Subject:
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Re: LDD vs LDraw
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Newsgroups:
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lugnet.cad
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Date:
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Wed, 13 Dec 2006 22:28:25 GMT
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Viewed:
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1810 times
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On Dec 13, 2006, at 8:58 PM, Travis Cobbs wrote:
> Obviously I have some bias, being the author of LDView, but I think
> at the very
> least that the first five points above are valid. It's worth
> noting that LeoCAD
> has the first two points covered. (LeoCAD also has blended
> transparency instead
> of stipple, but it draws parts in their entirety all at once. So
> if you have
> two different colored transparent pieces connected to each other,
> you get some
> odd effects at some angles.)
Unfortunately this is a tradeoff between quality and speed, if I
sorted by triangle it would give better results but would also be
much slower to render. There are other options for transparency
sorting, like doing a Z init pass or rendering only front faces.
Also, for #3 in LeoCAD if you use the Zoom Extents before rotating
you'll rotate around the model center.
Leonardo
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Message has 1 Reply:
 | | Re: LDD vs LDraw
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| (...) You might be surprised about the performance. LDView cheats and only sorts the centroids of the transparent triangles, but it does do a brute force sort (via qsort()) of all transparent triangles every frame (assuming you have that option (...) (18 years ago, 14-Dec-06, to lugnet.cad)
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Message is in Reply To:
| | Re: LDD vs LDraw
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| (...) While mostly true, I think you're minimizing the utility that a really good 3D view could provide to MLCad. (Note that this isn't meant as a put-down of MLCad; implementing a really good 3D view requires effort that might best be used for (...) (18 years ago, 13-Dec-06, to lugnet.cad, FTX)
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