Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Weird Logo Issue at L3P Quality Level 3
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Newsgroups:
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lugnet.cad.ray
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Date:
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Fri, 6 Sep 2002 19:14:03 GMT
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Viewed:
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3076 times
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In lugnet.cad.ray, Travis Cobbs writes:
> In lugnet.cad.ray, Steve Bliss writes:
> > Considering the usefulness of modeling mirrored parts this way (one file
> > just references the other file) (it saves time and bytes), I'd say this
> > is a problem that needs resolution in software. I *think* it could
> > addressed with a POV-Ray macro, but I haven't seriously played with
> > POV-Ray in so long, I wouldn't know where to start.
>
> I believe that Lars agrees with you regarding the fact that we can't expect
> parts not to use mirroring. However, based on his knowledge of POV, fixing
> this would require a complete change in the way L3P works. It would have to
> internally flatten everything, and do the mirror checking itself. This
> would result in extremely large POV output files, not to mention being
> generally not very "clean".
>
> If there is a way to fix the problem using a macro, I'm sure Lars would be
> glad to hear it. However, it is my understanding that the problem with POV
> macros (at least in POV 3.1) is that they are only evaluated once. Since
> only some of the studs will be mirrored, this won't help.
How many parts have this mirroring? I expect that the 4x8 wings are an
example. Would it be possible to recreate the basic wing, without studs, as
a sub-part, and then invoke it in the two actual wing files? The studs
could be added in the proper arrangement, like this:
0 PART HACK
1 16 0 0 0 1 0 0 0 1 0 0 0 1 s\hacksub.dat
1 16 20 0 0 1 0 0 0 1 0 0 0 1 stud.dat
1 16 0 0 0 1 0 0 0 1 0 0 0 1 stud.dat
1 16 -20 0 0 1 0 0 0 1 0 0 0 1 stud.dat
1 16 -40 0 0 1 0 0 0 1 0 0 0 1 stud.dat
0
etc, etc, etc. Obviously the specifics of the stud arrangement would be
different, but you get the idea, and it would prevent bizarro-font.
Don't know if this is practical, since I don't know the current thinking re:
subparts, but it seems like a possible workaround.
Dave!
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Message has 1 Reply:
 | | Re: Weird Logo Issue at L3P Quality Level 3
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| (...) [snip] Yes, that would certainly work. And for correct alignment of studs, it will sometimes be the only answer. For example, some parts (30373 is one of them) use mirror symmetry to create a subpart that is a fraction (like 1/4 or 1/8) of the (...) (24 years ago, 6-Sep-02, to lugnet.cad.ray)
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Message is in Reply To:
| | Re: Weird Logo Issue at L3P Quality Level 3
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| (...) I believe that Lars agrees with you regarding the fact that we can't expect parts not to use mirroring. However, based on his knowledge of POV, fixing this would require a complete change in the way L3P works. It would have to internally (...) (24 years ago, 6-Sep-02, to lugnet.cad.ray)
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