{"id":228,"date":"2009-03-22T18:02:29","date_gmt":"2009-03-23T01:02:29","guid":{"rendered":"https:\/\/actionsnippet.com\/?p=1011"},"modified":"2009-03-22T18:02:29","modified_gmt":"2009-03-23T01:02:29","slug":"torus-3d","status":"publish","type":"post","link":"https:\/\/actionsnippet.com\/?p=228","title":{"rendered":"Torus 3D"},"content":{"rendered":"<pre class=\"brush: as3; title: ; notranslate\" title=\"\">\r\nstage.frameRate = 30;\r\nconst TWO_PI:Number = Math.PI * 2;\r\nvar centerX:Number = 200;\r\nvar centerY:Number = 200;\r\nvar p:Array = new Array();\r\nvar zpos:Number;\r\nvar xpos:Number;\r\nvar ypos:Number;\r\nvar depth:Number;\r\nvar canvas:BitmapData = new BitmapData(400,400,true,0xFF000000);\r\naddChild(new Bitmap(canvas));\r\n\r\nvar dy:Number = 0\r\nvar dx:Number = 0;\r\n \r\naddEventListener(Event.ENTER_FRAME, onLoop);\r\nfunction onLoop(evt:Event):void {\r\n\tcanvas.fillRect(canvas.rect, 0xFF000000);\r\n\t \r\n\t dx += (mouseX \/ 100 - dx)\/12;\r\n\t dy += (mouseY \/ 100 - dy)\/12;\r\n\t var xp:Number, yp:Number, zp:Number;\r\n\t \r\n\t canvas.lock();\r\n\t for (var a:Number =0; a &lt; TWO_PI; a+=.08){\r\n\t\t  for (var b:Number =0; b &lt; TWO_PI; b+=.08){\r\n\t\t\t  xp = (70 + 40 * Math.cos(a)) * Math.cos(b) ;\r\n\t\t\t  yp = (70 + 40 * Math.cos(a)) * Math.sin(b);\r\n\t\t\t  zp =  40 * Math.sin(a);\r\n\t\t\t  calc3D(xp, yp, zp, dx, dy);\r\n\t\t\t  convert3D();\r\n\t\t\t  canvas.setPixel(p&#x5B;0], p&#x5B;1], 0xFFFFFF);\r\n\t\t  }\r\n\t }\r\n\t canvas.unlock();\r\n}\r\nfunction calc3D(px:Number, py:Number, pz:Number, rotX:Number=0, rotY:Number=0):void {\r\n\t\/\/ I first learned this from code by Andries Odendaal - www.wireframe.co.za\r\n\tzpos=pz*Math.cos(rotX)-px*Math.sin(rotX) ;\r\n\txpos=pz*Math.sin(rotX)+px*Math.cos(rotX) ;\r\n\typos=py*Math.cos(rotY)-zpos*Math.sin(rotY) ;\r\n\tzpos=py*Math.sin(rotY)+zpos*Math.cos(rotY);\r\n}\r\nfunction convert3D():void {\r\n\tdepth = 1\/((zpos\/200)+1);\r\n\tp&#x5B;0] =  xpos * depth + centerX;\r\n\tp&#x5B;1] =  ypos * depth + centerY;\r\n}\r\n<\/pre>\n<p>This code draws a rotating 3D torus using setPixel().<\/p>\n","protected":false},"excerpt":{"rendered":"<p>stage.frameRate = 30; const TWO_PI:Number = Math.PI * 2; var centerX:Number = 200; var centerY:Number = 200; var p:Array = new Array(); var zpos:Number; var xpos:Number; var ypos:Number; var depth:Number; var canvas:BitmapData = new BitmapData(400,400,true,0xFF000000); addChild(new Bitmap(canvas)); var dy:Number = 0 var dx:Number = 0; addEventListener(Event.ENTER_FRAME, onLoop); function onLoop(evt:Event):void { canvas.fillRect(canvas.rect, 0xFF000000); dx += (mouseX [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101,24],"tags":[3,4],"class_list":["post-228","post","type-post","status-publish","format-standard","hentry","category-3d","category-bitmapdata","tag-actionscript","tag-flash"],"_links":{"self":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/228","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=228"}],"version-history":[{"count":0,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/228\/revisions"}],"wp:attachment":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}