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 20:16:40 GMT
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Viewed:
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1268 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?
Good summation. My preference is 1... a sufficiently clever convertor could
perhaps detect this rotation and use rotated versions of the studs that it
substitutes somehow in a preprocess step???
If there is a way to do 2 (perhaps with a comment or keyword similar to BFC to
denote that there is an extra mirroring somewhere??? but no other change to the
part...) that might work but it would require a lot of parts to change. I would
be opposed to the parts being completely recreated.
Thanks for bringing this up. My opinion is easily swayed, BTW...
Also I have another issue to surface/resurface which I iwll do in a separate
post
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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 (...) (21 years ago, 1-Jul-03, to lugnet.cad.dev)
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