QCAD Bugtracker

  • Status Assigned
  • Percent Complete
  • Task Type Bug Report
  • Category QCAD (main)
  • Assigned To
  • Operating System All
  • Severity Very Low
  • Priority Very Low
  • Reported Version Development
  • Due in Version Undecided
  • Due Date Undecided
  • Votes 1
    • CVH (29.01.2021)
  • Private
Attached to Project: QCAD Bugtracker
Opened by CVH - 13.01.2021
Last edited by Andrew - 13.01.2021

FS#2176 - Modify > Break out Manual: relevance of order of click points for polylines

QCAD Professional
Windows 7; Win installer 32 bit
Version: (
Internet: QCAD.org
Build Date: Dec 16 2020
Revision: e06f230
Qt Version: 5.13.2
Architecture: i386
Compiler: Unknown

Forum Topic: https://qcad.org/rsforum/viewtopic.php?t=7988
File included.
I have no intention to make 48 separate reports.


Andrew commented on 13.01.2021 08:58

Thanks for your report.

Note about

Draw > Polyline > Delete Segments between Two Nodes [OB]

From the reference manual:

"After the segments are deleted, the two limiting nodes are connected by a straight line segment so the polyline is still one continuous sequence of line segments."

I will change the title of this tool to "Delete Nodes between Two Nodes" which seems more appropriate.

Andrew commented on 13.01.2021 09:04

In the context of

Modify > Break out Segment [D2]

the entire 'piece' of the polyline is broken out that is limited by other entities or a self-intersection. A node is not a self-intersection.

Andrew commented on 13.01.2021 09:08

Modify > Break out Manual [B2]

The order of the clicked breaking points is relevant in relationship with the polyline direction. This could be improved but needs more research into cases in which this behaviour might be required.

CVH commented on 13.01.2021 09:32

OB = intended behavior
OB remains different for last & second last node of a closed poly.

D2 = intended behavior

B2: Please investigate what is in the red clouds.
Also remark the 3 verticals in B2+keep in the upper trials.


CVH commented on 13.01.2021 10:02

"I will change the title of this tool to "Delete Nodes between Two Nodes" which seems more appropriate."

"segments" =about the same as "nodes".
Disambiguate "delete" with "remove".
The open space between the dots is confusing too.
Usually red = new in QCAD Icons. (Except where it is not)


Andrew commented on 13.01.2021 10:09
"segments" =about the same as "nodes".

A segment is the line or arc between two nodes. Nodes are the points between two segments or at the start / end of the polyline. If two consecutive nodes are chosen for the tool, the segment between them is not removed, since there are no nodes between them.

Disambiguate "delete" with "remove".


CVH commented on 13.01.2021 10:31

Sorry my bad ...
"node" =about the same as "vertex".

Then "replace" if even better.

Replacing multiple segments between two non-consecutive nodes replaces it by one single connecting segment.
Replacing a single segment between two consecutive nodes replaces it by an identical segment.



Available keyboard shortcuts


Task Details

Task Editing