2011-10-12 05:02:50 +02:00
|
|
|
//----------------------------------------------------------------------------
|
|
|
|
|
// Anti-Grain Geometry - Version 2.4
|
|
|
|
|
// 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
|
|
|
|
|
//----------------------------------------------------------------------------
|
|
|
|
|
//
|
|
|
|
|
// Arc vertex generator
|
|
|
|
|
//
|
|
|
|
|
//----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
#ifndef AGG_ARC_INCLUDED
|
|
|
|
|
#define AGG_ARC_INCLUDED
|
|
|
|
|
|
2013-02-28 20:41:08 +01:00
|
|
|
#include <cmath>
|
2011-10-12 05:02:50 +02:00
|
|
|
#include "agg_basics.h"
|
|
|
|
|
|
|
|
|
|
namespace agg
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
//=====================================================================arc
|
|
|
|
|
//
|
|
|
|
|
// See Implementation agg_arc.cpp
|
|
|
|
|
//
|
|
|
|
|
class arc
|
|
|
|
|
{
|
|
|
|
|
public:
|
|
|
|
|
arc() : m_scale(1.0), m_initialized(false) {}
|
|
|
|
|
arc(double x, double y,
|
|
|
|
|
double rx, double ry,
|
|
|
|
|
double a1, double a2,
|
|
|
|
|
bool ccw=true);
|
|
|
|
|
|
|
|
|
|
void init(double x, double y,
|
|
|
|
|
double rx, double ry,
|
|
|
|
|
double a1, double a2,
|
|
|
|
|
bool ccw=true);
|
|
|
|
|
|
|
|
|
|
void approximation_scale(double s);
|
|
|
|
|
double approximation_scale() const { return m_scale; }
|
|
|
|
|
|
|
|
|
|
void rewind(unsigned);
|
|
|
|
|
unsigned vertex(double* x, double* y);
|
|
|
|
|
|
|
|
|
|
private:
|
|
|
|
|
void normalize(double a1, double a2, bool ccw);
|
|
|
|
|
|
|
|
|
|
double m_x;
|
|
|
|
|
double m_y;
|
|
|
|
|
double m_rx;
|
|
|
|
|
double m_ry;
|
|
|
|
|
double m_angle;
|
|
|
|
|
double m_start;
|
|
|
|
|
double m_end;
|
|
|
|
|
double m_scale;
|
|
|
|
|
double m_da;
|
|
|
|
|
bool m_ccw;
|
|
|
|
|
bool m_initialized;
|
|
|
|
|
unsigned m_path_cmd;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|
