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var myFont = JSON.parse('{"a":{"w":4,"h":"00699970"},"b":{"w":4,"h":"88e999e0"},"c":{"w":4,"h":"00788870"},"d":{"w":4,"h":"11799970"},"e":{"w":4,"h":"0069f870"},"f":{"w":4,"h":"34f44440"},"g":{"w":4,"h":"00699971e0"},"h":{"w":4,"h":"88e99990"},"i":{"w":1,"h":"be"},"j":{"w":2,"h":"455580"},"k":{"w":4,"h":"889aca90"},"l":{"w":1,"h":"fe"},"m":{"w":5,"h":"003d5ad6a0"},"n":{"w":4,"h":"00e99990"},"o":{"w":4,"h":"00699960"},"p":{"w":4,"h":"00e999e880"},"q":{"w":4,"h":"0079997110"},"r":{"w":4,"h":"00698880"},"s":{"w":4,"h":"007861e0"},"t":{"w":4,"h":"44f44430"},"u":{"w":4,"h":"00999970"},"v":{"w":4,"h":"00999960"},"w":{"w":5,"h":"002b5ad540"},"x":{"w":5,"h":"0022a22a20"},"y":{"w":4,"h":"00999971e0"},"z":{"w":4,"h":"00f248f0"}," ":{"w":3,"h":"00"},",":{"w":2,"h":"003d80"},".":{"w":2,"h":"003c00"},"A":{"w":5,"h":"74631fc620"},"B":{"w":5,"h":"f463e8c7c0"},"C":{"w":5,"h":"74610845c0"},"D":{"w":5,"h":"f46318c7c0"},"E":{"w":5,"h":"fc21e843e0"},"F":{"w":5,"h":"fc21e84200"},"G":{"w":5,"h":"746178c5c0"},"H":{"w":5,"h":"8c63f8c620"},"I":{"w":3,"h":"e924b8"},"J":{"w":5,"h":"084218c5c0"},"K":{"w":5,"h":"8ca98a4a20"},"L":{"w":5,"h":"84210843e0"},"M":{"w":5,"h":"8eeb18c620"},"N":{"w":5,"h":"8c7359c620"},"O":{"w":5,"h":"746318c5c0"},"P":{"w":5,"h":"f463e84200"},"Q":{"w":5,"h":"74631acdc0"},"R":{"w":5,"h":"f463ea4a20"},"S":{"w":5,"h":"7460e0c5c0"},"T":{"w":5,"h":"f908421080"},"U":{"w":5,"h":"8c6318c5c0"},"V":{"w":5,"h":"8c6318a880"},"W":{"w":5,"h":"8c6b5ad540"},"X":{"w":5,"h":"8c54454620"},"Y":{"w":5,"h":"8c54421080"},"Z":{"w":5,"h":"f8444443e0"}}'); var led = (function () { var _s = {}, //public member container cnst = { PIXEL_SIZE: 10, PIXEL_GAP: 3, MARGIN: 5.5, TOP_BUFFER: 2, PIXEL_RADIUS: 5 }, c, pb = [], pixelsHigh, pixelsWide, idxPos = 0, ks = false, pbPop = false, timeout = 51, cti = null; _s.opts = { disco: false }; _s.clrOn = "#F22"; _s.clrOff = "#311"; var init = function () { try { c = $("#led")[0].getContext("2d"); } catch (e) { throw new Error("You browser is not supported. HTML5
required."); return; } c.lineWidth = 0; c.fillStyle = _s.clrOn; pixelsWide = parseInt(($("#led").innerWidth() - (cnst.MARGIN * 2)) / (cnst.PIXEL_SIZE + cnst.PIXEL_GAP)); pixelsHigh = parseInt(($("#led").innerHeight() - (cnst.MARGIN * 2)) / (cnst.PIXEL_SIZE + cnst.PIXEL_GAP)); return true; } var showBlank = function () { c.fillStyle = getOffColour(); var pixelSize = cnst.PIXEL_SIZE + cnst.PIXEL_GAP; for (var i = 0; i <= pixelsWide; i++) { for (var k = 0; k <= pixelsHigh; k++) { var x = (i * pixelSize) + cnst.MARGIN + cnst.PIXEL_RADIUS; var y = (k * pixelSize) + cnst.MARGIN + cnst.PIXEL_RADIUS; drawPixel(x, y); } } }; var getRandomBrightColour = function () { var getRandomHex = function () { return (parseInt(Math.random() * 196) + 64).toString(16); } return "#" + getRandomHex() + getRandomHex() + getRandomHex(); } var getOnColour = function () { if (_s.opts.disco) { return "#000"; } return _s.clrOn; } var getOffColour = function () { if (_s.opts.disco) { return getRandomBrightColour(); } return _s.clrOff; } var writeMessageToBuffer = function (msg) { if (typeof msg != "string") msg = msg.toString(); pb = new Array(pixelsHigh); for (var p = 0; p < pb.length; p++) { pb[p] = new Array(); } for (var i = 0; i < msg.length; i++) { var ch = msg.charAt(i), l; ch = ch.replace(/[^a-zA-Z\s\.,]/g, ""); //drop everything that is not lowercase char or space. if (ch == "") continue; if ((l = _s.getLetter(ch))) { var charWidth = l[0].length; for (var k = 0; k < pixelsHigh; k++) { if (k >= l.length) { //write blank lines to matrix for (var z = 0; z < (charWidth + 1); z++) { pb[k].push(0); } } else { //copy matrix for letter into buffer pb[k] = pb[k].concat(l[k], [0]); } } } } pbPop = true; }; _s.getLetter = function (let) { var h = myFont[let], bin = [], out = [], i; if (!h) return false; var htba = function (h) { h = parseInt(h, 16); var s = 128, i, b = [], r; for (i = 0; i < 8; i++) { if ((r = Math.floor(h / s))) h = h - s; s = s / 2; b.push(r); } return b; } for (i = 0; i < h.h.length; i += 2) { bin = bin.concat(htba(h.h.substr(i, 2))); } while (bin.length >= h.w) { out.push(bin.splice(0, h.w)); } if (out.length > 1 && out[out.length - 1].indexOf(1) == -1) { out.pop(); } return out; }; var beginScrollMsg = function () { idxPos = 0; if (cti != null) { window.clearTimeout(cti); cti = null; } renderMsg(idxPos); }; var scrollMsg = function () { idxPos++; if (idxPos > pb[0].length + pixelsWide) idxPos = 0; renderMsg(idxPos); }; var renderMsg = function (pos) { var pixelSize = cnst.PIXEL_SIZE + cnst.PIXEL_GAP; var ms = pixelsWide - pos; var canvas = $("#led")[0]; canvas.width = canvas.width; for (var i = 0; i <= pixelsWide; i++) { for (var k = 0; k <= pixelsHigh; k++) { c.fillStyle = getOffColour(); if (i >= ms) { if (k >= cnst.TOP_BUFFER) { if (pb[k - cnst.TOP_BUFFER][i - ms] == 1) { c.fillStyle = getOnColour(); } } } var x = (i * pixelSize) + cnst.MARGIN + cnst.PIXEL_RADIUS; var y = (k * pixelSize) + cnst.MARGIN + cnst.PIXEL_RADIUS; drawPixel(x, y); } } if (ks) { cti = window.setTimeout(scrollMsg, timeout); } }; var drawPixel = function (x, y) { c.beginPath(); c.arc(x, y, Math.round(cnst.PIXEL_SIZE / 2), 0, 2 * Math.PI, false); c.fill(); }; _s.stop = function () { ks = false; }; _s.start = function () { ks = true; if (!pbPop) return; beginScrollMsg(); }; _s.setText = function (txt) { showBlank(); if (typeof txt == "undefined") writeMessageToBuffer($("#msgText").val()); else writeMessageToBuffer(txt); ks = true; beginScrollMsg(); }; _s.slowScroll = function () { if (timeout < 500) timeout += 25; }; _s.fastScroll = function () { if (timeout > 1) timeout -= 25; }; _s.setInt = function (val) { if (val > 0 && val < 1000) { timeout = val; } }; _s.randomColour = function () { var pickOne = function () { var clrs = [ "#F22,#311", "#22F,#113", "#FF2,#331", "#F2F,#313", "#2F2,#131", ]; return clrs[Math.floor(Math.random() * clrs.length)]; } var result; do { //nothing needed here } while (_s.clrOn + "," + _s.clrOff == (result = pickOne())); result = result.split(","); _s.clrOn = result[0]; _s.clrOff = result[1]; }; init(); return _s; //return public methods (if any) })(); $(document).ready(function () { $("#setText").click(function () { led.setText($("#msgText").val()) }); $("#disco").click(function () { led.opts.disco = !led.opts.disco }); $("#slowScroll").click(led.slowScroll); $("#fastScroll").click(led.fastScroll); $("#ledColour").bind("change", function () { var slt = this.options[this.selectedIndex].value.split(","); led.clrOn = slt[0]; led.clrOff = slt[1]; }); led.setText($("#msgText").val()); });
LED Scroller
Change speed:
Disco mode:
Change color:
Red
Green
Blue
Yellow
Purple
body { margin:0; background-color:#000; font-family:sans-serif; color:#fff; } #led { background-color:#000; } #controls input { font-size:1.4em; } #controls { text-align:center; width:800px; } #controls>table { width:100%; } #ledColour { font-weight:bold; } td.left { text-align:right; } td { text-align:left; } #msgText { width: 400px; }
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