comparison between 15-point line transition and n-point transition
Created
June 7, 2012 02:59
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N-Point Comparison to 15-Point
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8' /> | |
| <title>D3 Multiple-Point Line Transition</title> | |
| <style type='text/css'> | |
| /*<![CDATA[*/ | |
| path { | |
| stroke: black; | |
| stroke-width: 2px; | |
| fill: transparent; | |
| } | |
| hgroup * { | |
| position: absolute; | |
| z-index: -1; | |
| font-family: 'Helvetica Neue', Helvetica, sans-serif; | |
| } | |
| h1 { | |
| font-weight: 100; | |
| } | |
| h1:nth-of-type(1) { | |
| top: 75px; | |
| } | |
| h4 { | |
| font-size: 13px; | |
| font-weight: 400; | |
| top: 120px; | |
| } | |
| h1:nth-of-type(2) { | |
| top: 350px; | |
| } | |
| /*]]>*/ | |
| </style> | |
| </head> | |
| <body> | |
| <hgroup> | |
| <h1>N-Point Line</h1> | |
| <h4>(between 8 and 15)</h4> | |
| <h1>15-Point Line</h1> | |
| </hgroup> | |
| <script src='http://d3js.org/d3.v2.js?2.9.1'></script> | |
| <script type='text/javascript'> | |
| //<![CDATA[ | |
| paths = false; | |
| var update = function(type) { | |
| if (type === 'normal') { | |
| var n = 15, | |
| range = [500, 251]; | |
| } else { // 'multi' | |
| var n = Math.floor(Math.random() * (15 - 8 + 1)) + 8, | |
| range = [249, 0] | |
| } | |
| data = d3.range(n).map(d3.random.normal(0, 0.2)); | |
| x = d3.scale.linear() | |
| .domain([0, n-1]) | |
| .range([0, 960]); | |
| y = d3.scale.linear() | |
| .domain([d3.min(data), d3.max(data)]) | |
| .range(range); | |
| line = d3.svg.line() | |
| .interpolate('basis') | |
| // x loses scope for some reason, this is a cheap fix | |
| .x(function(d,i) { return x.domain([0, n-1])(i); }) | |
| .y(y); | |
| if (window.paths) { | |
| window[type+'Path'] | |
| .data([data]) | |
| .transition() | |
| .duration(200) | |
| .attr('d', line); | |
| } | |
| } | |
| var create = function(type) { | |
| update(type); | |
| return svg.selectAll('#'+type) | |
| .data([data]) | |
| .enter() | |
| .append('svg:path') | |
| .attr('id', type) | |
| .attr('d', line); | |
| } | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', 960) | |
| .attr('height', 500); | |
| onInterval = function() { | |
| if (!window.paths) { | |
| window.multiPath = create('multi'); | |
| window.normalPath = create('normal'); | |
| window.paths = true; | |
| } else { | |
| update('multi'); | |
| update('normal'); | |
| } | |
| }; | |
| setInterval(onInterval, 750); | |
| //]]> | |
| </script> | |
| </body> | |
| </html> |
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