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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class="controls">
  <label for="speed">Speed</label>
  <input type="number" id="speed" value=5>
  <label for="ease">Ease</label>
  <select name="ease" id="ease">
    <option value="Power0.easeNone">None</option>
    <option value="Elastic.easeOut">Elastic Out</option>
    <option value="Elastic.easeIn">Elastic In</option>
    <option value="Elastic.easeInOut">Elastic In-Out</option>
    <option value="Bounce.easeOut">Bounce Out</option>
    <option value="Bounce.easeIn">Bounce In</option>
    <option value="Bounce.easeInOut">Bounce In-Out</option>
    <option value="Circ.easeOut">Circ Out</option>
    <option value="Circ.easeIn">Circ In</option>
    <option value="Circ.easeInOut">Circ In-Out</option>
    <option value="Cubic.easeOut">Cubic Out</option>
    <option value="Cubic.easeIn">Cubic In</option>
    <option value="Cubic.easeInOut">Cubic In-Out</option>
    <option value="Power0.easeOut">Power0 Out</option>
    <option value="Power0.easeIn">Power0 In</option>
    <option value="Power0.easeInOut">Power0 In-Out</option>
    <option value="Power1.easeOut">Power1 Out</option>
    <option value="Power1.easeIn">Power1 In</option>
    <option value="Power1.easeInOut">Power1 In-Out</option>
    <option value="Power2.easeOut">Power2 Out</option>
    <option value="Power2.easeIn">Power2 In</option>
    <option value="Power2.easeInOut">Power2 In-Out</option>
    <option value="Power3.easeOut">Power3 Out</option>
    <option value="Power3.easeIn">Power3 In</option>
    <option value="Power3.easeInOut">Power3 In-Out</option>
    <option value="Power4.easeOut">Power4 Out</option>
    <option value="Power4.easeIn">Power4 In</option>
    <option value="Power4.easeInOut">Power4 In-Out</option>
  </select>
  <button id="play">PLAY</button>
  <select name="image-selector" id="image-selector">
    <option value="plane">Plane</option>
    <option value="ball">Baseball</option>
  </select>
  <label for="backwards">Animate backwards?</label>
  <input type="checkbox" id="backwards" name="backwards"/>
  <label for="auto-rotate">Auto rotate?</label>
  <input type="checkbox" id="auto-rotate" name="backwards"/>
</div>
<div id="stage-container">
    <svg id="stage" width="1024" height="568" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 568">
    <foreignObject width="1024" height="568">
      <img id="ball" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/81395/ball.png" alt="">
      <img id="plane" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/81395/plane.png" alt="">    
    </foreignObject>
  </svg>
  <svg id="bez">
    <path class="path" d="M0 0 l800 79-800 59 800 66-800 62 800 71-800 77 400 51"/>
    <path class="reverse"/>
  </svg>
</div>
!

CSS 

              
                .path
  stroke: red
  stroke-width: 5
  fill: none
svg
  display: block
  position: absolute
  top: 50px
  left: 100px
  &#stage
    background: white
    overflow: hidden
  &#bez
    background: transparent
    overflow: visible
foreignObject
  overflow: hidden
  img
    pointer-events: none
#data
  color: white
  position: fixed
  bottom: 10px
  left: 40px
  right: 40px
  text-align: center
body
  background-color: black
  font-family: monospace
  font-size: 1.4em
  color: white
#plane
  height: 67px
  display: block
#ball
  width: 100px
  display: none
// svg#bez g path
//   transform: scale(2.0)
// svg#bez g path:first-child
//   transform: scale(1.0)
path.reverse
  visibility: hidden
!

JS 

              
                let pe = PathEditor.create(".path", {draggable:false, selected:true, handleSize: 10});

var stageContainer = document.getElementById('stage-container'),
    plane = document.getElementById('plane'),
    ball = document.getElementById('ball'),
    path = document.querySelector('path.path'),
    bezContainer = document.getElementById('bez'),
    bez = [], backBez = [], useBez = [];

function animateIt() {
  let dims = getXY({el: plane, path: path}), I = getImage();
  var t = I._gsTransform;
  t.x = 0;
  t.y = 0;
  let pd = path;
  bez = MorphSVGPlugin.pathDataToBezier(pd,{align:"relative", offsetX: dims.x, offsetY: dims.y});
  backBez = bez.slice(0);
  backBez.reverse();
  let autoRotate = $('#auto-rotate').prop('checked');
  useBez = $('#backwards').prop('checked') ? backBez : bez;
  let e = $('select#ease').val();
  let s = $('input#speed').val();
  TweenLite.to(I, s, {bezier:{
      values: useBez, type:"cubic", autoRotate: autoRotate
    }, 
    scaleY:"+=1", //just to trigger a value that we can set in the modifier below..
    modifiers:{
      scaleY:function(v) {
        return (t.rotation < 90 && t.rotation > -90) ? 1 : -1;
      }
    }, 
    ease: e, 
    onStart: hideBez, 
    onComplete: showBez});
}

function getImage() {
  let selector = $('#image-selector').val();
  if( selector == 'ball' ) {
    plane.style.display = 'none';
    ball.style.display = 'block';
    return ball;
  } else {
    plane.style.display = 'block';
    ball.style.display = 'none';
    return plane;
  }
}

function getXY(obj) {
  let I = obj.el;
  let bz = MorphSVGPlugin.pathDataToBezier(obj.path);
  let t = bz[0];
  let iDims = I.getBoundingClientRect();
  let X = (-1*iDims.width/2)+t.x,
      Y = (-1*iDims.height/2)+t.y;
  return {x: X, y: Y};
}

function hideBez() {
  $('svg#bez').hide();
}

function showBez() {
  $('svg#bez').show();
}

function init() {
  // flip the plane around so it's going in the right direction
  let dims = getXY({el: plane, path: path});
  TweenMax.set(plane,{transformOrigin: 'center center', x: dims.x, y: dims.y});
  dims = getXY({el: plane, path: path});
  TweenMax.set(ball,{transformOrigin: 'center center', x: dims.x, y: dims.y});
}

$('#play').on('click', function(){
  animateIt();
});

init();
!
999px

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