From: Robert Kaiser Date: Sun, 18 Dec 2011 00:49:58 +0000 (+0100) Subject: add lantea and mandelbrot apps X-Git-Tag: production~23 X-Git-Url: https://git-public.kairo.at/?p=mandelbrot-web.git;a=commitdiff_plain;h=6a7aa57d0bffbcea1bb023ceb86dd47d8710214b;hp=1dffd32b53cf554b5a94af2decff69229423608a add lantea and mandelbrot apps --- diff --git a/index.html b/index.html new file mode 100644 index 0000000..32648f7 --- /dev/null +++ b/index.html @@ -0,0 +1,50 @@ + + + + + KaiRo.at Mandelbrot Web + + + + +

KaiRo.at Mandelbrot Web

+ +

+ + +

Image data +Image coordinates: +
Real: +Min: +Max: +
Imag: +Min: +Max: + +
Maximum of iterations: + + +
Color palette: + +

+ +

Time taken for calculation: none yet

+ + \ No newline at end of file diff --git a/js/mandelbrot.js b/js/mandelbrot.js new file mode 100644 index 0000000..ed49cc4 --- /dev/null +++ b/js/mandelbrot.js @@ -0,0 +1,274 @@ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is KaiRo.at Mandelbrot, XULRunner version. + * + * The Initial Developer of the Original Code is + * Robert Kaiser . + * Portions created by the Initial Developer are Copyright (C) 2008-210 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Robert Kaiser + * Boris Zbarsky + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +var gColorPalette = []; +var gStartTime = 0; + +function drawImage() { + var canvas = document.getElementById("mbrotImage"); + var context = canvas.getContext("2d"); + + document.getElementById("calcTime").textContent = "--"; + + gColorPalette = getColorPalette(document.getElementById("palette").value); + + var Cr_min = -2.0; + var Cr_max = 1.0; + try { + Cr_min = parseFloat(document.getElementById("Cr_min").value); + Cr_max = parseFloat(document.getElementById("Cr_max").value); + } + catch (e) { } + if ((Cr_min < -2) || (Cr_min > 2) || + (Cr_max < -2) || (Cr_max > 2) || (Cr_min >= Cr_max)) { + Cr_min = -2.0; Cr_max = 1.0; + } + document.getElementById("Cr_min").value = Cr_min; + document.getElementById("Cr_max").value = Cr_max; + + var Ci_min = -1.5; + var Ci_max = 1.5; + try { + Ci_min = parseFloat(document.getElementById("Ci_min").value); + Ci_max = parseFloat(document.getElementById("Ci_max").value); + } + catch (e) { } + if ((Ci_min < -2) || (Ci_min > 2) || + (Ci_max < -2) || (Ci_max > 2) || (Ci_min >= Ci_max)) { + Ci_min = -1.5; Ci_max = 1.5; + } + document.getElementById("Ci_min").value = Ci_min; + document.getElementById("Ci_max").value = Ci_max; + + //var algorithm = gPref.getCharPref("mandelbrot.use_algorithm"); + var iterMax = parseInt(document.getElementById("iterMax").value); + var algorithm = "numeric"; //"oo" + + var iWidth = canvas.width; + if ((iWidth < 10) || (iWidth > 5000)) { + iWidth = 300; + canvas.width = iWidth; + } + var iHeight = canvas.height; + if ((iHeight < 10) || (iHeight > 5000)) { + iHeight = 300; + canvas.height = iHeight; + } + + context.fillStyle = "rgba(255, 255, 255, 127)"; + context.fillRect(0, 0, canvas.width, canvas.height); + + gStartTime = new Date(); + + drawLine(0, [Cr_min, Cr_max, Ci_min, Ci_max], + canvas, context, iterMax, algorithm); +} + +function drawLine(line, dimensions, canvas, context, iterMax, algorithm) { + var Cr_min = dimensions[0]; + var Cr_max = dimensions[1]; + var Cr_scale = Cr_max - Cr_min; + + var Ci_min = dimensions[2]; + var Ci_max = dimensions[3]; + var Ci_scale = Ci_max - Ci_min; + + var lines = Math.min(canvas.height - line, 8); + var imageData = context.createImageData(canvas.width, lines); + var pixels = imageData.data; + var idx = 0; + for (var img_y = line; img_y < canvas.height && img_y < line+8; img_y++) + for (var img_x = 0; img_x < canvas.width; img_x++) { + var C = new complex(Cr_min + (img_x / canvas.width) * Cr_scale, + Ci_min + (img_y / canvas.height) * Ci_scale); + var colors = drawPoint(context, img_x, img_y, C, iterMax, algorithm); + pixels[idx++] = colors[0]; + pixels[idx++] = colors[1]; + pixels[idx++] = colors[2]; + pixels[idx++] = colors[3]; + } + context.putImageData(imageData, 0, line); + + if (img_y < canvas.height) + setTimeout(drawLine, 0, img_y, dimensions, canvas, context, iterMax, algorithm); + else if (gStartTime) + EndCalc(); +} + +function EndCalc() { + var endTime = new Date(); + var timeUsed = (endTime.getTime() - gStartTime.getTime()) / 1000; + document.getElementById("calcTime").textContent = timeUsed.toFixed(3) + " seconds"; +} + +function complex(aReal, aImag) { + this.r = aReal; + this.i = aImag; +} +complex.prototype = { + square: function() { + return new complex(this.r * this.r - this.i * this.i, + 2 * this.r * this.i); + }, + dist: function() { + return Math.sqrt(this.r * this.r + this.i * this.i); + }, + add: function(aComplex) { + return