Subject:
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Re: Searching for parts
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 7 Nov 2000 15:33:57 GMT
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Viewed:
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3150 times
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In lugnet.cad.dev, Steve Bliss wrote:
> In lugnet.cad.dev, Lars C. Hassing wrote:
>
> > The FAQ could be updated to:
> >
> > LDraw/LEdit MUST be started in the LDraw directory. They search for files in:
> > 1. P
> > 2. PARTS
> > 3. MODELS
> > 4. .
> >
> > Modern programs should search in:
> > 1. Inside the document if it is an MPD
> > 2. The document's directory
> > 3. %LDRAWDIR%\P
> > 4. %LDRAWDIR%\PARTS
> > 5. %LDRAWDIR%\MODELS
> > where LDRAWDIR is the LDraw directory.
>
> Good point.
I'm glad you agree.
> Your "1. Inside the document if it is an MPD" reminds me: how do renderers
> handle caching of submodels inside an MPD? Are these files visible outside
> of the MPD, or do they lose scope?
>
> With the following files, how will C.DAT render? Will 'some stuff' be
> drawn twice, or will we see 'some stuff' and 'some other stuff'?
>
> A.MPD:
> 0 FILE A.DAT
> 1 16 0 0 0 1 0 0 0 1 0 0 0 1 B.DAT
> 0
> 0 FILE B.DAT
> some stuff
> 0
>
> B.DAT:
> some other stuff
> 0
>
> C.DAT:
> 1 16 0 0 0 1 0 0 0 1 0 0 0 1 A.MPD
> 1 16 0 48 0 1 0 0 0 1 0 0 0 1 B.DAT
> 0
L3P/L3Lab will draw 'some stuff' twice.
The file B.DAT is never loaded, as the subfile B.DAT was loaded
during reading A.MPD.
It doesn't matter whether subfile A.DAT references B.DAT or not.
An MPD should be regarded as a collection of files which is automatically
unpacked before loading, so the scope is public.
I would have preferred the scope to be private...
See also http://news.lugnet.com/cad/dev/?n=4188 (L3P/L3Lab will give
you a warning about roof.dat) and http://news.lugnet.com/cad/mlcad/?n=325
/Lars
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Message has 1 Reply:
 | | Re: Searching for parts
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| (...) That's what I assumed. (...) Does it matter if C.DAT references B.DAT *before* referencing A.MPD? This would change the example to: (...) That makes sense, and is simpler to implement. And could even be useful, under certain circumstances. (...) (24 years ago, 7-Nov-00, to lugnet.cad.dev)
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Message is in Reply To:
| | Re: Searching for parts [DAT]
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| (...) Yeah, I realized (after posting my message), that it was a problem with LDLite handling a subfile which was an MPD. I changed to the equivalent DAT, and everything's fine now. (...) Good point. Your "1. Inside the document if it is an MPD" (...) (24 years ago, 7-Nov-00, to lugnet.cad.dev)
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