Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Mirrored parts and studs
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 1 Jul 2003 19:14:28 GMT
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Viewed:
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3017 times
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In lugnet.cad.dev, Orion Pobursky wrote:
> There is somewhat of a disagreeance going on over at the PT about mirrored parts
> and I thought I'd bring it to the whole community to discuss.
>
> Here's a little background for the non initiated:
>
> In order to same time and DAT code if a part has a mirrored brother then one
> part reference the other and applies a mirrored matrix. For example, the
> Technic Panel #1 just references Technic Panel #2 and applies the matrix
>
> -1 0 0 0 1 0 0 0 1
>
> This is the preferred way to represent a mirrored part pair. There is no
> disagreement about this methed of coding parts. The problem comes in when you
> add studs.
>
> If you have stud the the part and apply a mirror matrix, most of the time
> nothing is wrong. Along comes L3P or LDView that, based on user preference, add
> the LEGO logo to the top of the studs. If the part is a mirror part then the
> added logos also show up mirrored. Here's where we get 2 dissenting opinons:
>
> 1.) Nothing is wrong with the part. The stud logos are added by an external
> program and are not part of the DAT code. This is, therefore, a limitation of
> the external program and not of the part itself.
>
> 2.) The part itself is flawed in that the studs are mirrored. We should redo
> all the mirrored parts with stud in such a way that the studs are not mirrored.
>
> My question to the reader of this post is:
>
> What do you prefer?
>
> I'm axious to get a resolution on this since many otherwise good part are being
> held up because of this issue.
>
> -Orion
I favour the following scenario - put the part detail in a subpart, but the
studs themselves in the main part files.
s\xxxxs01.dat
bulk of part excluding decorated surfaces and studs (handedness of lowest
numbered part)
xxxx.dat
1 0 0 0 1 0 0 0 1 0 0 0 1 s\xxxxs01.dat
4s and 3s for decoration
x y z 1 0 0 0 1 0 0 0 1 stud.dat (correctly orientated for LEGO logo)
xxxy.dat
1 0 0 0 -1 0 0 0 1 0 0 0 1 s\xxxxs01.dat
4s and 3s for decoration
x y z 1 0 0 0 1 0 0 0 1 stud.dat (correctly orientated for LEGO logo)
Chris
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Message has 2 Replies:
 | | Re: Mirrored parts and studs
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| I am generally against new meta-commands, but inspired by "0 BFD INVERTNEXT", how about something like "0 MIRRORING KEEPPOSITIVENEXT". The more accurate syntax, I leave to the gurus... /Tore (23 years ago, 1-Jul-03, to lugnet.cad.dev)
| | | Re: Mirrored parts and studs
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| (...) Thats what i did with the re-upload of some files from the 2865.dat & 32087.dat parts (9V straight track, 9V track cross ) and the recently posted 2867.dat (9V Curved track). I moved the studs from the subparts to the main file. With the (...) (23 years ago, 1-Jul-03, to lugnet.cad.dev)
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Message is in Reply To:
| | Mirrored parts and studs
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| There is somewhat of a disagreeance going on over at the PT about mirrored parts and I thought I'd bring it to the whole community to discuss. Here's a little background for the non initiated: In order to same time and DAT code if a part has a (...) (23 years ago, 1-Jul-03, to lugnet.cad.dev)
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