headers/libs/agg/agg_trans_double_path.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_TRANS_DOUBLE_PATH_INCLUDED
  17 #define AGG_TRANS_DOUBLE_PATH_INCLUDED
  18
  19 #include "agg_basics.h"
  20 #include "agg_vertex_sequence.h"
  21
  22 namespace agg
  23 {
  24
  25     // See also: agg_trans_double_path.cpp
  26     //
  27     //-------------------------------------------------------trans_double_path
  28     class trans_double_path
  29     {
  30         enum status_e
  31         {
  32             initial,
  33             making_path,
  34             ready
  35         };
  36
  37     public:
  38         typedef vertex_sequence<vertex_dist, 6> vertex_storage;
  39
  40         trans_double_path();
  41
  42         //--------------------------------------------------------------------
  43         void   base_length(double v)  { m_base_length = v; }
  44         double base_length() const { return m_base_length; }
  45
  46         //--------------------------------------------------------------------
  47         void   base_height(double v)  { m_base_height = v; }
  48         double base_height() const { return m_base_height; }
  49
  50         //--------------------------------------------------------------------
  51         void preserve_x_scale(bool f) { m_preserve_x_scale = f;    }
  52         bool preserve_x_scale() const { return m_preserve_x_scale; }
  53
  54         //--------------------------------------------------------------------
  55         void reset();
  56         void move_to1(double x, double y);
  57         void line_to1(double x, double y);
  58         void move_to2(double x, double y);
  59         void line_to2(double x, double y);
  60         void finalize_paths();
  61
  62         //--------------------------------------------------------------------
  63         template<class VertexSource1, class VertexSource2>
  64         void add_paths(VertexSource1& vs1, VertexSource2& vs2,
  65                        unsigned path1_id=0, unsigned path2_id=0)
  66         {
  67             double x;
  68             double y;
  69
  70             unsigned cmd;
  71
  72             vs1.rewind(path1_id);
  73             while(!is_stop(cmd = vs1.vertex(&x, &y)))
  74             {
  75                 if(is_move_to(cmd))
  76                 {
  77                     move_to1(x, y);
  78                 }
  79                 else
  80                 {
  81                     if(is_vertex(cmd))
  82                     {
  83                         line_to1(x, y);
  84                     }
  85                 }
  86             }
  87
  88             vs2.rewind(path2_id);
  89             while(!is_stop(cmd = vs2.vertex(&x, &y)))
  90             {
  91                 if(is_move_to(cmd))
  92                 {
  93                     move_to2(x, y);
  94                 }
  95                 else
  96                 {
  97                     if(is_vertex(cmd))
  98                     {
  99                         line_to2(x, y);
 100                     }
 101                 }
 102             }
 103             finalize_paths();
 104         }
 105
 106         //--------------------------------------------------------------------
 107         double total_length1() const;
 108         double total_length2() const;
 109         void transform(double *x, double *y) const;
 110
 111     private:
 112         double finalize_path(vertex_storage& vertices);
 113         void transform1(const vertex_storage& vertices,
 114                         double kindex, double kx,
 115                         double *x, double* y) const;
 116
 117         vertex_storage m_src_vertices1;
 118         vertex_storage m_src_vertices2;
 119         double         m_base_length;
 120         double         m_base_height;
 121         double         m_kindex1;
 122         double         m_kindex2;
 123         status_e       m_status1;
 124         status_e       m_status2;
 125         bool           m_preserve_x_scale;
 126     };
 127
 128 }
 129
 130
 131 #endif