I'm trying to move a game object when i raise/lower (Shake) my phone but I don't know how get the device's movement. I already know about Input.acceleration but that just gives me the devices rotation and I want it's actual movement.
Is this possible and how would I go about doing it?
Accelerometer reads the sum of: changes in movement (acceleration) + constant force of gravity. You can use it for directional movement in two ways:
Detect changes of gravity angle - when the device is not moving (or is moving at a constant speed) and is parallel to the ground, the accelerometer will read Earth's gravity, ie: new Vector3(0,-9.81,0). When the device is tilted (so not parallel to the ground), the vector's length will still be 9.81, but it will be rotated a bit like. new Vector3(3.03, -9.32, 0) (this example is rotation in one axis by 56 degrees (pi/10)). Using this will yield this kind of controlls: https://www.youtube.com/watch?v=3EU3ip4k0uE
Detect peaks of acceleration. When the device is still or moving with constant speed, the length of acceleration vector will be equal 9.81, when it changes/starts movement, this number will change. You can detect these changes and interpret this as one time momentary movement (like pressing an arrow).
There are alternatives not using an accelometer, for example you can detect some printed marker with Vuforia: https://www.youtube.com/watch?v=8RnlBEU5tkI - interpret the relative position to the marker as and action in a simmilar fashion as you'd detect acceleration change in #1.