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Forums >> Revit Building >> Technical Support >> Tricky Formula Question
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Joined: Sat, Apr 3, 2010
144 Posts
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I am creating a Detail Component that is a circle repeated along a line, with parametric spacing. For example, if I draw a 4' line, with 1/2" spacing, the circles run the full length at 1/2" intervals. If I change the spacing to 3", I still want them to run the full length, but the overall number to diminish so that they are now spread out across the same 4' line, but at 3" intervals.
I have almost got this working using circles grouped to detail lines, and then an array. It is ALMOST great, but I can't figure out the right formula for the number of circles so that they always draw the maximum number of circles that will fit in the length that I draw. If, for example, I do (Length - Spacing) / Spacing + 1 then the number will round down and not always draw an extra one even though there is space. If I do (Length / Spacing) + 1 then it will sometimes draw an extra hole BEYOND the length I have drawn.
If this makes any sense, what formula would I use?
Thanks.
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Joined: Wed, Oct 7, 2009
654 Posts
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I've run into the same problem, and it seems to come from Revit rounding integer parameters. I have a family that arrays table legs, and checks to see if Revit is rounding down when it's not supposed to (or rather when I don't want it to). I have attached the family along with a .txt file that explains how the parameters work.
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Joined: Wed, Mar 2, 2011
106 Posts
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I suggest you send the file you already started in order to study the case
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I sat down and thought for a while about it and tried (length / spacing) + .5, and that worked perfectly. Thanks for your suggestions.
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109565_Table_Legs_Formulas.txt
109565_QFFabrWorkTableLegs.rfa