Subject:
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Re: Thoughts on File Format for LDraw Animation
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 26 Oct 2005 20:00:09 GMT
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Viewed:
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2626 times
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In lugnet.cad.dev, Anders Isaksson wrote:
> Kevin L. Clague wrote:
>
> > So a super-set of LDRAW 1.0.0 file format is needed that lets you
> > define compound parts (separate ldraw file?) and have the whole part
> > and all sub-components named. With names, you can modify attributes,
> > rotation, position, color, part type....
>
> Isn't that more or less an MPD? By *not* reusing sub-models you get a unique
> name for every group, sub-group etc.
>
> Or am I misunderstanding something?
LDraw mixes part type and part name........
For library parts, we specify its part type (filename). For sub-models we
specify its filename (same thing in both cases).
In C++ we have classes, and instance of classes. In LDraw the names of the
instance of classes don't exist, only the type of the thing.
Parts do not have names only types, so none of the instances or parts can be
operated on after its definition..... I cannot simply remove a given part that
was added in the past. I have to use CLEAR or BUFFEXCHG tricks to give the
appearance of a single part being removed.
If part instances had names, then I could "TRANSLATE 1 0 0 cabby" which would
move the previously defined minifig named cabby right one LDU.
MPD does not help this in any way, because again, there is only part type (file
name) and no instance name.
LDraw has no support for the naming of instances part usages.
I can think of a number of places where instance names would be a great help.
Kevin
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Message has 1 Reply:
 | | Re: Thoughts on File Format for LDraw Animation
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| (...) But as I said, if you put all instances, that need to be named, in a subfile of its own you *have* named instances. It wouldn't be too difficult to write a helper program (or add-on) that does this folding for you (creating a subfile of (...) (19 years ago, 26-Oct-05, to lugnet.cad.dev)
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