/**
Adds the specified transform to this vector. This vector
is first rotated, then translated.
*/
void Vect2D::add(Transform2D& xform) {
// rotate
addRotation(xform);
// translate
*this += xform.getLocation();
}
/**
Subtracts the specified transform to this vector. This
vector translated, then rotated.
*/
void Vect2D::subtract(Transform2D& xform) {
// translate
*this -= xform.getLocation();
// rotate
subtractRotation(xform);
}