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From: "Luis de Arquer (ldearquer AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Mon, 6 Mar 2017 23:58:15 +0100
Message-ID: <CAGqyy=bYZO8zpxMb90K2Ka3LjGG8SEEBvKZMnBDdLke4i=JEyg@mail.gmail.com>
Subject: Re: [geda-user] Rubberband move keeping lines direction
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2017-03-06 22:08 GMT+01:00, Nicklas Karlsson
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]
<geda-user AT delorie DOT com>:
>
> If it work for any angle just a little bit of grid snapping to compensate
> for rounding errors should solve it for the special but very common case of
> 45/90 angles.
>

I thought about rounding errors too, but in the end, floating point
(double really) works pretty well, so 45/90 tracks keep their
orientation perfectly, to the 100th of mil (i.e, same dx and dy module
for 45deg tracks). The problem was that, snapping to grid for any
angle is perhaps impossible -think of a neighbour track with a 100/1
slope, it would distort the cursor movement so much. Also, if both
neighbour lines have cumbersome slopes, it could even be impossible to
do a grid aligned movement at all.

But yeah, 45/90 could definitely benefit from grid alignment!

Luis