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part8a2.html
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<!DOCTYPE html>
<html>
<title>Creative Coding Yea!</title>
<head>
<meta charset="utf-8">
<script language="javascript" src="js/creative_coding.js"></script>
<script language="javascript" src="js/canvas.js"></script>
<link rel="stylesheet" href="css/reset.css" type="text/css" media="screen" />
<link rel="stylesheet" href="css/style.css" type="text/css" media="screen" />
</head>
<body>
<script>
var ctx = createCanvas("canvas1");
var number_of_balls = 5;
var balls = [];
var radius = 200;
ctx.lineWidth = 1;
// push a ball and it's values into the array
for (var i = 0; i < number_of_balls; i++) {
addBall(i);
}
function addBall(_i){
var ball = {
x: 0,
y: 0,
speed_x: random(1),
speed_y: random(1),
size: random(10, 50),
colour: rgb(0),
radius: 50+ _i*50,
angle: random(360)
}
balls.push(ball);
}
function draw(){
ctx.background(255, 1);
ctx.fillStyle = rgb(0);
ctx.fillEllipse(w/2, h/2, 50);
moveBall();
drawBall();
}
function moveBall(){
for (var i = 0; i < balls.length; i++) {
var b = balls[i];
b.angle += b.speed_x;
b.rotation += 2;
b.x = w/2 + Math.cos(radians(b.angle))*b.radius;
b.y = h/2 + Math.sin(radians(b.angle))*b.radius;
}
}
function drawBall(){
for (var i = 0; i < balls.length; i++) {
var b = balls[i];
ctx.fillStyle = b.colour;
ctx.fillEllipse(b.x, b.y, b.size);
}
}
</script>
</body>
</html>