-//=======================================================================
-// Function: GLViewer_CoordSystem
-// Purpose :
-//=======================================================================
+/*!
+ Constructor
+ \param aType - type of CS
+ \param X0 - X of origin in reference CS
+ \param Y0 - Y of origin in reference CS
+ \param XUnit - X unit in reference CS
+ \param YUnit - Y unit in reference CS
+ \param Rotation - rotation relative reference CS
+*/