完整的背景图片鼠标移动范围

时间：2018-08-12 17:43:05

标签： javascript jquery css3

我有一个小脚本，可以在鼠标移动时倾斜背景图像。我尝试了3张不同的图像，无论它们的大小如何，图像移动时都会出现白色间隙。

背景图像跟随鼠标没有问题。只是显示白色间隙，我尝试将图像设置为无用。

$(function() {
  // Init
  var container = document.getElementById("container"),
    inner = document.getElementById("inner");
  // Mouse
  var mouse = {
    _x: 0,
    _y: 0,
    x: 0,
    y: 0,
    updatePosition: function(event) {
      var e = event || window.event;
      this.x = e.clientX - this._x;
      this.y = (e.clientY - this._y) * -1;
    },
    setOrigin: function(e) {
      this._x = e.offsetLeft + Math.floor(e.offsetWidth / 2);
      this._y = e.offsetTop + Math.floor(e.offsetHeight / 2);
    },
    show: function() {
      return "(" + this.x + ", " + this.y + ")";
    }
  };
  // Track the mouse position relative to the center of the container.
  mouse.setOrigin(container);
  //-----------------------------------------
  var counter = 0;
  var updateRate = 10;
  var isTimeToUpdate = function() {
    return counter++ % updateRate === 0;
  };
  //-----------------------------------------
  var onMouseEnterHandler = function(event) {
    update(event);
  };
  var onMouseLeaveHandler = function() {
    inner.style = "";
  };
  var onMouseMoveHandler = function(event) {
    if (isTimeToUpdate()) {
      update(event);
    }
  };
  //-----------------------------------------
  var update = function(event) {
    mouse.updatePosition(event);
    updateTransformStyle(
      (mouse.y / inner.offsetHeight / 2).toFixed(2),
      (mouse.x / inner.offsetWidth / 2).toFixed(2)
    );
  };
  var updateTransformStyle = function(x, y) {
    var style = "rotateX(" + x + "deg) rotateY(" + y + "deg)";
    inner.style.transform = style;
    inner.style.webkitTransform = style;
    inner.style.mozTransform = style;
    inner.style.msTransform = style;
    inner.style.oTransform = style;
  };
  //-----------------------------------------
  container.onmouseenter = onMouseEnterHandler;
  container.onmouseleave = onMouseLeaveHandler;
  container.onmousemove = onMouseMoveHandler;
});
body {
  font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  color: #333;
  font-size: 14px;
  line-height: 20px;
}


.container {
  position: relative;
  overflow: hidden;
  -webkit-perspective: 50px;
  perspective: 50px;
}


.inner {
  position: static;
  display: block;
  width: 100%;
  height: 100vh;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background-image: url('https://www.planwallpaper.com/static/images/6909249-black-hd-background.jpg');
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div id="container" class="container">
    <div id="inner" class="inner"></div>
</div>

2 个答案:

答案 0 :(得分：1)

