[SWF(width='700',height='500',backgroundColor='0xBBBBBB',frameRate='30')]
          public class @ax-flex-fisix-4 extends MovieClip{
                  private var myEngine:FisixEngine
                  private var txtFPS:TextField
                  private var cDMode:int = 0
                  private var cRMode:int = 0
                  var txtDetectionMode:TextField
                  var txtReactionMode:TextField
                  
                  public function @ax-flex-fisix-4(){
                          //first, create an instance of the fisixengine object
                          myEngine = new FisixEngine()
                          
                          //bound all of the objects in the simulation within a box
                          myEngine.setBounds(new BoundingBox(0,0,700,500))
                          //enable collisions with the bounding box
                          myEngine.boundsCollisions=false
                          
                          //set the gravity to pull down at a rate of 1 pixel per second
                          myEngine.setGravity(0,2)
                          
                          //create some surfaces
                          myEngine.newSurface(new Vector(100,350),new Vector(300,300),4)
                          myEngine.newSurface(new Vector(300,300),new Vector(500,350),4)
                          
                          //turn on primitive rendering
                          myEngine.setRender(true)
                          //tell the engine where to render to
                          myEngine.setRenderGraphics(graphics)
  
                          addEventListener(Event.ENTER_FRAME,onEnterFrame)
  
                          stage.addEventListener(KeyboardEvent.KEY_DOWN,onKeyDown)
                          
                          txtFPS = new TextField()
                          addChild(txtFPS)
                          
                          //create some gui
                          txtDetectionMode = new TextField()
                          txtReactionMode = new TextField()
                          
                          txtDetectionMode.x = 20
                          txtDetectionMode.width = 200
                          
                          txtReactionMode.x = 300
                          txtReactionMode.width = 200
                          
                          var txtInstructions:TextField = new TextField()
                          txtInstructions.text = "Instructions: Press 1-4 to cycle through collision detection modes.\nPress 5-6 to cycle through collision reaction modes."
                          txtInstructions.y=450
                          txtInstructions.width = 500
                          
                          addChild(txtDetectionMode)
                          addChild(txtReactionMode)
                          addChild(txtInstructions)
                          
                          //myEngine.setDetectionMode(DetectionModes.RAYCAST)
                  }
                  private function onEnterFrame(e:Event):void{
                          //create particles randomly
                          var rnd:Number = Math.round(Math.random()*5)
                          if(rnd==1){
                                  var rad:Number = Math.random()*10+1
                                  var cParticle:AutoRemoveParticle = new AutoRemoveParticle(Math.random()*700,rad,rad)
                                  myEngine.addObject(cParticle)
                          }
                          
                          myEngine.mainLoop(1)
  
                          txtFPS.text = int(myEngine.getRealFPS()).toString()
                          
                          cDMode = myEngine.getDetectionMode()
                          //update the detection and reaction mode text
                          txtDetectionMode.text = "Detection Mode: "
                          if(cDMode==DetectionModes.PENETRATION){
                                  txtDetectionMode.appendText("PENETRATION")
                          }else if(cDMode==DetectionModes.LIMIT_VELOCITY){
                                  txtDetectionMode.appendText("LIMIT_VELOCITY")
                          }else if(cDMode==DetectionModes.RAYCAST){
                                  txtDetectionMode.appendText("RAYCAST")
                          }else if(cDMode==DetectionModes.HYBRID_RAYCAST){
                                  txtDetectionMode.appendText("HYBRID_RAYCAST")
                          }
                          
                          
                          cRMode = myEngine.getReactionMode()
                          txtReactionMode.text = "Reaction Mode: "
                          if(cRMode==ReactionModes.NONE){
                                  txtReactionMode.appendText("NONE")
                          }else if(cRMode==ReactionModes.PHYSICAL){
                                  txtReactionMode.appendText("PHYSICAL")
                          }
                  }
                  
                  private function onKeyDown(e:KeyboardEvent):void{
                          if(e.keyCode==49){
                                  myEngine.setAllDetectionModes(DetectionModes.PENETRATION)
                          }else if(e.keyCode==50){
                                  myEngine.setAllDetectionModes(DetectionModes.LIMIT_VELOCITY)
                          }else if(e.keyCode==51){
                                  myEngine.setAllDetectionModes(DetectionModes.RAYCAST)
                          }else if(e.keyCode==52){
                                  myEngine.setAllDetectionModes(DetectionModes.HYBRID_RAYCAST)
                          }
                          
                          if(e.keyCode==53){
                                  myEngine.setAllReactionModes(ReactionModes.NONE)
                          }else if(e.keyCode==54){
                                  myEngine.setAllReactionModes(ReactionModes.PHYSICAL)
                          }
                  }
          }
  }