Does this mean that the children of a node are overlapping? What if they are not overlapping?
ecohen2
On this same page, why can the bounding boxes overlap? Is the rule that a triangle has to be entirely in a box to be considered a part of that box?
sc2019
You can have overlapping or non-overlapping. When they are overlapping, I don't think matters whether the triangle is entirely inside the box or not because you test all the primitives anyways, and only save the closest one. Obviously, if you have a triangle in multiple bounding boxes, you may end up double-testing a primitive, but if you order the bounding boxes that won't happen.
hteo
In general do bounding box hierarchies perform better/worse than bounding sphere hierarchies?
isalinas
@hteo Kayvon addresses this question around the 50:50 mark in the video lecture. "In general, an axis aligned bounding box is often what we use these days because the cheapness of the test is worth the inability to fit geometry really tightly."
Does this mean that the children of a node are overlapping? What if they are not overlapping?
On this same page, why can the bounding boxes overlap? Is the rule that a triangle has to be entirely in a box to be considered a part of that box?
You can have overlapping or non-overlapping. When they are overlapping, I don't think matters whether the triangle is entirely inside the box or not because you test all the primitives anyways, and only save the closest one. Obviously, if you have a triangle in multiple bounding boxes, you may end up double-testing a primitive, but if you order the bounding boxes that won't happen.
In general do bounding box hierarchies perform better/worse than bounding sphere hierarchies?
@hteo Kayvon addresses this question around the 50:50 mark in the video lecture. "In general, an axis aligned bounding box is often what we use these days because the cheapness of the test is worth the inability to fit geometry really tightly."