Subject:
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Re: Tangent between two circles in 3D space?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 21 Jan 2003 16:31:46 GMT
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Viewed:
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816 times
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In lugnet.cad.dev, Steven Combs writes:
> In lugnet.cad.dev, Kevin Clague writes:
> > Anyone know how to find out the tangent between two cicles in 3D space?
>
> Wouldn't they have to be on the same plane in order to find the tangency? Or
> did you mean the tangency of two spheres?
I'm sure you're probably looking for a solution with x,y,z coords, but
just in case, the 2D solution is on page 7 of Graphics Gems, and also
here:
http://www.experts-exchange.com/Programming/Game_Development/AI_Physics/Q_11452678.html
I think you should be able to transform your circles into the x,y
plane with one center at the origin, then solve it the Graphics Gems
way, and finally transform the solution line segments back into 3D
space.
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Message has 1 Reply:
 | | Re: Tangent between two circles in 3D space?
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| (...) Don, this is what I do for planar rubber bands and it works great if the two pulleys are in the same plane. But I can imagine a four pulley configuration where the first pulley is parallel to the YZ plane, the second pulley is parallel to the (...) (22 years ago, 21-Jan-03, to lugnet.cad.dev)
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