@@ -0,0 +1,378 @@
+package org.psjava.formula.geometry;%0A%0Aimport org.psjava.ds.geometry.Point2D;%0Aimport org.psjava.ds.numbersystrem.MultipliableNumberSystem;%0A%0Apublic class RightTurn %7B%0A%0A%09public static %3CT%3E boolean is(Point2D%3CT%3E p1, Point2D%3CT%3E p2, Point2D%3CT%3E p3, MultipliableNumberSystem%3CT%3E ns) %7B%0A%09%09T ccw = CCW.ccw(ns, p1, p2, p3);%0A%09%09return RightTurnFromCCW.is(ns, ccw);%0A%09%7D%0A%0A%09private RightTurn() %7B%7D%0A%7D%0A

add RightTurn checker