Fig. 4
Truncation of polyhedra to simulate the missing wedge and its effect on the polyhedral graph (PG): a A cube (Platonic polyhedron originally with V = 8, E = 12, F = 6) truncated by two parallel planes, resulting in V = 6, E = 6, F = 0 (completely observed), F 3 + = F 4 + = 6 (incompletely observed faces). b Effect of varying the orientation of the truncation planes. (i) Original hexagon V = 6, E = 6, V 2 = 6 (ii) V = 4, E = 2, V 2 = 4 (iii) V = 4, E = 2, V 1 = 4 (iv) V = 2, E = 2, V 2 = 2