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Thread: Trying to reverse engineer this family

  1. #1
    Member Darius's Avatar
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    Trying to reverse engineer this family

    The item that im most curious about is how they applied the triangle formula to the top of this family.

    there are parameters hidden in the middle extrusion of the family i believe these are part of it along with the span parameter.

    however in one formula they use a hypotenuse (doesn't that mean there is a right triangle somewhere or could this work for an isosceles triangle?)

    Just wondering if my assumptions are correct?
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    Last edited by Darius; April 29th, 2014 at 06:52 PM.

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    Moderator cellophane's Avatar
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    The right triangle exists from the top RP (Eave Height) to the center of the frame. I think there are better ways of handling the formulas but it does work. I'm also not the best at trig

    I also would have used reference lines instead of the Brace Length parameters. The geometry will take care of itself if constrained to the RL.

    different strokes I guess
    Last edited by cellophane; April 29th, 2014 at 07:07 PM.
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  3. #3
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    Alex Cunningham's Avatar
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    The constraints are going from the top of "Eave Height" to the peak based off half the width of "Span" Creating a right triangle from the center of the span to the opposite corner. His extrusion is constrained to the intersections of the reference planes at these points. Then the sweep is constrained to the edge of the extrusion. Not entirely sure why they needed the hypotenuse as a constraint. It will always be a right triangle so finding the angle of the slope and defining the height of the peak as a constraint would be the way I would of done it. To each there own.


    a = Rise * Rise or (a²)
    b = Run * Run or (b²)
    c = sqrt(c) or (c²)

    Pythagorean Theorem is (a²+b²=c²)

    To find his Hypotenuse a simpler way would be to simply to put "sqrt(Rise ^ 2 + Run ^ 2)" in the Hypotenuse parameter and get rid of "a" "b" and "c"

    Added my version of the family. I didn't re-construct the constraints though.
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    Last edited by Alex Cunningham; April 29th, 2014 at 11:55 PM.
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    Member Darius's Avatar
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    would you attached the model to more ref planes and not use hidden parameters

    (i dont like hidden parameters always seems like asking for trouble when you go back to the family later)

  5. #5
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    Quote Originally Posted by Darius View Post
    would you attached the model to more ref planes and not use hidden parameters

    (i dont like hidden parameters always seems like asking for trouble when you go back to the family later)
    I would not use hidden parameters. :thumbsups:

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