Figure 3.

Trajectory along the first PC space basis vector: a)$\mu -3\sqrt{{\lambda }_1}{\upsilon }_1$ shape; b)$\mu -1.5\sqrt{{\lambda }_1}{\upsilon }_1$; c)µ shape; d)$\mu +1.5\sqrt{{\lambda }_1}{\upsilon }_1$ shape; e) $\mu +3\sqrt{{\lambda }_1}{\upsilon }_1$ shape. The top row is the front view and the bottom is the rear view.