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Re: [Manta] Rebuilding KD-tree/BVH


Chronological Thread 
  • From: Thiago Ize <thiago@cs.utah.edu>
  • To: ollie@lanl.gov
  • Cc: manta@sci.utah.edu
  • Subject: Re: [Manta] Rebuilding KD-tree/BVH
  • Date: Thu, 21 Feb 2008 16:38:56 -0700
Acceleration structures are built over the geometry (like triangles), so you only need to rebuild when the geometry changes. So camera, no; transformation, yes.

Thiago

Li-Ta Lo wrote:
Hi,

I don't know too much about kd-tree/BVH except that they partition the space so we don't have to do intersection test of a ray with all the primitives in the scene. My question is do we have to rebuild it every
time we move the camera? How about transformation on the object?

Ollie




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