Forums >> Revit Systems >> Technical Support >> Parameter Formulas and "Grips"

setver62

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Is it possible to have a parameter with a formula AND "grips"? Or is this just a wishlist item? If so, what is the process?

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setver62

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WWHub

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I don't understand how that would work.  You can have grips (instance based parameter) or you can use a formula using other parameters.

Maybe a better explanation of what you want would help.

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setver62

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Just want to know if you can have a formula and still get grips for that parameter. I am trying to create a parameter that uses a formula when inserted, or other parts are modified, but it can also be modified with grips. The grip modification would also feed back to the formula for final modification.

I have a face-based family (required for my needs) that needs an extrusion that stretches in 2 inch increments. If there is a way to either embed a line-based array family in the family I have, or a way for the face-based family to have this feature, that would eliminate the need for a formula.

Thanks in advance...

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setver62

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TKennedy

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Joined: Wed, Oct 7, 2009
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It sounds like you need to do exactly what I did with a shelving unit family. I ended up using two parameters and two reference planes. The first parameter would be Length_Adjust, and would be tied to a the first ref plane set as a weak reference. This will give you a set of grips you can adjust in the plan. The second parameter would be Length_Actual, and would be tied to the second ref plane set as not a reference. The family geometry is tied to that ref plane. The Length_Actual parameter contains your formula, and reads Length_Adjust.

Hopefully that's clear enough for now, I don't have time to post a family or formulas.

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setver62

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Thanks, I'll try that.

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setver62

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