Trim

[spectric]

Hi all

Is there a method to trim everything on one side of a line ? So you have a drawing with a row of regular shapes but wish to cut half away, I can do it by working on every part but I thought that maybe there is a better solution, draw a line through where you want to cut and then select the half you wish to keep.

I am using the latest version of Qcad 3.27.6.0 on a windows 10 platform.

Thanks Roy

[Husky]

Hi Roy,

Hi all

Is there a method to trim everything on one side of a line ?

Yes, there are a few different methods which can be used depending on the case . Can you provide an example drawing with explanation what needs to be done? Thanks.

[CVH]

Hi,

Something similar as in this post?

[Solved] Bulk Break out

Hello, everyone! I’m looking for a command / scripted way to apply ‘Break out segment’ to a group of lines. Here’s a helping picture. [bulkBreakout.png] What I’m trying to achieve is getting the same result as if I was applying (D, 2) to all those lines, using the vertical line as guiding intersection. I’d like to apply this to the whole group, avoiding clicking on each line. Actually, the best case would be removing everything on the left of that vertical line, but I could do that using sele…

Feature request here:

FS#1983 : Trim All or Bulk Break out

The workaround with Clip to Rectangle (CLR) only works when your limiting line is horizontal or vertical.
And there is a bug: FS#2347 : Modify / Clip to rectangle issue
‘Clip2Boundary’ would be a solution with an angled limiting line or with curved shapes.

A recent solution aka workaround is using Break out Segment (D2) in Line Selection Mode. (See Options Toolbar)

Remind that in some rare cases with some trimming tools QCAD might still return (near) zero-length results.

Regards,
CVH

[spectric]

Hi

I have attached a drawing that I wish to cut in half on the horizontal plane. I have been looking at the breakout tools but with limited success.

I am also looking at the clip to rectangle because my limiting line is horizontal.

thanks Roy
Test trim.dxf (111 KB)

[CVH]

Roy,
Clip to Rectangle (CLR) with option ‘Cut at Area Boundary’ would do the trick … Without the bug!

In your case I would select all (TA) then CLR and then indicate a point e.g. (-400,100) and the second one (400,0).
That would cut all full circles that cross the X-axis in two, the other parts don’t really cross.
One could not pre-select the problematic Arc’s with R=69.

Because it is symmetric …
And CLR with option ‘Clip to Area’ is functional for both the upper part or the lower part …
One can simply complete the result by mirroring a copy over the X-axis.

Regards,
CVH

[spectric]

Hi CVH

Well that method of using clip to rectangle and then clip to area works, what threw me initially was having to give the opposite points of a rectangle and not just a straight cut line.

thanks Roy

[CVH]

what threw me initially was having to give the opposite points of a rectangle and not just a straight cut line.

It’s all in the name … ‘Clip to Rectangle’ … A straight cut line is not considered being a special case of a rectangle.
Break out Segment (D2) in Line Selection Mode … Here one has to define a line that crosses the entities of interest.

Regards,
CVH

[ryancousins]

I always forget about the Line Selection Mode. I’ve seen a very similar tool in another CAD program back in the 90’s where that functionality was built into the TRIM/EXTEND tool rather than break out segment. This allowed a series of extensions to be drawn to a arbitrary line all at once as well.

[CVH]

I’ve seen a very similar tool in another CAD program back in the 90’s where that functionality was built into the TRIM/EXTEND tool

Indeed, see feature request mentioned above.
That is also the reason that I don’t consider the ‘Line Selection Mode’ as a solution for FS1983.
One only selects by a line and one does not trim/extend to that line.

But the ways how QCAD functions is totally different too.
For now I have no workable route to implement something like it.

Regards,
CVH

[ryancousins]

Indeed, see feature request mentioned above.

I didn’t follow that link before. But hey, what do you know, that’s the same program I was thinking about! CadKey7 for MS-DOS