| //---------------------------------------------------------------------------- | |
| // 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 | |
| // | |
| //---------------------------------------------------------------------------- | |
| 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; | |
| }; | |
| } | |