nothing: Coin

<html><head><meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Sprite Animation Demo</title>
<style></style></head>
<body>
<canvas id="coinAnimation" width="100" height="100"></canvas>
<script>

(function() {

var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame']
|| window[vendors[x]+'CancelRequestAnimationFrame'];
}

if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};

if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}());

(function () {

var coin,
coinImage,
canvas;

function gameLoop () {

window.requestAnimationFrame(gameLoop);

coin.update();
coin.render();
}

function sprite (options) {

var that = {},
frameIndex = 0,
tickCount = 0,
ticksPerFrame = options.ticksPerFrame || 0,
numberOfFrames = options.numberOfFrames || 1;

that.context = options.context;
that.width = options.width;
that.height = options.height;
that.image = options.image;

that.update = function () {

tickCount += 1;

if (tickCount > ticksPerFrame) {

tickCount = 0;

// If the current frame index is in range
if (frameIndex < numberOfFrames - 1) {
// Go to the next frame
frameIndex += 1;
} else {
frameIndex = 0;
}
}
};

that.render = function () {

// Clear the canvas
that.context.clearRect(0, 0, that.width, that.height);

// Draw the animation
that.context.drawImage(
that.image,
frameIndex * that.width / numberOfFrames,
0,
that.width / numberOfFrames,
that.height,
0,
0,
that.width / numberOfFrames,
that.height);
};

return that;
}

// Get canvas
canvas = document.getElementById("coinAnimation");
canvas.width = 100;
canvas.height = 100;

// Create sprite sheet
coinImage = new Image();

// Create sprite
coin = sprite({
context: canvas.getContext("2d"),
width: 1000,
height: 100,
image: coinImage,
numberOfFrames: 10,
ticksPerFrame: 4
});

// Load sprite sheet
coinImage.addEventListener("load", gameLoop);
coinImage.src = "http://www.williammalone.com/articles/create-html5-canvas-javascript-sprite-animation/images/coin-sprite-animation.png";

} ());
</script>

</body></html>

samedi 25 novembre 2017

Coin