Subject:
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Re: Idea, using functions for some primitives.
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Newsgroups:
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lugnet.cad.dev
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Date:
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Mon, 6 May 2002 14:57:19 GMT
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Viewed:
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344 times
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In lugnet.cad.dev, Mark Kennedy wrote:
> I was thinking over this the other day, and thought maybe could be some sort of
> line type p that would work the same as the type 1 lines, but istead take a
> function instead of a piece. This would be for primitves that the drawing
> program replaces with TRUE shapes, (spheres, cylinders, circular edges, discs,
> ndisc, toruses, rings, and cones) for the cylinders, circular edges, discs,
> and ndisc you could give an argument of the angle so you could have like 56
> degrees of a disc or 74 degrees of a cylinder. For the toruses, rings, and
> cones you would also suplly inner and outer radii. As for the sphere, you would
> supply the primary and secondary angle given by spherical cooridante system
> (the radius would be set to one to comply with the previous sphere primitives),
> then maybe it could be used on some of those3 round parts like the radar
> dishes. I know this would probably require a total rewrite of the ldraw code,
> but maybe just something to consider along with MPD capability.
For a linetype to include a 'function' in it's definition, we'd need to
figure out what 'language' the functions would be written in. It's a
fairly wide-open proposal.
More likely, we'll add specific curved-surface primitives[1] at some
point. Like linetype 6 for discs, or linetype 7 for sphere sections,
and so on.
--
Steve
1) 'Primitive' in the normal CG sense of the word - an object generated
by the core CG language.
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Message is in Reply To:
 | | Idea, using functions for some primitives.
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| I was thinking over this the other day, and thought maybe could be some sort of line type p that would work the same as the type 1 lines, but istead take a function instead of a piece. This would be for primitves that the drawing program replaces (...) (22 years ago, 5-May-02, to lugnet.cad.dev)
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