MyRecastNavmesh.h

/**
*
*/
class SHOOTERGAME_API dtQueryFilter_Example : public dtQueryFilter
{
public:
	dtQueryFilter_Example(bool inIsVirtual = true) : dtQueryFilter(inIsVirtual)
	{

	}

	virtual ~dtQueryFilter_Example() {}
protected:
	
	virtual float getVirtualCost(const float* pa, const float* pb,
		const dtPolyRef prevRef, const dtMeshTile* prevTile, const dtPoly* prevPoly,
		const dtPolyRef curRef, const dtMeshTile* curTile, const dtPoly* curPoly,
		const dtPolyRef nextRef, const dtMeshTile* nextTile, const dtPoly* nextPoly) const override;
	
private:
	float GetCustomCost(const FVector2D StartPosition, const FVector2D EndPosition) const;
};

/**
*
*/
class SHOOTERGAME_API FRecastQueryFilter_Example : public INavigationQueryFilterInterface, public dtQueryFilter_Example
{
public:
	FRecastQueryFilter_Example(bool bIsVirtual = true);
	virtual ~FRecastQueryFilter_Example() {}

	virtual void Reset() override;

	virtual void SetAreaCost(uint8 AreaType, float Cost) override;
	virtual void SetFixedAreaEnteringCost(uint8 AreaType, float Cost) override;
	virtual void SetExcludedArea(uint8 AreaType) override;
	virtual void SetAllAreaCosts(const float* CostArray, const int32 Count) override;
	virtual void GetAllAreaCosts(float* CostArray, float* FixedCostArray, const int32 Count) const override;
	virtual void SetBacktrackingEnabled(const bool bBacktracking) override;
	virtual bool IsBacktrackingEnabled() const override;
	virtual bool IsEqual(const INavigationQueryFilterInterface* Other) const override;
	virtual void SetIncludeFlags(uint16 Flags) override;
	virtual uint16 GetIncludeFlags() const override;
	virtual void SetExcludeFlags(uint16 Flags) override;
	virtual uint16 GetExcludeFlags() const override;
	virtual INavigationQueryFilterInterface* CreateCopy() const override;

	const dtQueryFilter* GetAsDetourQueryFilter() const { return this; }

	/** note that it results in losing all area cost setup. Call it before setting anything else */
	void SetIsVirtual(bool bIsVirtual);
};

/**
*
*/
UCLASS()
class SHOOTERGAME_API AMyRecastNavMesh : public ARecastNavMesh
{
	GENERATED_BODY()

public:
	AMyRecastNavMesh(const FObjectInitializer& ObjectInitializer);
	FRecastQueryFilter_Example* GetCustomFilter() const;

protected:
	virtual void Tick(float deltaTime) override;
	virtual void BeginPlay() override;

private:
	FRecastQueryFilter_Example DefaultNavFilter;
	void SetupCustomNavFilter();
};