renderWheel()
This commit is contained in:
Anthony Lieuallen
parent
a6d9f01ec8
commit
64922129d2
144
colors.html
144
colors.html
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@ -206,47 +206,51 @@ const cy = radius;
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const svg = document.querySelector('svg');
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const svgStyle = svg.querySelector('style').sheet;
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let colorsBySite = {};
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let sites = [];
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Object.entries(colors).forEach(([name, color], _) => {
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let [r, g, b] = color;
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let [h, s, v] = rgb2hsv(r/255, g/255, b/255);
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// TODO: Select-able color categories, re-render wheel.
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function renderWheel() {
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let colorsBySite = {};
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let sites = [];
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Object.entries(colors).forEach(([name, color], _) => {
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let [r, g, b] = color;
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let [h, s, v] = rgb2hsv(r/255, g/255, b/255);
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// Based on https://stackoverflow.com/a/54522007/91238 .
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let colorRadius = s * radius;
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let colorAngle = h/360 * 2 * Math.PI;
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// Based on https://stackoverflow.com/a/54522007/91238 .
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let colorRadius = s * radius;
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let colorAngle = h/360 * 2 * Math.PI;
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let x = Math.cos(colorAngle) * colorRadius + 512;
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let y = Math.sin(colorAngle) * colorRadius + 512;
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sites.push({x: x, y: y});
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colorsBySite[[x, y]] = name;
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});
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let voronoi = new Voronoi().compute(sites, {xl: 0, xr: 1024, yt: 0, yb: 1024});
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voronoi.cells.forEach(cell => {
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if (cell.closeMe) {
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console.warn('cell', cell, 'needs closing');
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return;
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}
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let colorName = colorsBySite[[cell.site.x, cell.site.y]];
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let [r, g, b] = colors[colorName];
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let c = document.createElementNS('http://www.w3.org/2000/svg', 'polygon');
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c.setAttribute('data-color', colorName);
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c.setAttribute('mask', 'url(#circle-mask)');
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let points = '';
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cell.halfedges.forEach(edge => {
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let s = edge.getStartpoint();
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let e = edge.getEndpoint();
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points += `${s.x} ${s.y}, `;
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let x = Math.cos(colorAngle) * colorRadius + 512;
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let y = Math.sin(colorAngle) * colorRadius + 512;
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sites.push({x: x, y: y});
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colorsBySite[[x, y]] = name;
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});
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c.setAttribute('points', points);
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svg.appendChild(c);
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let rgb = `rgb(${r}, ${g}, ${b})`;
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svgStyle.insertRule(`[data-color=${colorName}] { fill: ${rgb}; stroke: ${rgb}; }`);
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});
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let voronoi = new Voronoi().compute(sites, {xl: 0, xr: 1024, yt: 0, yb: 1024});
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voronoi.cells.forEach(cell => {
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if (cell.closeMe) {
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console.warn('cell', cell, 'needs closing');
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return;
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}
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let colorName = colorsBySite[[cell.site.x, cell.site.y]];
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let [r, g, b] = colors[colorName];
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let c = document.createElementNS('http://www.w3.org/2000/svg', 'polygon');
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c.setAttribute('data-color', colorName);
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c.setAttribute('mask', 'url(#circle-mask)');
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let points = '';
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cell.halfedges.forEach(edge => {
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let s = edge.getStartpoint();
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let e = edge.getEndpoint();
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points += `${s.x} ${s.y}, `;
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});
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c.setAttribute('points', points);
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svg.appendChild(c);
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let rgb = `rgb(${r}, ${g}, ${b})`;
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svgStyle.insertRule(`[data-color=${colorName}] { fill: ${rgb}; stroke: ${rgb}; }`);
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});
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}
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renderWheel();
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function activateColor(el) {
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renderPreview(el.getAttribute('data-color'));
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@ -257,6 +261,30 @@ function activateColor(el) {
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el.style.stroke = 'black';
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}
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// https://stackoverflow.com/a/5624139/91238
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function componentToHex(c) {
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var hex = c.toString(16);
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return hex.length == 1 ? "0" + hex : hex;
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}
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function rgbToHex(r, g, b) {
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return "#" + componentToHex(r) + componentToHex(g) + componentToHex(b);
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}
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let previewLocked = false;
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function renderPreview(color) {
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if (!color) {
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document.getElementById('preview').innerHTML = '';
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return;
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}
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let [r, g, b] = colors[color];
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document.getElementById('preview').innerHTML = `
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${color}
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<span id='swatch' style='background-color: ${color};'> </span>
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${rgbToHex(r, g, b).toUpperCase()}
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`;
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}
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svg.addEventListener('mouseover', e => {
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let el = e.target;
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if (el.tagName != 'polygon') return;
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@ -275,44 +303,26 @@ svg.addEventListener('mouseout', e => {
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el.removeAttribute('style');
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}
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});
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svg.addEventListener('click', e => {
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document.body.addEventListener('click', e => {
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let el = e.target;
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if (el.tagName != 'polygon') return;
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// Remove possible forced stroke from previously-locked color.
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document.querySelectorAll('polygon[style]').forEach(el => {
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el.removeAttribute('style');
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});
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if (el.tagName != 'polygon') {
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previewLocked = false;
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renderPreview(null);
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return;
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}
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previewLocked = true;
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activateColor(el);
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});
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// https://stackoverflow.com/a/5624139/91238
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function componentToHex(c) {
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var hex = c.toString(16);
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return hex.length == 1 ? "0" + hex : hex;
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}
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function rgbToHex(r, g, b) {
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return "#" + componentToHex(r) + componentToHex(g) + componentToHex(b);
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}
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let previewLocked = false;
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function renderPreview(color) {
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if (!color) {
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document.getElementById('preview').innerHTML = '';
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return;
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}
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let [r, g, b] = colors[color];
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document.getElementById('preview').innerHTML = `
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<h1>
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${color}
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<span id='swatch' style='background-color: ${color};'> </span>
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${rgbToHex(r, g, b).toUpperCase()}
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</h1>
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`;
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}
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</script>
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<div id="preview"></div>
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<h1 id="preview"></h1>
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<!--
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https://news.ycombinator.com/item?id=33647207
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-->
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