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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.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
//----------------------------------------------------------------------------
//
// classes curve3 and curve4
//
//----------------------------------------------------------------------------
#ifndef AGG_CURVES_INCLUDED
#define AGG_CURVES_INCLUDED
#include "agg_basics.h"
#include "agg_vertex_iterator.h"
namespace agg
{
// See Implemantation agg_curves.cpp
//------------------------------------------------------------------curve3
class curve3
{
public:
curve3() :
m_num_steps(0), m_step(0), m_scale(1.0) { }
curve3(double x1, double y1,
double x2, double y2,
double x3, double y3) :
m_num_steps(0), m_step(0), m_scale(1.0)
{
init(x1, y1, x2, y2, x3, y3);
}
void reset() { m_num_steps = 0; m_step = -1; }
void init(double x1, double y1,
double x2, double y2,
double x3, double y3);
void approximation_scale(double s) { m_scale = s; }
double approximation_scale() const { return m_scale; }
void rewind(unsigned id);
unsigned vertex(double* x, double* y);
typedef curve3 source_type;
typedef vertex_iterator<source_type> iterator;
iterator begin(unsigned id) { return iterator(*this, id); }
iterator end() { return iterator(path_cmd_stop); }
private:
int m_num_steps;
int m_step;
double m_scale;
double m_start_x;
double m_start_y;
double m_end_x;
double m_end_y;
double m_fx;
double m_fy;
double m_dfx;
double m_dfy;
double m_ddfx;
double m_ddfy;
double m_saved_fx;
double m_saved_fy;
double m_saved_dfx;
double m_saved_dfy;
};
//-----------------------------------------------------------------curve4
class curve4
{
public:
curve4() :
m_num_steps(0), m_step(0), m_scale(1.0) { }
curve4(double x1, double y1,
double x2, double y2,
double x3, double y3,
double x4, double y4) :
m_num_steps(0), m_step(0), m_scale(1.0)
{
init(x1, y1, x2, y2, x3, y3, x4, y4);
}
void reset() { m_num_steps = 0; m_step = -1; }
void init(double x1, double y1,
double x2, double y2,
double x3, double y3,
double x4, double y4);
void approximation_scale(double s) { m_scale = s; }
double approximation_scale() const { return m_scale; }
void rewind(unsigned id);
unsigned vertex(double* x, double* y);
typedef curve4 source_type;
typedef vertex_iterator<source_type> iterator;
iterator begin(unsigned id) { return iterator(*this, id); }
iterator end() { return iterator(path_cmd_stop); }
private:
int m_num_steps;
int m_step;
double m_scale;
double m_start_x;
double m_start_y;
double m_end_x;
double m_end_y;
double m_fx;
double m_fy;
double m_dfx;
double m_dfy;
double m_ddfx;
double m_ddfy;
double m_dddfx;
double m_dddfy;
double m_saved_fx;
double m_saved_fy;
double m_saved_dfx;
double m_saved_dfy;
double m_saved_ddfx;
double m_saved_ddfy;
};
}
#endif
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