= 2 * M_PI) $start_angle -= 2 * M_PI; while ($end_angle >= 2 * M_PI) $end_angle -= 2 * M_PI; $angle_diff = $end_angle - $start_angle; if ($angle_diff < 0) $angle_diff += 2 * M_PI; $large_arc_flag = ($angle_diff > M_PI) ? 1 : 0; $sweep_flag = 1; ?>