Three types of objects, corresponding to three algorithm classes, have been identified, polyhedra, solids of revolution and piecewise smooth objects.

Algorithms for aspect graph production follow a basic procedure.

• Decide on the class of object shape (convex polyhedra, concave polyhedra ...)
• Create a catologue or dictionary of ways in which accidental viewpoints occur
• Develop a method to enumerate how these events occur; each visual event is a hyperplane in viewpoint space between general views
• Partition viewpoint space into cells
• Create the aspect graph by traversing the partition of viewpoint space

Polyhedral objects

Solids of revolution

Piecewise smooth objects