mirror of
https://github.com/scratchfoundation/paper.js.git
synced 2024-12-28 17:02:24 -05:00
151 lines
4.9 KiB
HTML
151 lines
4.9 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta charset="UTF-8">
|
|
<title>Candy Crash</title>
|
|
<link rel="stylesheet" href="../css/style.css">
|
|
<script type="text/javascript" src="../../dist/paper-full.js"></script>
|
|
<script type="text/paperscript" canvas="canvas">
|
|
// kynd.info 2014
|
|
|
|
function Ball(r, p, v) {
|
|
this.radius = r;
|
|
this.point = p;
|
|
this.vector = v;
|
|
this.maxVec = 15;
|
|
this.numSegment = Math.floor(r / 3 + 2);
|
|
this.boundOffset = [];
|
|
this.boundOffsetBuff = [];
|
|
this.sidePoints = [];
|
|
this.path = new Path({
|
|
fillColor: {
|
|
hue: Math.random() * 360,
|
|
saturation: 1,
|
|
brightness: 1
|
|
},
|
|
blendMode: 'lighter'
|
|
});
|
|
|
|
for (var i = 0; i < this.numSegment; i ++) {
|
|
this.boundOffset.push(this.radius);
|
|
this.boundOffsetBuff.push(this.radius);
|
|
this.path.add(new Point());
|
|
this.sidePoints.push(new Point({
|
|
angle: 360 / this.numSegment * i,
|
|
length: 1
|
|
}));
|
|
}
|
|
}
|
|
|
|
Ball.prototype = {
|
|
iterate: function() {
|
|
this.checkBorders();
|
|
if (this.vector.length > this.maxVec)
|
|
this.vector.length = this.maxVec;
|
|
this.point += this.vector;
|
|
this.updateShape();
|
|
},
|
|
|
|
checkBorders: function() {
|
|
var size = view.size;
|
|
if (this.point.x < -this.radius)
|
|
this.point.x = size.width + this.radius;
|
|
if (this.point.x > size.width + this.radius)
|
|
this.point.x = -this.radius;
|
|
if (this.point.y < -this.radius)
|
|
this.point.y = size.height + this.radius;
|
|
if (this.point.y > size.height + this.radius)
|
|
this.point.y = -this.radius;
|
|
},
|
|
|
|
updateShape: function() {
|
|
var segments = this.path.segments;
|
|
for (var i = 0; i < this.numSegment; i ++)
|
|
segments[i].point = this.getSidePoint(i);
|
|
|
|
this.path.smooth();
|
|
for (var i = 0; i < this.numSegment; i ++) {
|
|
if (this.boundOffset[i] < this.radius / 4)
|
|
this.boundOffset[i] = this.radius / 4;
|
|
var next = (i + 1) % this.numSegment;
|
|
var prev = (i > 0) ? i - 1 : this.numSegment - 1;
|
|
var offset = this.boundOffset[i];
|
|
offset += (this.radius - offset) / 15;
|
|
offset += ((this.boundOffset[next] + this.boundOffset[prev]) / 2 - offset) / 3;
|
|
this.boundOffsetBuff[i] = this.boundOffset[i] = offset;
|
|
}
|
|
},
|
|
|
|
react: function(b) {
|
|
var dist = this.point.getDistance(b.point);
|
|
if (dist < this.radius + b.radius && dist != 0) {
|
|
var overlap = this.radius + b.radius - dist;
|
|
var direc = (this.point - b.point).normalize(overlap * 0.015);
|
|
this.vector += direc;
|
|
b.vector -= direc;
|
|
|
|
this.calcBounds(b);
|
|
b.calcBounds(this);
|
|
this.updateBounds();
|
|
b.updateBounds();
|
|
}
|
|
},
|
|
|
|
getBoundOffset: function(b) {
|
|
var diff = this.point - b;
|
|
var angle = (diff.angle + 180) % 360;
|
|
return this.boundOffset[Math.floor(angle / 360 * this.boundOffset.length)];
|
|
},
|
|
|
|
calcBounds: function(b) {
|
|
for (var i = 0; i < this.numSegment; i ++) {
|
|
var tp = this.getSidePoint(i);
|
|
var bLen = b.getBoundOffset(tp);
|
|
var td = tp.getDistance(b.point);
|
|
if (td < bLen) {
|
|
this.boundOffsetBuff[i] -= (bLen - td) / 2;
|
|
}
|
|
}
|
|
},
|
|
|
|
getSidePoint: function(index) {
|
|
return this.point + this.sidePoints[index] * this.boundOffset[index];
|
|
},
|
|
|
|
updateBounds: function() {
|
|
for (var i = 0; i < this.numSegment; i ++)
|
|
this.boundOffset[i] = this.boundOffsetBuff[i];
|
|
}
|
|
};
|
|
|
|
//--------------------- main ---------------------
|
|
|
|
var balls = [];
|
|
var numBalls = 18;
|
|
for (var i = 0; i < numBalls; i++) {
|
|
var position = Point.random() * view.size;
|
|
var vector = new Point({
|
|
angle: 360 * Math.random(),
|
|
length: Math.random() * 10
|
|
});
|
|
var radius = Math.random() * 60 + 60;
|
|
balls.push(new Ball(radius, position, vector));
|
|
}
|
|
|
|
function onFrame() {
|
|
for (var i = 0; i < balls.length - 1; i++) {
|
|
for (var j = i + 1; j < balls.length; j++) {
|
|
balls[i].react(balls[j]);
|
|
}
|
|
}
|
|
for (var i = 0, l = balls.length; i < l; i++) {
|
|
balls[i].iterate();
|
|
}
|
|
}
|
|
|
|
</script>
|
|
</head>
|
|
<body>
|
|
<canvas id="canvas" resize hidpi="off" style="background:black"></canvas>
|
|
</body>
|
|
</html>
|