i);}
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void BuildSearchTree();
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void DeleteSearchTree();
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bool TestSeg(const Point<3> & p1, const Point<3> & p2, const Vec<3> & sn,
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double sinchartangle, int divisions, Array<Point<3>,STLPointId>& points,
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double eps);
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bool TestSegChartNV(const Point3d& p1, const Point3d& p2, const Vec3d& sn);
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};
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class STLDoctorParams
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{
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public:
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int drawmeshededges;
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double geom_tol_fact;
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double longlinefact;
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int showexcluded;
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int selectmode; //0==trig, 1==edge, 2==point, 3==multiedge, 4==line cluster
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int edgeselectmode;
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int useexternaledges;
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int showfaces;
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int showedgecornerpoints;
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int showtouchedtrigchart;
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int conecheck;
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int spiralcheck;
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int selecttrig;
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int nodeofseltrig;
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int selectwithmouse;
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int showmarkedtrigs;
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double dirtytrigfact;
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double smoothangle;
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double smoothnormalsweight;
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int showvicinity;
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int vicinity;
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///
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STLDoctorParams();
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///
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void Print (ostream & ost) const;
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};
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DLL_HEADER extern STLDoctorParams stldoctor;
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// TODO change enable flag to optional parameters
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class DLL_HEADER STLParameters
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{
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public:
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/// angle for edge detection
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double yangle = 30.;
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double contyangle = 20.; //edges continued with contyangle
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/// angle of geometry edge at which the mesher should set a point
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double edgecornerangle = 60.;
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/// angle inside on chart
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double chartangle = 15.;
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/// angle for overlapping parts of char
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double outerchartangle = 70.;
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/// 0 .. no, 1 .. local, (2 .. global)
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int usesearchtree = 0;
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///
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double resthatlasfac = 2.;
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bool resthatlasenable = true;
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double atlasminh = 0.1;
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double resthsurfcurvfac = 2.;
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bool resthsurfcurvenable = false;
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double resthchartdistfac = 1.2;
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bool resthchartdistenable = true;
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double resthcloseedgefac = 1.;
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bool resthcloseedgeenable = true;
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double resthedgeanglefac = 1.;
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bool resthedgeangleenable = false;
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double resthsurfmeshcurvfac = 1.;
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bool resthsurfmeshcurvenable = false;
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double resthlinelengthfac = 0.5;
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bool resthlinelengthenable = true;
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///
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bool recalc_h_opt = true;
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///
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STLParameters();
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///
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void Print (ostream & ost) const;
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};
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void STLMeshing (STLGeometry & geom,
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Mesh & mesh,
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const MeshingParameters& mparam,
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const STLParameters& stlpar);
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int STLSurfaceMeshing (STLGeometry & geom,
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Mesh & mesh,
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const MeshingParameters& mparam,
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const STLParameters& stlpar);
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void STLSurfaceOptimization (STLGeometry & geom,
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Mesh & mesh,
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const MeshingParameters & mparam);
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} // namespace netgen
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#endif
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