agg/src/agg_curves.cpp

45                           double x2, double y2,
54         double dy1 = y2 - y1;
56         double dy2 = y3 - y2;
71         double tmpy = (y1 - y2 * 2.0 + y3) * subdivide_step2;
77         m_saved_dfy = m_dfy = tmpy + (y2 - y1) * (2.0 * subdivide_step);
130                           double x2, double y2,
136         bezier(x1, y1, x2, y2, x3, y3);
142                                       double x2, double y2,
154         double y12   = (y1 + y2) / 2;
156         double y23   = (y2 + y3) / 2;
162         double d = fabs(((x2 - x3) * dy - (y2 - y3) * dx));
182                 da = fabs(atan2(y3 - y2, x3 - x2) - atan2(y2 - y1, x2 - x1));
201                 d = calc_sq_distance(x1, y1, x2, y2);
205                 d = ((x2 - x1)*dx + (y2 - y1)*dy) / da;
212                      if(d <= 0) d = calc_sq_distance(x2, y2, x1, y1);
213                 else if(d >= 1) d = calc_sq_distance(x2, y2, x3, y3);
214                 else            d = calc_sq_distance(x2, y2, x1 + d*dx, y1 + d*dy);
218                 m_points.add(point_d(x2, y2));
231                             double x2, double y2,
235         recursive_bezier(x1, y1, x2, y2, x3, y3, 0);
260                           double x2, double y2,
270         double dy1 = y2 - y1;
272         double dy2 = y3 - y2;
301         double tmp1y = y1 - y2 * 2.0 + y3;
304         double tmp2y = (y2 - y3) * 3.0 - y1 + y4;
310         m_saved_dfy = m_dfy = (y2 - y1) * pre1 + tmp1y * pre2 + tmp2y * subdivide_step3;
376                           double x2, double y2,
383         bezier(x1, y1, x2, y2, x3, y3, x4, y4);
389                                       double x2, double y2,
402         double y12   = (y1 + y2) / 2;
404         double y23   = (y2 + y3) / 2;
420         double d2 = fabs(((x2 - x4) * dy - (y2 - y4) * dx));
433                 d2 = calc_sq_distance(x1, y1, x2, y2);
440                 da2 = y2 - y1;
451                      if(d2 <= 0) d2 = calc_sq_distance(x2, y2, x1, y1);
452                 else if(d2 >= 1) d2 = calc_sq_distance(x2, y2, x4, y4);
453                 else             d2 = calc_sq_distance(x2, y2, x1 + d2*dx, y1 + d2*dy);
463                     m_points.add(point_d(x2, y2));
490                 da1 = fabs(atan2(y4 - y3, x4 - x3) - atan2(y3 - y2, x3 - x2));
495                     m_points.add(point_d(x2, y2));
524                 da1 = fabs(atan2(y3 - y2, x3 - x2) - atan2(y2 - y1, x2 - x1));
529                     m_points.add(point_d(x2, y2));
538                         m_points.add(point_d(x2, y2));
561                 k   = atan2(y3 - y2, x3 - x2);
562                 da1 = fabs(k - atan2(y2 - y1, x2 - x1));
579                         m_points.add(point_d(x2, y2));
601                             double x2, double y2,
606         recursive_bezier(x1, y1, x2, y2, x3, y3, x4, y4, 0);