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HTML5 - Beginners - duplicate Object array.html
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HTML5 - Beginners - duplicate Object array.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width" />
</head>
<body>
<div id="test"></div>
<canvas id="myCanvas" width="320" height="240" style="border:1px solid #d3d3d3;">
Use different browser.
</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
// create a sprite object
var sprite = {
x:0,
y:0
};
// create a sprites array
var sprites = [];
// create <10 sprite objects
// in sprite array.
for(i=0;i<10;i++){
obj = Object.create(sprite);
obj.x = i;
sprites.push(obj);
}
// copy sprites array object
// into new sprites2 array object
var sprites2 = Object.create(sprites);
gameloop=setInterval(doGameLoop,16);
function doGameLoop(){
myCanvas.height = window.innerHeight-32;
myCanvas.width = window.innerWidth-32;
ctx.fillStyle="rgb(0,0,0)";
ctx.fillRect(0,0,c.width,c.height);
ctx.fillStyle="rgb(255,255,255)";
ctx.fillText("Drawing a tilemap example."+sprites.length,10,10);
// draw the sprites object
sprites.forEach((sp,i) => {
ctx.fillText("x:"+sp.x,100,i*30);
});
// draw the sprites copy object
sprites2.forEach((sp,i) => {
ctx.fillText("x:"+sp.x,150,i*30);
});
}
</script>
</body>
</html>