The cross-section of a spherical object, for example, will be circular. More complex shape would, however, generate various curvature depending on the type of cross-section (eg. horizontal, vertical). Because of the variation possible in taking cross-section, the orientation of the object is critical.
The shape does not depend on changes in orientation/direction. However, a mirror image could be called a different shape. Shape may change if the object is scaled differentially. For example, a sphere becomes an ellipsoid when scaled differently in the vertical and horizontal axis. In other words, preserving axis of symmetry is important for preserving shapes.