Subject:
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Re: Things that are hard to do with LDraw and building instructions
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Newsgroups:
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lugnet.cad
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Date:
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Wed, 9 Mar 2005 20:30:50 GMT
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Viewed:
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3001 times
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In lugnet.cad, Don Heyse wrote:
> In lugnet.cad, Kevin L. Clague wrote:
>
> > Whenver I build a LEGO model, I always pay attention to things that they can
> > do that we cannot, or we cannot do easily. One of the things that is very hard
> > to do is, change the shape, orientation or location of a part added in previous
> > steps.
>
> > So far, in the LDraw file format, a usage of a type 1 record (line) is
> > anonymous, meaning that the only way you can really identify a given part usage
> > is by the line number that the part is on.
> >
> > What if we were able to assign a name to a given part usage in an LDraw file.
> > This would allow selective deletions of specific parts anytime after the
> > creation of the named part. After the deletion, we could instanciate a new part
> > to take its place. This would work very well for hoses that are rebent or make
> > their final connection many steps after the first connection.
> >
> > We would only bother to name specific part usages, and the remainder of the
> > lines would continue to remain anonymous.
>
> I suppose you could use the mlcad GROUP meta-command to name your parts.
> Then perhaps you could invent a SUBSTITUTE meta-command to substitute one
> group for another? I don't know, it could work.
Yes. I realized after I wrote the above that MLCad GROUPS are a good way of
naming, since they already exist.
Even simply being able to remove all parts in a group from the model would be
sufficient. Then you could add a new part or parts to replace it.
>
> Enjoy,
>
> Don
Thanks,
Kevin
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