调整背景图片的大小无济于事。这些间隙是由div.inner的旋转方式引起的。这是一个简单的图形说明：

enter image description here

可能的解决方案：

  1. 旋转时缩放div。您需要按(1 / cos(rotation_angle))进行缩放。但这不是很好的方法。看起来还不够好。

  2. 根据最大可能的旋转角度对div.inner进行一次缩放。不要忘记以负的边距或position: absolute将其移动到所需位置。

这里是一个基于您的代码的示例。注意，它不是完整的工作代码，我只是修改了宽度和边距。要完全获得所需的内容，您需要自己设置比例和位置。

$(function() {
  // Init
  var container = document.getElementById("container"),
    inner = document.getElementById("inner");
  // Mouse
  var mouse = {
    _x: 0,
    _y: 0,
    x: 0,
    y: 0,
    updatePosition: function(event) {
      var e = event || window.event;
      this.x = e.clientX - this._x;
      this.y = (e.clientY - this._y) * -1;
    },
    setOrigin: function(e) {
      this._x = e.offsetLeft + Math.floor(e.offsetWidth / 2);
      this._y = e.offsetTop + Math.floor(e.offsetHeight / 2);
    },
    show: function() {
      return "(" + this.x + ", " + this.y + ")";
    }
  };
  // Track the mouse position relative to the center of the container.
  mouse.setOrigin(container);
  //-----------------------------------------
  var counter = 0;
  var updateRate = 10;
  var isTimeToUpdate = function() {
    return counter++ % updateRate === 0;
  };
  //-----------------------------------------
  var onMouseEnterHandler = function(event) {
    update(event);
  };
  var onMouseLeaveHandler = function() {
    inner.style = "";
  };
  var onMouseMoveHandler = function(event) {
    if (isTimeToUpdate()) {
      update(event);
    }
  };
  //-----------------------------------------
  var update = function(event) {
    mouse.updatePosition(event);
    updateTransformStyle(
      (mouse.y / inner.offsetHeight / 2).toFixed(2),
      (mouse.x / inner.offsetWidth / 2).toFixed(2)
    );
  };
  var updateTransformStyle = function(x, y) {
    var style = "rotateX(" + x + "deg) rotateY(" + y + "deg)";
    inner.style.transform = style;
    inner.style.webkitTransform = style;
    inner.style.mozTransform = style;
    inner.style.msTransform = style;
    inner.style.oTransform = style;
  };
  //-----------------------------------------
  container.onmouseenter = onMouseEnterHandler;
  container.onmouseleave = onMouseLeaveHandler;
  container.onmousemove = onMouseMoveHandler;
});
body {
  font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  color: #333;
  font-size: 14px;
  line-height: 20px;
}


.container {
  position: relative;
  overflow: hidden;
  -webkit-perspective: 50px;
  perspective: 50px;
}


.inner {
  position: static;
  display: block;
  width: 130%; margin-left: -40px;
  height: 100vh;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background-image: url('https://www.planwallpaper.com/static/images/6909249-black-hd-background.jpg');
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div id="container" class="container">
    <div id="inner" class="inner"></div>
</div>

答案 1 :(得分：1)

您的代码已根据@Xufox的评论进行了更新：

$(function() {
  // Init
  var container = document.getElementById("container"),
    inner = document.getElementById("inner");
  // Mouse
  var mouse = {
    _x: 0,
    _y: 0,
    x: 0,
    y: 0,
    updatePosition: function(event) {
      var e = event || window.event;
      this.x = e.clientX - this._x;
      this.y = (e.clientY - this._y) * -1;
    },
    setOrigin: function(e) {
      this._x = e.offsetLeft + Math.floor(e.offsetWidth / 2);
      this._y = e.offsetTop + Math.floor(e.offsetHeight / 2);
    },
    show: function() {
      return "(" + this.x + ", " + this.y + ")";
    }
  };
  // Track the mouse position relative to the center of the container.
  mouse.setOrigin(container);
  //-----------------------------------------
  var counter = 0;
  var updateRate = 10;
  var isTimeToUpdate = function() {
    return counter++ % updateRate === 0;
  };
  //-----------------------------------------
  var onMouseEnterHandler = function(event) {
    update(event);
  };
  var onMouseLeaveHandler = function() {
    inner.style = "";
  };
  var onMouseMoveHandler = function(event) {
    if (isTimeToUpdate()) {
      update(event);
    }
  };
  //-----------------------------------------
  var update = function(event) {
    mouse.updatePosition(event);
    updateTransformStyle(
      (mouse.y / inner.offsetHeight / 2).toFixed(2),
      (mouse.x / inner.offsetWidth / 2).toFixed(2)
    );
  };
  var updateTransformStyle = function(x, y) {
    var style = "rotateX(" + x + "deg) rotateY(" + y + "deg)";
    inner.style.transform = style;
    inner.style.webkitTransform = style;
    inner.style.mozTransform = style;
    inner.style.msTransform = style;
    inner.style.oTransform = style;
  };
  //-----------------------------------------
  container.onmouseenter = onMouseEnterHandler;
  container.onmouseleave = onMouseLeaveHandler;
  container.onmousemove = onMouseMoveHandler;
});
html, body {margin:0 ;padding:0}

body {
  font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  color: #333;
  font-size: 14px;
  line-height: 20px;
}


.container {
  position: relative;
  overflow: hidden;
  -webkit-perspective: 50px;
  perspective: 50px;
}


.inner {
  position: static;
  display: block;

  width: 120vw;
  height: 120vh;
  margin:-10vh 0 0 -10vw;
  transition:.5s;


  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background-image: url('https://www.planwallpaper.com/static/images/6909249-black-hd-background.jpg');
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
  bbackground-attachment: fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div id="container" class="container">
    <div id="inner" class="inner"></div>
</div>

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