Using evsieve to use Wiimote as a mouse: Is it possible? about evsieve HOT 1 OPEN

It is possible to use d as the value in an event map. The variable d represents the difference between the current value of the event, and the value that the event had the last time it was emitted by its input device. This is handy for turning absolute events into relative events:

evsieve --input /dev/input/by-id/your-wiimote grab \
        --map abs:hat0x rel:x:d \
        --map abs:hat0y rel:y:d \
        --output

So, if for example an abs:hat0x:300 were to be followed up by a abs:hat0x:310 event, the latter event will be mapped to rel:x:10, which will be interpreted as moving your mouse ten arbitrary units to the right.

You can also add a factor like rel:x:0.5d to map events to half of the difference between the current value of the event and its previous value. (Though you might run into rounding issues since event values always need to be an integer value, see issue #42.)

Maybe you can use this to turn your Wiimote into a somewhat functional mouse?

from evsieve.