<body>
<div id="box">
<div id="face"></div>
<div id="eyeLeft"></div>
<div id="eyeRight"></div>
<div id="glass"></div>
<div id="log"></div>
</div>
<script>
'use strict';
/*
* author: 王乐平
* date:2017.7.17
*/
var eyeLeftPosition = {
start: [70, 78],
end: [100, 110]};
var eyeRightPosition = {
start: [150, 78],
end: [190, 110]};
var eyeLeftCenterPosition = {
x: (eyeLeftPosition.end[0] - eyeLeftPosition.start[0]) / 2 + eyeLeftPosition.start[0],
y: (eyeLeftPosition.end[1] - eyeLeftPosition.start[1]) / 2 + eyeLeftPosition.start[1]};
var eyeRightCenterPosition = {
x: (eyeRightPosition.end[0] - eyeRightPosition.start[0]) / 2 + eyeRightPosition.start[0],
y: (eyeRightPosition.end[1] - eyeRightPosition.start[1]) / 2 + eyeRightPosition.start[1]};
var r = 20;
var eyeLeft = document.querySelector('#eyeLeft');
var eyeRight = document.querySelector('#eyeRight');
if (window.DeviceOrientationEvent) {
window.addEventListener('deviceorientation', function (event) {
let {alpha, beta, gamma} = event;
eyeLeft.style.left = eyeLeftCenterPosition.x + gamma / 90 * r + 'px';
eyeRight.style.left = eyeRightCenterPosition.x + gamma / 90 * r + 'px';
eyeLeft.style.top = eyeRight.style.top
= eyeLeftCenterPosition.y + beta / 180 * r + 'px';
eyeRight.style.transform = eyeLeft.style.transform
= eyeRight.style.WebkitTransform
= eyeLeft.style.WebkitTransform
= 'rotate(' + beta + 'deg)';
}, false);
} else {
document.querySelector('body').innerHTML = '浏览器不支持DeviceOrientationEvent';
}
</script>
</body>
</html>
最终效果
