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Update BouncingBalls example to the version on Paperjs.org

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This commit is contained in:
Jonathan Puckey 2011-06-19 17:34:32 +02:00
parent 26f326e32d
commit e77caf610b
1 changed files with 32 additions and 27 deletions
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59
examples/Scripts/BouncingBalls.html
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@ -7,10 +7,6 @@
<script type="text/javascript" src="../../dist/paper.js"></script> <script type="text/javascript" src="../../dist/paper.js"></script>
<script type="text/paperscript" canvas="canvas"> <script type="text/paperscript" canvas="canvas">
var balls = []; var balls = [];
var bg = new Path.Rectangle([0, 0], view.size);
bg.fillColor = '#f00';
var group = new Group(); var group = new Group();
var Ball = Base.extend({ var Ball = Base.extend({
@ -18,21 +14,34 @@
if (!vector || vector.isZero()) { if (!vector || vector.isZero()) {
this.vector = Point.random() * 5; this.vector = Point.random() * 5;
} else { } else {
this.vector = vector * 1.5; this.vector = vector * 2;
} }
this.point = point; this.point = point;
this.dampen = 0.4; this.dampen = 0.4;
this.gravity = 3; this.gravity = 3;
this.bounce = -0.6; this.bounce = -0.6;
this.radius = 60; //50 * Math.random() + 30; this.radius = 50 * Math.random() + 30;
this.item = new Path.Circle(point, this.radius); 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 color = new HSBColor(Math.random() * 360, 1, 1);
var gradient = new Gradient([color, new RGBColor(0, 0, 0)], 'radial'); var gradient = new Gradient([color, 'black'], 'radial');
this.item.fillColor = new GradientColor(gradient, point, compound.children[0].fillColor = new GradientColor(gradient, this.point,
point + this.radius, this.radius * 0.8); this.point + this.radius, overlayPos);
this.item.blendMode = 'luminosity'; var overlay = new Path.Circle(overlayPos, this.radius / 2);
// this.item.opacity = 0.75; var overlayColor = color.clone();
group.appendTop(this.item); var fullOverlay = color.clone();
overlayColor.alpha = 0.5;
var overlayGradient = new Gradient([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() { iterate: function() {
@ -47,7 +56,7 @@
this.vector = Point.random() * [150, 100] + [-75, 20]; this.vector = Point.random() * [150, 100] + [-75, 20];
this.vector.y *= this.bounce; this.vector.y *= this.bounce;
} }
var max = Point.max(this.radius, this.point + this.vector); var max = Point.max(this.radius, this.point + this.vector);
this.item.position = this.point = Point.min(max, size - this.radius); this.item.position = this.point = Point.min(max, size - this.radius);
this.item.rotate(this.vector.x / 2); this.item.rotate(this.vector.x / 2);
@ -55,38 +64,34 @@
}); });
for (var i = 0; i < 10; i++) { for (var i = 0; i < 10; i++) {
var position = Point.random() * view.size; var position = Point.random() * view.size,
var vector = (Point.random() - [0.5, 0]) * [50, 100]; vector = (Point.random() - [0.5, 0]) * [50, 100],
var ball = new Ball(position, vector); ball = new Ball(position, vector);
balls.push(ball); balls.push(ball);
} }
var textItem = new PointText(20, 30);
textItem.fillColor = 'black';
textItem.content = 'Click, drag and release to add balls.'
var lastDelta; var lastDelta;
function onMouseDrag(event) { function onMouseDrag(event) {
lastDelta = event.delta; lastDelta = event.delta;
} }
function onMouseUp(event) { function onMouseUp(event) {
var ball = new Ball(event.point, lastDelta); var ball = new Ball(event.point, lastDelta);
balls.push(ball); balls.push(ball);
lastDelta = null; lastDelta = null;
} }
var boundPath = new Path.Rectangle([-10, -10], [-11, -11]);
boundPath.style = {
strokeColor: 'red',
strokeWidth: 1
};
function onFrame() { function onFrame() {
for (var i = 0, l = balls.length; i < l; i++) for (var i = 0, l = balls.length; i < l; i++)
balls[i].iterate(); balls[i].iterate();
boundPath.bounds = group.bounds;
} }
</script> </script>
</head> </head>
<body> <body>
<p>Click to add circles:</p> <canvas id="canvas" resize keepalive="true"></canvas>
<canvas id="canvas" resize stats keepalive="true"></canvas>
</body> </body>
</html> </html>