Forums >> Revit Building >> Technical Support >> Yes/No Corner Miter

esahnow

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Joined: Tue, Oct 7, 2008
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Using Revit 2012

Precast wall panel that I would like to add a yes/no corner miter for when the panels meet at a 90 degree corner. I've attached a common panel template that we use here in the office. I've never done a yes/no formula successfully so I come to the experts. 

Are there best practices for yes/no formulas?

Thanks for the help!

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Eric Sahnow

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TKennedy

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Joined: Wed, Oct 7, 2009
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Unfortunately, there is no way to control the visibility of a void, or you could add a couple voids to the edges. I think you are going to need three extrusions and a Y/N parameter for each (four if you need to be able to have a miter at both ends at the same time). One extrusion with no miter, and a no miter parameter. One extrusion with a miter on the left edge, and a left miter parameter. Same for the right edge. I would put the L & R parameters under Graphics, and the no miter parameter under Other. That will keep LR at the top of the properties list. I would also put a formula in the no miter parameter so you don't have to control it manually. The formula would be 'not(or(Left, Right))'.

To add a parameter to control visibility, select an element and click the small button next to the visibility check box in the element's properties. You will then be able to select a Y/N parameter, or create a new one.

I don't know exactly how you place these, but you may also be able to use just one miter param, and use a flip control to mirror the panel.

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esahnow

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Wow, thanks TK. Looks like I've got my work cut out for me. Currently they are placed as curtain wall panels. Not sure if I can 'flip' panels like that. I'll look into it.

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Eric Sahnow

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TKennedy

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Once you get started you'll get it figured out, it's not as complex as it seems. I threw a quick sample together so you have something to look at. The parameters are instance, but they could be type, it doesn't matter. You'll notice it doesn't work well with a miter at both ends, that can be fixed if needed. Basically it would require another extrusion and parameter, with a formula similar to the 'no miter' parameter.

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dgcad

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Joined: Thu, Mar 17, 2005
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If I understand the situatiion correctly I made a video a while back to demonstarte a work around on this.

Have a look at this post and video.

REVIT Void Geometry Trick

http://revitrocks.blogspot.com/2009/11/revit-void-geometry-trick.html

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FULL 'DOWNLOAD ACCESS' to all 850+ CADclips videos for only $150

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jterrell

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Joined: Thu, Mar 9, 2006
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One way to control the visibility of a void is with a dimension parameter. If the object is not supposed to be cut, let the dimension move the void beyond the solid geometry in the model. If it needs to be cut, the dimension should move the void into a position that will cut the elements.

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esahnow

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I really think this dimension parameter is going to work. A little time consuming to apply this to all of the different panel types that are located at the corners of the precast building (we have 4 height elevations) but this will really make the drawings look good.

Thanks for all the help!

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Eric Sahnow

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dgcad

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Just watch the video.

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esahnow

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I did DG, it was exactly what I needed. Thanks!

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Eric Sahnow

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