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colorwheel.html
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colorwheel.html
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<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Color Wheel</title>
<style>
svg {
touch-action: manipulation;
}
body {
font-size: 14px;
}
h1 {
color: #009242;
}
h2 {
color: #0065bd;
}
h3 {
color: #a100bd;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/@jaames/iro@5"></script>
</head>
<body>
<details id="intro" open>
<summary><h1 style="display: inline-block; line-height: 0">About</h1></summary>
<p>The chromatic scale, represented by ℤ/12ℤ, has four generators, which come in positive/negative pairs: chromatic motion (±1 = ∓11) and the circle of fifths (±5 = ∓7). Melodic motion is all about chromatic closeness, but harmonic motion is flips it around and half steps are harmonically distant whereas thirds and fifths are closer. With this project I want to explore mapping this harmonic to colors, and what better way than by intercalating a chromatic spectrum around the circle of fifths.</p>
<p>Unfortunately, the way that computers represent colors is not perceptually uniform, so it is difficult to find a balanced chromatic palette. So that is a work in progress.</p>
<p>In order to map the notes to the circular shape, I use shepard tones, which create the illusion of continuously ascending or descending scales by phasing octaves in and out. (Read <a href="https://en.wikipedia.org/wiki/Shepard_tone">the Wikipedia article</a> for more!) The way I created them is not the best so this part is also a work in progress.</p>
<h3>UI</h3>
<p>Play notes by clicking on segments of the chromatic circles!</p>
<p>The sustain option mimics the sustain pedal to leave notes playing so they overlap. If you leave it off, only the last note played will sustain. The silence button will silence that too.</p>
<p>The little slices inside the segments will swap colors schemes, from melodic to harmonic (with left/right mirror).</p>
<p>You can play shepard scales by dragging the “play scale” slider to select the chromatic interval between each note (0 will stop it). You can adjust the scale speed with the slider below it. It starts at the last note played.</p>
<p>The next three sliders will rotate notes and colors around the wheel. They are momentary so they reset back to center when you release them.</p>
<h3>Colors</h3>
<p>You can choose new colors by changing them on the color picker, courtesy of <a href="https://iro.js.org/">iro.js</a>.</p>
<p>Share the colors by copying the <a id="self-ref" href="#">URL of this page</a>, which will include the colors you chose!</p>
<p><a id="reset" href="">Reset to default colors</a></p>
<p><a id="blank-slate" href="#0=666666&1=666666&2=666666&3=666666&4=666666&5=666666&6=666666&7=666666&8=666666&9=666666&10=666666&11=666666">Blank slate / tabula rasa</a></p>
<details>
<summary><h2 style="display: inline-block; line-height: 0">Shepard tone calculator</h2></summary>
<span id="shepard_min_octave_value" style="display: inline-block; width: 1em;">1</span>
<input id="shepard_min_octave" type="range" min="0" max="8" step="1" value="1">
<label for="shepard_min_octave">Minimum octave</label>
<br>
<span id="shepard_max_octave_value" style="display: inline-block; width: 1em;">8</span>
<input id="shepard_max_octave" type="range" min="0" max="8" step="1" value="8">
<label for="shepard_max_octave">Maximum octave</label>
<br>
<span id="shepard_ramp_up_value" style="display: inline-block; width: 1em;">1</span>
<input id="shepard_ramp_up" type="range" min="0" max="4" step="1" value="1">
<label for="shepard_ramp_up">Octaves to reach full volume</label>
<br>
<span id="shepard_ramp_down_value" style="display: inline-block; width: 1em;">2</span>
