Merge pull request #1047 from mc-server/Enderman

Enderman attacks a player if he's looking at him

src/Mobs/Enderman.cpp

@@ -2,6 +2,74 @@
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "Enderman.h"
+#include "../Entities/Player.h"
+#include "../Tracer.h"
+
+
+
+
+///////////////////////////////////////////////////////////////////////////
+// cPlayerLookCheck
+class cPlayerLookCheck :
+	public cPlayerListCallback
+{
+public:
+	cPlayerLookCheck(Vector3d a_EndermanPos) :
+		m_Player(NULL),
+		m_EndermanPos(a_EndermanPos)
+	{
+	}
+
+	virtual bool Item(cPlayer * a_Player) override
+	{
+		// Don't check players who are in creative gamemode
+		if (a_Player->IsGameModeCreative())
+		{
+			return false;
+		}
+		
+		Vector3d Direction = m_EndermanPos - a_Player->GetPosition();
+		
+		// Don't check players who are more then 64 blocks away
+		if (Direction.SqrLength() > 64)
+		{
+			return false;
+		}
+		
+		// Don't check if the player has a pumpkin on his head
+		if (a_Player->GetEquippedHelmet().m_ItemType == E_BLOCK_PUMPKIN)
+		{
+			return false;
+		}
+
+		
+		Vector3d LookVector = a_Player->GetLookVector();
+		double dot = Direction.Dot(LookVector);
+		
+		// 0.09 rad ~ 5 degrees
+		// If the player's crosshair is within 5 degrees of the enderman, it counts as looking
+		if (dot > cos(0.09))
+		{
+			return false;
+		}
+		
+		cTracer LineOfSight(a_Player->GetWorld());
+		if (LineOfSight.Trace(m_EndermanPos, Direction, (int)Direction.Length()))
+		{
+			// No direct line of sight
+			return false;
+		}
+
+		m_Player = a_Player;
+		return true;
+	}
+	
+	cPlayer * GetPlayer(void) const { return m_Player; }
+
+protected:
+	cPlayer * m_Player;
+	Vector3d m_EndermanPos;
+} ;
 
 
 
@@ -32,3 +100,54 @@ void cEnderman::GetDrops(cItems & a_Drops, cEntity * a_Killer)
 
 
 
+void cEnderman::CheckEventSeePlayer()
+{	
+	if (m_Target != NULL)
+	{
+		return;
+	}
+
+	cPlayerLookCheck Callback(GetPosition());
+	if (m_World->ForEachPlayer(Callback))
+	{
+		return;
+	}
+	
+	ASSERT(Callback.GetPlayer() != NULL);
+
+	int ChunkX, ChunkZ;
+	cChunkDef::BlockToChunk(POSX_TOINT, POSZ_TOINT, ChunkX, ChunkZ);
+
+	 // Check if the chunk the enderman is in is lit
+	if (!m_World->IsChunkLighted(ChunkX, ChunkZ))
+	{
+		m_World->QueueLightChunk(ChunkX, ChunkZ);
+		return;
+	}
+
+	// Enderman only attack if the skylight is higher than 7 
+	if (m_World->GetBlockSkyLight(POSX_TOINT, POSY_TOINT, POSZ_TOINT) <= 7)
+	{
+		// TODO: Teleport the enderman to a random spot
+		return;
+	}
+
+	if (!Callback.GetPlayer()->IsGameModeCreative())
+	{
+		super::EventSeePlayer(Callback.GetPlayer());
+		m_EMState = CHASING;
+		m_bIsScreaming = true;
+		GetWorld()->BroadcastEntityMetadata(*this);
+	}
+}
+	
+
+
+
+
+void cEnderman::EventLosePlayer()
+{
+	super::EventLosePlayer();
+	m_bIsScreaming = false;
+	GetWorld()->BroadcastEntityMetadata(*this);
+}

src/Mobs/Enderman.h

@@ -18,6 +18,8 @@ public:
 	CLASS_PROTODEF(cEnderman)
 
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL) override;
+	virtual void CheckEventSeePlayer(void) override;
+	virtual void EventLosePlayer(void) override;
 
 	bool IsScreaming(void) const {return m_bIsScreaming; }
 	BLOCKTYPE GetCarriedBlock(void) const {return CarriedBlock; }