HTML5 - Beginners - CreateMultidimensionalArray.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width" />
</head>
<body bgcolor="black">
<div id="test"></div>
<style>#myCanvas {touch-action: none;}</style>
<canvas id="myCanvas" width="320" height="240" style="border:0px solid #d3d3d3;">
Use different browser.
</canvas>
	<script>
	var c=document.getElementById("myCanvas");
	var ctx=c.getContext("2d");

	var mapwidth = 100;
	var mapheight = 100;
	//var tilewidth = Math.floor(myCanvas.width/mapwidth)+1;
	//var tileheight = Math.floor(myCanvas.height/mapheight)+1;
	map = [];
	for(var i=0;i<mapwidth;i++){
		map[i] = new Array();
		for(var j=0;j<mapheight;j++){
			map[i][j]=0;
		}
	}	
	map[10][10]=50;


	gameloop=setInterval(doGameLoop,16);

	function doGameLoop(){
		myCanvas.height = window.innerHeight-32;
		myCanvas.width = window.innerWidth-32;
		tilewidth = Math.floor(myCanvas.width/mapwidth)+1;
		tileheight = Math.floor(myCanvas.height/mapheight)+1;
		
		ctx.fillStyle="rgb(0,0,0)";
		ctx.fillRect(0,0,c.width,c.height);

		for(var y=0;y<mapheight;y++){
		for(var x=0;x<mapwidth;x++){
			var col=map[x][y];
			ctx.fillStyle="rgb("+col+","+col+","+col+")";
			ctx.fillRect(x*tilewidth,y*tileheight,tilewidth,tileheight);
		}}
		ctx.fillStyle="rgb(255,255,255)";
		ctx.fillText("Javascript Html canvas example.",10,10); 

	}
</script>
</body>
</html>