new complex(this.r + aComplex.r, this.i + aComplex.i); + } +} + +function mandelbrotValueOO (aC, aIterMax) { + // this would be nice code in general but it looks like JS objects are too heavy for normal use. + var Z = new complex(0.0, 0.0); + for (var iter = 0; iter < aIterMax; iter++) { + Z = Z.square().add(aC); + if (Z.r * Z.r + Z.i * Z.i > 256) { break; } + } + return iter; +} + +function mandelbrotValueNumeric (aC, aIterMax) { + // optimized numeric code for fast calculation + var Cr = aC.r, Ci = aC.i; + var Zr = 0.0, Zi = 0.0; + var Zr2 = Zr * Zr, Zi2 = Zi * Zi; + for (var iter = 0; iter < aIterMax; iter++) { + Zi = 2 * Zr * Zi + Ci; + Zr = Zr2 - Zi2 + Cr; + + Zr2 = Zr * Zr; Zi2 = Zi * Zi; + if (Zr2 + Zi2 > 256) { break; } + } + return iter; +} + +function getColor(aIterValue, aIterMax) { + var standardizedValue = Math.round(aIterValue * 1024 / aIterMax); + if (gColorPalette && gColorPalette.length) + return gColorPalette[standardizedValue]; + + // fallback to simple b/w if for some reason we don't have a palette + if (aIterValue == aIterMax) + return [0, 0, 0, 255]; + else + return [255, 255, 255, 255]; +} + +function getColorPalette(palName) { + var palette = []; + switch (palName) { + case 'bw': + for (var i = 0; i < 1024; i++) { + palette[i] = [255, 255, 255, 255]; + } + palette[1024] = [0, 0, 0, 255]; + break; + case 'kairo': + // outer areas + for (var i = 0; i < 32; i++) { + var cc1 = Math.floor(i * 127 / 31); + var cc2 = 170 - Math.floor(i * 43 / 31); + palette[i] = [cc1, cc2, cc1, 255]; + } + // inner areas + for (var i = 0; i < 51; i++) { + var cc = Math.floor(i * 170 / 50); + palette[32 + i] = [cc, 0, (170-cc), 255]; + } + // corona + for (var i = 0; i < 101; i++) { + var cc = Math.floor(i * 200 / 100); + palette[83 + i] = [255, cc, 0, 255]; + } + // inner corona + for (var i = 0; i < 201; i++) { + var cc1 = 255 - Math.floor(i * 85 / 200); + var cc2 = 200 - Math.floor(i * 30 / 200); + var cc3 = Math.floor(i * 170 / 200); + palette[184 + i] = [cc1, cc2, cc3, 255]; + } + for (var i = 0; i < 301; i++) { + var cc1 = 170 - Math.floor(i * 43 / 300); + var cc2 = 170 + Math.floor(i * 85 / 300); + palette[385 + i] = [cc1, cc1, cc2, 255]; + } + for (var i = 0; i < 338; i++) { + var cc = 127 + Math.floor(i * 128 / 337); + palette[686 + i] = [cc, cc, 255, 255]; + } + palette[1024] = [0, 0, 0, 255]; + break; + case 'rainbow-linear1': + for (var i = 0; i < 256; i++) { + palette[i] = [i, 0, 0, 255]; + palette[256 + i] = [255, i, 0, 255]; + palette[512 + i] = [255 - i, 255, i, 255]; + palette[768 + i] = [i, 255-i, 255, 255]; + } + palette[1024] = [0, 0, 0, 255]; + break; + } + return palette; +} + +function drawPoint(context, img_x, img_y, C, iterMax, algorithm) { + var itVal; + switch (algorithm) { + case 'oo': + itVal = mandelbrotValueOO(C, iterMax); + break; + case 'numeric': + default: + itVal = mandelbrotValueNumeric(C, iterMax); + break; + } + return getColor(itVal, iterMax); +} + +// ########## UI functions ########## + +function toggleSettings() { + var fs = document.getElementById("settings"); + if (fs.style.display != "block") { + fs.style.display = "block"; + } + else { + fs.style.display = "none"; + } +} \ No newline at end of file diff --git a/manifest.appcache b/manifest.appcache new file mode 100644 index 0000000..985e6b0 --- /dev/null +++ b/manifest.appcache @@ -0,0 +1,12 @@ +CACHE MANIFEST + +# / +index.html +manifest.webapp +js/mandelbrot.js +style/mandelbrot.css +style/mandelbrotIcon16.png +style/mandelbrotIcon32.png + +NETWORK: + diff --git a/manifest.webapp b/manifest.webapp new file mode 100644 index 0000000..9028c6f --- /dev/null +++ b/manifest.webapp @@ -0,0 +1,13 @@ +{ + "name": "KaiRo.at Mandelbrot Web", + "description": "Mandelbrot web viewer", + "launch_path": "/index.html", + "developer": { + "name": "Robert Kaiser", + "url": "http://www.kairo.at/" + }, + "icons": { + "16": "style/mandelbrotIcon16.png", + "32": "style/mandelbrotIcon32.png" + } +} \ No newline at end of file diff --git a/style/mandelbrot.css b/style/mandelbrot.css new file mode 100644 index 0000000..5e3cade --- /dev/null +++ b/style/mandelbrot.css @@ -0,0 +1,16 @@ +#overlayArea { + position: absolute; +} + +#settings { + display: none; +} + +#mainArea { + text-align: center; + margin: 1em 0; +} + +#mbrotImage { + background-color: lightblue; +} diff --git a/style/mandelbrotIcon16.png b/style/mandelbrotIcon16.png new file mode 100644 index 0000000..4e22313 Binary files /dev/null and b/style/mandelbrotIcon16.png differ diff --git a/style/mandelbrotIcon32.png b/style/mandelbrotIcon32.png new file mode 100644 index 0000000..3cfd60b Binary files /dev/null and b/style/mandelbrotIcon32.png differ