{"id":332,"date":"2009-07-01T08:10:35","date_gmt":"2009-07-01T15:10:35","guid":{"rendered":"https:\/\/actionsnippet.com\/?p=1663"},"modified":"2009-07-01T08:10:35","modified_gmt":"2009-07-01T15:10:35","slug":"setvector-ca-texture","status":"publish","type":"post","link":"https:\/\/actionsnippet.com\/?p=332","title":{"rendered":"setVector() CA Texture"},"content":{"rendered":"<pre class=\"brush: as3; title: ; notranslate\" title=\"\">\r\n&#x5B;SWF(width=500, height=500)]\r\nvar canvasSize:int=stage.stageWidth;\r\nvar canvas:BitmapData=new BitmapData(canvasSize,canvasSize,false,0x000001);\r\naddChild(new Bitmap(canvas, &quot;auto&quot;, true));\r\nvar size:int=canvas.width*canvas.height - canvasSize;\r\nvar pixels:Vector.&lt;uint&gt;=canvas.getVector(canvas.rect);\r\nfor (var i:int = 0; i&lt;canvasSize; i++) {\r\n\tvar xp:int=int(Math.random()*canvasSize);\r\n\tvar yp:int=int(Math.random()*canvasSize);\r\n\tpixels&#x5B;xp+yp*canvasSize]=0xFF000000;\r\n}\r\nvar targetCol:uint=0xFF000000;\r\nvar buffer:Vector.&lt;uint&gt;=pixels.concat();\r\nvar fade:uint=1;\r\n\r\naddEventListener(Event.ENTER_FRAME, onLoop);\r\nfunction onLoop(evt:Event):void {\r\n\tvar curr:uint=targetCol;\r\n\tvar r:int = (curr &gt;&gt; 16) &amp; 0xFF;\r\n\tvar g:int = (curr &gt;&gt; 8) &amp; 0xFF;\r\n\tvar b:int=curr&amp;0xFF;\r\n\tr+=fade;\r\n\tg+=fade;\r\n\tb+=fade;\r\n\tif (r&gt;255) r=255;\r\n\tif (g&gt;255) g=255;\r\n\tif (b&gt;255) b=255;\r\n\tvar darker:uint=0xFF000000|r&lt;&lt;16|g&lt;&lt;8|b;\r\n\tif (darker==0xFFFFFFFF) {\r\n\t\tremoveEventListener(Event.ENTER_FRAME, onLoop);\r\n\t}\r\n\tfor (var i:int = canvasSize; i&lt;size; i++) {\r\n\t\tcurr=pixels&#x5B;i];\r\n\t\tif (curr==targetCol) {\r\n\t\t\tvar index:int=i-canvasSize+int(Math.random()*3) - 1;\r\n\t\t\tif (index&gt;0) buffer&#x5B;index]=darker;\r\n\t\t\tif (int(Math.random()*50)==1) {\r\n\t\t\t\tindex=i-canvasSize+int(Math.random()*3)-1;\r\n\t\t\t\tif (index&gt;0) buffer&#x5B;index]=darker;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\ttargetCol=darker;\r\n\tcanvas.lock();\r\n\tcanvas.setVector(canvas.rect, buffer);\r\n\tpixels=buffer.concat();\r\n\tcanvas.unlock();\r\n}\r\n<\/pre>\n<p>This snippet uses setVector() to draw something that looks like this:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/actionsnippet.com\/wp-content\/ca_setup.gif\" \/><\/p>\n<p>This is a cellular automaton. It has kind of a strange rule set &#8211; but you could easily use this snippet to do more traditional cellular automata.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#x5B;SWF(width=500, height=500)] var canvasSize:int=stage.stageWidth; var canvas:BitmapData=new BitmapData(canvasSize,canvasSize,false,0x000001); addChild(new Bitmap(canvas, &quot;auto&quot;, true)); var size:int=canvas.width*canvas.height &#8211; canvasSize; var pixels:Vector.&lt;uint&gt;=canvas.getVector(canvas.rect); for (var i:int = 0; i&lt;canvasSize; i++) { var xp:int=int(Math.random()*canvasSize); var yp:int=int(Math.random()*canvasSize); pixels&#x5B;xp+yp*canvasSize]=0xFF000000; } var targetCol:uint=0xFF000000; var buffer:Vector.&lt;uint&gt;=pixels.concat(); var fade:uint=1; addEventListener(Event.ENTER_FRAME, onLoop); function onLoop(evt:Event):void { var curr:uint=targetCol; var r:int = (curr &gt;&gt; 16) &amp; 0xFF; var g:int = [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,25,79],"tags":[3,14,4],"class_list":["post-332","post","type-post","status-publish","format-standard","hentry","category-bitmapdata","category-pixel-manipulation","category-vector","tag-actionscript","tag-as3","tag-flash"],"_links":{"self":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=332"}],"version-history":[{"count":0,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/332\/revisions"}],"wp:attachment":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}