Model Text height offset

[Redrunner92]

I created a simple sign family. All the parameters are working as I expect them to except one: the model text is not moving up on the sign based on the "Lines of Text" parameter after I change the text style. After I make the text Bold or Italic or both via their respective Yes/No parameters, the model text remains in its same position regardless of what integer value I provide in the "Lines of Text" parameter. When I uncheck both and change the "Lines of Text" the model text once again moves around as I expect it to behave. Does anyone know why the text freezes like this when it is bold or italic?

[barthbradley]

Yeah, it keeps breaking.  Try nesting the Model Text in.  

[Redrunner92]

Nesting it is bringing up a few different problems, mainly the Center (Left/Right) ref plane isn't showing up for me to align-and-lock. I'm getting the feeling model text is one of Autodesk's neglected children. Looks like making a 1-line text object and a 2-line text object, with a visibility Y/N parameter on each, will be the simplest way to go. Thanks for the suggestion though 🙂

[barthbradley]

Add Ref. Planes to the nested Model Text Family with a "Weak Reference" or higher Priority and then reload into Host.  You'll be able to Align and Lock and snap to these RPs in the Host.  

[Redrunner92]

The ref plane showed up. Regardless, switching between one line and more lines of text is making me need two instances of model text no matter how I approach it. The center of the model text changes and breaks parameter associations when going from one to more text lines. So Y/N parameters are still the way to go. See for yourself if you want.

[ToanDN · Accepted solution]

Nest it and you can constraint it just fine.  2022 file is attached (sorry I don't have Revit 2020).

[Redrunner92]

Right, the alignment works, but I still need one instance per number of lines of text.

[ToanDN]

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@Redrunner92 wrote:

Right, the alignment works, but I still need one instance per number of lines of text.

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What do you mean?

[Redrunner92]

When changing from one line of model text to two, the center of the text changes its position, and Revit treats this as a new center plane, not the model text moving up and the center plane staying in its same location. If you open the nested model text family in the file I uploaded most recently and change from one line of model text to two, you'll see what I mean. An error will pop up saying "Constraints are not satisfied." This means the relationship of the model text to the reference plane is being severed, and this severance carries into the host/parent family. So the align-and-lock of the nested model text to the center of the parent family's extrusion rectangle is no good anymore after reloading the nested family. Thus, I need to make one instance of model text for the single-line text and another instance for the two-line text.

[ToanDN]

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@Redrunner92 wrote:

When changing from one line of model text to two, the center of the text changes its position, and Revit treats this as a new center plane, not the model text moving up and the center plane staying in its same location. If you open the nested model text family in the file I uploaded most recently and change from one line of model text to two, you'll see what I mean. An error will pop up saying "Constraints are not satisfied." This means the relationship of the model text to the reference plane is being severed, and this severance carries into the host/parent family. So the align-and-lock of the nested model text to the center of the parent family's extrusion rectangle is no good anymore after reloading the nested family. Thus, I need to make one instance of model text for the single-line text and another instance for the two-line text.

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Nope.  There is no such error with my file.

[Redrunner92]

You changed the formula and made the model text constrained to the top rather than the center--and didn't mention it. Sneaky.