Subject:
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Re: Maximum depth of ldraw models?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Fri, 8 Sep 2006 21:29:21 GMT
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Viewed:
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2464 times
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> LDView behaves similarly, although it doesn't do any joining aside
> from its primitive substitution. But since it uses vertex arrays,
> it turns out that joining into strips and fans can actually
> sometimes be detrimental to performance, since each strip and fan
> requires a separate API call, while all the triangles (for instance)
> can be drawn with a single API call. So unless the strips get above
> some threshold (which is video-card dependent), they'll actually be
> slower. Also, I use multiple display lists for each part in order
> to be able to handle the default color and the highlight color while
> still drawing that geometry in a display list.
Actually on modern cards strips are always slower than optmized lists. You
can always try adding degenerate triangles to stitch strips together to save
the cost of multiple render calls (too bad PC cards don't support a primitive
reset index).
Leonardo
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Message is in Reply To:
 | | Re: Maximum depth of ldraw models?
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| (...) Same here for LDView. LDView always flattens part geometry, and this seems to improve performance enough to be noticed. LDView does use a display list for each part, and a nested display list for each nesting level above that (as long as you (...) (18 years ago, 7-Sep-06, to lugnet.cad.dev)
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