Talk:Bounding interval hierarchy

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Flat tree structure

Re-added the flat tree structure property. Although BIH is a binary tree, they have a flatter tree structure than KD-trees. This is also mentioned by the author. It is for the same reason as with BVH: Simply primitives are never split by the splitting planes. (Also a threshold can be set to stop subdividing the BIH, resulting in even flatter trees.) I feel the flatter tree is relevant because it leads to smaller memory requirements & bandwidth (due decrease in nodes) and decreased branching. The author also mentions that this could benefit hardware implementations. (I assume this is because it would be easier to write a stackless implementation and also again due to decreased branching). If you feel this shouldn't be in please explain here ;). Errantkid 21:06, 24 October 2006 (UTC)[reply]

General Notes

Shortened the description of non-axis aligned BIH. I feel it's a bit wordy for an overview. I think a description of numerical stability is important enough to warrant its own paragraph. I'll try to write one some time soon if I get some time (or someone else can if they want :P) Errantkid 20:04, 24 October 2006 (UTC)[reply]