关于js陀螺仪的理解分析

if (window.DeviceOrientationEvent) {
 window.addEventListener("deviceorientation", function(event) {
 // alpha: 围绕垂直手机屏幕的轴转动的旋转角度
 var rotateDegrees = event.alpha;
 // gamma: 围绕平行充电口的轴转动的旋转角度
 var leftToRight = event.gamma;
 // beta: 围绕平行音量键的轴转动的旋转角度
 var frontToBack = event.beta;

 handleOrientationEvent(frontToBack, leftToRight, rotateDegrees);
 }, true);
}

var handleOrientationEvent = function(frontToBack, leftToRight, rotateDegrees) {
 // 弹奏一曲夏威夷吉他
};