topic Re: Cannot figure out how to get wall radius for label in GDL

Cannot figure out how to get wall radius for label

Podolsky — Tue, 14 Sep 2021 07:02:05 GMT

I need to script a label, that would know radius (also coordinates of radius centre) of the wall. I looked how window knows about it - for that there is special global variable WIDO_ORIG_DIST. But wall's global variables do not have any information about it. Any ideas? Or it's just impossible?

Re: Cannot figure out how to get wall radius for label

Kristian Bursell — Sun, 11 Jul 2021 23:21:30 GMT

I have never found the answer either.
I was hoping the radial dimension tool would be a GDL object I could explore, but sadly no.
So I think there is a way to do the math from other values but I haven't had time to look into yet. You would need start, end points (and center maybe) and then a length value.
Or perhaps there is a command I just haven't found it.

Re: Cannot figure out how to get wall radius for label

Podolsky — Mon, 12 Jul 2021 08:51:05 GMT

The only once way for solving this problem I found via using label coordinates. By placing label automatically it appears always in the middle of the wall. Then I have wall start point, wall arc middle point, chord direction and length of arc. This information would be enough to get formula finding radius and centre of radius.
But the only problem here - if I'm placing label manually (not in the middle of the wall arc) it will calculate wrong radius, also if I'm modifying wall radius, length or position of the end point - it will give me wrong radius.
But there is no another possibility, probably.

Re: Cannot figure out how to get wall radius for label

Barry Kelly — Mon, 12 Jul 2021 09:33:40 GMT

The 'Moldings and Panel' wall accessory works on curved walls.
Having a quick look at the scripts, it uses 'ac_wall_radius'.

So 'ac_wall_radius' will read the radius of the wall for you if you can use that in your label.

Barry.

Re: Cannot figure out how to get wall radius for label

Podolsky — Mon, 12 Jul 2021 09:53:37 GMT

Barry wrote:
The 'Moldings and Panel' wall accessory works on curved walls.
Having a quick look at the scripts, it uses 'ac_wall_radius'.

So 'ac_wall_radius' will read the radius of the wall for you if you can use that in your label.

Barry.

No, I cannot. Wall accessory passing to the GDL object parameters values via Add-on (all information about wall geometry). There is no connection between label and Add-on. If I just set new parameter variable AC_wall_radius in label it will return me zero.

Re: Cannot figure out how to get wall radius for label

Anonymous — Mon, 12 Jul 2021 20:08:48 GMT

I noticed that WALL_POSITION[1] gives the chord length of the arc. That with WALL_DIRECTION gives us the real cord length. With this and WALL_LENGTH_A (Arc length) we can get the wall radius thru https://www.vcalc.com/wiki/vCalc/Circle+-+Chord+Length+from+Arc+Length+and+Radius.
Does this makes sense?

Re: Cannot figure out how to get wall radius for label

Podolsky — Tue, 13 Jul 2021 00:00:59 GMT

No. WALL_POSITION means wall position - coordinates x,y,z. Wall position cannot give arc chord length.

Re: Cannot figure out how to get wall radius for label

Lingwisyer — Tue, 13 Jul 2021 01:10:38 GMT

Braza wrote:
WALL_POSITION[1]

Is that a new variable in AC24/25? It is not available in AC23...

Ling.

Re: Cannot figure out how to get wall radius for label

Podolsky — Tue, 13 Jul 2021 06:39:02 GMT

Screen shot from AC17 GDL manual.
Guys, what's wrong here is happening?

Re: Cannot figure out how to get wall radius for label

Anonymous — Tue, 13 Jul 2021 09:31:12 GMT

Yes. WALL_POSITION long exists.
But I did a test with a dummy label with WALL_POSITION[1] AND [2] text2.
Noticed that the arc is always counterclockwise although the origin straight wall was from left to right.
Perhaps it is just luck. But it gives you the chord length. Though if I move the wall to the negative side of the origin it will give a different value...
Just turning some rocks.

Re: Cannot figure out how to get wall radius for label

Podolsky — Tue, 13 Jul 2021 09:47:28 GMT

I cannot comment this anymore.

Re: Cannot figure out how to get wall radius for label

Anonymous — Tue, 13 Jul 2021 18:20:56 GMT

Looks like AC25 has the solution.
New label parameter: LABEL_ASSOC_ELEM_GEOMETRY

radius_of_circle = Arc Length/Subtended Angle in Radians
r = s/θ

Does this now makes sense?

Re: Cannot figure out how to get wall radius for label

Podolsky — Tue, 13 Jul 2021 19:18:14 GMT

Now it does. I was writing on ArchiCAD 21, so didn't know about this new variable. It's actually introduced in ArchiCAD 23. Thank you a lot - this very useful information.

Re: Cannot figure out how to get wall radius for label

Anonymous — Tue, 13 Jul 2021 19:45:18 GMT

You are welcome Podolsky.

Re: Cannot figure out how to get wall radius for label

Aaron Bourgoin — Tue, 13 Jul 2021 20:34:33 GMT

Podiolsky. I sense beer is coming your way soon. I've introduced your label to a couple of teams in the office to try. I really appreciate your efforts as well as Braza's! Thank you.

Re: Cannot figure out how to get wall radius for label

Podolsky — Tue, 13 Jul 2021 22:53:42 GMT

Million of thanks. Soon I will include curve part too, as you can see - we figure it out how to make it.
Please let me know, do you need support for sections, or sections are not relevant.

Re: Cannot figure out how to get wall radius for label

Aaron Bourgoin — Tue, 13 Jul 2021 22:58:45 GMT

Hey Podolsky. Sections are less important. Plan cover the mandatory base information we need to submit. But thanks for asking.

Re: Cannot figure out how to get wall radius for label

Anonymous — Wed, 14 Jul 2021 09:13:56 GMT

Hey Aaron,
I am glad my small contribution to Podolsky label could somehow help.
It looks like a proper Fire Rating Label is coming to reality.
Cheers,

Re: Cannot figure out how to get wall radius for label

Podolsky — Wed, 14 Jul 2021 09:52:00 GMT

Yes, I think to keep a label as it is for old ArchiCAD versions, but add ArchiCAD version check, that, if version is 23 and above - to use modified script with a new global. So the object itself then still available starting from AC 21.

Re: Cannot figure out how to get wall radius for label

Dominic Wyss — Fri, 16 Jul 2021 13:14:18 GMT

Here's my quick & dirty solution for wall radius:

dict geo, p

if haskey(LABEL_ASSOC_ELEM_GEOMETRY.referenceLine2D.contour.edges[1].ArcAngle) then
	geo.has = "yes"
	geo.ang = LABEL_ASSOC_ELEM_GEOMETRY.referenceLine2D.contour.edges[1].ArcAngle
	geo.num = vardim1(LABEL_ASSOC_ELEM_GEOMETRY.referenceLine2D.contour.edges)

	p = LABEL_ASSOC_ELEM_GEOMETRY.referenceLine2D.contour
	geo.dir.x = p.edges[2].begPoint.x - p.edges[1].begPoint.x
	geo.dir.y = p.edges[2].begPoint.y - p.edges[1].begPoint.y

	geo.chord = (geo.dir.x^2 + geo.dir.y^2)^0.5
	geo.rad = geo.chord/(2*sin(geo.ang/2))


else
	geo.has = "no"
	geo.ang = 0
	geo.num = 0
	geo.rad = 0

endif


hotspot2 0,0

if geo.num > 2 then
	text2 0,0, "poly"

else
	text2 0,0, "ang= " + str("%", geo.ang) + "\nrad= " + str("%", geo.rad)

endif

works for AC23 and younger