Hi, I’ve build a FTIR touch screen and experimenting with touchlib’s demo apps. My FTIR construction is rather ‘sloppy’ but it works (not great though). As I’m not that great with c++ programming, I turn to vvvv in the hope of being able to start building multi-touch app quicker. As of now, I could use the ‘VideoIn’, ‘Contour’ and a ‘Renderer’ node to detect and show blobs. Are there any ready-made demos in vvvv that anyone could direct me to for further learning on my part for the objective of building multi-touch apps. (my objective is skew toward apps for education). Thanks.

One of our forum users has actually posted a TUIO to vvvv patch. You better check it out.

http://nuigroup.com/forums/viewreply/14666/

And for a simple example just connect the outputs of the X and Y to a transform of a quad (also make the scale a bit smaller) and then you’ll have a simple “blocks where i put my fingers” patch. Have fun with it.

Thanks, the TUIO to vvvv patch is meant to be used with touchlib? Sorry I’m a newbie to all these terms. And yes, I did try out something like that about robot texture file that are link to the X,Y of Contours to get its touch position and the output of the texture is link to quad to a renderer and they appear where the finger touches. Nice, but beyond that I’m really scratching my head....

Yes, touchlib can send its output through TUIO which can be read with vvvv.
Check the tutorials on vvvv.org