Simulation of human movement from their places of birth
Built with blockbuilder.org
Last active
December 21, 2017 22:21
-
-
Save Fil/f8069bafd59064e6554314505395787b to your computer and use it in GitHub Desktop.
Déménagement 1
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: mit |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| // Feel free to change or delete any of the code you see in this editor! | |
| var canvas = d3.select("body").append("canvas") | |
| .attr("width", 960) | |
| .attr("height", 500); | |
| var c = canvas.node().getContext("2d"), | |
| r = 1.5; | |
| var s = d3.scaleLinear() | |
| .domain([0,1]) | |
| .range([300,400]) | |
| var nodes = d3.range(8000).map(d => ({})); | |
| d3.forceSimulation(nodes) | |
| .force('saute', function(alpha){ | |
| nodes.forEach(d => { | |
| if (Math.random() < 1e-2) { | |
| var k = d3.randomLogNormal()(); | |
| var alpha = k * 100000; | |
| k = Math.sqrt(k); | |
| d[0] = k * Math.cos(alpha); | |
| d[1] = k * Math.sin(alpha); | |
| d.c = true; | |
| } | |
| }); | |
| }) | |
| .alphaTarget(1e-12) | |
| .on('tick', draw); | |
| function draw() { | |
| c.clearRect(0, 0, 960, 500); | |
| var th = 0; | |
| var sums = []; | |
| nodes.forEach(function(d){ | |
| d[2] = Math.sqrt(d[0]*d[0] + d[1]*d[1]); | |
| var u = Math.floor(s(d[2])); | |
| if (sums[u]) d[3] = (sums[u] = sums[u] - 0.01); | |
| else d[3] = sums[u] = -0.001; | |
| }); | |
| c.fillStyle = 'black'; // d.c ? 'rgba(0,0,0,0.1)' : 'rgba(0,0,0,0.1)'; | |
| c.beginPath(); | |
| nodes.forEach(function(d) { | |
| if (d.c) { | |
| d.x = s(d[0]); | |
| d.y = s(d[1]); | |
| } else { | |
| var k = 0.2 * Math.sqrt(th / nodes.length), alpha = th; | |
| d.x = s(k * Math.cos(alpha)); | |
| d.y = s(k * Math.sin(alpha)); | |
| th++; | |
| } | |
| c.moveTo(d.x + r, d.y); | |
| c.arc(d.x, d.y, r, 0, 2 * Math.PI); | |
| }); | |
| c.fill(); | |
| c.beginPath(); | |
| c.moveTo(s(0.2), s(0)); | |
| c.arc(s(0), s(0), s(0.2)-s(0), 0, 2 * Math.PI); | |
| c.stroke(); | |
| c.beginPath(); | |
| c.fillStyle = 'grey'; // d.c ? 'rgba(0,0,0,0.1)' : 'rgba(0,0,0,0.1)'; | |
| nodes.forEach(function(d) { | |
| if (d.c) { | |
| d.x = s(d[2]); | |
| d.y = 180+s(d[3]); | |
| c.moveTo(d.x + r, d.y); | |
| c.arc(d.x, d.y, r, 0, 2 * Math.PI); | |
| } | |
| }); | |
| c.fill(); | |
| } | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment