wow, you are approaching you goal very fast
with reference to CRAFT,
does anyone have a link on how to build say a slider or x/y using a cap sensor chip like craft?
also possibly as 'inspiration' how the the TRILL BAR/SQUARE are laid out in terms of channels to get their functionality?
here is my assumption on how it might work... is this vaguely correct?
so I believe a strip of conductive material with a sensor, will tell you how far along that strip you have touched. so this gives you 'x' with one channel on the 'craft' (or similar) - this is how a ribbon pot works.
to get X/Y you form a grid of channels. and then you interpolate from this.
if you make the grid small enough, you can then 'infer' the touch size (since you assume close points are not actually individual points but the same touch)
so this gives us x/y/z for a single touch
but this will work for actually work for multi touch too. because you can different touches using the grid with certain limitations i.e. as long as you can differentiate each touch on one axis.
(iirc there is a 3 touch in a 'box' configuration limitation... but my memory is a bit sketchy in this area)
so with crafts 30 channel , the limitation is forming that grid, the closer the spacing , the higher the resolution (particularly important for touch size) ... but of course the smaller the surface area.
BUT you can chain the crafts over I2C, to get more channels ...
I guess then you become mostly limited by the data rate of I2C? (give i2c allows for 127 slaves)
(hmm, and I guess there might be a limited i2c address count on CRAFT)
is this roughly correct?