Warning: session_start(): open(/var/lib/php/sessions/sess_bbkn3k0mvgu0lea5n8dsr70629, O_RDWR) failed: No space left on device (28) in /var/www/tb-usercake/models/config.php on line 51

Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
// angle between p1 and p2 with respect to center point // result is between 0 and pi()*2 static double threePointAngle(IDoublePt p1, IDoublePt center, IDoublePt p2) { double angle = atan2( p1.x_double()-center.x_double(), p1.y_double()-center.y_double()) -atan2( p2.x_double()-center.x_double(), p2.y_double()-center.y_double()); ret angle < 0 ? angle+pi()*2 : angle; }