Random walks on a grid, Javascript
Some quick Javascript which plots random walks from a point…
View it here.
<html>
<head>
<script type="text/javascript">
var ittr=8;
var delta=-0.005;
function draw_frame() {
var canvas = document.getElementById("m_canvas");
if(canvas.getContext) {
var ctx = canvas.getContext("2d");
ctx.lineWidth = 0;
ctx.fillStyle = "rgb(0,0,0)";
var x=250;
var y=250;
for(var n=0;n<200;n++) {
var r=Math.floor(Math.random()*4);
if(r==0) { x+=1; y+=0; }
if(r==1) { x+=0; y+=1; }
if(r==2) { x-=1; y+=0; }
if(r==3) { x-=0; y-=1; }
ctx.fillRect(x*1,y*1,1,1);
}
ctx.fillStyle = "rgb(0,200,200)";
ctx.fillRect(250,250,3,3);
}
}
</script>
</head>
<body onload="setInterval(draw_frame,10);" >
<canvas id="m_canvas" width="500" height="500">You need a Javascipt</canvas>
</body>
</html>
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