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Subject: 
Re: Datsville continuation - more ideas
Newsgroups: 
lugnet.cad, lugnet.cad.dev, lugnet.cad.ray
Date: 
Tue, 14 Aug 2001 18:40:07 GMT
Viewed: 
942 times
  
Doesn't POVray do this inately?  After all, at some point POVray has to
decide which information it will display, and which information it will not
display.

If I understand the question correctly, and from my understanding of how a ray-
tracer works, Pov-ray must keep all polygon data while it renders since it
"traces" all the light rays, even those that you can't see (inside of a brick).
It doesn't clip the top/bottom/left/right or eliminate backsides, or z-buffer
until it has done all the lighting calculations.

Ok, I haven't really experimented very much with omitting polygons from
LDraw models (I said I would in previous posts... but...).  But, after all
invisible lines/boxes have been deleted, how many polygons are left over in
comparison to those in, say, Unreal or Quake?

Ldraw has a ton of extra polygons compared to Unreal or Quake.  It would be
possible to optimize a model by writing a utility that does it's own "ray-
tracing" and eliminates all polygons that don't see the light of day.  However,
this is a big project, and is way over my head.

Just my 2 cents.

--

Thanks:

James Reynolds
http://www.cc.utah.edu/~jer29950
james.e.reynolds@m.cc.utah.edu
james@mail.mlmc.utah.edu



Message has 1 Reply:
  Re: Datsville continuation - more ideas
 
Hey, no problem. I just browse Lugnet every once in a while to see if any progress on such a utility exists. I notice there has been little mention of such a thing in the newsgroups in the past. It would be a "cool" toy. Thanks, Mike (...) (23 years ago, 15-Aug-01, to lugnet.cad, lugnet.cad.dev, lugnet.cad.ray)

Message is in Reply To:
  Re: Datsville continuation - more ideas
 
(...) I don't know. That's why I asked. :o) I will try to render a lot of ttore.dat's in a model and compare the time used to the time used to render the same model with box replacements. (...) Yes, but how do we accomplish that still avoiding bad (...) (23 years ago, 13-Aug-01, to lugnet.cad, lugnet.cad.dev, lugnet.cad.ray)

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