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  1. #1
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    Default Get location of circle tangent to ellipse

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    Hi,

    In the Example image, the RED circle moves with its center point over the BLACK circle. Is it possible to get the location(s) where it is tangent to the GREEN ellipse?
    Don't know how to approach this...does anybody has an idea how to start?

    I have included a sample in DWG format.
    The Ellipse in the DWG is drawn with the PELLIPSE variable set to 1, but if it is easier with a genuine Ellipse it is also ok.

    GreetzzzExample.dwg
    Attached Images

  2. #2
    Forum Deity steven-g's Avatar
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    Draw an offset from the elipse and use the radius of the circle as the offset distance, where this crosses the larger circle will be the center of your smaller circle
    I've just been down graded from 2012LT to full Autocad 2017. I WANT LT BACK

  3. #3
    Quantum Mechanic Lee Mac's Avatar
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    Quick demo -

    ellipsetangent.gif
    Lee Mac ProgrammingTwitterExchange App StoreDropbox (500MB free)

    With Mathematics there is the possibility of perfect rigour, so why settle for less?

  4. #4
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    Such a simple solution

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    Lee just listed the steps for the code!

  6. #6
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    Quote Originally Posted by Grrr View Post
    Lee just listed the steps for the code!
    Might be nit picking here, but I would say that steven-g listed the steps. Lee illustrated them wonderfully tho.
    Different goal also quite often means different path...

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    Quote Originally Posted by Jef! View Post
    Might be nit picking here, but I would say that steven-g listed the steps. Lee illustrated them wonderfully tho.
    Aah, right..
    Sorry about that steven-g.

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    I guess a picture is worth a thousand words and a video is worth a million

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    Well I've always prefered, looking at the pictures of a book rather reading the text - when I just browse thru the pages quickly.

  10. #10
    Forum Deity steven-g's Avatar
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    +1
    the gif explains it in a much clearer way and makes it a lot easier for anyone who doesn't use English as their main language
    I've just been down graded from 2012LT to full Autocad 2017. I WANT LT BACK

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