Created
November 20, 2011 07:37
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4 circles in d3.js
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Spiral</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script> | |
| <style type="text/css"> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var w = 500; | |
| var h = 500; | |
| var r1 = 90; | |
| var r2 = 150; | |
| var r3 = 220; | |
| var r4 = 290; | |
| //setup svg canvas | |
| svg = d3.select("body") | |
| .append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h) | |
| .attr("id", "spiral") | |
| svg.append("svg:rect") | |
| .attr("class", "background_rect") | |
| .attr("width", "100%") | |
| .attr("height", "100%") | |
| .attr("stroke", "#000") | |
| .attr("stroke-width", 1) | |
| .attr("fill", "#888") | |
| chart = svg.append("svg:g") | |
| .attr("class", "base_group") | |
| .attr("transform", "translate(" + [w/2,h/2] + ")scale(.5 .5)"); | |
| var make_circle = function(r,n,offset, step) | |
| { | |
| data = [] | |
| for(i = 0; i < n; i++) | |
| { | |
| theta = offset + i * 2 * Math.PI / n | |
| //a = offset + step * d.index; | |
| data.push({x: r * Math.cos(theta), y: r * Math.sin(theta), angle: theta, index: i }) | |
| } | |
| return data | |
| } | |
| var circle_factory = function(name, data, offset) | |
| { | |
| var boxes = chart.selectAll("g." + name) | |
| .data(data) | |
| .enter().append("svg:g") | |
| .attr("class", name) | |
| .append("svg:rect") | |
| .attr("width", 20) | |
| .attr("height", 20) | |
| .attr("stroke", function(d,i){ | |
| if(d.index % 2 == 1) { | |
| return "#fff" | |
| } | |
| return "#000" | |
| }) | |
| .attr("stroke-width", 2) | |
| .attr("fill", "none") | |
| .attr("transform", function(d,i) { | |
| a = offset + step * d.index; | |
| return "translate(" + [d.x ,d.y] + ")rotate(" + a + " 10 10)" | |
| }) | |
| } | |
| rot = 0 | |
| n = 18 | |
| data1 = make_circle(r1, n, rot) | |
| step = 20 | |
| offset = 15; | |
| circle_factory("one", data1, offset, step) | |
| n = 30 | |
| data2 = make_circle(r2, n, rot) | |
| step = 12 | |
| offset = -15 | |
| circle_factory("two", data2, offset, step) | |
| n = 45 | |
| data3 = make_circle(r3, n, rot) | |
| step = 8 | |
| offset = 15; | |
| circle_factory("three", data3, offset, step) | |
| n = 60 | |
| data4 = make_circle(r4, n, rot) | |
| step = 6 | |
| offset = -15; | |
| circle_factory("four", data4, offset, step) | |
| </script> | |
| </body> | |
| </html> |
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