Subject:
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Re: L3P user primitive substitution
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Newsgroups:
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lugnet.cad.ray
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Date:
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Mon, 4 Dec 2000 17:13:46 GMT
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Viewed:
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1863 times
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In lugnet.cad.ray, Chuck Sommerville wrote:
> Awhile back, I persuaded Lars Hassing to add a feature to L3P. I wanted the
> ability to substutite POV language commands in the comments of a .DAT file
> that could be used in place of the DAT primitives when rendering through
> POV. This would allow users to add native POV commands that could render
> better than the triangles and polygons defined in DAT files.
This is a very cool feature, for anyone 'rolling their own'. I'd
definitely recommend it for including scanned/bitmap images (like printed
tiles), as the POV-Ray versions will be far superior to an BMP2DAT2POV-Ray
conversion.
For official parts, what I'd *love* to do is to build a separate library of
POV-Ray parts that are made to be compatible with LDraw settings, in terms
of placement, orientation, and coordinate system. These parts would match
their LDraw counterparts in positioning, but wouldn't have to have anything
in common at the code level. They could be much higher quality (rounded
edges, true curved surfaces, etc., etc.). This would allow people to
create models in LDraw, but then use the POV-Ray parts for rendering.
Having a high-quality library in POV-Ray could also free us from some "need
for quality" issues in LDraw, because the LDraw representation wouldn't
(necessarily) be the end-all of our efforts.
> Since the
> commands are inbedded in comment fields, and only recognized by L3P, they
> have no effect of any other tools.
Except they increase the size of the parts library. Disk space may be
cheap, but it's still not free, and many people still use modems to
download. Bigger files cost them time (and often money, too).
Steve
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Message has 2 Replies:
 | | Re: L3P user primitive substitution
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| (...) Lutz Uhlman's LGEO library does just this with some exceptions. It is a high quality library of many of the parts from LDraw in POV-Ray. It has a slightly steeper learning curve as compared to using L3P but I would still recommend it to anyone (...) (24 years ago, 4-Dec-00, to lugnet.cad.ray)
| | | Re: L3P user primitive substitution
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| (...) The L3GO parts could be folded in using this method. (...) In general, the POV definitions are much smaller than the DAT counterparts, so the size increase is menimal. However, perhaps a set of files that could be downloaded seperately and (...) (24 years ago, 4-Dec-00, to lugnet.cad.ray)
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Message is in Reply To:
| | L3P user primitive substitution
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| Awhile back, I persuaded Lars Hassing to add a feature to L3P. I wanted the ability to substutite POV language commands in the comments of a .DAT file that could be used in place of the DAT primitives when rendering through POV. This would allow (...) (24 years ago, 3-Dec-00, to lugnet.cad.ray)
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