Re: [Algorithms] octree and HSR

[Dave E. <eb...@ma...>]

From: "A. Jeffrey Cahyono" <Alb...@te...>

> > 4. How can I check if the view frustrum and a cube intersect? (or if the
cube is inside
> the view frustrum)
> This is easy once you've created the view frustum.
> Just test the eight corners of the cube against the six frustum plane like
this.
<snip of code>

I do not believe your code handles the case when the eight
corners of the box are outside the frustum, but the box
still intersects the frustum (or completely contains the frustum).
If you can guarantee that your bounding boxes are small
enough relative to the frustum (for example a rectangular
face can never be large enough to contain the near face
of the frustum), then not a problem.

--
Dave Eberly
eb...@ma...
http://www.magic-software.com