An accelerometer measures a phone’s linear acceleration: how quickly it moves in a particular direction. In immersive interfaces, its readings help track head movement. section 15.2
It works alongside a gyroscope and magnetometer. Sensor fusion combines their measurements to estimate how the user’s head moves through the real world and update a 3D scene. section 15.2
Phone-based virtual reality
Place a phone in a simple headset and look around. The accelerometer contributes movement information while the gyroscope measures rotation and the magnetometer supplies compass direction, enabling head-controlled viewing. section 15.2
