A mouse wheel starts @ 0 & increases by 1 for every unit of scroll up/decreases by 1 for every unit of scroll down.

A mouse axis is 0 when the arrow is @ the top or left of the screen; When the arrow is @ the bottom right of the screen, the mouse y axis is the height of the screen & the mouse x axis is the width of the screen (in pixels). Note that in game, the “arrow” stays near the middle of the screen.

Trigger axis always return 0 (verify).