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79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry (AGG) - Version 2.5
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// A high quality rendering engine for C++
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// Copyright (C) 2002-2006 Maxim Shemanarev
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://antigrain.com
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//
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// AGG is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// AGG is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with AGG; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301, USA.
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//----------------------------------------------------------------------------
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#ifndef AGG_ARC_INCLUDED
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#define AGG_ARC_INCLUDED
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#include <math.h>
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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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