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Thread: Door plan swing line breaking - help please.

  1. #1
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    Door plan swing line breaking - help please.

    Good Morning guys,
    I have to admit that is one of those revit thing I have "just wing-it" in the past.
    I would like to have a good understanding of why the 2d arc that represents a plan swing of a door does not remain constrained and breaks once it get to a certain point. Once it breaks there is no going back.

    I am attaching the rfa and some screen shots to get some help please.
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  2. #2
    Senior Member DavidLarson's Avatar
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    I used two reference lines to constrain the swing. One on each side. It works as long as the angle is greater than .1% or less than 179.9%

  3. #3
    Member
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    I'd really love if a reference line could just anchor at one end and be done with it.

    I do something along this...
    http://therevitcomplex.blogspot.com/...e-angluar.html

  4. #4
    Senior Member DavidLarson's Avatar
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    They can. Place it, move it and lock it.

  5. #5
    Mr. Revit OpEd
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    When the swing element is a nested family I find it usually works fine in the host family. It is in the family editor where it will fail when elements land directly on a reference plane. I believe automatic sketch dimensions attempt to intervene in those instances. When I build a flexible component for nesting I don't always worry if it doesn't flex through every permutation internally. I test it in the host family. I've rarely found one that breaks there the same way it breaks on its own. Similar situation with arrays.

    When the rotation angle is zero (an acute angle) then the arc fails because its length becomes zero too...something can't become nothing.

  6. #6
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    Thank you everyone. I found later that day, that the simplest fix was to use the angle arc that revit automatically draws and turn it into a parameter. I have tried all ref places, lines methods to no avail.

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