Get the length squared of a 2-dimensional double-precision vector.
@param x The vector's x component @param y The vector's y component
@return the length squared of the given vector
@author F. Neurath
See Implementation
Get the length squared of a 2-dimensional double-precision vector.
@param x The vector's x component @param y The vector's y component
@return the length squared of the given vector
@author F. Neurath