topic Re: Weird Dimension Strings in Documentation

Weird Dimension Strings

Anonymous — Tue, 30 May 2023 13:12:44 GMT

Archicad 16 64 bit version.

If you notice the dimension string at the top, it has an extra 1/16th of an inch. Why is that? It should be 7'-4"....when I measure it it's 7'-4"....only when I dimension does it throw in the extra fraction.

Re: Weird Dimension Strings

Dwight — Wed, 27 Feb 2013 00:24:10 GMT

Reduce your dimension accuracy to ⅛" and see.

Re: Weird Dimension Strings

rocorona — Wed, 27 Feb 2013 07:11:32 GMT

Or increase your drawing accuracy

Re: Weird Dimension Strings

Dwight — Wed, 27 Feb 2013 07:18:20 GMT

Hahaha!

The longer i consider it, this looks like a problem measuring to the window centre.

Re: Weird Dimension Strings

rocorona — Wed, 27 Feb 2013 10:05:15 GMT

I was kind of kidding, but really, if the elements have these measures:

7'4"
11'10"31/32
11'11"31/32
7'4"2/32

the result you get, with 1/16 of accuracy, if exactly the one shown. A common rounding issue.
I'm in meters, here, and if I split a 1m line in 3 parts, the segments are measured 33cm33mm ... I never get the "full" length.

Re: Weird Dimension Strings

Steve Jepson — Wed, 27 Feb 2013 20:30:12 GMT

rocorona wrote:
Or increase your drawing accuracy

There is an other possible way to fix that when you have been as accurate as possible do draw things where hey go and you still get an inconsistent dimension chain. Set user origin to a reference node on the wall at the end of your dimension chain. The move the items you have dimensioned typing in the distance in the x or y direction. This sort of thing is usually avoided if you have your dimension settings to 1/64th to start with.

Rounding off to a a 16th, 1/8th, 1/4...what ever is a last resort and should only be used in the layout book if you ask me.

AutoCAD works to the 256th if I recall. Why ArchiCAD works only to the 64th I don't know.
The need for more accuracy in not for the sake of documentation, it is for the sake of modeling. You can avoid some graphic anomalies in renderings and such with more precisely constructed CAD models.