<input id="shepard_ramp_down" type="range" min="0" max="4" step="1" value="2">
<label for="shepard_ramp_down">Octaves to come down from full volume</label>
<br>
<span id="shepard_note_name" style="display: inline-block; width: 1em;">C </span>
<input id="shepard_note" type="range" min="0" max="11" step="1" value="0">
<label for="shepard_note">Starting pitch</label>
<p>Table of volumes (0.0–1.0) for each note pitch (rows 0–11) and octave (columns 0–8).</p>
<table id="shepard_table" style="border-collapse: collapse;"></table>
<p>CSV data of each MIDI note number and its volume</p>
<pre id="shepard_csv" style="max-height: 15em; overflow: auto;"></pre>
<script>
var inputs = ["shepard_min_octave", "shepard_max_octave", "shepard_ramp_up", "shepard_ramp_down", "shepard_note"];
var note_names = ["C\xa0","C\u266F","D\xa0","D\u266F","E\xa0","F\xa0","F\u266F","G\xa0","G\u266F","A\xa0","A\u266F","B\xa0"];
var ramping = (i, min, max) => max==min ? 1 : (i+1-min)/(max-min);
function recalc() {
var min = +document.getElementById("shepard_min_octave").value;
var max = +document.getElementById("shepard_max_octave").value;
var ramp_up = +document.getElementById("shepard_ramp_up").value;
var ramp_down = +document.getElementById("shepard_ramp_down").value;
var note = +document.getElementById("shepard_note").value;
var sums = [0,0,0,0,0,0,0,0,0,0,0,0];
var data = {};
var tabular = {};
var csv = "";
var nodes = [
note + 12*min,
note + 12*(min + ramp_up),
note + 12*(max + 1 - ramp_down),
note + 12*(max + 1),
];
for (var i = nodes[0]; i < nodes[3]; i++) {
data[i] = Math.min(1, ramp_up ? ramping(i, nodes[0], nodes[1]) : 1, ramp_down ? 1-ramping(i, nodes[2], nodes[3]) : 1);
sums[i % 12] += data[i];
if (data[i]) {
if (!tabular[i % 12]) tabular[i % 12] = {};
tabular[i % 12][(i - i % 12)/12] = data[i].toFixed(5);
}
csv += i + ", " + data[i] + "\n";
}
document.getElementById("shepard_csv").textContent = csv;
var table = document.getElementById("shepard_table");
console.log(tabular, sums);
puttable(table, tabulate(tabular));
}
function tabulate(tabular) {
var result = [];
var rows = new Set(Object.keys(tabular));
if (!rows.size) return result;
var cols = new Set();
rows.forEach(i => Object.keys(tabular[i]).forEach(j => cols.add(j)));
cols = new Set(Array.from(cols).sort());
result.push(["Pitch\xa0", "number"].concat(Array.from(cols), "(octave)"));
for (let i of rows) {
var row = Array.from(cols).map(j => tabular[i][j]);
result.push([note_names[i], i].concat(row));
}
return result;
}
function adjust(parent, nodes) {
var length = nodes.length;
while (parent.lastChild) {
parent.removeChild(parent.lastChild);
}
for (let i in nodes) {
let [tag, value] = nodes[i];
parent.appendChild(document.createElement(tag));
if (typeof value === "string" || typeof value === "number") {
parent.children[i].textContent = value;
} else if (typeof value === "undefined" || value === null) {
parent.children[i].textContent = "";
} else {
value(parent.children[i]);
}
}
}
function puttable(table, tabulated) {
adjust(table, tabulated.map((row, i) => ["tr", tr => {
adjust(tr, row.map((entry, j) => {
var header = !i || j < 2;
return [ header ? "th" : "td", td => {
td.textContent = entry;
if (!header) {
td.style.width = "2em";
td.style.backgroundColor = "rgb(255," + (155+100*(1-entry)) + ",255)";
td.style.border = "1px solid #2c0fa0";
td.style.padding = "0.25em";
}
}];
}));
}]));
}
inputs.forEach(name => {
var i = document.getElementById(name);
var o = document.getElementById(name+"_value");
var n = document.getElementById(name+"_name");
i.addEventListener("input", () => {
var v = i.value;
if (o) {
o.textContent = v;
}
if (n) {
n.textContent = note_names[v];
}
recalc();
});
});
recalc();
</script>
</details>
</details>
<br>
<h1>Color Wheel</h1>
<script type="text/javascript">
// Wouldn't it be nice if the DOM API was nicer?
