QCAD - 2D CAD System.

Click here for a documentation of the DokuWiki formatting syntax that can be used in reports

Please search for existing tasks (also closed ones) before opening a new task.

Please make sure that you are using the latest Version of QCAD before posting a bug (menu Help > Check for Updates)


FS#1530 - Draw > Circle > 3 Tangents: solutions not found

Attached to Project: QCAD
Opened by Christian Aigner (caigner) - Thursday, 12 January 2017, 13:25 GMT+1
Last edited by Andrew (andrew) - Wednesday, 01 February 2017, 10:31 GMT+1
Task Type Bug Report
Category QCAD (main)
Status Closed
Assigned To Andrew (andrew)
Operating System Linux (All / Other)
Severity Low
Priority Normal
Reported Version 3.16.4
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No


Given is a drawing of two concentric arcs connected at the ends. (see attached drawing Circle_from_3_Tangents_1.png)

When I try to add a circle at one end by the “Circle from 3 Tangents”-tool, it does nothing.

I also tried it with another drawing (see attached drawing Circle_from_3_Tangents_2.png) - same negative result.

I then tried drawing Circle_from_3_Tangents_3.png. Here the tool only produces outside circles and misses the inside ones.

Hope you can confirm my findings.

This task depends upon

Closed by  Andrew (andrew)
Wednesday, 01 February 2017, 10:31 GMT+1
Reason for closing:  Fixed
Additional comments about closing:  https://github.com/qcad/qcad/commit/d747 a4f4f0826d242d834b87e10cdb94f527d09d
Comment by Christian Aigner (caigner) - Tuesday, 31 January 2017, 11:00 GMT+1

I tested the new Apollonius.js and it works now for my first example, but with exampe #2 and #3 the problem still exists.