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Date:	Thu, 24 Nov 2016 08:38:29 +0100 (CET)
X-X-Sender:	igor2 AT igor2priv
To:	geda-user AT delorie DOT com
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From:	gedau AT igor2 DOT repo DOT hu
Subject:	[geda-user] [pcb] bugreport: rubberband; [pcb-rnd] reminder: Saturday test
	sprint
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Hi all,

I managed to separate the rubber band code and moved it all in an optional
feature plugin in pcb-rnd. After that, we started to test whether I
broke something in the cleanup and Evan found an interesting bug that
affects mainline too.

REMINDER:

we are having a test sprint on Saturday, to hunt & fix bugs like the below 
one.

Event summary: http://repo.hu/cgi-bin/pcb-rnd-people.cgi?event=tsprint3

Join us on IRC (any time): http://repo.hu/projects/pcb-rnd/irc.html

BUGREPORT:

It is easy to reproduce with the attached minimal board. Grab the top 45 
degree short line and move it (rubber band is on). Make sure you grab the 
line, not its endpoints - this can be done by clicking near the middle of 
the 45 degree edge of the line (zoom in!). Also make sure the line is not 
selected.

Once the line segment is grabbed, there's no xor-drawn attached-lines and 
when the operation ends, the endpoints of the attached lines are thrown 2x 
further than necessary.

Repeat the same with the bottom 45 degree line segment and it won't happen 
there.

The only difference is that the top line is short while the bottom line is 
long. Because of a bug in rubber_callback() this results in finding 
and adding the same objects twice; this cancels in the xor-draw and 
multiplies the endpoint moves.

The fix is commited in pcb-rnd r5265.

Regards,

Igor2
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