Box2D中ApplyForce( )和ApplyImpulse( ) 以及SetLinear...
先看API文档ApplyForce()methodpublicfunctionApplyForce(force:b2Vec2,point:b2Vec2):voidApplyaforceataworldpoint.Iftheforceisnotappliedatthecenterofmass,itwillgenerateatorqueandaffecttheangularvelocity.Thisw