Subject:
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Re: P and Parts directory WHY?
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Newsgroups:
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lugnet.cad
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Date:
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Mon, 18 Mar 2002 18:26:39 GMT
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Viewed:
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814 times
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In lugnet.cad, Ahui Herrera writes:
> Why does Ldraw have a P and Parts directory? Furthermore why does the P
> have a 48 sub-directory and the Parts have a S sub-directory? I'm just
> curious as to the need for all these directories and sub-directories? What
> happens find I just lump all the files under PARTS?
>
> Thanks
> Ahui
I felt sure that this info should be in the FAQ somewhere, but I couldn't find
it easily.
The main reason is historical - it is the way that James organised the files
for the original LDraw/LEdit programs. But it does serve to segregate DAT files
with different scopes and purposes.
ldraw\parts - one file for each unique part
ldraw\p - highly re-used primitives (circular parts are 16-agons)
ldraw\p\48 - 48-agon versions of some circular parts in ldraw\p
ldraw\parts\s - subparts :
- subparts are necessary for two reasons
1) dithered colour patterns due to an LDraw limitation - dithered colours
are only rendered by LDraw when specified on a type 1 line
2) shells for frequently patterned parts (eg 973s01) to ease maintenance
and reduce duplication of common code
- subparts are advisable for no-so-highly re-used part elements, but there has
been some philosophical discussion recently on when to use subparts - see
http://news.lugnet.com/cad/dev/?n=6944
In theory you could put ldraw\p files in ldraw\parts, but the I believe the
intention is for the ldraw\parts directory to also act as a catalog of known
parts.
You cannot combine files from ldraw\p and ldraw\p\48 as these are different
resolution versions of the same named primitive - the names deliberately clash.
You cannot put ldraw\parts\s files in ldraw\parts. They will not be found
because the reference in the main part dat file will be of the form
1 colour x y z a b c d e f g h i s\<subpartname>.dat
Chris
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Message is in Reply To:
 | | P and Parts directory WHY?
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| Why does Ldraw have a P and Parts directory? Furthermore why does the P have a 48 sub-directory and the Parts have a S sub-directory? I'm just curious as to the need for all these directories and sub-directories? What happens find I just lump all (...) (23 years ago, 18-Mar-02, to lugnet.cad)
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