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The Swiss Army Knife of Vector Graphics Scripting
80 lines (68 loc) • 2.33 kB
HTML
<html>
<head>
<meta charset="UTF-8">
<title>Space</title>
<link rel="stylesheet" href="../css/style.css">
<script type="text/javascript" src="../../dist/paper-full.js"></script>
<script type="text/paperscript" canvas="canvas">
// The amount of symbol we want to place;
var count = 150;
project.currentStyle = {
fillColor: 'white'
};
// Place the instances of the symbol:
for (var i = 0; i < count; i++) {
// The center position is a random point in the view:
var center = Point.random() * view.size;
var scale = (i + 1) / count;
var path = new Shape.Circle(center, 5 * scale);
path.data.vector = new Point({
angle: Math.random() * 360,
length : scale * Math.random() / 5
});
}
var vector = new Point({
angle: 45,
length: 0
});
var mouseVector = vector.clone();
function onMouseMove(event) {
mouseVector = view.center - event.point;
}
// The onFrame function is called up to 60 times a second:
function onFrame(event) {
vector = vector + (mouseVector - vector) / 30;
// Run through the active layer's children list and change
// the position of the placed symbols:
for (var i = 0; i < count; i++) {
var item = project.activeLayer.children[i];
var size = item.bounds.size;
var length = vector.length / 10 * size.width / 10;
item.position += vector.normalize(length) + item.data.vector;
keepInView(item);
}
}
function keepInView(item) {
var position = item.position;
var itemBounds = item.bounds;
var bounds = view.bounds;
if (itemBounds.left > bounds.width) {
position.x = -item.bounds.width;
}
if (position.x < -itemBounds.width) {
position.x = bounds.width + itemBounds.width;
}
if (itemBounds.top > view.size.height) {
position.y = -itemBounds.height;
}
if (position.y < -itemBounds.height) {
position.y = bounds.height + itemBounds.height / 2;
}
}
</script>
</head>
<body>
<canvas id="canvas" resize hidpi="off" style="background:black"></canvas>
</body>
</html>