Moving background mask with mousemove (jQuery, CSS)

Question

I am trying to create a page with this effect:

.

Everything was right for me until I tried to implement the background. I'm used to photoshop (with layers and masks ), but unfortunately html has no masks.

Here is what I have.

Violin

JQuery

$(document).ready(function() {
  // calculate screen size
  var pageHeight = $(window).height();
  var pageWidth = $(window).width();

  $(window).on('mousemove', function(event) {
    // horizontal offset
      // 100% = completely dependable on mouse position
    var differenceFactor = 5;
    var mouse_x = event.pageX + 1
    var mouse_xPercentage = 100 / (pageWidth / mouse_x);
    var transformX = (mouse_x * -1) / (100 / differenceFactor) - (pageWidth);
    var actualTransform = transformX;

    // vertical offset
    // base degrees
    var baseDeg = -23;
    // 100% = completely rotating
    var rotateFactor = 10;
    var mouse_y = event.pageY + 1;
    var mouse_yPercentage = 100 / (pageHeight / mouse_y);
    var deg = baseDeg + (((180 * (mouse_yPercentage / 100)) - 90) * (rotateFactor / 100));

    $('.article-bg').css({
      '-webkit-transform': 'translate(' + transformX + 'px, 0) scale(2) rotate(' + deg + 'deg)',
      'transform': 'translate(' + transformX + 'px, 0) scale(2) rotate(' + deg + 'deg)'
    });
    $('.actual-bg').css({
      '-webkit-transform': 'translate(' + 0 + 'px, 0) rotate(' + (-deg) + 'deg)',
      'transform': 'translate(' + 0 + 'px, 0) rotate(' + (-deg) + 'deg)'
    });
    })
  .on('resize', function() {
    var pageHeight = $(this).height();
    var pageWidth = $(this).width();
  });
});

I hope someone can complete this task!

Answer 1

, <div> , . <svg> . <clipPath> a <polygon> . div, .

---

HTML:

<div id="content">
    <article class="valign">
        <h1>The Article</h1>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </article>
</div>
<div id="bg">
    <svg width="0" height="0">
      <clipPath id="clipPolygon">
        <polygon id="polygon">
        </polygon>
      </clipPath>
    </svg>
</div>

CSS

#content,
#bg{
    position: absolute;
    left:0;
    top:0;
    height:100%;
    width:100%;
}
#content {
  background: #333;
  color: rgba(255, 255, 255, 0.87);
  padding: 20px;
}
#bg {
  background: url("http://res.cloudinary.com/derkjanspeelman/image/upload/v1474556599/diensten-main-bg_hv2aoc.jpg") center/cover no-repeat;
  background-size: cover;
  -webkit-clip-path: polygon(100% 100%, 100% 0%, 50% 0%, 50% 100%);
  clip-path: url("#clipPolygon");
}

Javascript-, http://codepen.io/iXshad0w/pen/zKwJaW, .

: D