var svgNS = "http://www.w3.org/2000/svg";
Element.prototype.setAttributes = function setAttributes(attrs) {
for (let k in attrs) {
this.setAttribute(k, attrs[k]);
}
return this;
};
Element.prototype.createChild = function createChild(localName, options) {
var element;
var isSVG = localName === "svg" || this instanceof SVGElement;
var opts, attrs;
if (typeof options === "string") {
opts = options;
} else if (typeof options === "object" && options.is) {
opts = {is: options.is};
delete options.is;
attrs = options;
} else {
attrs = options;
}
if (isSVG) {
element = document.createElementNS(svgNS, localName, opts);
} else {
element = document.createElement(localName, opts);
}
if (attrs) {
element.setAttributes(attrs);
}
this.appendChild(element);
return element;
};
// SVG path helpers
function polarToCartesian(centerX, centerY, radius, angleInDegrees) {
var angleInRadians = (angleInDegrees-90) * Math.PI / 180.0;
return {
x: centerX + (radius * Math.cos(angleInRadians)),
y: centerY + (radius * Math.sin(angleInRadians))
};
}
function describeArc(x, y, radius, startAngle, endAngle){
var start = polarToCartesian(x, y, radius, endAngle);
var end = polarToCartesian(x, y, radius, startAngle);
var largeArcFlag = endAngle - startAngle <= 180 ? "0" : "1";
var d = [
"M", start.x, start.y,
"A", radius, radius, 0, largeArcFlag, 0, end.x, end.y,
].join(" ");
return d;
}
function describeSegment(x, y, inner, outer, startAngle, endAngle) {
var starti = polarToCartesian(x, y, inner, endAngle);
var endi = polarToCartesian(x, y, inner, startAngle);
var starto = polarToCartesian(x, y, outer, startAngle);
var endo = polarToCartesian(x, y, outer, endAngle);
var largeArcFlag = endAngle - startAngle <= 180 ? "0" : "1";
var d = [
"M", starti.x, starti.y,
"A", inner, inner, 0, largeArcFlag, 0, endi.x, endi.y,
"L", starto.x, starto.y,
"A", outer, outer, 0, largeArcFlag, 1, endo.x, endo.y,
"L", starti.x, starti.y,
].join(" ");
return d;
}
var mklength = function(len=12, val=undefined) {
var r = [];
for (var i=0; i<len; i++) {
r.push(val);
}
return r;
};
function norm(i) {
return (24+i) % 12;
}
function rot(i, gen=5) {
return gen*(+i) % 12;
}
function debounce(fn, interval=500) {
if (!debounce.debouncers) {
debounce.debouncers = [];
}
for (let d of debounce.debouncers) {
if (d[0] === fn) {
if (d[1] !== null) clearTimeout(d[1]);
d[1] = setTimeout(d[2], interval);
return d[1];
}
}
let i = debounce.debouncers.length;
let d = [
fn,
null,
(...arg) => {
var r = fn(...arg);
debounce.debouncers[i][1] = null;
return r;
}
];
debounce.debouncers.push(d);
d[1] = setTimeout(d[2], interval);
return d[1];
}
var palettes = {
"gitlab":
[
"#e24328", "#fc6c25", "#fca326", "#fdc743", "#ffe560", "#bae223",
"#22bc61", "#2d95bd", "#3871ab", "#3f4c9a", "#554488", "#9b2f48",
],
"blankslate":
[
"#666666", "#666666", "#666666", "#666666", "#666666", "#666666",
"#666666", "#666666", "#666666", "#666666", "#666666", "#666666",
],
"mine0":
[
"#15bc1d", "#3397ad", "#3871ab", "#3f4c9a", "#554488", "#9b034f",
"#eb002a", "#fc3200", "#fc7a00", "#fda03d", "#ffc27d", "#b5e24b",
],
"mine1":
[
"#15bc1d", "#3397ad", "#3871ab", "#433dbf", "#7d20a1", "#a60a6a",
"#eb002a", "#fc3200", "#fc7a00", "#fda03d", "#ffc27d", "#b5e24b",
],
};
var defaultPalette = "mine0";
var notes = ["c","cis","d","dis","e","f","fis","g","gis","a","ais","b"];
