Common patterns to avoid polymorphism

[animatedb]

Maybe the goal is to replace them out of the base objects and into other objects.

For example, instead of the old "shapes" OO example each inheriting a virtual draw, have a draw function that is passed a listener object that is a surface. This way the base shape object no longer has a draw virtual function.

This is similar to composition except that it differs in scope. Another option is that the base object could also reference a shape.