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FS#602 - QCad 3 : Intersection between ellipses

Attached to Project: QCAD
Opened by Garcia (plgarcia) - Wednesday, 23 May 2012, 21:24 GMT+2
Last edited by Andrew (andrew) - Thursday, 31 May 2012, 10:12 GMT+2
Task Type Bug Report
Category QCAD (main)
Status Closed
Assigned To Andrew (andrew)
Operating System Windows (All)
Severity Low
Priority Normal
Reported Version 3 RC5
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


Intersection between ellipses are not all detected.

This makes difficult difficult to make the projection as the example I give, where part of ellipses are to be removed betwwen intersection ponts.

This task depends upon

Closed by  Andrew (andrew)
Thursday, 31 May 2012, 10:12 GMT+2
Reason for closing:  Fixed
Additional comments about closing:  r21626
Comment by Andrew (andrew) - Wednesday, 23 May 2012, 21:27 GMT+2

Could you please attach the DXF or DWG file for testing or send it to us via e-mail? Thanks.

Comment by -- (clive) - Monday, 28 May 2012, 16:32 GMT+2

I tested this and drew something similar. I found that I needed to explode the ellipses twice in order to break them back down into arcs.I was then able to clean up the drawing with the modify tools!
I guess being able to snap to/detect elliptical 'arc' intersections before exploding them would indeed speed up the 'clean-up' process

Comment by Garcia (plgarcia) - Tuesday, 29 May 2012, 21:57 GMT+2

I made some further tests.

If you draw an ellipse and copy and paste this ellipse the intersections are not found. If you re-size the ellipse moving and handle, then the intersections are found again.

My original drawing was done projecting 2 circles, so all ellipses are identical (direction and size). If you draw separately two ellipses exactly the same size and direction, then the intersections are not found.

If you re-size one of the ellipse or draw 2 different ellipses then intersections are found.

To summarize, intersection between two identical ellipses are not found.