var audios = [];
var audio_sustain = false;
var audio_last_played = null;
var audio_playing = 0;
var audio_speed = 1000;
var audio_timer = null;
for (let note of notes) {
audios.push(new Audio("shepard_tone/shepard_tone_"+note+".mp3.mp3"));
fetch("shepard_tone/shepard_tone_"+note+".mp3.mp3", {})
.then(reponse => reponse.arrayBuffer())
.then((noteidx => buffer => {
var blob = new Blob([buffer], { type: 'audio/mp3' });
var url = window.URL.createObjectURL(blob);
const audio = new Audio();
audio.src = url;
audios[noteidx] = audio;
})(notes.findIndex(n => n === note)));
}
function playnote(i, sust=false, auto=false) {
if (i !== null) {
audios[i % 12].currentTime = 0;
audios[i % 12].play();
audio_last_played = i % 12;
if (!auto) {
ui.play_scale.input.value = 0;
ui.play_scale.label.textContent = "Play scale";
}
} else {
i = audio_last_played;
}
if (!sust) {
for (let j in audios) {
if (j != i) {
// A little overlap to not end too suddenly
setTimeout((k => () => audios[k].pause())(j), 40);
}
}
}
}
function playback() {
if (audio_playing === 0) {
if (audio_timer !== null) {
clearTimeout(audio_timer);
}
audio_timer = null;
return;
}
audio_last_played = norm(audio_last_played + audio_playing);
playnote(audio_last_played, audio_sustain, true);
audio_timer = setTimeout(playback, audio_speed);
}
var gens = [1,5,7,11];
var genstep = [1,1,1,5,5,5,7,7,7,11,11,11];
var genidx = [11,7,5,1,11,7,5,1,11,7,5,1];
var genadj = [0,1,2,4,5,6,6,7,8,10,11,0];
function WheelGroup() {
function Wheel(name) {
this.name = name;
this.svg = document.body.createChild("svg");
this.segments = [];
this.gen_elements = [];
this.notes = [];
this.gen = new Proxy({
value: 1,
display: true,
}, {
set: (...args) => {
var ret = Reflect.set(...args);
if (args[1] === "value") {
this.recolor();
} else if (args[1] === "display") {
this.redraw();
}
return ret;
}
});
this.colors = new Proxy(Wheel.colors.slice(), {
set: (...args) => {
var ret = Reflect.set(...args);
if (Object.keys(args[0]).includes(args[1])) {
this.recolor(this.rot(args[1]));
}
return ret;
}
});
for (var i=0; i<12; i++) {
var segment = this.svg.createChild("path", {
"cursor": "pointer",
});
this.segments.push(segment);
segment.addEventListener("click", (j => e => {
audio_playing = 0;
playnote(norm(j+this.layout.note_shift), audio_sustain);
})(i));
var note = this.svg.createChild("text", {
"dominant-baseline": "middle",
"text-anchor": "middle",
"cursor": "pointer",
"fill": "white",
});
this.notes.push(note);
note.addEventListener("click", (j => e => {
audio_playing = 0;
playnote(norm(j+this.layout.note_shift), audio_sustain);
})(i));
var gen = this.svg.createChild("path", {
"cursor": "pointer",
});
this.gen_elements.push(gen);
gen.addEventListener("click", (j => e => {
this.gen.value = norm(genstep[j]*genstep[j]*genstep[j]*this.rot(genidx[j]));
})(i));
}
this.layout = new Proxy(Object.assign({}, Wheel.layout), {
set: (...args) => {
var ret = Reflect.set(...args);
this.redraw();
return ret;
}
});
this.redraw();
this.recolor();
Wheel.instances.push(this);
return this;
};
Wheel.prototype.redraw = function() {
this.svg.setAttribute("width", this.layout.size);
this.svg.setAttribute("height", this.layout.size);
for (var i=0; i<12; i++) {
var d = describeSegment(
this.layout.size/2, this.layout.size/2,
this.layout.inner*this.layout.size,
