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Subject:	Re: Things that are hard to do with LDraw and building instructions
Newsgroups:	lugnet.cad
Date:	Wed, 9 Mar 2005 18:31:03 GMT
Viewed:	1032 times

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. Enjoy, Don

Message has 2 Replies:

		Re: Things that are hard to do with LDraw and building instructions
(...) 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 (...) (20 years ago, 9-Mar-05, to lugnet.cad)

		Re: Things that are hard to do with LDraw and building instructions
(...) Michael, Is this something you would be interested in adding to MLCad? I could add it as an LPUB meta-command, but it would be best if it were an MLCAD meta-command that LPub supports. Kevin (...) (20 years ago, 10-Mar-05, to lugnet.cad, lugnet.cad.mlcad)

Message is in Reply To:

		Things that are hard to do with LDraw and building instructions
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. In (...) (20 years ago, 9-Mar-05, to lugnet.cad)

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