线关节(Line Joint)

package{
    import Box2D.Common.Math.b2Vec2;
    import Box2D.Dynamics.b2Body;
    import Box2D.Dynamics.Joints.b2LineJointDef;
    import Box2D.Dynamics.Joints.b2PrismaticJointDef;

    /**
    * 线关节，限制一个刚体只能在一个轴向上移动
    */
    public class Main extends BaseMain{
        
        
        public function Main(){
            super(new b2Vec2(0,10));
        }
        
        override protected function init():void{
            var bodyA:b2Body=this.createBox(50,50,400,300);
            var bodyB:b2Body=this.createCircle(25,400,300);
            bodyA.SetType(b2Body.b2_staticBody);
            
            var jointDef:b2LineJointDef=new b2LineJointDef();
            var anchor:b2Vec2=bodyA.GetWorldCenter();
            var axis:b2Vec2=new b2Vec2(1,0);
            jointDef.Initialize(bodyA,bodyB,anchor,axis);
            _world.CreateJoint(jointDef);
            
        }
        
        
    };
}

源码下载：http://yunpan.cn/c37xzDJTk4ekb  访问密码 c8c5