first commit

Minecraft.World/PathFinder.h

@@ -0,0 +1,54 @@
+#pragma once
+#include "JavaIntHash.h"
+using namespace std;
+
+class LevelSource;
+
+class PathFinder
+{
+private:
+	LevelSource *level;
+
+    BinaryHeap openSet;
+
+	// 4J Jev, was a IntHashMap, thought this was close enough.
+    unordered_map<int, Node *, IntKeyHash, IntKeyEq> nodes;
+
+    NodeArray *neighbors;
+
+	bool canPassDoors;
+	bool canOpenDoors;
+	bool avoidWater;
+	bool canFloat;
+
+public:
+	PathFinder(LevelSource *level, bool canPassDoors, bool canOpenDoors, bool avoidWater, bool canFloat);
+	~PathFinder();
+
+    Path *findPath(Entity *from, Entity *to, float maxDist);
+    Path *findPath(Entity *from, int x, int y, int z, float maxDist);
+
+private:
+	Path *findPath(Entity *e, double xt, double yt, double zt, float maxDist);
+
+    // function A*(start,goal)
+    Path *findPath(Entity *e, Node *from, Node *to, Node *size, float maxDist);
+    int getNeighbors(Entity *entity, Node *pos, Node *size, Node *target, float maxDist);
+    Node *getNode(Entity *entity, int x, int y, int z, Node *size, int jumpSize);
+    /*final*/ Node *getNode(int x, int y, int z);
+
+public:
+	static const int TYPE_TRAP = -4;
+	static const int TYPE_FENCE = -3;
+	static const int TYPE_LAVA = -2;
+    static const int TYPE_WATER = -1;
+    static const int TYPE_BLOCKED = 0;
+    static const int TYPE_OPEN = 1;
+	static const int TYPE_WALKABLE = 2;
+
+	int isFree(Entity *entity, int x, int y, int z, Node *size);
+	static int isFree(Entity *entity, int x, int y, int z, Node *size, bool avoidWater, bool canOpenDoors, bool canPassDoors);
+
+    // function reconstruct_path(came_from,current_node)
+    Path *reconstruct_path(Node *from, Node *to);
+};