Re: 0.95-pre1 bug with Arc connectors.
- From: "Rob McDonald" <robm asdl gatech edu>
- To: "discussions about usage and development of dia" <dia-list gnome org>
- Subject: Re: 0.95-pre1 bug with Arc connectors.
- Date: Wed, 15 Feb 2006 16:51:44 -0500
On 0.95-pre1 Windows, arc connections sometimes vanish. This behaves
somewhat like a problem with a trig function. Maybe a classic atan vs.
atan2 issue. Basically, when you grab the control point and try to
how curved an arc is, for some ranges of arc, the line disappears. This
be worked around by switching the starting and ending points. Then, the
point of dissappearance is reversed...
Are these accurate steps to reproduce what you see:
Make a new diagram
Turn on snap-to-grid
Draw an arc between two adjacent grid points
Move the arc midpoint back and forth -- on one side it disappears, on
the other it's there.
I can reproduce the problem in that manner.
However, snap-to-grid doesn't matter for me. I just tested it without snap
The arc doesn't need to go between two adjacent grid points, I just picked
two arbitrary separated points.
If the arc is vertical, it appears to happen crisply based on which 'side'
it is on. However, if the arc end points are at arbitrary points, the arc
vanishing seems to be a bit more complex. However, it is very easy for me
to reproduce. You'll know it when you see it.
It appears to be somewhat related to one or the other of the endpoints going
vertical, but not absolutely so.
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