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Forums >> Revit Building >> Technical Support >> Revit family creation graphics visibility (dependent)

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Tue, Aug 11, 2009 at 2:44:36 PM | Revit family creation graphics visibility (dependent)

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gouldse


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REVIT Architectural 2010.

I'm working to create a family wall panel that is 48" wide with two metal studs located 12" from either end.  I've been able to build the model with different constraints but the one I can't seem to get to work is visibility.  I'm designing the panel from left to right and would like to have the second stud not visible if the panel length is less than 36".

Basically I want the visibility of the second stud to be dependent on the legth of the panel.

I've read quite a bit of info from this site and others but still can't seem to get it to work properly. I just can't seem to get it!

Thanks, Gouldse


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Tue, Aug 11, 2009 at 3:01:14 PM | Revit family creation graphics visibility (dependent)

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dgcad


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I'd have to test it but this would be my algorithm.

Create a yes / no parameter <second_stud_vis> to control the basic visibility of the second stud and apply that parameter to the visibility property of the stud object.

Create another 'formula based' parameter to control whether second_stud_vis should be yes or no.

 If panel_length < 36 second_stud_vis = no else yes


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Tue, Aug 11, 2009 at 3:19:03 PM | Revit family creation graphics visibility (dependent)

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gouldse


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Thanks I've watched your family creation vidoes, which are very helpful. So should this algorithm be a formula for the graphic, dimension or should it be a constraint? this is where my problem lies. (I think)

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Tue, Aug 11, 2009 at 4:18:24 PM | Revit family creation graphics visibility (dependent)

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dgcad


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Wow, what a great lesson for all readers !

 

This is actually much easier than I had anticipated because as the help menu indicates the yes / no conditional statement automatically implies the if, then, else operators making the syntax very simple.

Note: IF with Yes/No condition: =Length > 40 (Note that both the condition and the results are implied.)

 

So all you have to do is this:

1. Make a length parameter called Panel_Length and constrain the panel length to that parameter.

2. Create a yes / no parameter called second_stud_vis.  Use the formula column of this parameter and set it to =Panel_Length > 3' (this tiny statement means if Panel_Length is greater than 3 feet set this to Yes else set it to No)

3. * Then, very important last step, set the visible property of the second stud to be the parameter second_stud_vis. (In the Element Properties dialog box of the second stud for visible the far right has a little parameter button.

 

I have attached a sample panel family that has all of the above working correctly. Have a look.

 

Super lesson that can be applied in many many ways.



Edited on: Tue, Aug 11, 2009 at 11:24:49 AM

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Tue, Aug 11, 2009 at 6:20:28 PM | Revit family creation graphics visibility (dependent)

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gouldse


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I may have forgotten one point.  We're using this as a curtain wall application and that formula doesn't function the same way.  We can't seem to figure out what setting overrides the other.  When building the curtain wall we'll specify a Vertical grid pattern with a fixed distance of 4'.

Edited on: Tue, Oct 6, 2009 at 11:36:57 AM



Edited on: Tue, Oct 6, 2009 at 11:38:14 AM

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