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104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
#ifndef FIELDLINES_HPP_INCLUDED
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#define FIELDLINES_HPP_INCLUDED
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namespace netgen
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{
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class RKStepper
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{
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private:
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Array<double> c,b;
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TABLE<double> *a;
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int steps;
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int order;
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double tolerance;
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Array<Vec<3>> K;
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int stepcount;
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double h;
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double startt;
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double startt_bak;
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Point<3> startval;
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Point<3> startval_bak;
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bool adaptive;
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int adrun;
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Point<3> valh;
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int notrestarted;
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public:
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DLL_HEADER ~RKStepper();
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RKStepper(int type = 0);
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void SetTolerance(const double tol){tolerance = tol;}
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void StartNextValCalc(const Point<3> & astartval, const double astartt, const double ah, const bool aadaptive = false);
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bool GetNextData(Point<3> & val, double & t, double & ah);
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bool FeedNextF(const Vec<3> & f);
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};
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class FieldLineCalc
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{
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private:
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const Mesh & mesh;
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typedef std::function<bool (int elnr, const double *, Vec<3> &)> VectorFunction;
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const VectorFunction & func;
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RKStepper stepper;
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Array<double> values;
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Array<Point<3>> pstart, pend;
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double maxlength;
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int maxpoints;
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int direction;
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Point3d pmin, pmax;
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double rad;
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double critical_value;
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bool randomized;
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double thickness;
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public:
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DLL_HEADER FieldLineCalc(const Mesh & amesh, const VectorFunction & afunc,
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const double rel_length, const int amaxpoints = -1,
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const double rel_thickness = -1, const double rel_tolerance = -1, const int rk_type = 0, const int adirection = 0);
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DLL_HEADER ~FieldLineCalc();
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void SetCriticalValue(const double val) { critical_value = val; }
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void Randomized(void) { randomized = true; }
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void NotRandomized(void) { randomized = false; }
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DLL_HEADER void Calc(const Point<3> & startpoint, Array<Point<3>> & points, Array<double> & vals, Array<bool> & drawelems, Array<int> & dirstart);
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DLL_HEADER void GenerateFieldLines(Array<Point<3>> & potential_startpoints, const int numlines);
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const auto & GetPStart() const { return pstart; }
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const auto & GetPEnd() const { return pend; }
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const auto & GetValues() const { return values; }
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const auto GetThickness() const { return thickness; }
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};
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} // namespace netgen
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#endif // VSFIELDLINES_HPP_INCLUDED
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