-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindex.html
96 lines (69 loc) · 3.16 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Magic Sin Wave</title>
<style>
canvas { background: #000; }
body { overflow: hidden; margin: 0; padding: 0; }
</style>
<script type="text/javascript" src="paper.js"></script>
<script type="text/paperscript" canvas="canvas">
var mouse = new Point;
function onMouseMove(event){
mouse = event.point;
}
function onMouseDown(event){
sinWave.selected = !sinWave.selected;
}
var sinWave = (function(){
var path = new Path({ strokeColor: '#0f0', strokeWidth: 1 });
var numPoints = 96;
var numCurves = 8;
var distance = view.size.width / numPoints;
var height = view.size.height;
var offsetHeight = height/2;
var waveHeight = height/8;
var mouseIntensity = 10000;
var mouseProximityWeight = 2.75;
var maxStrokeWidth = 10;
var multiplier = Math.floor(maxStrokeWidth/2);
var adder = Math.ceil(maxStrokeWidth/2);
var originalSpots = [];
var upperBounds = [view.size.width, view.size.height ];
var lowerBounds = [ 0, 0 ];
path.init = function(){
var divisor = numPoints/numCurves;
for ( var i = 0; i < numPoints; i ++ ){
var radians = Math.PI * i/divisor;
var sinus = Math.sin( radians ) * waveHeight;
var originalSpot = new Point(distance * i, sinus + offsetHeight);
var point = new Point(originalSpot);
path.add(point);
originalSpots.push(originalSpot);
}
};
path.onFrame = function(event){
this.segments.forEach(function(segment, index){
var originalSpot = originalSpots[index];
var goToOriginalSpot = originalSpot - segment.point;
goToOriginalSpot = goToOriginalSpot.normalize();
var goAwayFromMouse = segment.point - mouse;
goAwayFromMouse *= mouseIntensity / Math.pow( goAwayFromMouse.length, mouseProximityWeight);
var newLocation = segment.point + goAwayFromMouse + goToOriginalSpot;
segment.point = Point.max( lowerBounds, Point.min( newLocation, upperBounds )).round();
});
path.strokeWidth = adder + Math.sin(event.time) * multiplier;
path.strokeColor.hue++;
path.smooth();
}
path.selected = true;
return path;
})();
sinWave.init();
</script>
</head>
<body>
<canvas resize="true" id="canvas"></canvas>
</body>
</html>