20 #include "agg_vcgen_smooth_poly1.h" 26 vcgen_smooth_poly1::vcgen_smooth_poly1() :
37 void vcgen_smooth_poly1::remove_all()
39 m_src_vertices.remove_all();
46 void vcgen_smooth_poly1::add_vertex(
double x,
double y,
unsigned cmd)
51 m_src_vertices.modify_last(vertex_dist(x, y));
57 m_src_vertices.add(vertex_dist(x, y));
61 m_closed = get_close_flag(cmd);
68 void vcgen_smooth_poly1::rewind(
unsigned)
70 if(m_status == initial)
72 m_src_vertices.close(m_closed != 0);
80 void vcgen_smooth_poly1::calculate(
const vertex_dist& v0,
81 const vertex_dist& v1,
82 const vertex_dist& v2,
83 const vertex_dist& v3)
86 double k1 = v0.dist / (v0.dist + v1.dist);
87 double k2 = v1.dist / (v1.dist + v2.dist);
89 double xm1 = v0.x + (v2.x - v0.x) * k1;
90 double ym1 = v0.y + (v2.y - v0.y) * k1;
91 double xm2 = v1.x + (v3.x - v1.x) * k2;
92 double ym2 = v1.y + (v3.y - v1.y) * k2;
94 m_ctrl1_x = v1.x + m_smooth_value * (v2.x - xm1);
95 m_ctrl1_y = v1.y + m_smooth_value * (v2.y - ym1);
96 m_ctrl2_x = v2.x + m_smooth_value * (v1.x - xm2);
97 m_ctrl2_y = v2.y + m_smooth_value * (v1.y - ym2);
102 unsigned vcgen_smooth_poly1::vertex(
double* x,
double* y)
104 unsigned cmd = path_cmd_line_to;
113 if(m_src_vertices.size() < 2)
119 if(m_src_vertices.size() == 2)
121 *x = m_src_vertices[m_src_vertex].x;
122 *y = m_src_vertices[m_src_vertex].y;
124 if(m_src_vertex == 1)
return path_cmd_move_to;
125 if(m_src_vertex == 2)
return path_cmd_line_to;
130 cmd = path_cmd_move_to;
137 if(m_src_vertex >= m_src_vertices.size())
139 *x = m_src_vertices[0].x;
140 *y = m_src_vertices[0].y;
142 return path_cmd_curve4;
147 if(m_src_vertex >= m_src_vertices.size() - 1)
149 *x = m_src_vertices[m_src_vertices.size() - 1].x;
150 *y = m_src_vertices[m_src_vertices.size() - 1].y;
152 return path_cmd_curve3;
156 calculate(m_src_vertices.prev(m_src_vertex),
157 m_src_vertices.curr(m_src_vertex),
158 m_src_vertices.next(m_src_vertex),
159 m_src_vertices.next(m_src_vertex + 1));
161 *x = m_src_vertices[m_src_vertex].x;
162 *y = m_src_vertices[m_src_vertex].y;
168 return ((m_src_vertex == 1) ?
174 if(m_src_vertex == 1)
177 return path_cmd_move_to;
179 if(m_src_vertex >= m_src_vertices.size() - 1)
182 return path_cmd_curve3;
185 return path_cmd_curve4;
193 return path_cmd_curve3;
199 return path_cmd_curve3;
205 return path_cmd_curve4;
211 return path_cmd_curve4;
215 return path_cmd_end_poly | m_closed;
218 return path_cmd_stop;