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 15:09:36 GMT
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Viewed:
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4124 times
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In lugnet.cad.dev.org.ldraw, Steve Bliss writes:
> My point was, marking up the LDraw part files for volume decomposition
> would either:
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> 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).
"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) and cleverly
construct solids. These programs buy their solids-based engine wholesale
(IGES for one.)
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Message is in Reply To:
 | | Re: Parts as volumes (instead of surfaces)
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| (...) Maybe I'm missing a technical distinction, but it seems he used bounding boxes *for* collision detection, as opposed to using exact volumes. (...) True. My point was, marking up the LDraw part files for volume decomposition would either: a) Be (...) (24 years ago, 11-Apr-02, to lugnet.cad.dev.org.ldraw)
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