we have a sticky problem with OSC / FLOSC and our FTIR screen. OSC and sometimes FLOSC crashes after failing to de-register touch points in our Adobe Flash application. Our 100” vertical rear-projected screen is installed in a museum environment with many, many kids. It runs stable under “normal” use conditions of 1 to 3 adult users. A typical situation that seems to initialize the above problem is when multiple kids with greasy fingers interact with the screen. First, the grease spots remain registered as touch points on the screen. After that no registered touch seems to de-register anymore resulting in a screen full of “circles” indication the touch points. Finally the flash application freezes or OSC or FLOSC crashes. We theorize over possible solutions such as only allowing a maximum number of touch inputs in Flosc, but we only have the competence to handle the flash side. Has anybody experienced a similar problem and has some advice on this. Much appreciated.
Some notes regarding our setup:
- 2000 mm x 1500 mm x 8 mm acrylic with FTIR
- 3 mm rear projection material
- 570 TV-line CCD B/W camera with IF filter
- Touchlib Beta 2.0 precompiled