scratchfoundation/paper.js
1
0
Fork 0
mirror of https://github.com/scratchfoundation/paper.js.git synced 2024-12-29 09:22:22 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Examples: Move improved and simplified version of Bouncing Balls to Paperjs.org folder.

Browse source
This commit is contained in:
Jonathan Puckey 2013-03-02 20:58:56 +01:00
parent a3880bab5e
commit 3db61a3509
1 changed files with 57 additions and 58 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

115
examples/Scripts/BouncingBalls.html
View file

@ -6,63 +6,60 @@
<link rel="stylesheet" href="../css/style.css">
<script type="text/javascript" src="../../dist/paper.js"></script>
<script type="text/paperscript" canvas="canvas">
var balls = [];
var group = new Group();
var Ball = Base.extend({
initialize: function(point, vector) {
if (!vector || vector.isZero()) {
this.vector = Point.random() * 5;
} else {
this.vector = vector * 2;
}
this.point = point;
this.dampen = 0.4;
this.gravity = 3;
this.bounce = -0.6;
this.radius = 50 * Math.random() + 30;
this.createPaths();
group.addChild(this.item);
},
createPaths: function() {
var overlayPos = this.point + this.radius / 8;
var compound = new CompoundPath([
new Path.Circle(this.point, this.radius),
new Path.Circle(overlayPos, this.radius / 2)
]);
var color = new HsbColor(Math.random() * 360, 1, 1);
var gradient = new RadialGradient(color, 'black');
compound.fillColor = new GradientColor(gradient, this.point,
this.point + this.radius, overlayPos);
var overlay = new Path.Circle(overlayPos, this.radius / 2);
var overlayColor = color.clone();
var fullOverlay = color.clone();
overlayColor.alpha = 0.5;
var overlayGradient = new LinearGradient(new RgbColor(1, 1, 1, 0.5), new RgbColor(1, 1, 1, 1));
overlay.fillColor = new GradientColor(overlayGradient, overlayPos, overlayPos + this.radius / 2);
this.item = new Group(compound, overlay);
},
iterate: function() {
var size = view.size;
this.vector.y += this.gravity;
this.vector.x *= 0.99;
var pre = this.point + this.vector;
if (pre.x < this.radius || pre.x > size.width - this.radius)
this.vector.x *= -this.dampen;
if (pre.y < this.radius || pre.y > size.height - this.radius) {
if (Math.abs(this.vector.x) < 3)
this.vector = Point.random() * [150, 100] + [-75, 20];
this.vector.y *= this.bounce;
}
var max = Point.max(this.radius, this.point + this.vector);
this.item.position = this.point = Point.min(max, size - this.radius);
this.item.rotate(this.vector.x / 2);
var Ball = function(point, vector) {
if (!vector || vector.isZero()) {
this.vector = Point.random() * 5;
} else {
this.vector = vector * 2;
}
});
this.point = point;
this.dampen = 0.4;
this.gravity = 3;
this.bounce = -0.6;
var color = new HsbColor({
hue: Math.random() * 360,
saturation: 1,
brightness: 1
});
var gradient = new RadialGradient(color, 'black');
var radius = this.radius = 50 * Math.random() + 30;
this.item = new CompoundPath({
children: [
new Path.Circle({
radius: radius
}),
new Path.Circle({
center: radius / 8,
radius: radius / 3
})
],
fillColor: new GradientColor(gradient, 0, radius, radius / 8),
position: this.point
});
}
Ball.prototype.iterate = function() {
var size = view.size;
this.vector.y += this.gravity;
this.vector.x *= 0.99;
var pre = this.point + this.vector;
if (pre.x < this.radius || pre.x > size.width - this.radius)
this.vector.x *= -this.dampen;
if (pre.y < this.radius || pre.y > size.height - this.radius) {
if (Math.abs(this.vector.x) < 3)
this.vector = Point.random() * [150, 100] + [-75, 20];
this.vector.y *= this.bounce;
}
var max = Point.max(this.radius, this.point + this.vector);
this.item.position = this.point = Point.min(max, size - this.radius);
this.item.rotate(this.vector.x);
};
var balls = [];
for (var i = 0; i < 10; i++) {
var position = Point.random() * view.size,
vector = (Point.random() - [0.5, 0]) * [50, 100],
@ -70,9 +67,11 @@
balls.push(ball);
}
var textItem = new PointText(20, 30);
textItem.fillColor = 'black';
textItem.content = 'Click, drag and release to add balls.'
var textItem = new PointText({
point: [20, 30],
fillColor: 'black',
content: 'Click, drag and release to add balls.'
});
var lastDelta;
function onMouseDrag(event) {