| 1 | <!DOCTYPE html>
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| 2 | <html>
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| 3 | <head>
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| 4 | <meta charset="UTF-8">
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| 5 | <title>Smoothing</title>
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| 6 | <link rel="stylesheet" href="../css/style.css">
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| 7 | <script type="text/javascript" src="../../dist/paper.js"></script>
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| 8 | <script type="text/paperscript" canvas="canvas">
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| 9 | var width, height, center;
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| 10 | var points = 10;
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| 11 | var smooth = true;
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| 12 | var path = new Path({
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| 13 | fillColor: 'black'
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| 14 | });
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| 15 | var mousePos = view.center / 2;
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| 16 | var pathHeight = mousePos.y;
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| 17 | initializePath();
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| 18 |
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| 19 | function initializePath() {
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| 20 | center = view.center;
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| 21 | width = view.size.width;
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| 22 | height = view.size.height / 2;
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| 23 | path.segments = [];
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| 24 | path.add(view.bounds.bottomLeft);
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| 25 | for (var i = 1; i < points; i++) {
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| 26 | var point = new Point(width / points * i, center.y);
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| 27 | path.add(point);
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| 28 | }
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| 29 | path.add(view.bounds.bottomRight);
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| 30 | path.fullySelected = true;
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| 31 | }
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| 32 |
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| 33 | function onFrame(event) {
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| 34 | pathHeight += (center.y - mousePos.y - pathHeight) / 10;
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| 35 | for (var i = 1; i < points; i++) {
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| 36 | var sinSeed = event.count + (i + i % 10) * 100;
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| 37 | var sinHeight = Math.sin(sinSeed / 200) * pathHeight;
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| 38 | var yPos = Math.sin(sinSeed / 100) * sinHeight + height;
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| 39 | path.segments[i].point.y = yPos;
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| 40 | }
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| 41 | if (smooth)
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| 42 | path.smooth();
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| 43 | }
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| 44 |
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| 45 | function onMouseMove(event) {
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| 46 | mousePos = event.point;
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| 47 | }
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| 48 |
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| 49 | function onMouseDown(event) {
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| 50 | smooth = !smooth;
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| 51 | if (!smooth) {
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| 52 | // If smooth has been turned off, we need to reset
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| 53 | // the handles of the path:
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| 54 | for (var i = 0, l = path.segments.length; i < l; i++) {
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| 55 | var segment = path.segments[i];
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| 56 | segment.handleIn = segment.handleOut = null;
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| 57 | }
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | // Reposition the path whenever the window is resized:
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| 62 | function onResize(event) {
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| 63 | initializePath();
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| 64 | }
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| 65 | </script>
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| 66 | </head>
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| 67 | <body>
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| 68 | <canvas id="canvas" resize></canvas>
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| 69 | </body>
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| 70 | </html> |
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