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Next step is to gauge the amount of blood underneath the fingernail to tell the amount of pressure being applied.

I had an idea years ago using a webcam and the 'blood under fingernail' to have a trackpadless-trackpad (i.e. same as this project but on your table).

Maybe some time-rich person will fork it and do so.

Or track your eye/ eye lens

Haha, acid.

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