Last active
October 3, 2015 18:38
-
-
Save ghing/2505876 to your computer and use it in GitHub Desktop.
Drawing a spider web with d3
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
| <html> | |
| <head> | |
| <title>Webmaking</title> | |
| <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> | |
| <script type="text/javascript" src="http://d3js.org/d3.v2.min.js"></script> | |
| <script type="text/javascript"> | |
| $(document).ready(function() { | |
| function getPoints(radius, segments, levels) { | |
| points = { | |
| all: [], | |
| byLevel: [], | |
| bySegment: [], | |
| }; | |
| for (i = 0; i < levels; i++) { | |
| r = (radius/levels) * (i + 1); | |
| points.byLevel[i] = [] | |
| for (j = 0; j < segments; j++) { | |
| if (points.bySegment[j] == undefined) { | |
| points.bySegment[j] = []; | |
| } | |
| theta = ((2 * Math.PI) / segments) * j; | |
| point = { | |
| r: r, | |
| theta: theta, | |
| x: r * Math.cos(theta), | |
| y: r * Math.sin(theta), | |
| level: i | |
| }; | |
| points.all.push(point); | |
| points.byLevel[i].push(point); | |
| points.bySegment[j].push(point); | |
| } | |
| } | |
| return points; | |
| } | |
| var svg = d3.select('#web').append('svg').style('width', '100%').style('height', '100%'), | |
| vis = svg.append('g'), | |
| width = 500, | |
| segments = 8, | |
| levels = 4, | |
| points = getPoints(width / 2, segments, levels); | |
| vis.attr("transform", "translate(" + $(window).width() / 2 + ", " + $(window).height() / 2 + ")"); | |
| vis.selectAll("circle") | |
| .data(points.all) | |
| .enter().append("circle") | |
| .attr("cx", function(d) { | |
| return d.x; | |
| }) | |
| .attr("cy", function(d) { | |
| return d.y; | |
| }) | |
| .attr("r", 5) | |
| .attr("class", function(d) { | |
| return "level-" + d.level; | |
| }); | |
| for (level = 0; level < levels; level++) { | |
| for (j = 0; j < segments; j++) { | |
| var point = points.byLevel[level][j] | |
| var nextIdx = j + 1 < segments ? j + 1 : 0; | |
| var nextPoint = points.byLevel[level][nextIdx]; | |
| vis.append("path") | |
| .attr("d", "M " + point.x + " " + point.y + " L " + nextPoint.x + " " + nextPoint.y) | |
| .style("stroke", "#000"); | |
| } | |
| } | |
| for (segment = 0; segment < segments; segment++) { | |
| console.debug(points.bySegment[segment]); | |
| var start = points.bySegment[segment][0]; | |
| var end = points.bySegment[segment][levels - 1]; | |
| vis.append("path") | |
| .attr("d", "M " + start.x + " " + start.y + " L " + end.x + " " + end.y) | |
| .style("stroke", "#000"); | |
| } | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <div id="web"></div> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Could you please fix the broken link to d3.js, using http://d3js.org/d3.v2.min.js ? Thanks!