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Math Help - Help: move point relative to movement of 3 points

  1. #1
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    Help: move point relative to movement of 3 points

    Hi. I don't know if this is the right forum, but I need help quick with a problem.

    Let's say you have 3 points in 3D-space. p1, p2, p3.
    They make up a plane. Then you have another 3D point, p4, relative to this plane. p4 can be placed anywhere, outside or inside the plane.

    Then, the 3 points making up the plane moves to q1, q2, q3. I want to calculate q4. That is, p4 moving relative to the 3 points and the plane.

    The angle should be maintained relatively. It's ok if the distance is scaled if the distance between the 3 points are scaled somehow.

    How do I calculate this?

    PLEASE HELP!
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  2. #2
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    Joined
    Apr 2014
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    Sweden
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    Re: Help: move point relative to movement of 3 points

    Ok let's make it simpler: Just maintain all the distances to the 3 points and put the forth point on the same side of the plane relative to the planes normal.
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