T'vakah wrote:
> 
> I'm a little lost on this idea of bounding.  I have read about it in the
> manuals, but have not been able to grasp the concept very well.  How can one
> use it to speed up rendering, and what exactly is it?  Any input is very
> appreciated.

Imagine for a moment that you have a tree-shaped object, with hundreds of
branches and leaves in it.  To test a ray against each and every object in
the tree would take a very long time.

A great deal of these rays tested will miss the tree entirely, and in fact
would not even hit the smallest sphere that could contain the whole tree;
if these rays are tested against the sphere first, then the ones that miss
the sphere obvious will not hit the tree, and do not need to be tested
against it.

That's the basic idea of bounding:  Surrounding a complex object with a
simple object to more quickly eliminate many of the rays that won't hit
the object.

Regards,
John
-- 
ICQ: 46085459

Post a reply to this message