Some years back (probably 2 or 3) Marshall very kindly sent me a notebook of polytope commands. In that notebook there were the following:
poly = polytopes.twenty_four_cell() poly.show()
poly.show(projection_direction=[2,5,11,17])
These last two commands produced different green diagrams... two years ago. Today, they produce identical blue diagrams.
I search "sage projection_direction" and http://www.sagemath.org/doc/reference/geometry/sage/geometry/polyhedron/plot.html seems to indicate that the projection_direction option is still valid (not deprecated? should work? what's the correct phrasing here?).
Anyone know what's up with that?
