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Thread: 2.5D Generic Model Family and View Range

  1. #1
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    2.5D Generic Model Family and View Range

    Hi All,

    I've been battling with this for hours and just can't figure it out...

    There's 2 generic model families - each one has a 2.5D family (detail items and symbolic lines) placed on the ref level plane.

    When loaded into a project, the families behave totally differently.


    One shows fine, whether the view range bottom limit is raised for not, the other one 'disappears' when the bottom limit is raised.

    The families seem to be built in exactly the same way, so I have no idea why they are behaving differently.


    If anyone fancies taking a look at the attached file to give this puzzle a go, it would be a great help!

    Many thanks in advance
    Attached Files Attached Files

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    Forum Co-Founder Twiceroadsfool's Avatar
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    I opened it to take a look, but immediately closed it after getting a headache.

    Respectfully, i cant figure out why you would work this way. It gimps half the intelligence of Revit. a bunch of Detail Items, in a Family, thats in a Family, thats in a Project.... Versus, just Modeled Items in a Group in a Project?

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    Quote Originally Posted by Twiceroadsfool View Post
    I opened it to take a look, but immediately closed it after getting a headache.

    Respectfully, i cant figure out why you would work this way. It gimps half the intelligence of Revit. a bunch of Detail Items, in a Family, thats in a Family, thats in a Project.... Versus, just Modeled Items in a Group in a Project?
    Hi, I've stripped the families of further 3D elements because they aren't causing the problem, and for ip issues.

    The nesting is as follows:
    2D detail items nested into a generic model family
    Generic 2.5D family nested into a fully 3D version of elements.

    They wanted to be able to control the '2D' and 3D visibility of the family, and this made sense. There are also many various versions of this layout etc... so for cataloging this made sense also.


    I found a bodge for the one that isn't working by drawing an invisible line vertically in the 2.5D family. But still confused why the other family works without anything like this...
    Last edited by Grumple; April 5th, 2019 at 09:05 PM.

  4. #4
    Junior Member scourdx's Avatar
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    Normally if you are using any 2d detail component into model family, I would add a parameter to elevation and draw an invisible model line. This way your model will behave the way you want it. If you don't do this, it won't behave the way you wanted. This is why you get some family shows up while another time it won't show correctly.
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    Grumple likes this.

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    Forum Co-Founder Twiceroadsfool's Avatar
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    Quote Originally Posted by Grumple View Post
    Hi, I've stripped the families of further 3D elements because they aren't causing the problem, and for ip issues.

    The nesting is as follows:
    2D detail items nested into a generic model family
    Generic 2.5D family nested into a fully 3D version of elements.

    They wanted to be able to control the '2D' and 3D visibility of the family, and this made sense. There are also many various versions of this layout etc... so for cataloging this made sense also.


    I found a bodge for the one that isn't working by drawing an invisible line vertically in the 2.5D family. But still confused why the other family works without anything like this...
    Right. I wasnt misunderstanding what was done, technically. What im misunderstanding is: Why do any of that?

    Just model the 3d geometry, and show it. (and not in a family, yuck).

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    Quote Originally Posted by Twiceroadsfool View Post
    Right. I wasnt misunderstanding what was done, technically. What im misunderstanding is: Why do any of that?

    Just model the 3d geometry, and show it. (and not in a family, yuck).

    Because this is a modular family that will be used on multiple projects.

    Personally, I find families far more manageable and useful than grouped elements (especially grouped 3D and 2D elements).

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    Quote Originally Posted by scourdx View Post
    Normally if you are using any 2d detail component into model family, I would add a parameter to elevation and draw an invisible model line. This way your model will behave the way you want it. If you don't do this, it won't behave the way you wanted. This is why you get some family shows up while another time it won't show correctly.
    Thanks for this.

    That did seem to 'fix' this family, but I'm still not sure why one worked (without any 'vertical' elements) and the other didn't...

  8. #8
    Junior Member scourdx's Avatar
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    I always want to know why it misbehave. Revit 2d component rely on the bring to front and back. Placing them in the model family lose that control. So you are at the mercy of the model object behavior. This is why adding the 3d invisible model line trick gives that control back.

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