* @param x2 second finger x location.
* @param y2 second finger y location.
*
- * @return angle of the line between (x1,y1), (x2,y2) in Radians.
+ * @return angle of the line between (x1,y1), (x2,y2) in Deg.
+ * Angles now are given in DEG, not RAD.
+ * ZERO angle at 12-oclock, growing clockwise.
*
* @ingroup Elm_Gesture_Layer
*/