[游戏开发]GetRandomReachablePointInRadius和GetRandomPointInNavigableRadius

蓝图节点

C++接口

	/** Generates a random location reachable from given Origin location.
	 *	@return Return Value represents if the call was successful */
	UFUNCTION(BlueprintPure, Category = "AI|Navigation", meta = (WorldContext = "WorldContextObject", DisplayName = "GetRandomReachablePointInRadius", ScriptName = "GetRandomReachablePointInRadius"))
	static bool K2_GetRandomReachablePointInRadius(UObject* WorldContextObject, const FVector& Origin, FVector& RandomLocation, float Radius, ANavigationData* NavData = NULL, TSubclassOf<UNavigationQueryFilter> FilterClass = NULL);

	/** Generates a random location in navigable space within given radius of Origin.
	 *	@return Return Value represents if the call was successful */
	UFUNCTION(BlueprintCallable, Category = "AI|Navigation", meta = (WorldContext = "WorldContextObject", DisplayName = "GetRandomLocationInNavigableRadius", ScriptName = "GetRandomLocationInNavigableRadius"))
	static bool K2_GetRandomLocationInNavigableRadius(UObject* WorldContextObject, const FVector& Origin, FVector& RandomLocation, float Radius, ANavigationData* NavData = NULL, TSubclassOf<UNavigationQueryFilter> FilterClass = NULL);

二者都是获取范围内一个随机位置，区别是

GetRandomReachablePointInRadius：一定可达。

GetRandomPointInNavigableRadius：不一定可达。例如在孤立平台上，随机到周围地面，实际上从当前位置到随机位置不可达。

参考

What's the difference between GetRandomReachablePointInRadius and GetRandomPointInNavigableRadius? In which case we should use which. - UE4 AnswerHub