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<body onload="init();"> | |
<canvas id="myCanvas" width="400" height="400"> | |
Your browser does not support the canvas tag. | |
</canvas> | |
<script id="jsbin-javascript"> | |
var canvas, ctx; | |
var x=100, y=100; | |
var incrementX = 0; | |
function init() { | |
canvas = document.getElementById('myCanvas'); | |
ctx=canvas.getContext('2d'); | |
window.addEventListener('keydown', handleKeydown, false); | |
window.addEventListener('keyup', handleKeyup, false); | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function handleKeydown(event) { | |
if (event.keyCode === 37) { | |
//left key | |
incrementX = -1; | |
} else if (event.keyCode === 39) { | |
// right key | |
incrementX = 1; | |
} | |
} | |
function handleKeyup(event) { | |
incrementX = 0; | |
} | |
function animationLoop() { | |
ctx.clearRect(0, 0, canvas.width, canvas.height); | |
ctx.fillRect(x, y, 10, 10); | |
x += incrementX; | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function start() { | |
// Start the animation loop, targets 60 frames/s | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
</script> | |
<script id="jsbin-source-html" type="text/html"> | |
<body onload="init();"> | |
<canvas id="myCanvas" width="400" height="400"> | |
Your browser does not support the canvas tag. | |
</canvas> | |
</body> | |
</script> | |
<script id="jsbin-source-javascript" type="text/javascript"> var canvas, ctx; | |
var x=100, y=100; | |
var incrementX = 0; | |
function init() { | |
canvas = document.getElementById('myCanvas'); | |
ctx=canvas.getContext('2d'); | |
window.addEventListener('keydown', handleKeydown, false); | |
window.addEventListener('keyup', handleKeyup, false); | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function handleKeydown(event) { | |
if (event.keyCode === 37) { | |
//left key | |
incrementX = -1; | |
} else if (event.keyCode === 39) { | |
// right key | |
incrementX = 1; | |
} | |
} | |
function handleKeyup(event) { | |
incrementX = 0; | |
} | |
function animationLoop() { | |
ctx.clearRect(0, 0, canvas.width, canvas.height); | |
ctx.fillRect(x, y, 10, 10); | |
x += incrementX; | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function start() { | |
// Start the animation loop, targets 60 frames/s | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
</script></body> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var canvas, ctx; | |
var x=100, y=100; | |
var incrementX = 0; | |
function init() { | |
canvas = document.getElementById('myCanvas'); | |
ctx=canvas.getContext('2d'); | |
window.addEventListener('keydown', handleKeydown, false); | |
window.addEventListener('keyup', handleKeyup, false); | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function handleKeydown(event) { | |
if (event.keyCode === 37) { | |
//left key | |
incrementX = -1; | |
} else if (event.keyCode === 39) { | |
// right key | |
incrementX = 1; | |
} | |
} | |
function handleKeyup(event) { | |
incrementX = 0; | |
} | |
function animationLoop() { | |
ctx.clearRect(0, 0, canvas.width, canvas.height); | |
ctx.fillRect(x, y, 10, 10); | |
x += incrementX; | |
requestId = requestAnimationFrame(animationLoop); | |
} | |
function start() { | |
// Start the animation loop, targets 60 frames/s | |
requestId = requestAnimationFrame(animationLoop); | |
} |
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