Input#addMoveCallback()

Adds a callback that is fired every time the activePointer receives a DOM move event such as a mousemove or touchmove.

The callback will be sent 4 parameters:

A reference to the Phaser.Pointer object that moved,
The x position of the pointer,
The y position,
A boolean indicating if the movement was the result of a 'click' event (such as a mouse click or touch down).

It will be called every time the activePointer moves, which in a multi-touch game can be a lot of times, so this is best
to only use if you've limited input to a single pointer (i.e. mouse or touch).

The callback is added to the Phaser.Input.moveCallbacks array and should be removed with Phaser.Input.deleteMoveCallback.