Subject:
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Re: Help needed with torus primitive
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sat, 14 Jan 2006 14:47:26 GMT
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Viewed:
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2488 times
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In lugnet.cad.dat.parts, Niels Karsdorp wrote:
> Hello,
>
> I haven't used much torus primitives and I don't understand how to
> get the values to use them, yet.
> Now I am working on a part that needs an inner torus.
> The radius for the torus is 15 LDU
> The inner radius is 11 LDU
> What torus do I need, and when it does not exist, how do I create one?
>
> Niels
The naming convention is detailed in the Primtives Reference -
http://www.ldraw.org/library/primref/#curv3d
Since these primitives are normalised with an outer radius of unity, the last
four characters of the file you require will be derived from the first four
decimal digits of the fraction 11/15 = 0.733333 - so 7333.
The primtives can be constructed with Paul Easter's primitive generator,
available at :
http://www.geocities.com/pneaster/prim-gen.htm
Chris
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Message has 1 Reply:
 | | Re: Help needed with torus primitive
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| (...) I was a bit confused about all radiusses involved: * Major radius (the radius of the centre of the torus) * Inner radius (for inner torus) * Outer radius (for outer torus) * Torus radius It seems that the value is the fraction torus (...) (19 years ago, 14-Jan-06, to lugnet.cad.dat.parts)
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Message is in Reply To:
| | Help needed with torus primitive
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| Hello, I haven't used much torus primitives and I don't understand how to get the values to use them, yet. Now I am working on a part that needs an inner torus. The radius for the torus is 15 LDU The inner radius is 11 LDU What torus do I need, and (...) (19 years ago, 14-Jan-06, to lugnet.cad.dat.parts)
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