headers/libs/agg/agg_vcgen_bspline.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.4
   3 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
   4 //
   5 // Permission to copy, use, modify, sell and distribute this software
   6 // is granted provided this copyright notice appears in all copies.
   7 // This software is provided "as is" without express or implied
   8 // warranty, and with no claim as to its suitability for any purpose.
   9 //
  10 //----------------------------------------------------------------------------
  11 // Contact: mcseem@antigrain.com
  12 //          mcseemagg@yahoo.com
  13 //          http://www.antigrain.com
  14 //----------------------------------------------------------------------------
  15
  16 #ifndef AGG_VCGEN_BSPLINE_INCLUDED
  17 #define AGG_VCGEN_BSPLINE_INCLUDED
  18
  19 #include "agg_basics.h"
  20 #include "agg_array.h"
  21 #include "agg_bspline.h"
  22
  23
  24 namespace agg
  25 {
  26
  27     //==========================================================vcgen_bspline
  28     class vcgen_bspline
  29     {
  30         enum status_e
  31         {
  32             initial,
  33             ready,
  34             polygon,
  35             end_poly,
  36             stop
  37         };
  38
  39     public:
  40         typedef pod_bvector<point_d, 6> vertex_storage;
  41
  42         vcgen_bspline();
  43
  44         void interpolation_step(double v) { m_interpolation_step = v; }
  45         double interpolation_step() const { return m_interpolation_step; }
  46
  47         // Vertex Generator Interface
  48         void remove_all();
  49         void add_vertex(double x, double y, unsigned cmd);
  50
  51         // Vertex Source Interface
  52         void     rewind(unsigned path_id);
  53         unsigned vertex(double* x, double* y);
  54
  55     private:
  56         vcgen_bspline(const vcgen_bspline&);
  57         const vcgen_bspline& operator = (const vcgen_bspline&);
  58
  59         vertex_storage m_src_vertices;
  60         bspline        m_spline_x;
  61         bspline        m_spline_y;
  62         double         m_interpolation_step;
  63         unsigned       m_closed;
  64         status_e       m_status;
  65         unsigned       m_src_vertex;
  66         double         m_cur_abscissa;
  67         double         m_max_abscissa;
  68     };
  69
  70 }
  71
  72
  73 #endif
  74