根据HTML5陀螺仪完成ofo主页双眼挪动实际效果的示

2021-02-23 20:30 jianzhan

近期用ofo小黄车App的情况下,发现之前正下方扫1扫变为了1个双眼动的小黄人,感觉蛮成心思的,这里用HTML5仿1下实际效果。

ofo双眼实际效果

实际效果剖析

从实际效果中可以看出,是应用陀螺仪恶性事件完成的。

这里先看来1下HTML5中陀螺仪恶性事件的1些定义。

陀螺仪恶性事件为deviceorientation,这里关键获得恶性事件中的alpha,beta,gamma

aplha

行動设备水平置放时,绕 Z 轴转动的角度,标值为 0 度到 360 度。

beta

行動设备水平置放时,绕 X 轴转动的角度,标值为 ⑴80 度到 180 度。

gamma

行動设备水平置放时,绕 Z 轴转动的角度,标值为 ⑼0 度到 90 度。

这里,只必须用到beta和gamma。

将apk解压,获得双眼素材:

编码完成

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF⑻">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
  <title>Document</title>
  <style>
    #box{
      position: relative;
      width: 300px;
      margin: 0 auto;
    }

    #face{
      background-image: url(images/face.png);
      background-size: cover;
      width: 300px;
      height: 300px;
      position: absolute;
    }

    #eyeLeft{
      background-image: url(images/eye.png);
      background-size: cover;
      width: 40px;
      height: 40px;
      position: absolute;
      top: 90px;
      left: 100px;
    }

    #eyeRight{
      background-image: url(images/eye.png);
      background-size: cover;
      width: 40px;
      height: 40px;
      position: absolute;
      top: 90px;
      left: 190px;
    }

    #glass{
      background-image: url(images/glass.png);
      background-size: cover;
      width: 300px;
      height: 300px;
      position: absolute;
    }
  </style>
</head>
<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 = '访问器不适用DeviceOrientationEvent';
}
</script>
</body>
</html>

最后实际效果

 

 

以上便是本文的所有內容,期待对大伙儿的学习培训有一定的协助,也期待大伙儿多多适用脚本制作之家。