Created
May 8, 2011 05:17
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映画『ウォッチメン』のロールシャッハ仮面を作れないか実験中
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| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> | |
| <title>Rorschach Mask</title> | |
| <script type="text/javascript" src="rorschach.js"></script> | |
| </head> | |
| <body> | |
| <div align="center"><b>Rorschach Mask</b></div> | |
| <div id="div_id" align="center" style="padding:10px;"> | |
| <canvas id="canvas_element" width="300" height="300"></canvas> | |
| </div> | |
| <span id="canvas_xy"></span><br/> | |
| <!-- <img id="img_id"></img> --> | |
| </body> | |
| </html> |
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| // rorschach.js: | |
| function $(id) { return document.getElementById(id); } | |
| function Point(x, y) { return {'x':x, 'y':y}; } | |
| function rand(max) { return Math.round(Math.random()*max); } | |
| function format_rgb(r,g,b) { return 'rgb(' + r + ',' + g + ',' + b + ')'; } | |
| function make_cells(max_x, max_y) { | |
| var cells = []; | |
| for (var i=0; i<max_x; i++) { | |
| cells[i] = []; | |
| for (var j=0; j<max_y; j++) { | |
| cells[i][j] = rand(256); | |
| } | |
| } | |
| return cells; | |
| } | |
| function draw_cells(cells) { | |
| var canvas = $("canvas_element"); | |
| if ( !canvas || !canvas.getContext ) { | |
| return false; | |
| } | |
| var ctx = canvas.getContext('2d'); | |
| ctx.beginPath(); | |
| for (var i=0; i<cells.length; i++) { | |
| for (var j=0; j<cells[i].length; j++) { | |
| var color = format_rgb(cells[i][j], cells[i][j], cells[i][j]); | |
| /* var color; | |
| if (cells[i][j] > 127) | |
| color = format_rgb(255,255,255); | |
| else | |
| color = format_rgb(0,0,0);*/ | |
| ctx.strokeStyle = color; | |
| ctx.strokeRect(i, j, 1, 1); | |
| ctx.strokeRect(300 - i, j, 1, 1); | |
| } | |
| } | |
| ctx.closePath(); | |
| ctx.stroke(); | |
| } | |
| // cell automaton rules | |
| var old_cells = make_cells(150, 300); | |
| function neighborhood_average(cells, cx, cy) { | |
| var xm = (cx-1 + cells.length) % cells.length; | |
| var xp = (cx+1) % cells.length; | |
| var ym = (cy-1 + cells[cx].length) % cells[cx].length; | |
| var yp = (cy+1) % cells[cx].length; | |
| var temp = cells[xm][ym] + cells[cx][ym] + cells[xp][ym] + | |
| cells[xm][cy] + cells[xp][cy] + | |
| cells[xm][yp] + cells[cx][yp] + cells[xp][yp]; | |
| return Math.round(temp / 8.0); | |
| } | |
| function step(cells) { | |
| var next = []; | |
| for (var i=0; i<cells.length; i++) { | |
| next[i] = []; | |
| for (var j=0; j<cells[i].length; j++) { | |
| var avg = neighborhood_average(cells, i, j); | |
| next[i][j] = (Math.round((avg + (cells[i][j] - old_cells[i][j]) * 1.6))); | |
| } | |
| } | |
| old_cells = cells; | |
| return next; | |
| } | |
| // onload handler | |
| onload = function() { | |
| var cells = make_cells(150,300); | |
| draw_cells(cells); | |
| setInterval(function() { | |
| cells = step(cells); | |
| draw_cells(cells); | |
| }, 500); | |
| }; | |
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