2011-10-12 03:02:50 +00:00
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// Arc vertex generator
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_ARC_INCLUDED
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#define AGG_ARC_INCLUDED
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2013-02-28 19:41:08 +00:00
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#include <cmath>
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2011-10-12 03:02:50 +00:00
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#include "agg_basics.h"
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namespace agg
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{
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//=====================================================================arc
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//
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// See Implementation agg_arc.cpp
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//
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class arc
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{
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public:
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arc() : m_scale(1.0), m_initialized(false) {}
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arc(double x, double y,
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double rx, double ry,
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double a1, double a2,
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bool ccw=true);
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void init(double x, double y,
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double rx, double ry,
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double a1, double a2,
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bool ccw=true);
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void approximation_scale(double s);
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double approximation_scale() const { return m_scale; }
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void rewind(unsigned);
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unsigned vertex(double* x, double* y);
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private:
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void normalize(double a1, double a2, bool ccw);
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double m_x;
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double m_y;
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double m_rx;
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double m_ry;
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double m_angle;
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double m_start;
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double m_end;
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double m_scale;
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double m_da;
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bool m_ccw;
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bool m_initialized;
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unsigned m_path_cmd;
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};
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}
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#endif
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