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 //---------------------------------------------------------------------------- // Anti-Grain Geometry - Version 2.3 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) // Copyright (C) 2005 Tony Juricic (tonygeek@yahoo.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 //---------------------------------------------------------------------------- #ifndef AGG_CURVES_INCLUDED #define AGG_CURVES_INCLUDED #include "agg_array.h" namespace agg { struct curve4_points { float cp[8]; curve4_points() {} curve4_points(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) { cp[0] = x1; cp[1] = y1; cp[2] = x2; cp[3] = y2; cp[4] = x3; cp[5] = y3; cp[6] = x4; cp[7] = y4; } void init(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) { cp[0] = x1; cp[1] = y1; cp[2] = x2; cp[3] = y2; cp[4] = x3; cp[5] = y3; cp[6] = x4; cp[7] = y4; } float operator [] (unsigned i) const { return cp[i]; } float& operator [] (unsigned i) { return cp[i]; } }; class curve4_div { public: curve4_div() : m_count(0) {} curve4_div(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) : m_count(0) { init(x1, y1, x2, y2, x3, y3, x4, y4); } curve4_div(const curve4_points& cp) : m_count(0) { init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]); } void reset() { m_points.remove_all(); m_count = 0; } void init(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4); void init(const curve4_points& cp) { init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]); } void rewind(unsigned) { m_count = 0; } unsigned vertex(float* x, float* y) { if(m_count >= m_points.size()) { return path_cmd_stop; } const point_type& p = m_points[m_count++]; *x = p.x; *y = p.y; return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to; } unsigned vertex_flag(float* x, float* y, int& flag) { if(m_count >= m_points.size()) { return path_cmd_stop; } const point_type& p = m_points[m_count++]; *x = p.x; *y = p.y; flag = p.flag; return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to; } int count() { return m_points.size(); } private: void bezier(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4); void recursive_bezier(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4, unsigned level); float m_distance_tolerance_square; float m_distance_tolerance_manhattan; unsigned m_count; pod_deque m_points; }; class curve4 { public: curve4() {} curve4(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) { init(x1, y1, x2, y2, x3, y3, x4, y4); } curve4(const curve4_points& cp) { init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]); } void reset() { m_curve_div.reset(); } void init(float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4) { m_curve_div.init(x1, y1, x2, y2, x3, y3, x4, y4); } void init(const curve4_points& cp) { init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]); } void rewind(unsigned path_id) { m_curve_div.rewind(path_id); } unsigned vertex(float* x, float* y) { return m_curve_div.vertex(x, y); } unsigned vertex_curve_flag(float* x, float* y, int& flag) { return m_curve_div.vertex_flag(x, y, flag); } int count() { return m_curve_div.count(); } private: curve4_div m_curve_div; }; } #endif