this.layout.outer*this.layout.size,
-15+30*i+this.layout.rotate,
15+30*i+this.layout.rotate,
);
this.segments[i].setAttributes({ d });
}
for (var i=0; i<12; i++) {
var center = polarToCartesian(
this.layout.size/2, this.layout.size/2,
(this.layout.inner + this.layout.outer)*this.layout.size/2,
30*i+this.layout.rotate
);
this.notes[i].setAttributes(center);
this.notes[i].textContent = notes[norm(i+this.layout.note_shift)].replace("is", "\u266F");
this.notes[i].setAttributes({
d,
"display": this.layout.notes ? "inherit" : "none"
});
}
for (var j=0; j<12; j++) {
var center = polarToCartesian(
this.layout.size/2, this.layout.size/2,
(this.layout.inner - this.layout.gen_dist)*this.layout.size,
30*genstep[j]+this.layout.rotate
);
var d = describeSegment(
center.x, center.y,
0,
this.layout.gen_size*this.layout.size,
-15+30*genadj[j]+this.layout.rotate,
15+30*genadj[j]+this.layout.rotate,
);
this.gen_elements[j].setAttributes({
d,
"display": this.gen.display ? "inherit" : "none"
});
}
return this;
};
Wheel.prototype.recolor = function(i=undefined) {
if (i !== undefined) {
this.segments[i].setAttribute("fill", this.colors[this.rot(i)]);
this.gen_elements[i].setAttribute("fill", this.colors[this.rot(genidx[i])]);
if (this.name) {
document.body.style.setProperty("--"+this.name+"-note-"+notes[i], this.colors[this.rot(i)]);
}
} else {
for (var j=0; j<12; j++) {
this.recolor(j);
}
}
return this;
};
Wheel.prototype.remove = function() {
document.body.removeChild(this.svg);
this.svg = null;
this.decouple();
return this;
};
Wheel.prototype.decouple = function() {
var i = Wheel.instances.findIndex(e => e === this);
if (i !== -1) {
Wheel.instances.splice(i, 1);
}
return this;
}
Wheel.prototype.rot = function(i) {
return rot(+i, this.gen.value);
};
Wheel.prototype.palette = function(name) {
for (var i=0; i<12; i++) {
this.colors[i] = palettes[name][this.rot(i)];
}
return this;
};
Wheel.colors = new Proxy(mklength(), {
set: (...args) => {
var ret = Reflect.set(...args);
if (Object.keys(args[0]).includes(args[1])) {
for (var j=0; j<Wheel.instances.length; j++) {
Wheel.instances[j].colors[args[1]] = args[2];
}
if (colorPicker) {
colorPicker.colors[args[1]].hexString = args[2];
debounce(setHash);
}
}
return ret;
}
});
Wheel.hsl = function(saturation=60, lightness=50) {
for (var i=0; i<12; i++) {
Wheel.colors[i] = ["hsl(", [30*i,saturation+"%",lightness+"%"].join(","), ")"].join("");
}
};
Wheel.palette = function(name) {
for (var i=0; i<12; i++) {
Wheel.colors[i] = palettes[name][i];
}
};
Wheel.recolor = function(...arg) {
for (var j=0; j<Wheel.instances.length; j++) {
Wheel.instances[j].recolor(...arg);
}
};
Wheel.cycle_colors = function(amount) {
var tmp = Array.from(Wheel.colors);
for (var i=0; i<12; i++) {
Wheel.colors[i] = tmp[norm(i+amount)];
}
};
Wheel.layout = new Proxy({
size: 256,
inner: 140/512,
outer: 240/512,
rotate: 0,
gen_dist: 50/512,
gen_size: 30/512,
notes: true,
note_shift: 0,
}, {
set: (...args) => {
var ret = Reflect.set(...args);
for (var j=0; j<Wheel.instances.length; j++) {
Wheel.instances[j].layout[args[1]] = args[2];
}
return ret;
}
});
Wheel.instances = [];
return Wheel;
};
var main = WheelGroup();
main.palette(defaultPalette);
var nbsp = "\xa0";
var ui = {};
ui.sustain = {};
ui.sustain.name = "Sustain ";
ui.sustain.div = document.body.createChild("div");
