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116 lines
2.9 KiB
116 lines
2.9 KiB
6 years ago
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<title>JavaScript <=> PaperScript example</title>
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<code mode="text/html">
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<!DOCTYPE html>
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<html>
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<head>
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<script type="text/javascript" src="paper.js"></script>
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<script type="text/paperscript" canvas="canvas">
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var xstart = Math.random();
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var ystart = Math.random();
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//var xstart = 0.976119763841021;
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//var ystart = 0.06095897568349018;
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//var xstart = 0.981709002734148;
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//var ystart = 0.7482912451397156;
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//var xstart = 0.01408766142248663
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//var ystart = 0.5826524694499656;
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var scale = 500;
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var num_steps = 7;
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var fac = 0.0005;
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var num_steps = 5;
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var fac = 0.05;
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var lines = [];
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for(var i=0; i<2; i++) {
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var x = xstart + i*fac;
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var y = ystart + i*fac;
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var path = new Path({strokeWidth: 1, strokeColor: 'black'});
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for(var s=0; s<num_steps; s++) {
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x = (4*x*(1-x)) % 1;
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y = (x+y) % 1;
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var p = new Point(x*scale, y*scale);
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path.add(p);
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console.log(p);
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}
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lines.push(path);
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}
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lines[0].strokeWidth = 5;
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lines[1].strokeWidth = 0;
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//lines[1].fullySelected = true;
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for(var i=0; i<num_steps-1; i++) {
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var o0start = lines[0].getOffsetOf(lines[0].segments[i].point);
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var o0end = lines[0].getOffsetOf(lines[0].segments[i+1].point);
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var o1start = lines[1].getOffsetOf(lines[1].segments[i].point);
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var o1end = lines[1].getOffsetOf(lines[1].segments[i+1].point);
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var num_steps2_0 = (o0end - o0start) / 7;
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var num_steps2_1 = (o1end - o1start) / 7;
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var num_steps2 = Math.min(num_steps2_0, num_steps2_1);
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console.log(num_steps2);
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for(var j=0; j<num_steps2; j++) {
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var p0 = lines[0].getPointAt(o0start + (o0end-o0start) * (j/num_steps2));
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var p1 = lines[1].getPointAt(o1start + (o1end-o1start) * (j/num_steps2));
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var path = new Path.Line({
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from: p0, to: p1,
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strokeWidth: 2,
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strokeColor: 'black'
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});
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if(path.length < 5) {
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path.removeSegments();
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delete path;
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}
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}
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}
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globals.get_svg = function() {
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return project.exportSVG({asString: true});
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}
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console.log("start: ", xstart, ystart);
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</script>
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<script type="text/javascript">
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//document.addEventListener('DOMContentLoaded', function() {
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window.globals = {}
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window.onload = function() {
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/*
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draw();
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document.getElementById('redraw').addEventListener('click', function() {
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draw();
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});
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*/
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paper.install(window);
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console.log(window.globals);
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document.getElementById('download-svg').addEventListener('click', function() {
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var svgdata = 'data:image/svg+xml;utf8,' + encodeURIComponent(window.globals.get_svg());
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var a = document.createElement('a');
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a.download = 'export.svg';
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a.href = svgdata;
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document.body.appendChild(a);
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a.click();
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});
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}
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</script>
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</head>
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<body>
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<button id="download-svg">download svg</button>
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<canvas id="canvas" style="width: 500px; height: 500px;" resize></canvas>
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</body>
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</html>
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