When doing a presentation or demo with a projector, it would be very usefulto be able to click on a feature you are illuminating with a laser pointer.Maybe the spot could flare to indicate the mouse click. You would needtargets at the corners to calibrate before the presentation, and some sortof sensing of 3-D motion. It might be tricky to work out. Of course if thescreen itself were sensitive to the pointer, it would be easy.

Idea of Gabor Kiss

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