37             mfY = 0.0;  in normalize()
50                     mfY /= fLen;  in normalize()
61         mfY = rVec.getY();  in operator =()
69             return fabs(mfY);  in getLength()
71         else if(fTools::equalZero(mfY))  in getLength()
76         return hypot( mfX, mfY );  in getLength()
81         return((mfX * rVec.mfX) + (mfY * rVec.mfY));  in scalar()
86         return(mfX * rVec.getY() - mfY * rVec.getX());  in cross()
91         return atan2(mfX * rVec.getY() - mfY * rVec.getX(),  in angle()
92             mfX * rVec.getX() + mfY * rVec.getY());  in angle()
103                             rMat.get(0,1)*mfY );  in operator *=()
105                             rMat.get(1,1)*mfY );  in operator *=()
107         mfY = fTempY;  in operator *=()
126             mfY *= fLen;  in setLength()