Subject:
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Re: New primitives?
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Newsgroups:
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lugnet.cad
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Date:
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Sun, 30 Mar 2008 08:11:31 GMT
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Viewed:
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4290 times
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In lugnet.cad, Andrew Westrate wrote:
I wasn’t aware of the tang primitive, and I had forgotten about the chrd
primitive. Going from the chrd primitive to the proposed truncated disc
requires the addition of one triangle, and the total number of triangles after
adding that one is still the minimum needed to code the primitive. So I’d
definitely say that the chrd primitive is the way to go here.
The not-truncated-disc is harder to construct from the tang primitive. For the
1/8th case, it requires three extra triangles, and this yields 5 total
triangles, vs. the minimum of 2 that are required. I’m not sure there’s any
point to versions other than 1/8th. Having said all that, the tang primitive is
more versatile, since the geometry in it is so slim that it will fit any almost
any conceivable place where there’s stuff outside a circular hole.
--Travis
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Message is in Reply To:
 | | Re: New primitives?
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| (...) There are already circle chord and tangent primitives on the parts tracker. You would just need to add a couple of triangles to get the ones you're proposing. See: (2 URLs) (17 years ago, 30-Mar-08, to lugnet.cad, FTX)
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