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    <p>I'm sure the answers above are more elegant, but I've been working on this code all morning and I want to share ...</p> <p><a href="http://jsfiddle.net/KaliedaRik/hceDQ/" rel="nofollow" title="Demo of code here">Demo of code here</a></p> <pre><code>//requestAnimFrame shim via Paul Irish window.requestAnimFrame = (function(callback){ return (window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback){window.setTimeout(callback, 1000/60);}); })(); //main code window.onload = function(){ //setup canvas var canvas = document.getElementById('mycanvas'); var ctx = canvas.getContext('2d'); //variables var canvasWidth = 400, canvasHeight = 400; //as set up in the &lt;canvas&gt; tag var animationTime = 10000; //animation length in milliseconds //clear canvas function var clearCanvas = function(){ ctx.clearRect(0, 0, canvasWidth, canvasHeight); }; //define the line; build function for displaying it var _myPtArr = [ {x:297, y:30}, {x:299,y:47}, {x:350,y:56}, {x:305,y:176}, {x:278,y:169}, {x:303,y:108}, {x:269,y:79}, {x:182,y:90}, {x:137,y:81}, {x:173,y:33}, {x:231,y:38} ]; var lineColor = 'red'; var drawLine = function(){ ctx.beginPath(); ctx.moveTo(_myPtArr[0].x, _myPtArr[0].y); for(var i=1, z=_myPtArr.length; i&lt;z; i++){ ctx.lineTo(_myPtArr[i].x, _myPtArr[i].y); } ctx.strokeStyle = lineColor; ctx.stroke(); }; //define the ball; build function for displaying it var myBall = {x: 0, y: 0, radius: 5, fillStyle: 'blue', strokeStyle: 'black'}; var drawBall = function(){ ctx.beginPath(); ctx.arc(myBall.x, myBall.y, myBall.radius, 0, (Math.PI*2)); ctx.closePath(); ctx.fillStyle = myBall.fillStyle; ctx.strokeStyle = myBall.strokeStyle; ctx.fill(); ctx.stroke(); }; //build an array of objects for each line to help ball position calculations var myBallVectors = []; var fullDistance = 0, p, q, dx, dy, tempDistance, tempTime, fullTime = 0; for(var i=1, z=_myPtArr.length; i&lt;z; i++){ p = _myPtArr[i-1], q = _myPtArr[i]; dx = q.x - p.x; dy = q.y - p.y; tempDistance = Math.sqrt((dx*dx)+(dy*dy)); fullDistance += tempDistance; myBallVectors.push({x: p.x, y: p.y, dX: dx, dY: dy, magnitude: tempDistance}); } for(var i=0, z=myBallVectors.length; i&lt;z; i++){ myBallVectors[i]['start'] = fullTime * animationTime; tempTime = myBallVectors[i].magnitude/fullDistance; fullTime += tempTime myBallVectors[i]['duration'] = tempTime * animationTime; myBallVectors[i]['finish'] = fullTime * animationTime; } //function to work out where ball is in space and time var myBallPosition = function(){ if(Date.now() &gt; breakTime){ //move on to next line currentLine++; //check to see if animation needs to finish if(currentLine &gt;= myBallVectors.length){ doAnimation = false; } //otherwise, set new break point else{ breakTime = startTime + parseInt(myBallVectors[currentLine].finish); } } if(doAnimation){ //calculate ball's current position var timePassed = Date.now() - (startTime + myBallVectors[currentLine].start) var percentageLineDone = timePassed/myBallVectors[currentLine].duration; myBall.x = myBallVectors[currentLine].x + (myBallVectors[currentLine].dX * percentageLineDone); myBall.y = myBallVectors[currentLine].y + (myBallVectors[currentLine].dY * percentageLineDone); } }; //setup and display initial scene drawLine(); myBall.x = _myPtArr[0].x; myBall.y = _myPtArr[0].y; drawBall(); //animation loop function animate = function(){ clearCanvas(); drawLine(); myBallPosition(); drawBall(); if(doAnimation){ requestAnimFrame(function(){ animate(); }); } }; //setup control variables, and start animation var startTime = Date.now(), currentLine = 0; var breakTime = startTime + parseInt(myBallVectors[currentLine].finish); var doAnimation = true; animate(); }; </code></pre>
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    1. POAnimating an object through an array of points on Canvas while maintaining a uniform speed?
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    1. CO+1, Nice, thanks for sharing.
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    2. COStrong! Thanks for the response! +1~
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