i want to buy a multitouch display like ACER T230H for presentations.
now s my question if it will be possible to get the (x/y)coordinates of the single touch points via HID ?
if anybody has experiences with this, and got one of these monitors working in pd id be glad for some advices, what to buy and wich drivers to get.
thanks...

I'm not so sure about getting the coordinates of the touch points. Why do you want the coordinates? What's your OS?

The only thing I can tell you is that a single touch device is interpreted by the OS as a mouse...and that's hella useful. I don't know anything about multi-touch. Perhaps the OS is okay with simply interpreting it as "two mice." I think the problem is a question of it knowing that these are two distinct events - it needs extra info about one point being held down as the "other" is active. I just performed a test on my single-touch device - if I hold down one point on the screen and then tap another it will jump to the new point and stay there until it detects movement someplace else (as with a synaptics laptop touchpad). That said, as far as the computer is concerned, it registered both points, so if you really do only need the raw data, you might be able to get by with a single-touch. Say, you have different active spaces on the screen - like 4 Grid objects, one in each corner. You could touch them practically simultaneously and you would have 4 distinct coordinate outputs - with a single-touch device. You would run into a problem if you wanted both inputs to move simultaneously and you need continuous output, even then you may be able to come up with some kind of interpolation.

You can see my recent giddy post about my single-touch device using the Grid object - I hope that Acer has all of the drivers and lists compatibility online.

If you don't need multi-touch get an Elo, they are really cheap! As a matter of fact, you could probably get two or three Elo's for the same price, and THEN you have multi-touch.

• J.P.

Oh hey, I just went to look for something that would give me a bang when I tap the screen and found two objects that will give you the coordinate info you need: [linuxevent] and [linuxmouse]

errrr... [MouseState] is multi-platform but probably can't handle two mouse events.

hey ponzo, thanks for your reply.
i need multitouch, or to be more specific DUALTOUCH like its supported in windows7.
i alredy made a 3d navigation patch useing 2 mice to emulate this, see this ->

i want to sniff somehow the datastream coming from the monitor, wich is over usb for the standalone ones.
but im not sure about the laptops, wich is where i want to use this also.
i was thinking about [comport] but as i dont have any MTscreen or laptop i cant try it