I'm trying to create a family for a gable end vent and I'm running into problems with getting a void to subtract from an array of rotated slats so I can achieve the tapered sides one sees with this kind of element. Does anyone have any tips on how to do this? I've done a few families with voids in the past but something about the combination of an array and a void applied to the array appears to be problematic. I've attached the file that represents my best effort so far. Any help is greatly appreciated.
Mike
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Few things. Do you need all that detail in your model?
My first approach would be to just use a material to fake the look or maybe to consider or some model lines. One of the first "rules" of Revit is not to model with too much detail. Especially arrays and voids are contributors to performance loss of your model
Alternatively, do you need to have it parametrized? Otherwise I would consider to make it just as a fixed model without any complicated arrays and voids
Louis
Please mention Revit version, especially when uploading Revit files.
As an example of the last, a quick example of a modeled approach. Parameter to vary the height and width.
Just used some reference planes with sweeps. The amount of slats is fixed. However it will take just a little bit of work to each time modify the family to suit your needs
Attached the family in Revit 2018 (no access to older versions at the moment)
Louis
Please mention Revit version, especially when uploading Revit files.
My question - is this something that you would use repeatedly?
Regarding the family - some suggestions -
Use a window template. Modify the sketch of the opening cut. Model the trim, frame etc. Nest and array your louvers. Abandon the voids. Posted a family with the basics in place - trick it out the way you want. This family should do all that you want.
You can cut an array with a void. There are only fewl limitations.
-You will have to start with the maximum amount of instances in the array.
When you increase the elements in the array, new objects are generated. The void will not cut those new objects
As in the screenshot Qty of array was increased from 5 to 6. You will see that last element is not cut.
So solution would be to start with maximum amount (of slats) and then decrease the elements in the array when needed (makes family potentially heavy)
Second thing is that void will only cut if the elements in the array are in the same family as the void. So a nested element cut by an a void in the host will not work. In your case you would have to create the slats and the void both in the host.
I would say I would not take the trouble as it will bring a lot of overhead to the project without adding much information (simple detail will be more helpful)
However if that is what you agreed with your client than you should try something
Louis
Please mention Revit version, especially when uploading Revit files.
If you need different sizes and don't want to deal with arraying, void, and formula, then you could model each instance as curtain wall then you have a more flexible control over the overall shape/size and the spacing of the louver.
Hi @Anonymous
How are you doing?
I just wanted to follow up here, any progress on this issue?
Please mark any posts that help with "Accept as Solution" and thanks!
Viveka CD
Designated Specialist - AEC, AR/VR Research
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Hi. These comments were helpful. I wound up making a family that was easily broken BUT did the job for the project I was working in. Ultimately I was able to make a family that could be flexed in its width and height to adapt to changes in the roof pitch or the client's desire for a more diminutive or more gracious vent. If I changed the wall thickness I will have to go in and edit the family. Just very hard to get the array to behave. Candidly, I think the ability to manipulate arrays better would be met with a lot of user enthusiasm. Still have to try out all the soft shadow input you helped initiate on my other post. Thank you Viveka_CD.
Hi there @Anonymous
Glad to hear that you found the responses helpful, interesting to see different ideas!! ![]()
Yes, it would be great to have additional tools for array manipulation.
Btw Thanks for sharing your project PDF.
and sure let us know your updates on soft shadows! Please submit your ideas to the idea station too.
Regards,
Viveka CD
Designated Specialist - AEC, AR/VR Research
Autodesk playlists| Find Recommended Hardware| System requirements for Revit products| Contact Autodesk Support| Autodesk Virtual Agent| Browse Revit Ideas| Revit Tips/Tricks| Revit Help| Revit Books
@Anonymous wrote:
Hi. These comments were helpful. I wound up making a family that was easily broken BUT did the job for the project I was working in. Ultimately I was able to make a family that could be flexed in its width and height to adapt to changes in the roof pitch or the client's desire for a more diminutive or more gracious vent. If I changed the wall thickness I will have to go in and edit the family. Just very hard to get the array to behave. Candidly, I think the ability to manipulate arrays better would be met with a lot of user enthusiasm. Still have to try out all the soft shadow input you helped initiate on my other post. Thank you Viveka_CD.
I'm glad to hear you figured out a solution that at least worked for now.
RE. the client's desire... it's certainly desirable to keep the client happy, but... you are aware that there may be a calculated minimum free air area required by code, right?
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