cvs commit: src/usr.sbin/moused Makefile moused.8 moused.c

Philip Paeps philip at
Mon Mar 12 09:22:52 UTC 2007

On 2007-03-12 08:06:08 (+0000), Ceri Davies <ceri at> wrote:
> On Sun, Mar 11, 2007 at 08:02:26PM +0000, Philip Paeps wrote:
> > Add dynamic acceleration to moused(8).  This introduces a '-A' flag to
> > control the acceleration algorithm.  It can be used together with the '-a'
> > flag for regular acceleration.
> > | +The optional
> > | +.Ar offset
> > | +value specifies the distance at which the acceleration
> > | +begins.  The default is 1.0, which means that the
> > | +acceleration is applied to movements larger than one unit.
> Could we get a definition of "unit" in?  I'm reading "pixel" but that
> doesn't seem right.

The "units" of pointing devices are a Great Dark Secret, only shared with
people who play with them.  Mouse distance is measured in "mickeys".  The
definition of a mickey depends on a number of things.

Usually (at least in my experience), without acceleration, a mickey is the
number of pixels moved by the pointer per inch moved by the mouse.  Add
acceleration into the equation, and things get weird really quickly.

No, I'm not joking. :-o

 - Philip

Philip Paeps                                       Void where prohibited
philip at

  hundred-and-one symptoms of being an internet addict:
  142. You dream about creating the world's greatest web site.

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