[Ether]

Originally Posted by thinker&planner

I'll try to find the algorithm and put it here soon.

Here's a common way to do it:

Forward = (Y_left + Y_right) / 2

RotateCW = (Y_left - Y_right) / 2

Then feed the Forward and RotateCW values into the Y and Rotation inputs, respectively, to the MecanumDrive_Cartesian method¹ in WPILib (or LabVIEW). Use a joystick X axis or something else for the X (strafe) input.

¹void RobotDrive::MecanumDrive_Cartesian(float x, float y, float rotation, float gyroAngle)