topic Re: associated dimension to center point in Documentation

associated dimension to center point

John Weaver — Mon, 22 May 2023 21:55:57 GMT

Is there a way to make dimensions to a center point of a line associative rather than static?

I am using 19 on Mac

Re: associated dimension to center point

Barry Kelly — Sat, 10 Sep 2016 02:47:50 GMT

Not ideal but split the line in 2 so it is an end point rather than a mid-point.
Or replace it with a polyline with a node in the middle.
Of course this 'mid-point' will not move if you stretch the end of the line which is one reason why it is not ideal.

Are hotspots associative? (I don't have Archicad open at the moment.
If so at least then you can move the hotspot to the centre of the line if you need to stretch it.

Barry.

Re: associated dimension to center point

alemanda — Sat, 10 Sep 2016 07:19:11 GMT

I think John Weaver would like to have an associative link to the mid point of a line ... so that you stretch the line and the dimension keeps attached to the new mid point ... Right?
I'm not aware of such as function ... but it would be useful...

Re: associated dimension to center point

John Weaver — Sun, 11 Sep 2016 20:25:23 GMT

Alemanda I wold like the associative link to the center point for the stretching of lines as well as just moving lines where the hot spot or splitting lines would be ok, but not happy about the extra steps. Archicad used to have associative center points but recently changed to static center points.

Re: associated dimension to center point

Barry Kelly — Mon, 12 Sep 2016 01:38:08 GMT

John wrote:
Archicad used to have associative center points but recently changed to static center points.

I just checked (I didn't have Archicad with me before).
The centre point is associative up to version 17.
From 18 onward it is not.
I have no idea why this would have to have changed.

Barry.

Re: associated dimension to center point

Laszlo Nagy — Mon, 12 Sep 2016 12:01:35 GMT

Barry, you are right, this capability was present in ARCHICAD 17, and then it was lost in versions since.
I will report this to GRAPHISOFT.

Re: associated dimension to center point

John Weaver — Mon, 12 Sep 2016 20:11:17 GMT

Thank you for checking on this. It is really frustrating for those of us who have been using Archicad for a long time (v4.5) when these things disappear.

Re: associated dimension to center point

Katalin Borszeki — Tue, 20 Sep 2016 10:47:46 GMT

Hi All,
This feature has been removed in ARCHICAD 18 because of a design decision. There was no special reason why only the line and only it’s middle point should be associative for dimensions. In projects it’s not a realistic scenario to dimension an object's middle point. Let us know if questions remain, k

Re: associated dimension to center point

John Weaver — Wed, 21 Sep 2016 14:29:43 GMT

Katalin, I understand what you are saying, but have to disagree a little. I do dimension to the middle of lines and circles since to do good quality working drawings there is some 2d drafting that needs to be done on Archicad drawings. It would be nice to have center points associative and not static.

Re: associated dimension to center point

Erwin Edel — Wed, 21 Sep 2016 14:54:29 GMT

I use hotspots for this, as Barry was suggesting as well I think. At least the dimension string isn't static that way.

Or an actual perpendicular line segment to symbolise the mid-axis.

Re: associated dimension to center point

John Weaver — Wed, 21 Sep 2016 15:42:04 GMT

the problem with the hot spot is that when you stretch the line the hot spot is not associated with the center so you have to move it to the new center. It is just frustrating that with such an automated program we have to come up with manual work arounds for something so simple and that the program had up until a couple of years ago.

Re: associated dimension to center point

Anonymous — Thu, 22 Sep 2016 14:01:29 GMT

Only an idea:
Make an OBJECT of 2 lines in similar length and direction with 3 fix-points.
There is the midpoint, you can change PEN & LINETYPE, if you STRETCH midpoint will move, measure will follow, you can LABEL the ID...
From my point it is better to have an object with a midpoint I can trust for measuring than a “real” line with need to check midpoint manually.
Only disadvantage: ROTATION.
(myself never measured a midpoint of a line)
If you are a bit fit in GDL, add HOTLINE2 in the automatic script of AC.
If you are a bit more fit you can eliminate the disadvantage of rotation by using midpoint for 0,0,0 of the object and make dynamic HoSpos at the end corresponding among each other.
Look at selfGDL.com!

Here is the 2d-schript:

!!! Thanks for learning at www.selfGDL.com 🙂))) greets to JS & FB
!!! copy following in 2D-script
!!! At DETAILS-chapter (1st) : OBJECT-TYPE is "DRAWING-SYMBOL"
!!! At PARAMETER-chapter (2nd from top): make NEW paramater "c" as lenght-type and "d" as length-type

cnt = 1
HOTSPOT2 0,0,cnt : cnt=cnt+1

! Vertikale Richtung
HOTSPOT2 d, 0, cnt ,c,1+128 : cnt=cnt+1
HOTSPOT2 d, c, cnt ,c,2 : cnt=cnt+1
HOTSPOT2 d,-1, cnt ,c,3 : cnt=cnt+1
! Horizontale Richtung
HOTSPOT2 0,c, cnt ,d,1+128 : cnt=cnt+1
HOTSPOT2 d,c, cnt ,d,2 : cnt=cnt+1
HOTSPOT2 -1,c, cnt ,d,3 : cnt=cnt+1

! Vertikale Richtung
HOTSPOT2 -d, 0, cnt ,c,1+128 : cnt=cnt+1
HOTSPOT2 -d, -c,cnt ,c,2 : cnt=cnt+1
HOTSPOT2 -d,1, cnt ,c,3 : cnt=cnt+1
! Horizontale Richtung
HOTSPOT2 0,-c, cnt ,d,1+128 : cnt=cnt+1
HOTSPOT2 -d,-c,cnt ,d,2 : cnt=cnt+1
HOTSPOT2 1,-c, cnt ,d,3 : cnt=cnt+1

LINE2 -d,-c,d,c
HOTLINE2 -d,-c,d,c
END:

!