Subject:
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Re: 2nd. Idea for a new feature to help rotation of parts in Ldraw Cad software
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Newsgroups:
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lugnet.cad
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Date:
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Fri, 25 Aug 2000 16:47:02 GMT
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Reply-To:
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jsproat@#AntiSpam#io.com
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Viewed:
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694 times
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Michael Lachmann wrote:
> In MLCad I would like to use:
> 0 ROTATION CENTER "Name" x y z <mf>
> 0 ROTATION AXIS "Name" x1 y1 z1 x2 y2 z2 <mf>
> 0 ROTATION CONFIG <arp> <vf>
Looks good so far!
> where:
> "Name" is used to give this point or axis a name which allows to select it
> from a list of points or axis.
Cool, thanks! :-,
> <mf> is a modification flag which indicates if the point can be modified from
> an editor or not 0 = do not modify, 1 = modify ok
Looks good. I suggest that the <mf> can be set from inside MLCad, like a
file's read-only bit in a file manager.
> The ROTATION CONFIG will be used in MLCad to save the current config within
> the file the parameters are:
Sounds like you'd want just one per model. How would you handle more than
one ROTATION CONFIG line?
> <arp> Actual Rotation Point ... which can be
> 0 = Parts Origin
> 1 = Parts Center
> 2 = Parts Active Rotation Point
> 3 = World Origin
> 4 .. n = User defined Rotation Point 4 is the first defined, 5 the second ..
Suggestion: make the "static" point numberss negative, and the user-defined
point numbers positive (or vice-versa). e.g.:
-3 = Part's Origin
-2 = Part's Center
-1 = Part's Active Rotation Point
0 = World Origin
1 = 1st user-defined point
2 = 2nd user-defined point
etc.
(Now seeing that Marc suggested the exact same thing...oh well. :-)
Another, possibly more human-readable way to do this would to refer to the
user-defined points by name, rather than their ordinal number. i.e., a
non-numeric string would be assumed to be a lookup value in your axis
hashtable. e.g.:
0 = Parts Origin
1 = Parts Center
2 = Parts Active Rotation Point
3 = World Origin
right_hinge = user's "right hinge" named axis
left_hinge = user's "left hinge" named axis
etc.
An example line to demostrate:
0 Next line is the named rotation axis for the left arm
0 ROTATION CONFIG left_arm_axis 0
> <vf> Visible flag for rotation point, if 1 the point will be display,
> otherwice not.
Again, a great idea.
> There must not be any ROTATION CENTER or ROTATION AXIS command after the
> ROTATION CONFIG!
Good.
Wow, thanks for formalizing this! I'm getting stoked already! :-,
Cheers,
- jsproat
--
Jeremy H. Sproat <jsproat@io.com> ~~~ http://www.io.com/~jsproat/
Is it still illegal if I copy just the FBI warning?
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