Generate random dots oncanvas
By Bartłomiej Bartel
Simple example of generating random dots on canvas.
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
}
</style>
</head>
<body>
<canvas id="myCanvas" width="600" height="300"></canvas>
<script>
var startX = 0;
var startY = 0;
var radius = 5;
var randomColor = "#000000";
var randomEncounter = 0;
var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
function getRandomNumber(max) {
var rn = Math.round(Math.random() * max);
return rn;
}
function animate() {
webkitRequestAnimationFrame(animate);
randomEncounter = getRandomNumber(10);
if (randomEncounter == 1)
{
// GET RANDOM VALUES
startX = getRandomNumber(canvas.width);
startY = getRandomNumber(canvas.height);
radius = getRandomNumber(50);
randomColor = "#"+Math.random().toString(16).slice(-6); // generates random color HEX
// DRAW THE CIRCLE BASED ON THE RANDOM VALUES
ctx.fillStyle = randomColor;
ctx.beginPath();
ctx.arc(startX, startY, radius, 0 * Math.PI, 2 * Math.PI);
ctx.fill();
}
}
animate();
</script>
</body>
</html>