[PD-dev] Re: [PD] using graphics tablet for input

[Maurizio Umberto Puxeddu]

Hi Thomas. Hi all.

	Are you using the tablet via X-Window/Xinput?

I modified [grid] so that it can parse the /dev/input/event0 messages from
a Wacom Graphire USB tablet. I'm quite happy but for the CPU usage:
reading the device with a socketreceiver (like [netrec]) is relatively
time consuming and can eat up to 4% of a PIII 800.

Any alternative approach?
Something like reading the device in a thread and polling at a
configurable rate makes sense? (I think people was talking about this in
another context in recent past).

Regards,

Maurizio Umberto Puxeddu.

On Thu, 3 Oct 2002, Thomas Grill wrote:

> Hi all,
> has anyone worked out a general scheme to use a graphics tablet for
> triggering events in the sense that one has a map sticked to its surface
> where several zones can be defined and recognized in a PD patch?
>
> I was thinking of a very general system which includes drawing the map,
> printing it and stuffing the (metafile graphics format of the) map into an
> object to get out the zones triggered by the tablet coordinates. This
> procedure shouldn't be too time-consuming to quickly sketch new setups.
> Which portable graphics format could be used for that? The only usable one
> that i know is DXF but that doesn't seem to be common apart from the CAD
> world....
>
> greetings,
> Thomas