public PhysicsFight()
{
TestName = Regex.Replace(GetType().Name, @"(\B[A-Z])", " $1");
//新建一个物理世界，参数为gravity，为10，box2D中的计量单位为米
World = new World(new Vector2(0, -10));
World.SetContactListener(this);
World.DestructionListener = this;
World.Drawer = Drawer;
GroundBody = World.CreateBody(new BodyDef());
DumpLogger.Instance = new UnityLogger();
instance = this;
}
private void Start()
{
PhysicsFight = new PhysicsFight();
FixedUpdate.Start();
}