RE: [Algorithms] Tri strips over tri list???

[Tyson J. <twj...@sa...>]

As mentioned, degenerate tris to merge lists are your friend.  And, as
mentioned, for PSX2 you don't need to care.

There is no perfect answer to the more generic question, "How long
should I search for a good stripping solution to a given arbitrary
mesh."  The kludgy answer is to keep trying until the artists start
whining about how long the exporter takes and then back off. ;)
Seriously, you can make it an adjustable parameter so the really
critical stuff you get to try 100+ possible stripping solutions and pick
the best, everything else just gets patched together.  (Each iteration
trys a different set of input numbers and then you have to write a
"goodness" function to determine how many cache misses you get.  MS
gives sample code to do this.)

Now you get the question of "what are good input parameters to my
stripper?"  That's a big can of worms and I'd suggest finding some of
the heavy-hitting research before making a final decision about that.

-----Original Message-----
From: gda...@li...
[mailto:gda...@li...] On Behalf Of
Nguyen Binh
Sent: Sunday, November 17, 2002 11:26 PM
To: Developer-only Forum for DirectX programming issues;
Gdalgorithms-List; Pierre Terdiman
Subject: [Algorithms] Tri strips over tri list???


Hi ,

   I have a problem when stripping my tri list:

1. It's fine when I get just one strip for the whole mesh.
But on a random mesh, hardly can I get such result.
Maybe the result looks like this :

      Mesh contains 5 tri strips with tris number: 2000, 100, 50, 20
      , 10
      When render it, I may get a worse result than render it as one
      bunch of tri list because I had so many "bad" tri strips that
      contains only small number of tris and it kills many cycles of
      the driver to update.

      So I came across an idea : When my strip contains lesser of tris
      than a number, say N then I will reput it in a tri list.So , my
      result will be a list of tri strips that contains a "resonable"
      number of tris (>= N) and a tri list.

      My question is: what is the resonable value for N?
      If thte answer depends on video card then I just like to know
      the value for a generic Geforce2 MX card.


Thanks very much.

-- 
Best regards,

---------------------------------------------------------------------
   Nguyen Binh
   Software Engineer
   Glass Egg Digital Media
   Me Linh Point Tower, 10th Floor
   2 Ngo Duc Ke
   District 1, Ho Chi Minh City
   Vietnam
   Fax:  (84.8)823-8392
     www.glassegg.com
---------------------------------------------------------------------




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