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Need help with projection

  1. Nov 24, 2007 #1
    Ok so I am doing an astronomical simulation. But that isn't the important part.

    I have two points defined in terms of spherical coordinates: an observatory, and the satellite it is tracking. They are labelled O and S respectively in the (bad) diagram at the below link (clicky). Converting them to 3D cartesian points is trivial.

    The cylinder seen is the field of view of the telescope (yes, I know it wouldn't really be a cylinder but work with me) The field of view is fixed. The observatory is the center point of the bottom 'cap' of the cylinder. I need to know what the point will appear as in the view as if there were a giant eyeball looking through the bottom cap. The output should be, of course, a circle.

    So how do I go about projecting a point in this cylinder?

    Last edited by a moderator: Apr 23, 2017
  2. jcsd
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