Created
September 1, 2012 01:09
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Wild Spiral
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> | |
| <title>Archimedean Spiral</title> | |
| <script type="text/javascript" src="http://d3js.org/d3.v2.js"></script> | |
| <style> | |
| body { | |
| font-family: 'Lucida Grande', 'Lucida Sans Unicode', 'Geneva', 'Verdana', sans-serif; | |
| margin: 40px; | |
| } | |
| .axis path { | |
| fill: none; | |
| stroke: #999; | |
| stroke-dasharray: 2 3; | |
| } | |
| .axis text { | |
| font-size: 13px; | |
| stroke: #222; | |
| } | |
| text.title { | |
| font-size: 24px; | |
| } | |
| circle.tick { | |
| fill: #f3f3f3; | |
| stroke: #999; | |
| stroke-dasharray: 2 3; | |
| } | |
| path.spiral { | |
| fill: none; | |
| stroke-width: 3px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <script type="text/javascript" src="spiral.js"></script> | |
| </body> | |
| </html> |
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| var width = 400, | |
| height = 430 | |
| num_axes = 8, | |
| tick_axis = 1, | |
| start = 0 | |
| end = 2; | |
| var theta = function(r) { | |
| return -2*Math.PI*r; | |
| }; | |
| var arc = d3.svg.arc() | |
| .startAngle(0) | |
| .endAngle(2*Math.PI); | |
| var radius = d3.scale.linear() | |
| .domain([start, end]) | |
| .range([0, d3.min([width,height])/2-20]); | |
| var angle = d3.scale.linear() | |
| .domain([0,num_axes]) | |
| .range([0,360]) | |
| var svg = d3.select("#chart").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + width/2 + "," + (height/2+8) +")"); | |
| var pieces = d3.range(start, end+0.001, (end-start)/1000); | |
| var spiral = d3.svg.line.radial() | |
| .interpolate("cardinal") | |
| .angle(theta) | |
| .radius(radius); | |
| svg.append("text") | |
| .text("And there was much rejoicing!") | |
| .attr("class", "title") | |
| .attr("x", 0) | |
| .attr("y", -height/2+16) | |
| .attr("text-anchor", "middle") | |
| svg.selectAll("circle.tick") | |
| .data(d3.range(end,start,(start-end)/4)) | |
| .enter().append("circle") | |
| .attr("class", "tick") | |
| .attr("cx", 0) | |
| .attr("cy", 0) | |
| .attr("r", function(d) { return radius(d); }) | |
| svg.selectAll(".axis") | |
| .data(d3.range(num_axes)) | |
| .enter().append("g") | |
| .attr("class", "axis") | |
| .attr("transform", function(d) { return "rotate(" + -angle(d) + ")"; }) | |
| .call(radial_tick) | |
| .append("text") | |
| .attr("y", radius(end)+13) | |
| .text(function(d) { return angle(d) + "°"; }) | |
| .attr("text-anchor", "middle") | |
| .attr("transform", function(d) { return "rotate(" + -90 + ")" }) | |
| svg.selectAll(".spiral") | |
| .data([pieces]) | |
| .enter().append("path") | |
| .attr("class", "spiral") | |
| .attr("d", spiral) | |
| .attr("transform", function(d) { return "rotate(" + 90 + ")" }); | |
| function radial_tick(selection) { | |
| selection.each(function(axis_num) { | |
| d3.svg.axis() | |
| .scale(radius) | |
| .ticks(5) | |
| .tickValues( axis_num == tick_axis ? null : []) | |
| .orient("bottom")(d3.select(this)) | |
| d3.select(this) | |
| .selectAll("text") | |
| .attr("text-anchor", "bottom") | |
| .attr("transform", "rotate(" + angle(axis_num) + ")") | |
| }); | |
| } | |
| function awesome_transition(t) { | |
| var k = t/2000*Math.sin(t/1000) + 1; | |
| var theta = function(r) { | |
| return k*-2*Math.PI*r; | |
| }; | |
| spiral.angle(theta); | |
| svg.select(".spiral") | |
| .attr("d", spiral) | |
| .style("stroke", "rgba(" + Math.round(255*Math.sin(k)) + "," + Math.round(255*Math.cos(k)) + ",0,1)"); | |
| svg.attr("transform", "translate(200,233) rotate(" + (50*k) + ")"); | |
| }; | |
| d3.timer( awesome_transition ); |
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