topic Re: inches / inches = inconsistent units in Revit Architecture Forum

inches / inches = inconsistent units

kgatzke — Wed, 08 Apr 2020 19:26:37 GMT

I want to enter a height value from standard pitch notation like 1/4" for roofs, etc. and get back an angle value to slope part of a family. I get the right angle if I put in 'atan(12/.5)' but everything I try to do to replace .5 with a parameter based on pitch results in some kind of units error.

Re: inches / inches = inconsistent units

kgatzke — Wed, 08 Apr 2020 19:29:47 GMT

Nevermind, I see what I did wrong. "Angle" was created as length.

Re: inches / inches = inconsistent units

kgatzke — Wed, 08 Apr 2020 19:34:10 GMT

Nope, still getting an error. It calculated the angle correctly and then give me this...

Re: inches / inches = inconsistent units

rodrigo.bezerra — Wed, 08 Apr 2020 20:53:01 GMT

Since Revit works with distinct kind of parameters (such as angles, integers, area, length), the outcome of an formula must be exactly what a parameter expects to be.
Ex. 1 meter x 1 meter = 1 sq meter. So, if the result of my formula is an area, my parameter must be an area parameter.

"But I want the value, not the meaning of it". Well, then you have to add to your formula a math way to solve it. Ex: (1 meter x 1 meter)/1 meter = 1

This is my guide for formula issues.

Re: inches / inches = inconsistent units

barthbradley — Wed, 08 Apr 2020 23:19:31 GMT

You have another FAMILY TYPE that is erroring out. Not the one showing in your screenshot.

1/2" tapered - 2" thick

Re: inches / inches = inconsistent units

kgatzke — Thu, 09 Apr 2020 12:40:30 GMT

@barthbradley wrote:
You have another FAMILY TYPE that is erroring out. Not the one showing in your screenshot.

1/2" tapered - 2" thick

Which was probably set to 0 by default resulting in a divide by zero. Problem was solved however by modifying a similar where everything worked. No angles were used in that one. The pitch was created by the difference between two reference planes and a boring ratio formula, all units in length. Thanks.