node-hid VS neko

Node: node-hid.

I don't know if this would be any use to you. When working on some node projects I would use https://github.com/node-hid/node-hid to interface non-standard usb components. Maybe there is something there to help you, I would be really surprised if gamecube controllers runs a usb protocol native, I was always led to believe it was a proprietary serial connection - unlike an original xbox controller which used a USB protocol but with a unique plug.

That's from https://github.com/node-hid/node-hid

Its not currently available on github but will be soon. The current app I am building is a combo of javascript and typescript using electron js for making the actual app. I'm using the node-hid library for handling receiving and sending those messages. https://github.com/node-hid/node-hid

I think it's relatively straightforward? Each mouse should be generating input events, it's "just" a matter of "Mouse1 += (100x, 200y)", "Mouse2 += (-3x, -5y)" and keeping track of a virtual cursor/pointer position that the "real" cursor should jump to depending on which mouse is generating input events.

...and for the use cases, having an extended desktop (eg: airplay to HDTV mounted on the wall) and being able to have your primary "desktop" mouse 100% glued to your main screen, but a secondary "click the play next video button on the tv" mouse is genius!

I'm pretty sure if somebody were sufficiently innovative they could paint a bullseye/target around the virtual cursors with some sort of minor performance penalty (a-la: xNeko - https://github.com/crgimenes/neko).