Subject:
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Re: Several replies to CLIPPING / WINDING
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 20 Oct 1999 10:24:35 GMT
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Reply-To:
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rui.martins@NOSPAMlink.pt
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Viewed:
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573 times
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On Tue, 19 Oct 1999, Lars C. Hassing wrote:
> <SNIP>
> Wait a minute, you were not going to actually send winding state changes
> to the graphics engine?
> Simply keep track of the state yourself and send either vertices 1,2,3
> or 3,2,1.
NO,
I said that, to be used when optimizing the existent files, not when
rendering the optimized files.
> The part author can use as many WINDING CW/CCW as he likes
> - it won't hurt performance a bit!
I never said that !
> I have already done that. After reading a part into memory I index it.
> It typically reduces the number of vertices and thus transformations
> to 20-50%. However, as the math currently takes less than 10% of the
> rendering time in L3, the total saving is only 2-5%
I think that depends on the host processor that you have and your
specific graphics board (2D/3D) ;)
> I don't think it is that difficult: a part may use 2.0001 or 1.99998 in
> stead of 2, but not for the same vertex. If it did there would be gaps,
> which of course should be fixed.
> /Lars
I have seen some parts, with this tipical error.
Rui Martins
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Message is in Reply To:
 | | Re: Several replies to CLIPPING / WINDING
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| Rui Martins wrote in message ... (...) Wait a minute, you were not going to actually send winding state changes to the graphics engine? Simply keep track of the state yourself and send either vertices 1,2,3 or 3,2,1. The part author can use as many (...) (25 years ago, 19-Oct-99, to lugnet.cad.dev)
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