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Point on nurbs plane

  1. Jul 8, 2009 #1
    Just had a simple question. but jus wanted to know if it had a simple answer...
    Is there any way to know if a given point lies on a nurbs surface .????

    Thanks in advance
     
  2. jcsd
  3. Jul 8, 2009 #2

    mathman

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    Yes, but it might require a bit of work. A nurbs surface consists of a collection of patches, each of which has a rational function description. You need to check if the point satisfies the description for any patch, taking into account the patch limits.
     
  4. Jul 9, 2009 #3
    How is this done actually? Sorry I am not too well versed so can you please explain

    Regards
     
  5. Jul 9, 2009 #4

    mathman

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    To help you I need to know precisely your understanding of how a nurbs surface is represented. In other words what is the form of the equations describing the surface.

    I suggest you look up nurbs (via google or bing) to get some idea.
     
    Last edited: Jul 9, 2009
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