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An expression for this figure

  1. Dec 19, 2012 #1
    http://img138.imageshack.us/img138/7113/conewithflattip.png [Broken]

    Help needed, I need an expression of the figure in the picture, it is like a conic but the tip is not a point but a short 1D segment (it s not a truncated conic), I accept anything ;-) skewed Conics, Sperical Harmonics approx, cubic surface..... any suggestion?
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Dec 19, 2012 #2

    jedishrfu

    Staff: Mentor

    ellipseconic and for the object an ellipsecone (I thought first ellipsone but that's already a word for winds that move in elliptical paths)

    alternatively you could use ovalconic and ovalcone

    or lineconic and linecone

    ** (I didn't know if you were try to name something new or wanted the correct mathematical name. My suggestions are inventions only)
     
    Last edited: Dec 19, 2012
  4. Dec 19, 2012 #3
    How about elliptical wedge? Or do you need to model it? You take the formula for two ellipses and interpolate between them. Set the width of the upper one to zero. Something like this:

    [tex]X(t)=(a_1 (1-z/c) + a_2(z/c) )\cos(t) [/tex]
    [tex]Y(t)=(b(1-z/c)\sin(t) [/tex]
     
    Last edited: Dec 19, 2012
  5. Dec 19, 2012 #4

    jedishrfu

    Staff: Mentor

    a wedgeonic or wedgeone
     
  6. Dec 20, 2012 #5
    How about a cowbell?
     
  7. Dec 20, 2012 #6

    jedishrfu

    Staff: Mentor

    Y'all must be from Texas.
     
  8. Dec 20, 2012 #7
    Yes, I do live in Texas
     
  9. Dec 20, 2012 #8

    jedishrfu

    Staff: Mentor

    Me too.
     
  10. Dec 20, 2012 #9
    Well, howdy neighbor!
     
  11. Dec 20, 2012 #10

    jedishrfu

    Staff: Mentor

    Howdy!
     
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