Non-linear transformation of pfGeoSet

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Daniel Weiskopf (weiskopf++at++tat.physik.uni-tuebingen.de)
Thu, 19 Feb 1998 14:03:52 +0100

Hello,

I am a beginner at Performer programming. I have the following

PROBLEM:
 For each frame, the vertices (coordinates and normal vectors)
 of the geometry (pfGeoSet) have to be transformed by a given
 non-linear mapping (for special relativistic visualization).
 To put it another way, this transformation can NOT be expressed
 by a normal 4x4 matrix. I'd like to achieve a frame-accurate
 behavior on a multiprocessing architecture.

My ideas so far:
 The manual suggests four solutions for frame-accurate behavior:
   1) passthrough data mechanism
   2) frame-accurate pfSwitch
   3) pfCycleBuffer
   4) fluxed geosets/engines
 The transformation might be incorporated in application traversal.

My question:
 Does anyone have any experience with a similar problem? In particular,
 I am interested in performance aspects/differences. Is it a good idea
 to put the transformation in the application traversal?

TIA,

Daniel

-- 
Daniel Weiskopf
weiskopf++at++tat.physik.uni-tuebingen.de
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