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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
// Copyright (C) 2005 Tony Juricic (tonygeek@yahoo.com)
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://www.antigrain.com
//----------------------------------------------------------------------------
#ifndef AGG_CURVES_INCLUDED
#define AGG_CURVES_INCLUDED
#include "agg_array.h"
namespace agg
{
struct curve4_points {
float cp[8];
curve4_points() {}
curve4_points(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4)
{
cp[0] = x1;
cp[1] = y1;
cp[2] = x2;
cp[3] = y2;
cp[4] = x3;
cp[5] = y3;
cp[6] = x4;
cp[7] = y4;
}
void init(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4)
{
cp[0] = x1;
cp[1] = y1;
cp[2] = x2;
cp[3] = y2;
cp[4] = x3;
cp[5] = y3;
cp[6] = x4;
cp[7] = y4;
}
float operator [] (unsigned i) const
{
return cp[i];
}
float& operator [] (unsigned i)
{
return cp[i];
}
};
class curve4_div
{
public:
curve4_div() :
m_count(0)
{}
curve4_div(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4) :
m_count(0)
{
init(x1, y1, x2, y2, x3, y3, x4, y4);
}
curve4_div(const curve4_points& cp) :
m_count(0)
{
init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
}
void reset()
{
m_points.remove_all();
m_count = 0;
}
void init(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4);
void init(const curve4_points& cp)
{
init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
}
void rewind(unsigned)
{
m_count = 0;
}
unsigned vertex(float* x, float* y)
{
if(m_count >= m_points.size()) {
return path_cmd_stop;
}
const point_type& p = m_points[m_count++];
*x = p.x;
*y = p.y;
return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to;
}
unsigned vertex_flag(float* x, float* y, int& flag)
{
if(m_count >= m_points.size()) {
return path_cmd_stop;
}
const point_type& p = m_points[m_count++];
*x = p.x;
*y = p.y;
flag = p.flag;
return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to;
}
int count()
{
return m_points.size();
}
private:
void bezier(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4);
void recursive_bezier(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4,
unsigned level);
float m_distance_tolerance_square;
float m_distance_tolerance_manhattan;
unsigned m_count;
pod_deque<point_type> m_points;
};
class curve4
{
public:
curve4() {}
curve4(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4)
{
init(x1, y1, x2, y2, x3, y3, x4, y4);
}
curve4(const curve4_points& cp)
{
init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
}
void reset()
{
m_curve_div.reset();
}
void init(float x1, float y1,
float x2, float y2,
float x3, float y3,
float x4, float y4)
{
m_curve_div.init(x1, y1, x2, y2, x3, y3, x4, y4);
}
void init(const curve4_points& cp)
{
init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
}
void rewind(unsigned path_id)
{
m_curve_div.rewind(path_id);
}
unsigned vertex(float* x, float* y)
{
return m_curve_div.vertex(x, y);
}
unsigned vertex_curve_flag(float* x, float* y, int& flag)
{
return m_curve_div.vertex_flag(x, y, flag);
}
int count()
{
return m_curve_div.count();
}
private:
curve4_div m_curve_div;
};
}
#endif