Say you have an iOS device, oriented sideways. The functions, Input.acceleration.x Input.acceleration.y and Input.acceleration.z are registering as 0,-1,0 respectively. I need to detect if the user rotates the device horizontally. By horizontal I mean if you were holding the device level and were to spin around in a chair. How would I do this?
Perhaps you mean to use the hardware gyroscope. If the device is technically stationary but the user seated is spinning, the gyroscope will pick up these values.
Unity Input.gyro Documentation which returns type of Gyroscope