Compute the half vector between this and the vector <code>(x, y, z)</code>.
@param x the x component of the other vector @param y the y component of the other vector @param z the z component of the other vector @return this
See Implementation
Compute the half vector between this and the vector <code>(x, y, z)</code>.
@param x the x component of the other vector @param y the y component of the other vector @param z the z component of the other vector @return this