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generative-plotter-thingies
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use meaningful file names, prepare parametrization

master
Fr3deric 6 years ago
parent
ea65fc493b
commit
aae5ceb5a1
3 changed files with 116 additions and 115 deletions
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  1. 115
      chaostest/chaostest3.html
  2. 52
      chaostest/connected-lines.html
  3. 64
      chaostest/connected-lines.js

115
chaostest/chaostest3.html
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<title>JavaScript <=> PaperScript example</title>
<code mode="text/html">
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="paper.js"></script>
<script type="text/paperscript" canvas="canvas">
var xstart = Math.random();
var ystart = Math.random();
//var xstart = 0.976119763841021;
//var ystart = 0.06095897568349018;
//var xstart = 0.981709002734148;
//var ystart = 0.7482912451397156;
//var xstart = 0.01408766142248663
//var ystart = 0.5826524694499656;
var scale = 500;
var num_steps = 7;
var fac = 0.0005;
var num_steps = 5;
var fac = 0.05;
var lines = [];
for(var i=0; i<2; i++) {
var x = xstart + i*fac;
var y = ystart + i*fac;
var path = new Path({strokeWidth: 1, strokeColor: 'black'});
for(var s=0; s<num_steps; s++) {
x = (4*x*(1-x)) % 1;
y = (x+y) % 1;
var p = new Point(x*scale, y*scale);
path.add(p);
console.log(p);
}
lines.push(path);
}
lines[0].strokeWidth = 5;
lines[1].strokeWidth = 0;
//lines[1].fullySelected = true;
for(var i=0; i<num_steps-1; i++) {
var o0start = lines[0].getOffsetOf(lines[0].segments[i].point);
var o0end = lines[0].getOffsetOf(lines[0].segments[i+1].point);
var o1start = lines[1].getOffsetOf(lines[1].segments[i].point);
var o1end = lines[1].getOffsetOf(lines[1].segments[i+1].point);
var num_steps2_0 = (o0end - o0start) / 7;
var num_steps2_1 = (o1end - o1start) / 7;
var num_steps2 = Math.min(num_steps2_0, num_steps2_1);
console.log(num_steps2);
for(var j=0; j<num_steps2; j++) {
var p0 = lines[0].getPointAt(o0start + (o0end-o0start) * (j/num_steps2));
var p1 = lines[1].getPointAt(o1start + (o1end-o1start) * (j/num_steps2));
var path = new Path.Line({
from: p0, to: p1,
strokeWidth: 2,
strokeColor: 'black'
});
if(path.length < 5) {
path.removeSegments();
delete path;
}
}
}
globals.get_svg = function() {
return project.exportSVG({asString: true});
}
console.log("start: ", xstart, ystart);
</script>
<script type="text/javascript">
//document.addEventListener('DOMContentLoaded', function() {
window.globals = {}
window.onload = function() {
/*
draw();
document.getElementById('redraw').addEventListener('click', function() {
draw();
});
*/
paper.install(window);
console.log(window.globals);
document.getElementById('download-svg').addEventListener('click', function() {
var svgdata = 'data:image/svg+xml;utf8,' + encodeURIComponent(window.globals.get_svg());
var a = document.createElement('a');
a.download = 'export.svg';
a.href = svgdata;
document.body.appendChild(a);
a.click();
});
}
</script>
</head>
<body>
<button id="download-svg">download svg</button>
<canvas id="canvas" style="width: 500px; height: 500px;" resize></canvas>
</body>
</html>

52
chaostest/connected-lines.html
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<title>JavaScript <=> PaperScript example</title>
<code mode="text/html">
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="paper.js"></script>
<script type="text/javascript" src="connected-lines.js" canvas="canvas"></script>
<script type="text/paperscript" canvas="canvas">
function draw() {
paper.project.clear();
var grp = connected_lines();
grp.scale(500, new Point(0,0));
}
globals.draw = draw;
globals.get_svg = function() {
return project.exportSVG({asString: true});
}
</script>
<script type="text/javascript">
window.globals = {}
window.onload = function() {
paper.install(window);
window.globals.draw();
document.getElementById('download-svg').addEventListener('click', function() {
var svgdata = 'data:image/svg+xml;utf8,' + encodeURIComponent(window.globals.get_svg());
var a = document.createElement('a');
a.download = 'export.svg';
a.href = svgdata;
document.body.appendChild(a);
a.click();
});
document.getElementById('draw').addEventListener('click', function() {
window.globals.draw();
});
}
</script>
</head>
<body>
<canvas id="canvas" style="width: 500px; height: 500px;" resize></canvas>
<hr>
<button id="download-svg">download svg</button>
<button id="draw">draw</button>
</body>
</html>

64
chaostest/connected-lines.js
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function connected_lines_get_rnd_params() {
return {
start: new Point(Math.random(), Math.random()),
offs: new Point(0.05, 0.05),
num_steps: 5,
};
}
function connected_lines(params) {
if(typeof params == 'undefined') {
var params = connected_lines_get_rnd_params();
}
var lines = [];
for(var i=0; i<2; i++) {
var x = params.start.x + i*params.offs.x;
var y = params.start.y + i*params.offs.y;
var path = new paper.Path({strokeWidth: 5, strokeColor: 'black'});
for(var s=0; s<params.num_steps; s++) {
x = (4*x*(1-x)) % 1;
y = (x+y) % 1;
var p = new paper.Point(x, y);
path.add(p);
}
lines.push(path);
}
var conlines = new paper.Group();
for(var i=0; i<params.num_steps-1; i++) {
// TODO use less variables?
var o0start = lines[0].getOffsetOf(lines[0].segments[i].point);
var o0end = lines[0].getOffsetOf(lines[0].segments[i+1].point);
var o1start = lines[1].getOffsetOf(lines[1].segments[i].point);
var o1end = lines[1].getOffsetOf(lines[1].segments[i+1].point);
// TODO param: conn lines density
var num_steps2_0 = (o0end - o0start) / (7/500);
var num_steps2_1 = (o1end - o1start) / (7/500);
var num_steps2 = Math.min(num_steps2_0, num_steps2_1);
for(var j=0; j<num_steps2; j++) {
var p0 = lines[0].getPointAt(o0start + (o0end-o0start) * (j/num_steps2));
var p1 = lines[1].getPointAt(o1start + (o1end-o1start) * (j/num_steps2));
var path = new paper.Path.Line({
from: p0, to: p1,
strokeWidth: 2,
strokeColor: 'black'
});
// TODO param: conn lines min length
if(path.length < 0.001) {
path.removeSegments();
delete path;
} else {
conlines.addChild(path);
}
}
}
lines[1].removeSegments();
delete lines[1];
return new paper.Group([lines[0], conlines]);
}
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