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A How can I find the collision time of 2 ellipsoids that rotate

  1. May 22, 2017 #1
    I have 2 ellipsoids:

    Ax^2/a^2+Ay^2/b^2+Az^2/c^2=1; (*a,b,c>0 constants*)
    Bx^2/a^2+By^2/b^2+Bz^2/c^2=1;
    Ellipsoid A rotates around axis [wax;way;waz] (unit vector) with an infinite speed;
    Ellipsoid B rotates around axis [wbx;wby;wbz] (unit vector) with an infinite speed;
    [Dx;Dy;Dz] is the vector from ellipsoid A center to ellipsoid B center;
    The velocity of ellipsoid A center is [VAx;VAy;VAz];
    The velocity of ellipsoid B center is [VBx;VBy;VBz];

    How can I find the collision time?
     
  2. jcsd
  3. May 23, 2017 #2

    Stephen Tashi

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    Science Advisor

    You should clarify the question.

    How does it make sense to ask for a collision "time" when things are happening at "infinite" speed? Are you seeking "the fraction of time" that two figures would have some intersection?
     
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