ui.sustain.label = ui.sustain.div.createChild("label", {
for: "sustain",
});
ui.sustain.label.textContent = ui.sustain.name;
ui.sustain.input = ui.sustain.div.createChild("input", {
id: "sustain",
type: "checkbox",
value: audio_sustain,
});
ui.sustain.input.addEventListener("input", () => {
audio_sustain = ui.sustain.input.checked;
if (!audio_sustain) {
playnote(null, false);
}
});
ui.sustain.button = ui.sustain.div.createChild("button");
ui.sustain.button.textContent = "Silence";
ui.sustain.button.addEventListener("click", () => {
audio_last_played = null; audio_playing = 0;
playnote(null, false);
playback();
if (ui.play_scale) {
ui.play_scale.label.textContent = ui.play_scale.name;
ui.play_scale.input.value = 0;
}
});
ui.play_scale = {};
ui.play_scale.name = "Play scale";
ui.play_scale.last_value = 0;
ui.play_scale.div = document.body.createChild("div");
ui.play_scale.label = ui.play_scale.div.createChild("label", {
for: "play_scale",
class: "slider_label",
style: "display: block; top: 100%; width: 150px; text-align: center;",
});
ui.play_scale.label.textContent = ui.play_scale.name;
ui.play_scale.input = ui.play_scale.div.createChild("input", {
id: "play_scale",
class: "slider",
type: "range",
min: -6, max: 6,
value: 0,
step: 1,
style: "width: 150px;"
});
ui.play_scale.input.addEventListener("input", () => {
if (ui.play_scale.input.value === "0") {
ui.play_scale.label.textContent = "Stop";
} else {
ui.play_scale.label.textContent = ui.play_scale.input.value;
}
});
ui.play_scale.input.addEventListener("mouseup", () => {
if (ui.play_scale.input.value == "0") {
ui.play_scale.label.textContent = ui.play_scale.name;
}
});
ui.play_scale.input.addEventListener("change", () => {
// Stop scale first
audio_playing = 0; playback();
audio_playing = +ui.play_scale.input.value;
if (audio_last_played === null) audio_last_played = 0;
playback();
if (ui.play_scale.input.value == "0") {
ui.play_scale.label.textContent = ui.play_scale.name;
}
});
ui.audio_speed = {};
ui.audio_speed.name = "Scale speed";
ui.audio_speed.last_value = 0;
ui.audio_speed.div = document.body.createChild("div");
ui.audio_speed.label = ui.audio_speed.div.createChild("label", {
for: "audio_speed",
class: "slider_label",
style: "display: block; top: 100%; width: 150px; text-align: center;",
});
ui.audio_speed.label.textContent = ui.audio_speed.name;
ui.audio_speed.input = ui.audio_speed.div.createChild("input", {
id: "audio_speed",
class: "slider",
type: "range",
min: 0.125, max: 10,
value: 1000/audio_speed,
step: "any",
style: "width: 150px;"
});
ui.audio_speed.input.addEventListener("input", () => {
ui.audio_speed.label.textContent = (""+(+ui.audio_speed.input.value)).substring(0,5) + " Hz";
audio_speed = 1000/+ui.audio_speed.input.value;
});
ui.audio_speed.input.addEventListener("mouseup", () => {
ui.audio_speed.label.textContent = ui.audio_speed.name;
});
ui.note_shift = {};
ui.note_shift.name = "Rotate notes";
ui.note_shift.last_value = 0;
ui.note_shift.div = document.body.createChild("div");
ui.note_shift.label = ui.note_shift.div.createChild("label", {
for: "note_shift",
class: "slider_label",
style: "display: block; top: 100%; width: 150px; text-align: center;",
});
ui.note_shift.label.textContent = ui.note_shift.name;
ui.note_shift.input = ui.note_shift.div.createChild("input", {
id: "note_shift",
class: "slider",
