create plane in 3D and

This is a discussion on create plane in 3D and within the Tech Board forums, part of the Community Boards category; Hi , I have severel Point (XYZ) and would like to do the following: 1) Pick out three points randomly ...

  1. #1
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    create plane in 3D and

    Hi ,
    I have severel Point (XYZ) and would like to do the following:

    1) Pick out three points randomly and create a plane.

    2) in a further step I would like to check if the remainig points are on the plane or not.

    Is there a function or a library which I can use to create a plane using 3 points and check the distance of the remaining points to the created plane????


    Has anybody an idea??

    Thanks a lot.

    Michi

  2. #2
    Registered User valaris's Avatar
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    For real life distances I believe the only, or best way to do it is to just use straight mathematics. As far as creating the plane and checking it, opengl or directX can do this.

  3. #3
    Ugly C Lover audinue's Avatar
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    Check this out: http://www.swiftless.com/tutorials/o...pengltuts.html

    Simple, easy, just from the basic.

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    Hi,
    thanks for your reply.
    But I don't want to display the a plane. I`m just interested in the equation of the plane(defined by 3 Points) and the distances of the remaining points.

    Isn't there a function which can do that???

    Thanks

    Michi

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    Ugly C Lover audinue's Avatar
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    Sorry, I think by visualizing it would be much easier

  6. #6
    and the Hat of Guessing tabstop's Avatar
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    Quote Originally Posted by michi7 View Post
    Hi,
    thanks for your reply.
    But I don't want to display the a plane. I`m just interested in the equation of the plane(defined by 3 Points) and the distances of the remaining points.

    Isn't there a function which can do that???

    Thanks

    Michi
    There will be, once you get done writing it. The mathematics is pretty straightforward, you just need to decide how you're going to store your plane.

  7. #7
    Super Moderator VirtualAce's Avatar
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    The math for this is simple:

    p dot n = d
    ax + by + cz + d = 0

    x,y,z = (0,1,2)

    a(0) + b(1) + c(2) + d = 0

    I'll let you figure out the rest.

    Moved to Tech board for lack of a better place to put it.
    Last edited by VirtualAce; 07-22-2008 at 05:36 PM.

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