An analog clock, using the D3 radial axis to render the frame.
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April 20, 2017 19:20
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Analog Clock
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| license: mit |
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| <head> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.23.1/babel.min.js"></script> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/d3/4.6.0/d3.min.js"></script> | |
| <script src="//unpkg.com/d3-radial-axis@1.5/dist/d3-radial-axis.min.js"></script> | |
| <link rel="stylesheet" href="style.css"> | |
| </head> | |
| <body> | |
| <svg id="canvas"></svg> | |
| <script type="text/babel" src="index.js"></script> | |
| </body> |
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| const r = Math.min(window.innerWidth, window.innerHeight) / 2, | |
| secMinScale = d3.scaleLinear().domain([0, 60]).range([0, 360]), | |
| hourScale = d3.scaleLinear().domain([0, 12]).range([0, 360]) | |
| const pointersRelDimensions = [ | |
| { class: 'hour', width: 0.05, height: 0.55 }, | |
| { class: 'min', width: 0.05, height: 0.85 }, | |
| { class: 'sec', width: 0.02, height: 0.85 } | |
| ] | |
| // Size canvas | |
| const svg = d3.select('#canvas') | |
| .attr('width', r * 2) | |
| .attr('height', r * 2) | |
| .attr('viewBox', `${-r} ${-r} ${r*2} ${r*2}`) | |
| // Add background | |
| svg.append('circle').classed('background', true) | |
| .attr('cx', 0) | |
| .attr('cy', 0) | |
| .attr('r', r) | |
| // Add axis | |
| svg.append('g').classed('axis', true) | |
| .call(d3.axisRadialInner( | |
| hourScale.copy().range([0, 2 * Math.PI]), | |
| r - 1 | |
| ) | |
| .ticks(12) | |
| .tickSize(12) | |
| ) | |
| svg.append('g').classed('minor-ticks', true) | |
| .call(d3.axisRadialInner( | |
| secMinScale.copy().range([0, 2 * Math.PI]), | |
| r - 1 | |
| ) | |
| .ticks(60) | |
| .tickSize(6) | |
| ) | |
| // Add pointers | |
| svg.append('g').classed('pointers', true) | |
| .attr('transform', `scale(${r})`) | |
| .selectAll('rect') | |
| .data(pointersRelDimensions) | |
| .enter() | |
| .append('rect') | |
| .attr('class', d=> d.class) | |
| .attr('x', d => -d.width/2) | |
| .attr('y', d => -d.height + d.width/2) | |
| .attr('width', d => d.width) | |
| .attr('height', d => d.height) | |
| .attr('rx', 0.02) | |
| .attr('ry', 0.03) | |
| // Add center | |
| svg.select('.pointers') | |
| .append('circle').classed('center', true) | |
| .attr('cx', 0) | |
| .attr('cy', 0) | |
| .attr('r', 0.02) | |
| // Kick-off clock | |
| framed() | |
| function framed() { | |
| const dt = new Date() | |
| const ms = dt.getMilliseconds(), | |
| secs = dt.getSeconds() + ms/1000, | |
| mins = dt.getMinutes() + secs/60, | |
| hours = dt.getHours()%12 + mins/60 | |
| d3.select('.pointers .hour').attr('transform', `rotate(${hourScale(hours)})`) | |
| d3.select('.pointers .min').attr('transform', `rotate(${secMinScale(mins)})`) | |
| d3.select('.pointers .sec').attr('transform', `rotate(${secMinScale(secs)})`) | |
| requestAnimationFrame(framed) | |
| } |
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| body { | |
| text-align: center; | |
| font-family: Sans-serif; | |
| margin: 0; | |
| } | |
| .background { | |
| stroke-width: 0; | |
| fill: Lavender; | |
| fill-opacity: 0.3; | |
| } | |
| .axis .domain, .axis .tick line { | |
| stroke-width: 2px; | |
| stroke: DarkSlateGrey; | |
| } | |
| .axis .tick:first-of-type { | |
| display: none; // hide 0 tick | |
| } | |
| .axis .tick text { | |
| font-size: 16px; | |
| } | |
| .minor-ticks text, .minor-ticks path { | |
| display: none; // Hide all but ticks | |
| } | |
| .pointers rect { | |
| fill-opacity: 0.7; | |
| } | |
| .pointers .hour, .pointers .min { | |
| fill: green; | |
| } | |
| .pointers .sec { | |
| fill: red; | |
| } | |
| .pointers .center { | |
| fill: darkgrey; | |
| } |
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