type: "range",
min: -11, max: 11,
value: 0,
step: 1,
style: "width: 150px;"
});
ui.note_shift.input.addEventListener("input", () => {
ui.note_shift.label.textContent = ui.note_shift.input.value;
main.layout.note_shift = norm(-ui.note_shift.last_value + +ui.note_shift.input.value);
});
ui.note_shift.input.addEventListener("mouseup", () => {
ui.note_shift.label.textContent = ui.note_shift.name;
});
ui.note_shift.input.addEventListener("change", () => {
ui.note_shift.last_value = +ui.note_shift.input.value;
ui.note_shift.input.value = 0;
});
ui.cycle = {};
ui.cycle.name = "Cycle colors";
ui.cycle.last_value = 0;
ui.cycle.div = document.body.createChild("div");
ui.cycle.label = ui.cycle.div.createChild("label", {
for: "cycle",
class: "slider_label",
style: "display: block; top: 100%; width: 150px; text-align: center;",
});
ui.cycle.label.textContent = ui.cycle.name;
ui.cycle.input = ui.cycle.div.createChild("input", {
id: "cycle",
class: "slider",
type: "range",
min: -11, max: 11,
value: 0,
step: 1,
style: "width: 150px;"
});
ui.cycle.input.addEventListener("input", () => {
ui.cycle.label.textContent = ui.cycle.input.value;
main.cycle_colors(24 + ui.cycle.last_value + -ui.cycle.input.value);
ui.cycle.last_value = +ui.cycle.input.value;
});
ui.cycle.input.addEventListener("mouseup", () => {
ui.cycle.label.textContent = ui.cycle.name;
});
ui.cycle.input.addEventListener("change", () => {
ui.cycle.input.value = 0;
ui.cycle.last_value = 0;
});
ui.rotate = {};
ui.rotate.name = "Rotate wheel";
ui.rotate.last_value = main.layout.rotate;
ui.rotate.div = document.body.createChild("div");
ui.rotate.label = ui.rotate.div.createChild("label", {
for: "rotate",
class: "slider_label",
style: "display: block; top: 100%; width: 150px; text-align: center;",
});
ui.rotate.label.textContent = ui.rotate.name;
ui.rotate.input = ui.rotate.div.createChild("input", {
id: "rotate",
class: "slider",
type: "range",
min: -180, max: 180,
value: 0,
step: 15,
style: "width: 150px;"
});
ui.rotate.input.addEventListener("input", () => {
ui.rotate.label.textContent = ui.rotate.input.value + "\u00B0";
main.layout.rotate = ui.rotate.last_value + +ui.rotate.input.value;
});
ui.rotate.input.addEventListener("mousemove", (e) => {
if (e.shiftKey) {
ui.rotate.input.step = 1;
} else {
ui.rotate.input.step = 15;
}
});
ui.rotate.input.addEventListener("mouseup", () => {
ui.rotate.label.textContent = ui.rotate.name;
});
ui.rotate.input.addEventListener("change", () => {
ui.rotate.label.textContent = ui.rotate.name;
ui.rotate.last_value = main.layout.rotate = ui.rotate.last_value + +ui.rotate.input.value;
ui.rotate.input.value = 0;
});
var color_body = document.body.createChild("div", {
class: "colorPicker"
});
/*
ui.colors = notes.map((note,i) => {
var color = {};
color.input = color_body.createChild("input", {
type: "color",
value: main.colors[i],
});
color.input.addEventListener("input", () => {
main.colors[i] = color.input.value;
});
return color;
});
*/
var colorPicker = new iro.ColorPicker(".colorPicker", {
// color picker options
// Option guide: https://iro.js.org/guide.html#color-picker-options
width: 260,
// Pure red, green and blue
colors: main.colors.slice(),
handleRadius: 9,
borderWidth: 1,
borderColor: "#fff",
});
function setColor(colorIndex) {
// setActiveColor expects the color index!
