topic Adding Formula in Text Override for Dimension in AutoCAD Forum

Adding Formula in Text Override for Dimension

Anonymous — Thu, 04 Feb 2016 21:31:15 GMT

Guys,

Is it possible to add a formula in the text override for a dimension?

In a project, I have to add dimenions to a roof plan then add square inch in each dimension using text override.

Hopefully you can help with that.

Regards,

Justin

Re: Adding Formula in Text Override for Dimension

Kent1Cooper — Thu, 04 Feb 2016 21:41:40 GMT

@Anonymous wrote:

....

Is it possible to add a formula in the text override for a dimension?

In a project, I have to add dimenions to a roof plan then add square inch in each dimension using text override.

....

Yes, something like that can be done, but explain a little more.... There's no Dimension type that shows area [they're all linear or one-directional in one way or another, or angular ], but square inches are a matter of area, so what does it mean to "add square inch in each dimension"? For a rectangular area, the square inches of it would be the product of two Dimensions along perpendicular edges, so which do you add square inches to? Or am I misunderstanding?

Re: Adding Formula in Text Override for Dimension

scot-65 — Thu, 04 Feb 2016 23:14:19 GMT

As Kent said - Dimensions are linear and you want to add a square inch?
Do you really mean to not only show foot-inch but inches as well?
If "Yes", look into all the "Alternate Units" settings.
If simply adding an "override" look into adding as a "suffix" (DIMPOST) instead.

???

Re: Adding Formula in Text Override for Dimension

Anonymous — Fri, 05 Feb 2016 00:19:45 GMT

What I had to do is add dimensions around edges of the roof then manually add a specific format in the Text Override in the property of each dimension.

I.E. The dimension on a edge of the roof is 10'-8". The square inch of that dimension is figured out by this formula: (10 x 12 + 8) x 9.7 / 12 = 103.47. Once I get that number, I manually insert it in the Text Override property of the dimension by writing that specific format: <>\P103.47 SQ IN OF SOFFIT VENTS.

Now I am wondering if I could insert a formula in the Suffix in the Dimstyle so it'll automatically show the square inch in the dimension once I add it to edges of the roof.

Makes sense?

Justin

P.S. The 9.7 is a number we used to determine how many square inch of a specific soffit vent we will need.

Re: Adding Formula in Text Override for Dimension

Kent1Cooper — Fri, 05 Feb 2016 12:04:27 GMT

@Anonymous wrote:
....
I.E. The dimension on a edge of the roof is 10'-8". The square inch of that dimension is figured out by this formula: (10 x 12 + 8) x 9.7 / 12 = 103.47. Once I get that number, I manually insert it in the Text Override property of the dimension by writing that specific format: <>\P103.47 SQ IN OF SOFFIT VENTS.

Now I am wondering if I could insert a formula in the Suffix in the Dimstyle ....

In a quick trial, Dimension Style suffixes don't seem to be able to handle AutoLisp formulas [though there may be some other way]. But this works for me:

(setq obj (vlax-ename->vla-object YourDimensionEntityName)

(vla-put-TextOverride obj (strcat "<>\\P" (rtos (/ (* 9.7 (vla-get-Measurement obj)) 12) 2 2) " SQ IN OF SOFFIT VENTS"))

Bear in mind that if the dimensions are to the outer edges of a roof, a hip roof under which the soffiting turns the corner will give you areas that overlap, so the total will be more than actually needed [unless you dimension the outer edge on one side of the corner and the back edge of the soffiting on the other side].