Flash物理引擎演示效果：

/Files/hero82748274/Example.swf

 

实现代码：

 

package
{
 import com.fileitup.fisixengine.constraints.SpringConstraint;
 import com.fileitup.fisixengine.core.FisixEngine;
 import com.fileitup.fisixengine.core.FisixObject;
 import com.fileitup.fisixengine.utils.BoundingBox;
 
 import flash.display.Bitmap;
 import flash.display.MovieClip;
 import flash.events.Event;
 import flash.text.TextField;
 
 /**In this example, a jello-type object is created and manipulated by the mouse
  */
 [SWF(width='700',height='500',backgroundColor='0x50464b',frameRate='30')]
 [Embed (source="1.jpg")]
 public class Example2  extends MovieClip{
  private var myEngine:FisixEngine
  private var txtFPS:TextField
  
  public function Example2 (){
   //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=true
   
   //set the gravity to pull down at a rate of 1 pixel per second
   myEngine.setGravity(0,1)
   
   //create a jello cube
   var jello:FisixObject = myEngine.newFisixObject();
   
   for(var i:uint=0;i<12;i++)
   jello.newCircleParticle(250+100*Math.cos(i*30),200+100*Math.sin(i*30),20);
    SpringConstraint.constraintAll(jello,jello.particles,.9);
 
   //attach the corner of the jello to the mouse
    myEngine.newMouseAttacher(jello.particles[0],root,3)

   //turn on primitive rendering
   myEngine.setRender(true);
   //tell the engine where to render to
   myEngine.setRenderGraphics(graphics)

   addEventListener(Event.ENTER_FRAME,onEnterFrame)
   
   txtFPS = new TextField()
    addChild(txtFPS)
  }
  
 
  private function onEnterFrame(e:Event):void{
   myEngine.mainLoop(1)

   txtFPS.text = int(myEngine.getRealFPS()).toString()
  }
 }
}