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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
| <style type="text/css"> | |
| body { | |
| background: #333; | |
| } | |
| rect { | |
| stroke-width: 2.5px; | |
| } | |
| /* | |
| .square:nth-child(2n + 1) rect { | |
| } | |
| */ | |
| </style> | |
| </head> | |
| <body> | |
| <svg></svg> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.6.0"></script> | |
| <script type="text/javascript"> | |
| var w = 960, | |
| h = 500, | |
| start = Date.now(); | |
| var rings = [ ]; | |
| var lines = [ ]; | |
| var n = 25; | |
| var m = 70; | |
| for (i in d3.range(n)) | |
| { | |
| if(i < 3) | |
| var speed = (i-3) * 1e-2; | |
| else | |
| var speed = (i-2) * 1e-2; | |
| //var speed = 50e-2 / (i + 1) | |
| //var speed = .001 * n / (.5*i+1) | |
| var speed = .001 * i * 4; | |
| var data = d3.range(m) | |
| lines.push({ | |
| //radius: 65*i, | |
| width: 5, | |
| height: 15, | |
| speed: speed, | |
| //speed: speed_scale(i), | |
| index: i, | |
| data: data | |
| }) | |
| } | |
| var xscale = d3.scale.linear() | |
| .domain([0,m]) | |
| .range([0, w]) | |
| var omega = -.22 | |
| function line_maker( data, speed ) | |
| { | |
| var freq = Math.PI*.4 + 3 * omega * data.index // * 3000 | |
| var svgline = d3.svg.line() | |
| .x(function(d,i) | |
| { | |
| return xscale(d); | |
| }) | |
| .y(function(d,i) | |
| { | |
| var theta = freq * d/m * Math.PI * 4 | |
| //console.log("sin", Math.sin(theta), d) | |
| var y = data.height * (Math.sin(theta + (n-data.index) * .1 * speed * .18 )); | |
| //console.log ("y", y) | |
| return y | |
| }) | |
| .interpolate("basis") | |
| return svgline(data.data); | |
| } | |
| var spacing = 26; | |
| function lineEnter(d, i) { | |
| //console.log("line enter", d) | |
| d3.select(this).selectAll("path.path") | |
| .data([d]) | |
| .enter() | |
| .append("svg:path") | |
| .attr("class", "path") | |
| //.attr("transform", function(_, i) { return "translate(" + [0, h - spacing * d.index] + ")"; }) | |
| .attr("d", function(d,i) { | |
| return line_maker( d, 0 ) | |
| } | |
| ) | |
| .attr("stroke-width", function(e,i) { return e.width;}) | |
| .attr("stroke", "#fff") | |
| .attr("fill", "none") | |
| update_spacing() | |
| } | |
| var svg = d3.select("svg") | |
| .attr("width", w) | |
| .attr("height", h) | |
| .append("svg:g") | |
| //.attr("transform", "translate(" + w / 2 + "," + h / 2 + ")scale(.6)"); | |
| var line = svg.selectAll("g.line") | |
| .data(lines) | |
| .enter().append("svg:g") | |
| .attr("class", "line") | |
| .each(lineEnter); | |
| var pause = false; | |
| var sm = .39 | |
| function update_spacing() | |
| { | |
| var th = spacing * n; | |
| var hscale = d3.scale.linear() | |
| .domain([0, n]) | |
| .range([0, h]) | |
| //console.log("th", th, hscale(99)) | |
| console.log("spacing", spacing) | |
| d3.selectAll("g.line path") | |
| .attr("transform", function(d, i) { | |
| //console.log("h",h, spacing, d.index); | |
| //return "translate(" + [0, th - spacing * d.index] + ")"; | |
| return "translate(" + [0, h/2 + th / 2 - spacing * d.index] + ")"; | |
| }) | |
| } | |
| var color = d3.scale.linear() | |
| .domain([-1, 1]) | |
| .interpolate(d3.interpolateRgb) | |
| .range(['#fff', '#000']) | |
| var opacity = d3.scale.linear() | |
| .domain([0, n]) | |
| .range([1, .4]) | |
| b = 1; | |
| d3.timer(function() { | |
| if( pause ) return false; | |
| var elapsed = Date.now() - start | |
| var damp = .3 | |
| rotate = function(d,i) { | |
| var speed = sm * d.speed * elapsed * .1 | |
| return "rotate(" + speed + ")"; | |
| }; | |
| line = d3.selectAll("g.line path") | |
| .attr("d", function(d,i) { | |
| //var speed = a * d.speed * elapsed + .01 * d.index | |
| var speed = sm * .08 * elapsed + d.index * 4 | |
| return line_maker( d, speed ) | |
| }) | |
| .attr("stroke-opacity", function(d,i) { return opacity(d.index);}) | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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