129 lines
5.5 KiB
Ucode
129 lines
5.5 KiB
Ucode
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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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* Used to define certain gameplay areas, and has optional support for interacting with the NavMesh
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* (To block some types of enemies from pathing through it).
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*/
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class EnvironmentVolume extends Volume
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native(AI)
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implements(Interface_NavMeshPathObstacle)
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implements(Interface_NavMeshPathObject)
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placeable;
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/** Keep track is NavMesh is split by this volume to affect AI pathing.
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* Change this through SetSplitNavMesh() */
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var const transient bool bSplitNavMesh;
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cpptext
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{
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virtual UBOOL ShouldAIAvoidMe(AAIController* AIC);
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virtual void BeginDestroy()
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{
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Super::BeginDestroy();
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// Unsplit if it was split.
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if( bSplitNavMesh )
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{
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SetSplitNavMesh(FALSE);
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}
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}
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//////////////////////////////////////////////////////////////////////////
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// Interface_NavMeshPathObject
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/**
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* Called from edges linked to this PO
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* @param Interface - the navhandle interface of the entity pathing
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* @param PreviousPoint - the previous point in the path search (e.g. the point along the predecessor edge)
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* @param out_PathEdgePoint - the point we used along this edge to determine the cost
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* @param Edge - the edge linked to this PO which needs to compute cost
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* @return - the cost for traversing this edge
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*/
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virtual INT CostFor( const FNavMeshPathParams& PathParams, const FVector& PreviousPoint, FVector& out_PathEdgePoint, FNavMeshPathObjectEdge* Edge, FNavMeshPolyBase* SourcePoly );
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/**
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* called to allow this PO to draw custom stuff for edges linked to it
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* @param DRSP - the sceneproxy we're drawing for
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* @param DrawOffset - offset from the actual location we should be drawing
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* @param Edge - the edge we're drawing
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* @return - whether this PO is doing custom drawing for the passed edge (FALSE indicates the default edge drawing functionality should be used)
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*/
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virtual UBOOL DrawEdge( FDebugRenderSceneProxy* DRSP, FColor C, FVector DrawOffset, FNavMeshPathObjectEdge* Edge );
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// END path object interface
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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// Interface_NavMeshPathObstacle
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/**
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* this function should populate out_polyshape with a list of verts which describe this object's
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* convex bounding shape
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* @param out_PolyShape - output array which holds the vertex buffer for this obstacle's bounding polyshape
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* @return TRUE if this object should block things right now (FALSE means this obstacle shouldn't affect the mesh)
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*/
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virtual UBOOL GetBoundingShape(TArray<FVector>& out_PolyShape,INT ShapeIdx);
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/**
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* when TRUE polys internal to this obstacle will be preserved, but still split. (useful for things like cost volumes that
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* need to adjust cost but not completely destroy parts of the mesh
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* @return TRUE if polys should be preserved internal to this obstacle
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*/
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virtual UBOOL PreserveInternalPolys() { return TRUE; }
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/**
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* This function is called when an edge is going to be added connecting a polygon internal to this obstacle to another polygon which is not
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* Default behavior just a normal edge, override to add special costs or behavior (e.g. link a pathobject to the obstacle)
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* @param Status - current status of edges (e.g. what still needs adding)
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* @param inV1 - vertex location of first vert in the edge
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* @param inV2 - vertex location of second vert in the edge
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* @param ConnectedPolys - the polys this edge links
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* @param bEdgesNeedToBeDynamic - whether or not added edges need to be dynamic (e.g. we're adding edges between meshes)
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* @param PolyAssocatedWithThisPO - the index into the connected polys array parmaeter which tells us which poly from that array is associated with this path object
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* @(optional) param SupportedEdgeWidth - width of unit that this edge supports, defaults to -1.0f meaning the length of the edge itself will be used
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* @(optional) param EdgeGroupID - ID of the edgegroup this edge is a part of (defaults to no group)
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* @return returns an enum describing what just happened (what actions did we take) - used to determien what accompanying actions need to be taken
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* by other obstacles and calling code
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*/
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virtual EEdgeHandlingStatus AddObstacleEdge( EEdgeHandlingStatus Status, const FVector& inV1, const FVector& inV2, TArray<FNavMeshPolyBase*>& ConnectedPolys, UBOOL bEdgesNeedToBeDynamic, INT PolyAssocatedWithThisPO, FLOAT SupportedEdgeWidth=-1.0f, BYTE EdgeGroupID=MAXBYTE);
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/**
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* For debugging. Verifies that this pathobject is still alive and well and not orphaned or deleted
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* @return - TRUE If this path object is in good working order
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*/
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virtual UBOOL Verify()
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{
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return !IsPendingKill();
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}
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virtual UBOOL VerifyObstacle()
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{
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return Verify();
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}
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// END Interface_NavMeshPathObstacle
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//////////////////////////////////////////////////////////////////////////
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/**
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* Removes the volume from world info's list of environment volumes.
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*/
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virtual void ClearComponents( void );
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protected:
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/**
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* Adds the volume to world info's list of environment volumes.
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*/
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virtual void UpdateComponentsInternal( UBOOL bCollisionUpdate = FALSE );
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public:
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}
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/** Should this volume register and split the NavMesh to affect AI pathing? */
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final native function SetSplitNavMesh(bool bNewValue);
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defaultproperties
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{
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bSplitNavMesh=FALSE // That should not be changed, only through SetSplitNavMesh().
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}
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