What if you processed next before the children?
What if you did the move after you did the superclass drawing?
What would the scene look like?
Different kinds of tree traversals…
Think about trees
Branches represent structure
HBranch, VBranch, and MoveBranch represent structure and behavior
Think about objects
They know things, and they know how to do things.
They represent structure and behavior.
Sophisticated programs represent both.
The line between data and programs is very thin…