[PD] [hid] resolution

[Hans-Christoph Steiner]

There are a lot of different resolutions going on here, so I'll try  
to outline them.

- The spatial resolution of each event report is determined by the  
device itself.  For example, I've seen joysticks axes have spatial  
resolutions of 20-85, 0-127, 0-255, and 0-4096.

- The time interval resolution is also set by the device and mostly  
the OS respects that.  Usually it is set to 10ms, which is plenty  
fast for most applications

- [hid] has a settable poll time.  [hid] polls the OS to get the  
events.  It defaults to 5ms, IIRC, and can be changed.  But there is  
really little reason to change this, and this functionality is being  
removed from [hidio].

The xorg settings won't affect [hid] at all, it gets the data  
directly from the kernel driver.  The xorg data has been processed  
and converted into something that makes sense to control a mouse  
pointer on the screen.  [hid] gives you just the raw data.

.hc


On Jun 26, 2007, at 12:16 AM, danja wrote:

> Hi there,
> I'm wondering about [hid] resolution, is [poll( something that has  
> to do
> with it? In the installation i'm busy with few mice are often moved  
> over
> a long distance (~1m) and often rather quick. I notice that after some
> certain movement speed the response goes very low. Of course this  
> has to
> do with the resolution of the mouse itself, but after few comparisons
> with movements using driver of Xorg I suspect [hid] get's less DPI  
> (CPI).
> Can it be that Xorg mouse driver has presets for different kinds of  
> mice
> and it enables often available hi-res mode (logitech e.g. has a
> xorg.conf 'Option "Resolution" "1200"'), when [hid] uses 'default'
> 400dpi for any sort of mouse?
>
> Any idea how to improve mouse response speed will be very much  
> appreciated,
> thanks,
> Danja
>
> _______________________________________________
> PD-list at iem.at mailing list
> UNSUBSCRIBE and account-management -> http://lists.puredata.info/ 
> listinfo/pd-list




------------------------------------------------------------------------ 
----

All mankind is of one author, and is one volume; when one man dies,  
one chapter is not torn out of the book, but translated into a better  
language; and every chapter must be so translated.... -John Donne