colorPicker.setActiveColor(colorIndex);
}
// https://iro.js.org/guide.html#color-picker-events
colorPicker.on(["mount", "color:change"], function(){
colorPicker.colors.forEach(color => {
const index = color.index;
const hexString = color.hexString;
main.colors[index] = hexString;
});
});
colorPicker.on(["mount", "color:setActive", "color:change"], function(){
// colorPicker.color is always the active color
const index = colorPicker.color.index;
const hexString = colorPicker.color.hexString;
})
var wheel0 = new main("wheel0");
var wheel1 = new main("wheel1");
wheel0.gen.value = 7;
wheel1.layout.notes = false;
function parseHash() {
var search = window.location.hash;
if (search && search[0] === "#") {
search = search.substring(1);
}
for (let [k,v] of new URLSearchParams(search).entries()) {
if (v[0] !== "#") {
v = "#" + v;
}
if (v.length !== 7) {
continue;
}
var i = +k;
if (!isNaN(i) && Number.isInteger(i) && 0 <= i && i < main.colors.length) {
main.colors[i] = v;
}
}
}
function setHash() {
var s = new URLSearchParams();
for (let i in notes) {
s.set(i, main.colors[i].substring(1));
}
window.location.replace("#"+s.toString());
document.getElementById("self-ref").href = window.location;
}
document.getElementById("reset").href = location.protocol + "//" + location.host + location.pathname;
document.getElementById("blank-slate").href = location.protocol + "//" + location.host + location.pathname + "#0=666666&1=666666&2=666666&3=666666&4=666666&5=666666&6=666666&7=666666&8=666666&9=666666&10=666666&11=666666";
document.getElementById("reset").addEventListener("click", e => {
main.palette(defaultPalette);
});
document.getElementById("blank-slate").addEventListener("click", e => {
main.palette("blankslate");
});
parseHash();
var tables = document.body.createChild("tables");
Object.assign(tables.style, {
display: "flex",
});
var chords = [[0,4,7], [0,3,7], [0,3,6]];
for (let chord of chords) {
var table = tables.createChild("table");
Object.assign(table.style, {
borderSpacing: "0px",
borderCollapse: "separate",
margin: "0 1em",
});
for (var i=0; i<12; i++) {
var tr = table.createChild("tr");
Object.assign(tr.style, {
backgroundColor: "var(--wheel0-note-" + notes[norm(i)] + ")",
border: "1px solid " + "var(--wheel0-note-" + notes[norm(i)] + ")",
cursor: "pointer",
});
tr.addEventListener("click", (i => () => {
audio_playing = 0;
var sus = audio_sustain;
for (let [k,j] of chord.entries()) {
setTimeout(playnote.bind(this, norm(i+j), sus), 60*k);
sus = true;
}
})(i));
for (let [k,j] of chord.entries()) {
var td = tr.createChild("td");
td.textContent = notes[norm(i+j)].replace("is", "\u266F");
Object.assign(td.style, {
textAlign: "center",
verticalAlign: "middle",
color: "white",
border: "6px solid " + "var(--wheel0-note-" + notes[norm(i)] + ")",
backgroundColor: "var(--wheel0-note-" + notes[norm(i+j)] + ")",
width: "40px",
height: "40px",
});
if (k > 0) {
td.style.borderLeftWidth = 0;
}
}
}
}
</script>
</body>