the vector doesn't change.

No matter which way you face,or what coordinate system you place over the camp ground,the vector doesn't change.Let's use the familiar Cartesian coordinate system with its x and y axes.We call these two directions our coordinate basis because they're used to describe everything we graph.Let's say the tent starts at the origin and ends up over here at point B.The straight arrow connecting the two points is the vector from the origin to B.