Subject:
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Re: Making parts: circles
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Newsgroups:
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lugnet.cad
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Date:
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Tue, 29 Aug 2006 01:28:51 GMT
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Viewed:
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1250 times
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In lugnet.cad, Daniel Collis wrote:
> I apologize if this is a oft asked question: but where is the best place to
> learn how to create a non-official part? I'm specifically looking to make rings
> of specific inch/mm sizes. What I found on LDraw seemed to go over my head, nor
> can I figure out how much inch/mm on LDU is equal to. Maybe I'm looking too hard
> and overlooking info. Help???
I'm not sure there's one place to go for help. You should probably start by
reading the LDraw file format spec on ldraw.org. After that, you pretty much
need to dive in and start playing around with some files.
However, I can tell you that 1 LDU = .4mm.
Also, if you look in your ldraw\p directory, you should find a number of files
for discs, circles, and rings with names like *disc.dat, *edge.dat, and
*rin*.dat. These files are all based on a 16-segment approximation of a circle.
If you need an approximation with more segments, look in ldraw\p\48.
I hope this gives you something to go on. Please ask for more help if you still
have questions. :)
Steve
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Message has 2 Replies:
 | | Re: Making parts: circles
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| (...) The primitive generator ((URL) can also be used to create rings of any inner diameter. Generated rings (as opposed to edges) always have a width of 1LDU, so a ring with an inner diameter of 8LDU has an outer diameter of 9LDU. While this seems (...) (18 years ago, 29-Aug-06, to lugnet.cad)
| | | Re: Making parts: circles
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| (...) steve, you'll never get me to agree to this rounding - never ever ;-) (URL) daniel, 1 LDU = 0.015625 inch = 0.396875 mm or just use paul easter's lcad calculator at (URL) w. ps. I suggest to handle this over to the LSC. they can add it to the (...) (18 years ago, 29-Aug-06, to lugnet.cad)
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Message is in Reply To:
| | Making parts: circles
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| I apologize if this is a oft asked question: but where is the best place to learn how to create a non-official part? I'm specifically looking to make rings of specific inch/mm sizes. What I found on LDraw seemed to go over my head, nor can I figure (...) (18 years ago, 29-Aug-06, to lugnet.cad)
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