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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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.axis--x path { display: none; } |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 1.5px; |
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} |
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.cursor { |
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stroke-width: 2; |
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stroke: red; |
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fill: none; |
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} |
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</style> |
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<button onclick="play_pause()">Play/Pause</button> |
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<button onclick="restart()">Restart</button> |
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<svg width="960" height="480"></svg> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/tone/0.8.0/Tone.min.js"></script> |
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<script> |
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var svg = d3.select("svg"), |
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margin = {top: 20, right: 20, bottom: 30, left: 50}, |
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width = +svg.attr("width") - margin.left - margin.right, |
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height = +svg.attr("height") - margin.top - margin.bottom, |
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g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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var parseTime = d3.timeParse("%d-%b-%y"); |
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var x = d3.scaleTime().rangeRound([0, width]); |
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var y = d3.scaleLinear().rangeRound([height, 0]); |
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var yfreq = d3.scaleLinear().range([65.4064, 1046.50]); |
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var line = d3.line() |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y(d.close); }); |
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var synth = new Tone.Synth({ |
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"oscillator" : { "type" : "square" }, |
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"envelope" : { |
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"attack" : 0.01, |
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"decay" : 0.2, |
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"sustain" : 0.2, |
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"release" : 0.2, |
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} |
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}).toMaster(); |
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var playing = false, play_idx = 0, reset = false; |
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function play_pause() { playing = !playing; } |
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function restart() { play_idx = 0; reset = true; } |
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d3.tsv("data.tsv", function(d) { |
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d.date = parseTime(d.date); |
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d.close = +d.close; |
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return d; |
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}, function(error, data) { |
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if (error) throw error; |
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|
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x.domain(d3.extent(data, function(d) { return d.date; })); |
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y.domain(d3.extent(data, function(d) { return d.close; })); |
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yfreq.domain(d3.extent(data, function(d) { return d.close; })); |
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g.append("g") |
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.attr("class", "axis axis--x") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x)); |
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|
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g.append("g") |
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.attr("class", "axis axis--y") |
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.call(d3.axisLeft(y)) |
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.append("text") |
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.attr("fill", "#000") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 6) |
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.attr("dy", "0.71em") |
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.style("text-anchor", "end") |
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.text("Price ($)"); |
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g.append("path") |
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.datum(data) |
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.attr("class", "line") |
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.attr("d", line); |
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|
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var xidx = data.map(line.x()); |
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var freqs = data.map((d) => yfreq(d.close)); |
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function tick() { |
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if (playing && play_idx < xidx.length) { |
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synth.triggerAttackRelease(freqs[play_idx], 0.05); |
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d3.select(this).attr("x1", xidx[play_idx]).attr("x2", xidx[play_idx]); |
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play_idx++; |
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} else if (reset) { |
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d3.select(this).attr("x1", xidx[play_idx]).attr("x2", xidx[play_idx]); |
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reset = false; |
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} |
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d3.active(this).transition().on("start", tick); |
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} |
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|
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g.append("line") |
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.attr("x1", 0) |
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.attr("y1", 0) |
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.attr("x2", 0) |
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.attr("y2", height) |
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.attr("class", "cursor") |
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.transition() |
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.duration(50) |
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.ease(d3.easeLinear) |
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.on("start", tick); |
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}); |
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</script> |