agg/inc/agg_vcgen_smooth_poly1.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.3
   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_SMOOTH_POLY1_INCLUDED
  17 #define AGG_VCGEN_SMOOTH_POLY1_INCLUDED
  18
  19 #include "agg_basics.h"
  20 #include "agg_vertex_sequence.h"
  21
  22
  23 namespace agg
  24 {
  25
  26     //======================================================vcgen_smooth_poly1
  27     //
  28     // See Implementation agg_vcgen_smooth_poly1.cpp
  29     // Smooth polygon generator
  30     //
  31     //------------------------------------------------------------------------
  32     class vcgen_smooth_poly1
  33     {
  34         enum status_e
  35         {
  36             initial,
  37             ready,
  38             polygon,
  39             ctrl_b,
  40             ctrl_e,
  41             ctrl1,
  42             ctrl2,
  43             end_poly,
  44             stop
  45         };
  46
  47     public:
  48         typedef vertex_sequence<vertex_dist, 6> vertex_storage;
  49
  50         vcgen_smooth_poly1();
  51
  52         void   smooth_value(double v) { m_smooth_value = v * 0.5; }
  53         double smooth_value() const { return m_smooth_value * 2.0; }
  54
  55         // Vertex Generator Interface
  56         void remove_all();
  57         void add_vertex(double x, double y, unsigned cmd);
  58
  59         // Vertex Source Interface
  60         void     rewind(unsigned id);
  61         unsigned vertex(double* x, double* y);
  62
  63     private:
  64         vcgen_smooth_poly1(const vcgen_smooth_poly1&);
  65         const vcgen_smooth_poly1& operator = (const vcgen_smooth_poly1&);
  66
  67         void calculate(const vertex_dist& v0,
  68                        const vertex_dist& v1,
  69                        const vertex_dist& v2,
  70                        const vertex_dist& v3);
  71
  72         vertex_storage m_src_vertices;
  73         double         m_smooth_value;
  74         unsigned       m_closed;
  75         status_e       m_status;
  76         unsigned       m_src_vertex;
  77         double         m_ctrl1_x;
  78         double         m_ctrl1_y;
  79         double         m_ctrl2_x;
  80         double         m_ctrl2_y;
  81     };
  82
  83 }
  84
  85
  86 #endif
  87