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    <p>I have found that using prototypes is very helpful here. If you aren't familiar with them, prototypes are part of objects that allow you to set your own variables and/or methods to them.</p> <p>Doing something like:</p> <pre><code>Image.prototype.position = { x: 0, y: 0 } Image.prototype.onload = function(){ context.drawImage(this, this.position.x, this.position.y); } </code></pre> <p>allows you to set position and draw to the canvas without too much work.</p> <p>The "position" variable allows you to move it around on the canvas.<br> So it's possible to do:</p> <pre><code>var myImg = new Image(); myImg.position.x = 20; myImg.position.y = 200; myImg.src = "http://www.google.com/intl/en_ALL/images/logo.gif"; </code></pre> <p>and the image will automatically draw to the canvas at (20,200).</p> <p>Prototype works for all HTML and native Javascript objects. So</p> <pre><code>Array.prototype.sum = function(){ var _sum = 0.0; for (var i=0; i&lt;this.length; i++){ _sum += parseFloat(this[i]); } return _sum; } </code></pre> <p>gives a new function to all Arrays.</p> <p>However, </p> <pre><code>var Bob; Bob.Prototype.sayHi = function(){ alert("Hello there."); } </code></pre> <p>will not work (for multiple reasons, but i'll just talk about prototypes).<br> Prototype is a "property" of sorts, which contains all the your properties/methods that you input, and is already in each of the HTML and native Javascript objects (not the ones you make).<br> Prototypes also allow for easy calling (you can do "myImg.position.x" instead of "myImg.prototype.position.x" ).</p> <p>Besides, if you are defining you variable, you should do it more like this.</p> <pre><code>var Bob = function(){ this.sayHi = function(){ alert("Hello there."); } } </code></pre>
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    1. POHow to fetch a remote image to display in a canvas?
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    1. USTheCrzyMan
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      1. VTUpMod
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