Moved third-party libraries to a separate subdirectory

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-> Hi John,

->

-> I know I'll forget to tell you this if I don't write it right now....

->

-> >(2) How is the receiving geometry for the shadow decided?

->

-> I wrote about an LSS-test but actually performing a new VFC test (from the

-> light's view) is the same. In both cases, here's a trick to take advantage

-> of temporal coherence : test the world against a slightly larger than

-> necessary LSS or frustum. Keep the list of touched surfaces. Then next

-> frame, if the new volume is still contained within the previous one used

-for

-> the query, you can reuse the same list immediately. Actually it's a bit

-> similar to what you did in your sphere-tree, I think. Anyway, now the

-O(log

-> N) VFC is O(1) for some frames. It's not worth it for the "real" VFC, but

-> when you have N virtual frustum to test to drop N shadows, that's another

-> story.

->

-> Two downsides:

-> - You need more ram to keep track of one list of meshes / shadow, but

-> usually it's not a lot.

-> - By using a larger volume for the query you possibly touch more

-> faces/surfaces, which will be rendered in the shadow pass. Usually it's

-not

-> a problem either since rendering is simply faster than geometric queries

-> those days. But of course, "your mileage may vary".

->

-> Happy new year !

->

-> Pierre