70 lines
2.9 KiB
Ucode
70 lines
2.9 KiB
Ucode
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/**
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* Given a list of actors we're interested in, will find the closest one to us (closest path distance)
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* accomplished by seeding the working set with start nodes for all the actors
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*
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* Usage:
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* needs to go last in the GoalList as this does DetermineFinalGoal
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* need to pass in a out_DestActor to the call to FindPath() as that will have the specific actor
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* (the returned GoalPoint is is the center of the poly (which could have N goals on it)
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*
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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class NavMeshGoal_ClosestActorInList extends NavMeshPathGoalEvaluator
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native(AI);
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cpptext
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{
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// ++ NavMeshPathGoalEvaluator Interface ++
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// overidden to add the polys all our goal points are in to the working set instead of just the anchor
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virtual UBOOL SeedWorkingSet( PathOpenList& OpenList, FNavMeshPolyBase* AnchorPoly, DWORD PathSessionID,UNavigationHandle* Handle, const FNavMeshPathParams& PathParams );
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virtual UBOOL InitializeSearch( UNavigationHandle* Handle, const FNavMeshPathParams& PathParams );
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// stop when we reach the anchor
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virtual UBOOL EvaluateGoal( PathCardinalType PossibleGoal, const FNavMeshPathParams& PathParams, PathCardinalType& out_GenGoal );;
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// determine which goal actor we pathed to first (which was closest)
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virtual UBOOL DetermineFinalGoal( PathCardinalType& out_GenGoal, class AActor** out_DestActor, INT* out_DestItem );
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// overidden to save the path in forward order since we're pathing backwards
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/**
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* walks the previousPath chain back and saves out edges into the handle's pathcache for that handle to follow
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* @param StartingPoly - the Polygon we are walking backwards toward
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* @param GoalPoly - the polygon to begin walking backwards from
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* @param Handle - the handle to save the path out to
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* @param GoalEdge - the edge that lead us to the goal poly
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*/
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virtual void SaveResultingPath( FNavMeshPolyBase* StartingPoly, FNavMeshPolyBase* GoalPoly, UNavigationHandle* Handle, FNavMeshEdgeBase* GoalEdge );
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}
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var array<BiasedGoalActor> GoalList;
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/** cached map of which polys match to which actors */
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var const private native transient MultiMap_Mirror PolyToGoalActorMap{TMultiMap<FNavMeshPolyBase*,AActor*>};
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/** Cached ref to the anchor poly we're trying to path back to */
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var native pointer CachedAnchorPoly{FNavMeshPolyBase};
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static function NavMeshGoal_ClosestActorInList ClosestActorInList(NavigationHandle NavHandle, const out array<BiasedGoalActor> InGoalList)
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{
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local NavMeshGoal_ClosestActorInList Eval;
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Eval = NavMeshGoal_ClosestActorInList(NavHandle.CreatePathGoalEvaluator(default.class));
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Eval.GoalList = InGoalList;
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NavHandle.AddGoalEvaluator(Eval);
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return Eval;
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}
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event Recycle()
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{
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Super.Recycle();
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GoalList.length = 0;
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RecycleInternal();
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}
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native function RecycleInternal();
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defaultproperties
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{
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MaxPathVisits=3000
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}
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