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Add BouncingCircles.html example of Group#getBounds().

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Jonathan Puckey 2011-02-17 00:35:10 +01:00
parent c0884473b5
commit 66b9b28394
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examples/Scripts/BouncingBalls.html Normal file
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Example</title>
<script type="text/javascript" src="../../lib/Bootstrap.js"></script>
<script type="text/javascript" src="../../src/Paper.js"></script>
<script type="text/javascript" src="../../src/tool/ToolEvent.js"></script>
<script type="text/javascript" src="../../src/tool/ToolHandler.js"></script>
<script type="text/javascript" src="../../src/tool/Tool.js"></script>
<script type="text/javascript" src="../../src/basic/Point.js"></script>
<script type="text/javascript" src="../../src/basic/Rectangle.js"></script>
<script type="text/javascript" src="../../src/basic/Size.js"></script>
<script type="text/javascript" src="../../src/basic/Matrix.js"></script>
<script type="text/javascript" src="../../src/document/Doc.js"></script>
<script type="text/javascript" src="../../src/item/Item.js"></script>
<script type="text/javascript" src="../../src/item/Group.js"></script>
<script type="text/javascript" src="../../src/item/Layer.js"></script>
<script type="text/javascript" src="../../src/item/PathStyle.js"></script>
<script type="text/javascript" src="../../src/path/Segment.js"></script>
<script type="text/javascript" src="../../src/path/PathItem.js"></script>
<script type="text/javascript" src="../../src/path/Path.js"></script>
<script>
var count = 0, balls = [];
var ball;
var doc, amount = 50, group;
window.onload = function() {
var Ball = Base.extend({
initialize: function(point, vector) {
this.vector = vector;
this.point = point;
this.dampen = 0.4;
this.gravity = 3;
this.bounce = -0.8;
this.radius = 50 * Math.random() + 10;
this.path = new Path.Circle(this.point, this.radius);
this.path.fillColor = 'black';
this.path.strokeColor = 'white';
this.path.strokeWidth = 3;
group.appendTop(this.path);
},
iterate: function() {
this.vector.y += this.gravity;
var pre = this.point.add(this.vector);
if(pre.x < this.radius || pre.x > doc.size.width - this.radius)
this.vector.x *= -this.dampen;
if(pre.y < this.radius || pre.y > doc.size.height - this.radius)
this.vector.y *= this.bounce;
this.point = this.point.add(this.vector);
if(Math.abs(this.vector.x) < 3) {
this.vector.x = Math.random() * 100 - 50;
this.vector.y = Math.random() * 50;
}
this.path.position = this.point;
}
});
var canvas = document.getElementById('canvas');
doc = new Doc(canvas);
group = new Group();
var lastPoint;
tool = new Tool({
onMouseDown: function(event) {
lastPoint = event.point;
},
onMouseDrag: function(event) {
lastPoint = event.point;
},
onMouseUp: function(event) {
balls.push(new Ball(event.point, lastPoint.subtract(event.point)));
}
});
setInterval(draw, 30);
}
var boundPath;
function draw() {
for(var i = 0, l = balls.length; i < l; i++) {
balls[i].iterate();
}
if(balls.length) {
if(boundPath)
boundPath.remove();
boundPath = new Path.Rectangle(group.bounds);
boundPath.strokeColor = 'black';
boundPath.strokeWidth = 5;
boundPath.strokeCap = 'round';
doc.redraw();
}
}
</script>
</head>
<body>
<p>Click to add circles:</p>
<canvas id='canvas' width=1024 height=768></canvas>
</body>