The Tech Help You Need

["jlinkels" <jlinkels-3YmcnsWQSOBBDgjK7y7TUQ@xxxxxxxxxxxxxxxx>]

I found this (maybe downright stupid) method for selecting an object 
which is overlapped by other objects on the same layer.

I select the object which I hope is the correct object. If it is the 
wrong object, I delete it by pressing <DEL>. The I select the next 
hopefully right object. If it is not the right object I delete it 
again. This way I continue until I finally select the really wanted 
object, which became possible because all other objects are deleted.

Once the correct object is selected, I undo all deletions with
CTRL-Z. 
To my great joy, deletions ARE undone, but selections ARE NOT. So I 
end up with the corrected object selected, and all other objects back 
again.

This works especially great when trying to select a closed contour
for 
hatching, which can be extremely difficult with overlapping lines.
For 
selection of the first line during trimming it also works great. For 
selecting the second entity during trimming ... well... not yet.

jlinkels


--- In qcad-user-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, list+qcad-user@xxxx, 
Chaiken@xxxx 
wrote:
> 
> > looney_Saint wrote:
> >> I need to trim more than two objects. I have a circle and two 
> >> horizontal lines (Parallel). The two lines intersect on the 
> >> circumference of the circle. I want to make the trimming such 
that the 
> >> circumference line between the two parallel line are trimmed off.
> >> 
> >> Somehow I manged to do it out of luck. Most of the time it does 
not 
> >> work. Sometimes (rarely) when I select the circle with one of
the 
> >> line, the circle become dotted (not solid line) until I select 
the 
> >> other parallel line and circle again. Only then it works. 
> 
> I have had the same problem.    
> 
> andrew@xxxx (Andrew Mustun) writes:
> > It's probably easier to divide (Modify - Divide) the circle at
> > the intersection points and then delete the segment in between.
> 
> The problem is that in a drawing with many objects, it's hard to
> select the right line segment with the selection tool after 
dividing.
> At the intersection of two polygons, line segments may overlap.  I
> suppose that if you somehow know the coordinates of the objects you
> have created by dividing, you can select them from the command line?
> Is there a way to generate a list of the line segments and arcs in
> order to select them from the command line?
> 
> -- 
> Alison Chaiken                "From:" address above is valid.
> (650) 236-2231 [daytime]      http://www.wsrcc.com/alison/
> Predators fail often; prey fail only once. -- Tom Evslin




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