Subject:
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Re: Parts as volumes (instead of surfaces)
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Newsgroups:
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lugnet.cad.dev.org.ldraw
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Date:
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Thu, 11 Apr 2002 14:02:16 GMT
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Viewed:
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304 times
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In lugnet.cad.dev.org.ldraw, Damien Guichard wrote:
> Thanks to Eric Olson for more precision: he used bounding boxes, not collisions.
Maybe I'm missing a technical distinction, but it seems he used bounding
boxes *for* collision detection, as opposed to using exact volumes.
> Also I still think, whereas higher order convex volumes as cubes much
> simplify decomposition, you can not remove tetrahedron for hill cases.
> Because it the most atomic volume and can not be built using cubes.
True.
My point was, marking up the LDraw part files for volume decomposition
would either:
a) Be low-effort, but result in very inefficient decompositions
b) Be high-effort, and give efficient volumes, but would essentially be
a separate definition of the parts (ie, it would not be based on the
existing lines and polygons).
Steve
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Message has 1 Reply:
 | | Re: Parts as volumes (instead of surfaces)
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| (...) "marking up" would be better done by machine algorithm, and would encompass the Connection Point proposal at the same time. It would indeed yield a separate definition of the parts. A lot of high-end CAD programs read polygons (like we have) (...) (22 years ago, 11-Apr-02, to lugnet.cad.dev.org.ldraw)
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Message is in Reply To:
| | Re: Parts as volumes (instead of surfaces)
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| (...) Well, I can have a twisted mind sometimes. I know these moments when the best idea today, will just be plain stupid tomorrow. Thanks to Eric Olson for more precision: he used bounding boxes, not collisions. Also I still think, whereas higher (...) (22 years ago, 10-Apr-02, to lugnet.cad.dev.org.ldraw)
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