LUT visualizer
This commit is contained in:
Ian Gulliver
33
docs/lut.html
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33
docs/lut.html
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<html>
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<head>
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<title>LUT experiment</title>
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<style>
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@import url('https://fonts.googleapis.com/css?family=Roboto+Mono');
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table {
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font-family: 'Roboto Mono';
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border-style: solid;
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border-width: 3px;
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border-collapse: collapse;
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margin: 10px;
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}
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th, td {
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border-style: solid;
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border-width: 1px;
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padding: 5px;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<script src="lut.js"></script>
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<script>
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new LutExperiment(document.getElementById("container"));
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</script>
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</body>
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</html>
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176
docs/lut.js
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176
docs/lut.js
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'use strict';
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function leftPad(str, len) {
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while (str.length < len) {
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str = '0' + str;
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}
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return str;
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}
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function createElement(parentNode, tagName, opt_text) {
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let element = document.createElement(tagName);
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if (opt_text !== undefined) {
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element.textContent = opt_text;
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}
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parentNode.appendChild(element);
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return element;
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}
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class Point {
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constructor(r, g, b) {
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this.r = r;
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this.g = g;
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this.b = b;
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this.HEX_DIV = 256;
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this.HEX_PAD = 2;
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}
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getHexColor() {
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return '#' + this.toHexValue(this.r) + this.toHexValue(this.g) + this.toHexValue(this.b);
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}
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toHexValue(val) {
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return leftPad(Math.floor(val / this.HEX_DIV).toString(16), this.HEX_PAD);
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}
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addSwatch(parentElement) {
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let elem = createElement(parentElement, 'td')
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elem.style = 'width: 5em; text-align: center; text-shadow: 1px 1px 0 white; background-color: ' + this.getHexColor();
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return elem;
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}
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addColorCells(parentElement) {
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this.addSwatch(parentElement);
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createElement(parentElement, 'td', leftPad(this.r.toString(16), 4));
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createElement(parentElement, 'td', leftPad(this.g.toString(16), 4));
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createElement(parentElement, 'td', leftPad(this.b.toString(16), 4));
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}
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}
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class LutExperiment {
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constructor(container) {
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this.container = container;
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this.SIZE = 5;
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this.NUM_COLOR = 2 ** 16;
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this.PER_BLOCK = Math.floor(this.NUM_COLOR / (this.SIZE - 1));
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this.generatePoints();
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this.colorChecker = [
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new Point(0x7300, 0x5200, 0x4400),
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new Point(0xc200, 0x9600, 0x8200),
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new Point(0x6200, 0x7a00, 0x9d00),
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new Point(0x5700, 0x6c00, 0x4300),
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new Point(0x8500, 0x8000, 0xb100),
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new Point(0x6700, 0xbd00, 0xaa00),
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new Point(0xd600, 0x7e00, 0x2c00),
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new Point(0x5000, 0x5b00, 0xa600),
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new Point(0xc100, 0x5a00, 0x6300),
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new Point(0x5e00, 0x3c00, 0x6c00),
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new Point(0x9d00, 0xbc00, 0x4000),
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new Point(0xe000, 0xa300, 0x2e00),
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new Point(0x3800, 0x3d00, 0x9600),
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new Point(0x4600, 0x9400, 0x4900),
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new Point(0xaf00, 0x3600, 0x3c00),
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new Point(0xe700, 0xc700, 0x1f00),
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new Point(0xbb00, 0x5600, 0x9500),
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new Point(0x0800, 0x8500, 0xa100),
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new Point(0xf300, 0xf300, 0xf200),
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new Point(0xc800, 0xc800, 0xc800),
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new Point(0xa000, 0xa000, 0xa000),
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new Point(0x7a00, 0x7a00, 0x7900),
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new Point(0x5500, 0x5500, 0x5500),
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new Point(0x3400, 0x3400, 0x3400),
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];
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this.showColorChecker();
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this.showResults();
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}
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generatePoints() {
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this.points = new Array();
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for (let x = 0; x < this.SIZE; ++x) {
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this.points[x] = new Array();
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for (let y = 0; y < this.SIZE; ++y) {
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this.points[x][y] = new Array();
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for (let z = 0; z < this.SIZE; ++z) {
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this.points[x][y][z] = new Point(this.getColorValue(x), this.getColorValue(y), this.getColorValue(z));
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}
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}
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}
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}
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getColorValue(index) {
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return Math.min(this.NUM_COLOR - 1, this.PER_BLOCK * index);
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}
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showColorChecker() {
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let table = createElement(this.container, 'table');
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let headers = createElement(table, 'tr');
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createElement(headers, 'th', 'Swatch');
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createElement(headers, 'th', 'R');
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createElement(headers, 'th', 'G');
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createElement(headers, 'th', 'B');
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createElement(headers, 'th', 'Root');
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createElement(headers, 'th', 'x+1');
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createElement(headers, 'th', 'y+1');
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createElement(headers, 'th', 'z+1');
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createElement(headers, 'th', 'x+1,y+1');
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createElement(headers, 'th', 'x+1,z+1');
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createElement(headers, 'th', 'y+1,z+1');
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for (let point of this.colorChecker) {
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let tr = createElement(table, 'tr');
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point.addColorCells(tr);
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let rootX = Math.min(Math.floor(point.r / this.PER_BLOCK), this.SIZE - 2);
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let rootY = Math.min(Math.floor(point.g / this.PER_BLOCK), this.SIZE - 2);
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let rootZ = Math.min(Math.floor(point.b / this.PER_BLOCK), this.SIZE - 2);
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this.points[rootX][rootY][rootZ].addSwatch(tr).textContent = rootX + ',' + rootY + ',' + rootZ;
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this.points[rootX + 1][rootY][rootZ].addSwatch(tr);
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this.points[rootX][rootY + 1][rootZ].addSwatch(tr);
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this.points[rootX][rootY][rootZ + 1].addSwatch(tr);
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this.points[rootX + 1][rootY + 1][rootZ].addSwatch(tr);
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this.points[rootX + 1][rootY][rootZ + 1].addSwatch(tr);
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this.points[rootX][rootY + 1][rootZ + 1].addSwatch(tr);
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}
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}
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showResults() {
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let table = createElement(this.container, 'table');
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let headers = createElement(table, 'tr');
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createElement(headers, 'th', 'X');
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createElement(headers, 'th', 'Y');
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createElement(headers, 'th', 'Z');
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createElement(headers, 'th', 'Swatch');
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createElement(headers, 'th', 'R');
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createElement(headers, 'th', 'G');
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createElement(headers, 'th', 'B');
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for (let x = 0; x < this.SIZE; ++x) {
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let square = this.points[x];
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for (let y = 0; y < this.SIZE; ++y) {
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let row = square[y];
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for (let z = 0; z < this.SIZE; ++z) {
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let point = row[z];
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let tr = createElement(table, 'tr');
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createElement(tr, 'td', x);
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createElement(tr, 'td', y);
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createElement(tr, 'td', z);
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point.addColorCells(tr);
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}
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}
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}
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}
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}
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