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Fabricjs-easing

em2464 2022-04-02 10:35 原文

缓动函数  

https://www.xuanfengge.com/easeing/easeing/

 

 html页面不是重点

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="../fabric.js"></script>
  <title>Document</title>
  <style>
    .canvas-container {
      width: 500px;
      height: 500px;
      position: relative;
      user-select: none;
      border: 1px dotted #ccc;
      display: inline-block;
      vertical-align: top;
    }

    #c {
      border: 1px solid rgb(204, 204, 204);
      position: absolute;
      width: 500px;
      height: 500px;
      left: 0px;
      top: 0px;
      touch-action: none;
      user-select: none;
    }

    .options {
      display: inline-flex;
      width: auto;
      flex-direction: column;
    }
  </style>
</head>

<body>
  <div>
    <h5>
      <a target="_blank" href="https://www.xuanfengge.com/easeing/easeing/">缓动函数</a>
    </h5>
  </div>
  <div class="canvas-container">
    <canvas id="c" width="500" height="500"></canvas>
  </div>
  <div class="options">
    <select id="easing">
      <option>easeInQuad</option>
      <option>easeOutQuad</option>
      <option>easeInOutQuad</option>
      <option>easeInCubic</option>
      <option>easeOutCubic</option>
      <option>easeInOutCubic</option>
      <option>easeInQuart</option>
      <option>easeOutQuart</option>
      <option>easeInOutQuart</option>
      <option>easeInQuint</option>
      <option>easeOutQuint</option>
      <option>easeInOutQuint</option>
      <option>easeInSine</option>
      <option>easeOutSine</option>
      <option>easeInOutSine</option>
      <option>easeInExpo</option>
      <option>easeOutExpo</option>
      <option>easeInOutExpo</option>
      <option>easeInCirc</option>
      <option>easeOutCirc</option>
      <option>easeInOutCirc</option>
      <option>easeInElastic</option>
      <option>easeOutElastic</option>
      <option>easeInOutElastic</option>
      <option>easeInBack</option>
      <option>easeOutBack</option>
      <option>easeInOutBack</option>
      <option>easeInBounce</option>
      <option>easeOutBounce</option>
      <option>easeInOutBounce</option>
    </select>
    <button id="animate">Animate</button>
  </div>
  <script src="./index.js"></script>
</body>

</html>
View Code

 

(function() {
  var canvas = this.__canvas = new fabric.Canvas('c')
  var rect = new fabric.Rect({
    width: 50,
    height: 50,
    left: 100,
    top: 100,
    stroke: '#aff',
    strokeWidth: 5,
    fill: '#faa',
    selectable: false
  })
  canvas.add(rect)
  var animateBtn = document.getElementById('animate');
  animateBtn.onclick = function() {
    animateBtn.disabled = true;
    rect.animate('left', rect.left === 100 ? 400 : 100, {
      duration: 1000,
      onChange: canvas.renderAll.bind(canvas),
      onComplete: function() {
        animateBtn.disabled = false;
      },
      easing: fabric.util.ease[document.getElementById('easing').value] //*********  
    })
  }
})()

 

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