Using real data (originally collected via Yahoo! Music APIs) showing related musical acts, a large tree is grown showing the relationship of each act to the Beatles (the first node). Nodes are colored by musical genre.
This was principally an exercise in coming up with a good algorithm for rendering large trees.
Nodes are connected using spring physics (Hooke's law), and repel from their neighbors.
A relaxation and avoidance algorithm is used to help each node find optimal placement. Every few hundred nodes, there is a pause, so the tree can relax and find its natural shape.
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