36             mfX = 0.0;  in normalize()
49                     mfX /= fLen;  in normalize()
60         mfX = rVec.getX();  in operator =()
67         if(fTools::equalZero(mfX))  in getLength()
73             return fabs(mfX);  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()
102         const double fTempX( rMat.get(0,0)*mfX +  in operator *=()
104         const double fTempY( rMat.get(1,0)*mfX +  in operator *=()
106         mfX = fTempX;  in operator *=()
125             mfX *= fLen;  in setLength()