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d3.js spiral
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| <!DOCTYPE html> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://underscorejs.org/underscore-min.js"></script> | |
| <script src="http://coffeescript.org/extras/coffee-script.js"></script> | |
| <script type="text/coffeescript"> | |
| x = 1 | |
| data = _.map([1..36], -> x *= 0.892) | |
| squares = d3.select('body').append('svg') | |
| .attr('width', innerWidth) | |
| .attr('height', innerHeight) | |
| .selectAll("g") | |
| .data(data) | |
| .enter() | |
| .append("svg:g") | |
| .classed("square", true) | |
| squares.append("svg:rect") | |
| .attr("rx", 1) | |
| .attr("ry", 1) | |
| .attr("x", -2) | |
| .attr("y", -2) | |
| .attr("width", 4) | |
| .attr("height", 4) | |
| .attr("transform", (d) -> "scale(#{d*innerWidth})") | |
| .style("fill", (d,i) -> ["#eeeeee", "#fff"][i%2]) | |
| t = 0 | |
| setInterval( | |
| -> | |
| t = if t >= 1200 then 0 else t + 1 | |
| alpha = 5*360*t/1200 | |
| squares | |
| .attr("transform", (d, i) -> | |
| cx = innerWidth/2 + 36*Math.cos(-alpha/5) | |
| cy = innerHeight/2 + 36*Math.sin(-alpha/5) | |
| "translate(#{[cx, cy]})rotate(#{alpha*i})") | |
| , 110) | |
| </script> | |
| </body> |
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