155 lines
3.3 KiB
HTML
155 lines
3.3 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<title>loom</title>
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<script type="application/javascript">
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function Yarn(r, g, b) {
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var rgb = [Math.round(r*255), Math.round(g*255), Math.round(b*255)]
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return "rgb(" + rgb.join(",") + ")"
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}
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var colors = {
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"R": Yarn(0.50, 0.00, 0.00), // Red
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"G": Yarn(0.00, 0.40, 0.00), // Green
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"B": Yarn(0.00, 0.00, 0.50), // Blue
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"C": Yarn(0.00, 0.50, 0.50), // Cyan
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"Y": Yarn(0.80, 0.80, 0.00), // Yellow
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"P": Yarn(0.60, 0.00, 0.60), // Purple
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"W": Yarn(0.90, 0.90, 0.90), // White
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"K": Yarn(0.00, 0.00, 0.00), // Black
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"BK": Yarn(0.00, 0.00, 0.00), // Black
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"GR": Yarn(0.50, 0.50, 0.50), // Gray
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"DB": Yarn(0.00, 0.00, 0.30), // Dark Blue
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"LB": Yarn(0.00, 0.40, 0.90), // Light Blue
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"LR": Yarn(0.80, 0.00, 0.00), // Light Red
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"LG": Yarn(0.00, 0.60, 0.00), // Light Green
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"LV": Yarn(0.50, 0.25, 0.60), // Lavender
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"BR": Yarn(0.60, 0.40, 0.20), // Brown
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"LGR": Yarn(0.60, 0.60, 0.60), // Light Gray
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"LBR": Yarn(0.80, 0.70, 0.50), // Light Brown
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"": ""
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}
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function Loom(ctx, warp) {
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ctx.lineWidth = 3;
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for (var x in warp) {
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var yarn = warp[x];
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ctx.strokeStyle = yarn;
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ctx.beginPath();
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ctx.moveTo(x*ctx.lineWidth, 0);
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ctx.lineTo(x*ctx.lineWidth, 600);
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ctx.stroke();
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}
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this.nrows = 0;
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this.warp = warp;
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this.weave = function(yarn, up, down, skip, repeat) {
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up = up || 1
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down = down || 1
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skip = skip || 0
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repeat = repeat || 0
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ctx.strokeStyle = yarn;
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var offset = (this.nrows / (repeat + 1)) * (skip + 1);
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var harness = up + down;
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var row = [];
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for (var x = 0; x < this.warp.length; x += 1) {
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var ox = (x + offset) % harness
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if (ox < up) {
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ctx.beginPath();
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ctx.moveTo(x*ctx.lineWidth, this.nrows*ctx.lineWidth);
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ctx.lineTo((x+1)*ctx.lineWidth, this.nrows*ctx.lineWidth);
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ctx.stroke();
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}
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}
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this.nrows += 1;
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}
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this.plainWeave = function(yarn) {
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this.weave(yarn);
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}
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this.twill = function(yarn, width) {
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this.weave(yarn, width || 2, width || 2);
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}
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this.satinWeave = function(yarn) {
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// 1/16, skip 4
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this.weave(yarn, 1, 16, 4);
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}
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this.basketWeave = function(yarn) {
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// 2/2, skip 1, repeat 1
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this.weave(yarn, 2, 2, 1, 1);
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}
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this.plaid = function() {
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for (var i in this.warp) {
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this.twill(this.warp[i]);
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}
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}
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}
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var sett_re = /([A-Za-z]{1,3}|\([A-Fa-f0-9]{3}\))(\d{1,3})/;
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function settOfString(str) {
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var sett = []
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while (str.length > 0) {
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var result = sett_re.exec(str);
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if (result == null) {
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break
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}
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var color;
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var cs = result[1];
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if (cs[0] == "(") {
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color = "#" + cs.substr(1, cs.length-2);
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} else {
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color = colors[cs];
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}
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for (var i = 0; i < result[2]; i += 1) {
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sett.push(color);
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}
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str = str.substr(result[0].length + result.index);
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}
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if (str[str.length - 1] == ".") {
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var ttes = sett.reverse();
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sett = sett.concat(ttes);
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}
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if (sett.length % 4 != 0) {
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sett = sett.concat(sett);
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}
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return sett;
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}
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function weave(pattern) {
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var canvas = document.getElementById("loom");
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var ctx = canvas.getContext("2d");
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var sett = settOfString(pattern);
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var l = new Loom(ctx, sett);
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l.plaid();
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}
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function krang() {
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weave("LG8 LV32 R4 G32 LG32 Y4 LG4");
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}
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window.onload = krang;
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</script>
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</head>
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<body>
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<h1>Loom</h1>
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<canvas id="loom" width="600" height="600">
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Sorry, you need HTML5 and JavaScript for this.
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</canvas>
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</body>
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</html>
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