diff options
Diffstat (limited to 'src/Mobs/Path.h')
| -rw-r--r-- | src/Mobs/Path.h | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/src/Mobs/Path.h b/src/Mobs/Path.h index 9e893f1d7..7a4182f17 100644 --- a/src/Mobs/Path.h +++ b/src/Mobs/Path.h @@ -1,3 +1,4 @@ + #pragma once /* Wanna use the pathfinder? Put this in your header file: @@ -11,7 +12,7 @@ Put this in your .cpp: */ #ifdef COMPILING_PATHFIND_DEBUGGER - /* Note: the COMPILING_PATHFIND_DEBUGGER flag is used by Native/WiseOldMan95 to debug + /* Note: the COMPILING_PATHFIND_DEBUGGER flag is used by Native / WiseOldMan95 to debug this class outside of MCServer. This preprocessor flag is never set when compiling MCServer. */ #include "PathFinderIrrlicht_Head.h" #endif @@ -22,7 +23,7 @@ Put this in your .cpp: class cChunk; /* Various little structs and classes */ -enum class ePathFinderStatus {CALCULATING, PATH_FOUND, PATH_NOT_FOUND}; +enum class ePathFinderStatus {CALCULATING, PATH_FOUND, PATH_NOT_FOUND, NEARBY_FOUND}; struct cPathCell; // Defined inside Path.cpp class compareHeuristics { @@ -61,9 +62,17 @@ public: /** Destroys the path and frees its memory. */ ~cPath(); - /** Performs part of the path calculation and returns true if the path computation has finished. */ + /** Performs part of the path calculation and returns the appropriate status. + If NEARBY_FOUND is returned, it means that the destination is not reachable, but a nearby destination + is reachable. If the user likes the alternative destination, they can call AcceptNearbyPath to treat the path as found, + and to make consequent calls to step return PATH_FOUND*/ ePathFinderStatus Step(cChunk & a_Chunk); + /** Called after the PathFinder's step returns NEARBY_FOUND. + Changes the PathFinder status from NEARBY_FOUND to PATH_FOUND, returns the nearby destination that + the PathFinder found a path to. */ + Vector3i AcceptNearbyPath(); + /* Point retrieval functions, inlined for performance. */ /** Returns the next point in the path. */ inline Vector3i GetNextPoint() @@ -92,7 +101,10 @@ public: /** Returns the total number of points this path has. */ inline int GetPointCount() { - ASSERT(m_Status == ePathFinderStatus::PATH_FOUND); + if (m_Status != ePathFinderStatus::PATH_FOUND) + { + return 0; + } return m_PathPoints.size(); } @@ -118,6 +130,8 @@ private: bool Step_Internal(); // The public version just calls this version * CALCULATIONS_PER_CALL times. void FinishCalculation(); // Clears the memory used for calculating the path. void FinishCalculation(ePathFinderStatus a_NewStatus); // Clears the memory used for calculating the path and changes the status. + void AttemptToFindAlternative(); + void BuildPath(); /* Openlist and closedlist management */ void OpenListAdd(cPathCell * a_Cell); @@ -130,10 +144,11 @@ private: /* Pathfinding fields */ std::priority_queue<cPathCell *, std::vector<cPathCell *>, compareHeuristics> m_OpenList; - std::unordered_map<Vector3i, cPathCell *, VectorHasher> m_Map; + std::unordered_map<Vector3i, UniquePtr<cPathCell>, VectorHasher> m_Map; Vector3i m_Destination; Vector3i m_Source; int m_StepsLeft; + cPathCell * m_NearestPointToTarget; /* Control fields */ ePathFinderStatus m_Status; @@ -144,6 +159,7 @@ private: /* Interfacing with the world */ cChunk * m_Chunk; // Only valid inside Step()! + bool m_BadChunkFound; #ifdef COMPILING_PATHFIND_DEBUGGER #include "../path_irrlicht.cpp" #endif |