03/28/2002
15-462 Graphics I
16
Other Spatial Subdivision Techniques
•Relax rules for quadtrees and octrees
•k-dimensional tree (k-d tree)
–Split at arbitrary interior point
–Split one dimension at a time
•Binary space partitioning tree (BSP tree)
–In 2 dimensions, split with any line
–In k dims. split with k-1 dimensional hyperplane
–Particularly useful for painter’s algorithm
–Can also be used for ray tracing [see handout]