1 files changed, 65 insertions, 0 deletions
diff --git a/src/MobProximityCounter.h b/src/MobProximityCounter.h
new file mode 100644
index 000000000..8a67139aa
--- /dev/null
+++ b/src/MobProximityCounter.h
@@ -0,0 +1,65 @@
+
+#pragma once
+
+#include <set>
+
+class cChunk;
+class cEntity;
+
+
+// This class is used to collect, for each Mob, what is the distance of the closest player
+// it was first being designed in order to make mobs spawn / despawn / act
+// as the behaviour and even life of mobs depends on the distance to closest player
+class cMobProximityCounter
+{
+protected :
+	// structs used for later maps (see m_MonsterToDistance and m_DistanceToMonster)
+	struct sDistanceAndChunk
+	{
+		sDistanceAndChunk(double a_Distance, cChunk& a_Chunk) : m_Distance(a_Distance), m_Chunk(a_Chunk) {}
+		double m_Distance;
+		cChunk& m_Chunk;
+	};
+	struct sMonsterAndChunk
+	{
+		sMonsterAndChunk(cEntity& a_Monster, cChunk& a_Chunk) : m_Monster(a_Monster), m_Chunk(a_Chunk) {}
+		cEntity& m_Monster;
+		cChunk& m_Chunk;
+	};
+
+public : 
+	typedef std::map<cEntity*,sDistanceAndChunk> tMonsterToDistance;
+	typedef std::multimap<double,sMonsterAndChunk> tDistanceToMonster;
+
+protected : 
+	// this map is filled during collection phase, it will be later transformed into DistanceToMonster
+	tMonsterToDistance m_MonsterToDistance;
+
+	// this map is generated after collection phase, in order to access monster by distance to player
+	tDistanceToMonster m_DistanceToMonster;
+
+	// this are the collected chunks. Used to determinate the number of elligible chunk for spawning.
+	std::set<cChunk*> m_EligibleForSpawnChunks;
+
+protected : 
+	// transform monsterToDistance map (that was usefull for collecting) into distanceToMonster
+	// that will be usefull for picking up.
+	void convertMaps();
+
+public :
+	// count a mob on a specified chunk with specified distance to an unkown player
+	// if the distance is shortest than the one collected, this become the new closest
+	// distance and the chunk become the "hosting" chunk (that is the one that will perform the action)
+	void CollectMob(cEntity& a_Monster, cChunk& a_Chunk, double a_Distance);
+
+	// return the mobs that are within the range of distance of the closest player they are
+	// that means that if a mob is 30 m from a player and 150 m from another one. It will be
+	// in the range [0..50] but not in [100..200]
+	struct sIterablePair{
+		tDistanceToMonster::const_iterator m_Begin;
+		tDistanceToMonster::const_iterator m_End;
+		int m_Count;
+	};
+	sIterablePair getMobWithinThosesDistances(double a_DistanceMin, double a_DistanceMax);
+
+};