| 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>Fancy Brush</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 | ////////////////////////////////////////////////////////////////////////////////
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| 10 | // This script belongs to the following tutorial:
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| 11 | //
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| 12 | // http://scriptographer.org/tutorials/geometry/working-with-mouse-vectors/#adding-brush-stroke-ends
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| 13 |
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| 14 | tool.fixedDistance = 80;
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| 15 |
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| 16 | var path;
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| 17 | var strokeEnds = 6;
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| 18 |
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| 19 | function onMouseDown(event) {
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| 20 | path = new Path();
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| 21 | path.fillColor = event.count % 2 ? 'red' : 'black';
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| 22 | }
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| 23 |
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| 24 | var lastPoint;
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| 25 | function onMouseDrag(event) {
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| 26 | // If this is the first drag event,
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| 27 | // add the strokes at the start:
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| 28 | if (event.count == 1) {
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| 29 | addStrokes(event.middlePoint, event.delta * -1);
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| 30 | } else {
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| 31 | var step = event.delta / 2;
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| 32 | step.angle += 90;
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| 33 |
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| 34 | // The top point: the middle point + the step rotated by 90 degrees:
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| 35 | // -----*
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| 36 | // |
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| 37 | // ------
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| 38 | var top = event.middlePoint + step;
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| 39 |
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| 40 | // The bottom point: the middle point - the step rotated by 90 degrees:
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| 41 | // ------
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| 42 | // |
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| 43 | // -----*
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| 44 | var bottom = event.middlePoint - step;
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| 45 |
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| 46 | path.add(top);
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| 47 | path.insert(0, bottom);
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| 48 | }
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| 49 | path.smooth();
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| 50 |
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| 51 | lastPoint = event.middlePoint;
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| 52 | }
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| 53 |
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| 54 | function onMouseUp(event) {
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| 55 | var delta = event.point - lastPoint;
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| 56 | delta.length = tool.maxDistance;
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| 57 | addStrokes(event.point, delta);
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| 58 | path.closed = true;
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| 59 | path.smooth();
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| 60 | }
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| 61 |
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| 62 | function addStrokes(point, delta) {
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| 63 | var step = delta.rotate(90);
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| 64 | var strokePoints = strokeEnds * 2 + 1;
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| 65 | point -= step / 2;
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| 66 | step /= strokePoints - 1;
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| 67 | for (var i = 0; i < strokePoints; i++) {
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| 68 | var strokePoint = point + step * i;
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| 69 | var offset = delta * (Math.random() * 0.3 + 0.1);
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| 70 | if (i % 2) {
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| 71 | offset *= -1;
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| 72 | }
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| 73 | strokePoint += offset;
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| 74 | path.insert(0, strokePoint);
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| 75 | }
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| 76 | }
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| 77 | </script>
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| 78 | </head>
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| 79 | <body>
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| 80 | <canvas id="canvas" resize></canvas>
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| 81 | </body>
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| 82 | </html> |
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