Instance Radius = 0 in Sketched Profiles

[Meomostrom]

Hi Everyone,

Just wondering if anyone has an idea about how to go about doing this. I'm trying to make a family that has a instance Radius parameter for a fillet. This can be a beam or a generic or any other family, the idea is that I can easily change the radius on the object on the fly. It usually works pretty well, but there will be some cases where I don't actually want a radius on there, and Revit will call it out as an error if I enter in 0. Any thoughts on how to achieve this? I could create an similar no fillet family, to swap out, but I would rather not clutter up the list.

Sorry if this has been answered before, I'm a noob and my Google-Fu has failed me

[Meomostrom]

Just adding a test family to show what I'm trying to say

[Steve_Stafford]

Something can't be nothing, at least as far as Revit is concerned. In your case you are trying to eliminate a fillet arc by turning two adjacent lines into a 90 degree corner by eliminating the arc between them...something into nothing. If you really must be able to show either condition within the same family then you need to provide separate geometry that can continue to exist in either circumstance but use the Visible parameter to control whether it can be seen. So you need a IF statement that turns off the visibility of the corner with fillet when a user enters zero radius and turns on geometry that shows the corner without a radius. Reverse the logic and visibility when it isn't zero.

[Meomostrom]

Oh cool, thanks Steve for turning me onto that visibility thing, I've been reading up on it. Is it possible to make that into an Instance parameter? Are there downsides to using an Instance parameter?

[Steve_Stafford]

Downside? No, unless the reason the fillet needs to hide is based on a specific type(s) in the family.