{"id":419,"date":"2009-10-01T10:37:40","date_gmt":"2009-10-01T17:37:40","guid":{"rendered":"https:\/\/actionsnippet.com\/?p=2268"},"modified":"2009-10-01T10:37:40","modified_gmt":"2009-10-01T17:37:40","slug":"quickbox2d-mini-machine","status":"publish","type":"post","link":"https:\/\/actionsnippet.com\/?p=419","title":{"rendered":"QuickBox2D Mini-Machine"},"content":{"rendered":"<p>Since this is a rather large snippet check out this demo first:<br \/>\n<a data-asruffle-linked=\"true\" href=\"http:\/\/www.actionsnippet.com\/swfs\/qb2d_machine.html\" target = \"blank\"><br \/>\nView Demo&#8230;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/actionsnippet.com\/wp-content\/qmachine.gif\" \/><\/a> <span class=\"asruffle-link\" data-swf=\"{&quot;url&quot;:&quot;https:\\\/\\\/actionsnippet.com\\\/swfs\\\/qb2d_machine.swf&quot;,&quot;title&quot;:&quot;qb2d machine&quot;,&quot;width&quot;:800,&quot;height&quot;:600,&quot;missing&quot;:false,&quot;allowScriptAccess&quot;:false,&quot;backgroundColor&quot;:&quot;#000000&quot;}\"><button type=\"button\" hidden aria-expanded=\"false\">Play demo<span class=\"screen-reader-text\">: qb2d machine<\/span><\/button><\/span><\/p>\n<p>and here is the source:<\/p>\n<pre class=\"brush: as3; title: ; notranslate\" title=\"\">\r\nimport com.actionsnippet.qbox.*\r\nimport Box2D.Collision.Shapes.*;\r\nimport Box2D.Common.Math.*;\r\n\r\n&#x5B;SWF(width = 800, height = 600, backgroundColor = 0x000000, frameRate = 60)]\r\n\r\nvar sim:QuickBox2D = new QuickBox2D(this, {debug:true});\r\n \r\nvar sw:Number = stage.stageWidth \/ 30;\r\nvar sh:Number = stage.stageHeight \/ 30;\r\n\t\t\t\r\nsim.addBox({x:sw \/ 2, y:sh, width:sw - 3, height:1,  density:.0})\r\nsim.addBox({x:sw \/ 2, y:0, width:sw - 3, height:1,  density:.0 })\r\nsim.addBox({x:0, y:sh \/ 2, width:1, height:sh ,  density:.0})  \r\nsim.addBox({x:sw, y:sh \/ 2, width:1, height:sh,  density:.0})  \r\n\r\nvar slider:QuickObject = sim.addBox({x:3, y:6, width:6, height:0.25, density:0, angle:0.05});\r\nvar pusher:QuickObject = sim.addBox({x:15, y:18, width:4, height:4, density:0});\r\n\r\nsim.setDefault({collideConnected:false, frequencyHz:10});\r\nvar anchor:QuickObject = sim.addCircle({x:3, y:2, radius:0.2, density:0});\r\n\r\nvar m0:QuickObject = sim.addBox({x:3, y:5, width:1, height:0.25, fixedRotation:true});\r\n\r\nvar j0:QuickObject = sim.addJoint({type:&quot;distance&quot;, a:anchor.body, b:m0.body});\r\n\r\nvar m1:QuickObject = sim.addBox({x:2.5, y:9.5, width:0.25, height:6, fixedRotation:true});\r\nvar m2:QuickObject = sim.addBox({x:3.5, y:9.5, width:0.25, height:6, fixedRotation:true});\r\n\r\nvar j1:QuickObject = sim.addJoint({type:&quot;distance&quot;, a:m0.body, b:m1.body});\r\nvar j2:QuickObject = sim.addJoint({type:&quot;distance&quot;, a:m0.body, b:m2.body});\r\nvar j3:QuickObject = sim.addJoint({type:&quot;distance&quot;, a:m2.body, b:m1.body});\r\n\r\nvar boxes:Array = &#x5B;];\r\nvar boxNum:int = 21;\r\nvar index:int = boxNum;\r\nvar filter:b2FilterData;\r\nvar lookupQuickObject:Dictionary = new Dictionary();\r\nfor (var i:int = 0; i&lt;boxNum; i++){\r\n\tboxes&#x5B;i] = sim.addBox({x:3, y:6.3 + i * 0.3, width:0.6, height:0.3,  friction:0.0, allowSleep:false});\r\n\tlookupQuickObject&#x5B;boxes&#x5B;i].shape] = boxes&#x5B;i];\r\n}\r\n\r\nvar m3:QuickObject = sim.addBox({x:3, y:12.25 , width:1, height:0.25, allowSleep:false,fixedRotation:true, groupIndex:-1});\r\n\r\nvar j4:QuickObject = sim.addJoint({type:&quot;revolute&quot;, a:m1.body, b:m3.body});\r\nvar j5:QuickObject = sim.addJoint({type:&quot;revolute&quot;, a:m2.body, b:m3.body});\r\n\r\nvar t:Number = Math.PI;\r\nvar dropBox:int = 0;\r\nvar prevBox:QuickObject;\r\nvar resetVec:b2Vec2 = new b2Vec2(0,0);\r\n\r\nfunction setGroupIndex(b:QuickObject, index:int):void{\r\n\tfilter = b.shape.GetFilterData();\r\n\tfilter.groupIndex = index;\r\n\tb.shape.SetFilterData(filter);\r\n}\r\n\r\nsim.start();\r\nsim.addEventListener(QuickBox2D.STEP, onStep);\r\nfunction onStep(evt:Event):void{\r\n\tdropBox++;\r\n\t\r\n\tif (dropBox % 80 == 0){\r\n\t\tindex--;\r\n\t\tif (index &gt; -1){\r\n\t\t\tif (prevBox){\r\n\t\t\t\tsetGroupIndex(prevBox, 1);\r\n\t\t\t}\r\n\t\t\tprevBox = boxes&#x5B;index]\r\n\t\t\tsetGroupIndex(boxes&#x5B;index], -1);\r\n\t\t\tm3.y += 0.05;\r\n\t\t}\r\n\t}\r\n\t\r\n\tif (index &lt; 0){\r\n\t\tif (pusher.x &gt; 3.5){\r\n\t\t\tpusher.x -= 0.05;\r\n\t\t}\r\n\t}\r\n\tfor (var i:int = 0; i&lt;boxNum; i++){\r\n\t\tif (boxes&#x5B;i].y &gt; 22){\r\n\t\t\tboxes&#x5B;i].angle = 0;\r\n\t\t\tboxes&#x5B;i].y = -2;\r\n\t\t\tboxes&#x5B;i].x = 1;\r\n\t\t\tboxes&#x5B;i].body.SetLinearVelocity(resetVec);\r\n\t\t}\r\n\t}\r\n\t\r\n\tif (index &gt; 0){\r\n\t  anchor.x = 6 + 3 * Math.cos(t);\r\n\t  t += 0.01;\r\n\t}\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Since this is a rather large snippet check out this demo first: View Demo&#8230; Play demo: qb2d machine and here is the source: import com.actionsnippet.qbox.* import Box2D.Collision.Shapes.*; import Box2D.Common.Math.*; &#x5B;SWF(width = 800, height = 600, backgroundColor = 0x000000, frameRate = 60)] var sim:QuickBox2D = new QuickBox2D(this, {debug:true}); var sw:Number = stage.stageWidth \/ 30; var sh:Number [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,12],"tags":[3,14,15,4,16],"class_list":["post-419","post","type-post","status-publish","format-standard","hentry","category-box2d","category-quickbox2d","tag-actionscript","tag-as3","tag-box2d","tag-flash","tag-quickbox2d"],"_links":{"self":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/419","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=419"}],"version-history":[{"count":0,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=\/wp\/v2\/posts\/419\/revisions"}],"wp:attachment":[{"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/actionsnippet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}