eqpotgraph.hpp
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1 
5 /* Copyright (c) 2005-2011 Taneli Kalvas. All rights reserved.
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42 
43 #ifndef EQPOTGRAPH_HPP
44 #define EQPOTGRAPH_HPP 1
45 
46 
47 #include <vector>
48 #include "geometry.hpp"
49 #include "scalarfield.hpp"
50 #include "graph3d.hpp"
51 #include "color.hpp"
52 
53 
58 class EqPotGraph : public Graph3D {
59 
60  struct Line {
61  double x[4]; /* Coordinates of line segment (x1,y1,x2,y2) */
62 
63  Line( double _x1, double _y1, double _x2, double _y2 ) {
64  x[0] = _x1;
65  x[1] = _y1;
66  x[2] = _x2;
67  x[3] = _y2;
68  }
69 
70  double &operator[]( int i ) { return( x[i] ); }
71  const double &operator[]( int i ) const { return( x[i] ); }
72  };
73 
74  struct EqPotLines {
75  double pot; /* Potential value for equipotential line. */
76  std::vector<Line> x; /* Line segment coordinates. */
77 
78  EqPotLines( double pot ) : pot(pot) {}
79  };
80 
81  Color _color;
82  const ScalarField _epot;
83  const Geometry &_g;
84  bool _data_built;
85 
86  std::vector<double> _eqlines_manual;
87  size_t _eqlines_auto;
88  std::vector<EqPotLines *> _lines;
89 
90  view_e _oview;
91  double _olevel;
92 
93  bool _cache;
94 
95 
96  bool eqline_exists( double pot1, signed char sol1,
97  double pot2, signed char sol2,
98  double pot ) const;
99  void build_data( void );
100 
101 public:
102 
108  EqPotGraph( const ScalarField &epot, const Geometry &g );
109 
112  virtual ~EqPotGraph();
113 
118  void disable_cache( void );
119 
123  void set_eqlines_manual( const std::vector<double> &pot );
124 
128  void set_eqlines_auto( size_t N );
129 
139  virtual void plot( cairo_t *cairo, const Coordmapper *cm, const double range[4] );
140 
145  virtual void plot_sample( cairo_t *cairo, double x, double y, double width, double height );
146 
152  virtual void get_bbox( double bbox[4] );
153 };
154 
155 
156 #endif