Subject:
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Re: Stud5 and type 5 lines at edge of cylinders.
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Newsgroups:
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lugnet.cad.dat.parts.primitives
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Date:
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Thu, 2 Oct 2003 03:39:36 GMT
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Viewed:
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3675 times
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In lugnet.cad.dat.parts.primitives, Paul Easter wrote:
... “mess” ... deleted :-)
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Ok... I’m a bit lost is all this mess.
I need to know where we stand on this issue. I have a Primitive Generator
program written with Visual Basic available for people to download and use. If
I • have handled this incorrecly, I need to know so I can try to fix the
program.
I brought this up again, since I was reviewing my previous votes on the Parts
Tracker;
http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=p/1-16cyli.dat
Paul
If you would like to try out the Primitive Generator, it can be downloaded
from • this page;
http://www.geocities.com/pneaster/prim-gen.htm
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I believe the consensus was that the line between the last edge and the control
point hanging out in space should be tangent to the cylinder, that this will
help cases where the cylinder meets a box at right angles, and that it will help
(but not fix) the S-curve problem.
So, on a quarter cylinder, the line (which of course wouldn’t be drawn) between
the edge of the cylinder and the control point in space is represented by the
red lines in this diagram:
With the above style type 5 lines, you have to have a type 5 line at both ends,
or it won’t work right (hence the two red lines). I’m not sure if I’m
describing this well.
I’m not sure we got a consensus about doing things like the above, but on the
other hand, I don’t think anyone objected.
--Travis Cobbs
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Message has 1 Reply:
 | | Re: Stud5 and type 5 lines at edge of cylinders.
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| (...) That's what I was afraid of... That is not how I handled it in the program. So, now this should apply for any segment files, right? 1-16,1-8,3-16,1-4,7-48, etc? If so, I will have to rethink how to calculate those points. now... this brings us (...) (21 years ago, 2-Oct-03, to lugnet.cad.dat.parts.primitives, FTX)
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