structure expression

[CADmgrMike]

I would like to make a structure label that shows the offset if it is greater than 0, but doesn't if it is a 0 offset.

I can't figure out how to remove the offset if is is 0.

Thanks.

[Jay_B]

Hi Mike,

One way to do so is to create an expression which makes the text height very tiny so it doesn't show up when plotted.

Expression used

IF({Structure Offset}<0.001,0.00001,0.12/12)

Which is used for text height value for text component "Structure Offset" within the structure label style.

Tutorial drawing with a very crude but working example attached.(see purple structure labels).

[Jay_B]

I realized after posting the example expression provided will also exclude any left or negative offsets.

The expression would need to be revised to allow for both >0.001 and <-0.001 to do what your after.

[Joe-Bouza]

Another way: set the expression to be -1 if false, and in the expression composer select hide negative values. We  do this on our structure tables to discern between leaching basins and other structures.

[CADmgrMike]

Jay,

I see how you accomplished it, but it doesn't work when the label is dragged.

Looking at the dragged state tab, the "text height" doesn't allow you to use the expression.

That's a bummer. The labels are almost always dragged somewhere.

[CADmgrMike]

Joe,

Can you post an example?

I'm just getting into creating expressions. don't have a good handle on it yet.

Thanks.

[Joe-Bouza]

Sure Mike

this is an expression that looks at the structure floor thickness to determine "what" type of structure it is looking at and lables accordingly

IF({Floor Thickness}=0.5,-1,IF({Floor Thickness}=3.0,{Insertion Rim Elevation}-2.67,IF({Floor Thickness}=5.5,{Insertion Rim Elevation}-5.5,-1)))

the dialog shows how to set negative values in the lable style

[CADmgrMike]

Joe,

I think I see how this expression works, but in my case wouldn't the -1 remove the offset value for all structures on the left side of an alignment?

That side is considered a negative offset.

[Joe-Bouza]

then take the other route:

if(offset=0,-1,<textheight>, no? 🙂

[Jay_B]

Mike,

Pretty sure it's doable, but what needs to happen AFAIK, is have the < 0.001 & > -0.001 all in same expression.

Had it close to working but haven't had any more time to look at it.

[CADmgrMike]

On the Layout tab, each individual component has a "text height" setting, but on the dragged state tab, all components are lumped into one "text height" setting.

I got your original expression to work by changing it to IF {structure offset}=0........

It would show the offset for both left and right side of the alignment, but the dragged state changes everything because then it's reading the text height from the Dragged State tab and not the Layout tab.

[Joe-Bouza]

That is disheratening to hear.

If you could just label the structure ID in plan and use a table you'l be golden. Perhaps you could work a x,y offset ito the style so you don't have to drag it?

[Jay_B]

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mikepo wrote:

I got your original expression to work by changing it to IF {structure offset}=0........

It would show the offset for both left and right side of the alignment, but the dragged state changes everything because then it's reading the text height from the Dragged State tab and not the Layout tab.

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Hi Mike,

If I use you're simplified expression (kudos to you for simplifying), it seems to work ok in the dragged state.

IF({Structure Offset}=0,0.00001,0.12/12)

Unless I'm missing something, if Display is set to "As Composed" instead of "Stacked Text" on dragged state tab, then

the text height options are greyed out & seems to read the Layout tab text height value.

Not sure if the "As composed" option works in your case?

See attached.

[CADmgrMike]

Yes, we're getting closer.

I think I might be able to get the "As Composed" to work.

It does create an extra step if you want to drag the label to the left instead of the right.

You have to move the leader vertex.

See attached pic for end result.

Thanks for all your help.

[Bill_Myron]

Joe-Bouza had the right idea, was just missing one step.

This expression will work for what you want to do. Even as stacked text.

Because you show the offset as Left or Right and not the actual + or -, all you need to the Absolute value of the offset. This will make your offsets all positive and if there is no offset, -1.

IF({Structure Offset}=0,-1,ABS({Structure Offset}))

Make sure to hide negative values.

[CADmgrMike]

I'm not getting the 0.0 offset to go away using your expression, and it also makes the other offset text very large.

Using "hide negative values" removes the left offset. I'm using "drop negative sign" and that works.

[Joe-Bouza]

Thanks Bill

I could see what I missed, but it worked perfect once the ABS was added

[Joe-Bouza]

Mike
use this expression in tha actual component for offset not the text height. keep the the text height the printed height you need. works perfect with stacked text - no need to monkey aroung with the leader

[CADmgrMike]

Works perfect!

Then I had to go and complicate it.

We need to see brackets, offset side, a T, and add the apostrophe for the foot sign. (see attached pic)

Thanks for all your help.

I have to dig into this and educate myself.

[Jay_B]

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@CADmgrMike wrote:

We need to see brackets, offset side, a T, and add the apostrophe for the foot sign. (see attached pic)

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Mike, the LT / RT abbreviations are read from Drawing Settings > Abbreviations Tab.