SpawnActor的Owner和Instigator参数

/* Struct of optional parameters passed to SpawnActor function(s). */
struct ENGINE_API FActorSpawnParameters
{

	/* The Actor that spawned this Actor. (Can be left as NULL). */
	AActor* Owner;

	/* The APawn that is responsible for damage done by the spawned Actor. (Can be left as NULL). */
	APawn*	Instigator;
};

SpawnActor传参，Owner和Instigator含义一开始不明白，后来查了下，这么理解可能更容易。
举个例子：玩家在坦克中开炮，命中了敌人。这里炮弹的Owner是坦克，Instigator是玩家。