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jQuery animation faster

Posted on 2016-11-09
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Last Modified: 2016-11-23
How do I control the speed of the following animation?

<script>
(function() {
  var requestAnimationFrame1 = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
                              window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
  window.requestAnimationFrame = requestAnimationFrame1;
})();
 var canvas1 = document.getElementById('canvas1');
 var context1 = canvas1.getContext('2d');
 var x1 = canvas1.width / 2;
 var y1 = canvas1.height / 2;
 var radius1 = 63;
 var endPercent1 = 90;
 var curPerc1 = 0;
 var counterClockwise1 = false;
 var circ1 = Math.PI * 2;
 var quart1 = Math.PI / 2;

 context1.lineWidth = 13;
 context1.strokeStyle = '#d32128';
 context1['imageSmoothingEnabled'] = false;       /* standard */
    context1['mozImageSmoothingEnabled'] = false;    /* Firefox */
    context1['oImageSmoothingEnabled'] = false;      /* Opera */
    context1['webkitImageSmoothingEnabled'] = false; /* Safari */
    context1['msImageSmoothingEnabled'] = false;     /* IE */



 function animate1(current) {
     //context.clearRect(0, 0, canvas.width, canvas.height);
     context1.beginPath();
     context1.arc(x1, y1, radius1, -(quart1), ((circ1) * current) - quart1, false);
     context1.stroke();
     curPerc1++;
     if (curPerc1 < endPercent1) {
         requestAnimationFrame(function () {
             animate1(curPerc1 / 100)
         });
     }
 }

</script>

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Question by:rgranlund
1 Comment
 
LVL 54

Accepted Solution

by:
Julian Hansen earned 500 total points
ID: 41880966
Change line 33.

To make it faster add more than 1
To make it slower add less than 1

Faster
curPerc1+=2; // twice as fast

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Slower
curPerc1+=0.5 /half as fast

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