Created
October 3, 2016 23:48
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Curve - timepiece
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| license: cc-by-nc-4.0 | |
| border: no |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Curve Clock</title> | |
| </head> | |
| <body> | |
| <canvas class="clock curve-clock-2"></canvas> | |
| <style type="text/css"> | |
| body { | |
| margin: 0; | |
| } | |
| .curve-clock { | |
| background: #fff; | |
| } | |
| </style> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script type="text/javascript"> | |
| (function() { | |
| 'use strict' | |
| var width = 960, height = 500 | |
| var size = Math.min(width, height) | |
| var radius = size * 0.4 | |
| var tau = Math.PI * 2 | |
| var r1 = Math.sqrt(0.9) * radius | |
| var r2 = Math.sqrt(0.6) * radius | |
| var r3 = Math.sqrt(0.3) * radius | |
| var canvas = d3.select('.curve-clock-2') | |
| .attr('width', width) | |
| .attr('height', height) | |
| var context = canvas.node().getContext("2d") | |
| var line = d3.radialLine() | |
| .context(context) | |
| // context.clearRect(0, 0, width, height); | |
| // context.fillStyle = "steelblue"; | |
| // context.beginPath(); | |
| // for (var i = 1; i < data.length; ++i) { | |
| // var d = data[i]; | |
| // context.moveTo(d[0], d[1]); | |
| // // context.arc(d[0], d[1], 10, 0, 2 * Math.PI); | |
| // line(d) | |
| // } | |
| // context.stroke(); | |
| // context.fill(); | |
| function render(date) { | |
| var ms = date.getMilliseconds() / 1000, | |
| s = date.getSeconds() / 60, | |
| m = date.getMinutes() / 60, | |
| h = date.getHours() % 12 / 12 | |
| var data = [ | |
| [0, 0], | |
| [tau * (s + ms / 60), r1], | |
| [tau * (m + s / 60 + (ms / 6000)), r2], | |
| [tau * (h + m / 12 + s / (12 * 60)), r3] | |
| ] | |
| // console.log(data) | |
| // context.clearRect(0, 0, width, height); | |
| context.save() | |
| // context.fillStyle = "#fff" | |
| context.fillStyle = 'rgba(255,255,255,0.1)'; | |
| // context.globalAlpha = 0.0091 | |
| // context.fillStyle = "rgba(255,255,255,.05)" | |
| context.fillRect(0, 0, width, height) | |
| // context.clearRect(0, 0, width, height) | |
| context.restore() | |
| context.save() | |
| context.translate(width/2, height/2) | |
| context.beginPath(); | |
| // line(data) | |
| // line.curve(d3.curveCatmullRomClosed.alpha(0))(data) | |
| line.curve(d3.curveCatmullRomClosed.alpha(1))(data) | |
| context.closePath() | |
| context.stroke() | |
| context.restore() | |
| // console.log(line(data)) | |
| // curve1.datum(data).attr('d', line.curve(d3.curveCatmullRomClosed.alpha(0))) | |
| // curve2.datum(data).attr('d', line.curve(d3.curveCatmullRomClosed.alpha(1))) | |
| // curve3.datum(data).attr('d', line.curve(d3.curveCatmullRomClosed.alpha(1.5))) | |
| } | |
| function tick() { | |
| var now = new Date() | |
| // console.log(now) | |
| d3.timeout(tick, 1000 - now % 1000) | |
| render(now) | |
| } | |
| tick() | |
| // d3.timer(tick) | |
| })() | |
| </script> | |
| </body> | |
| </html> |
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