平移关节(Prismatic Joint)

 1 package{
 2     import Box2D.Common.Math.b2Vec2;
 3     import Box2D.Dynamics.b2Body;
 4     import Box2D.Dynamics.Joints.b2PrismaticJointDef;
 5 
 6     /**
 7     * 
 8     */
 9     public class Main extends BaseMain{
10         
11         
12         public function Main(){
13             super(new b2Vec2(0,10));
14         }
15         
16         override protected function init():void{
17             var bodyA:b2Body=this.createBox(50,50,100,400);
18             var bodyB:b2Body=this.createCircle(25,700,400);
19             
20             
21             var jointDef:b2PrismaticJointDef=new b2PrismaticJointDef();
22             
23             var anchor:b2Vec2=bodyA.GetWorldCenter();
24             var axis:b2Vec2=new b2Vec2(1,0);
25             jointDef.Initialize(bodyA,bodyB,anchor,axis);
26             _world.CreateJoint(jointDef);
27             
28             bodyA.SetFixedRotation(true);
29         }
30         
31         
32     };
33 }