Monsters: improve targeting

* Replace DoWithNearestPlayer with bounding box search (avoid iterating through all players in world).
* Do line-of-sight checks from eye-to-eye.
+ Added LOS and LOS lost timer to target lost checks, in addition to distance.

src/Mobs/Enderman.cpp

@@ -113,14 +113,8 @@ void cEnderman::CheckEventSeePlayer(cChunk & a_Chunk)
 
 	ASSERT(Callback.GetPlayer() != nullptr);
 
-	if (!Callback.GetPlayer()->CanMobsTarget())
-	{
-		return;
-	}
-
-	// Target the player
-	cMonster::EventSeePlayer(Callback.GetPlayer(), a_Chunk);
-	m_EMState = CHASING;
+	// Target the player:
+	cAggressiveMonster::EventSeePlayer(Callback.GetPlayer(), a_Chunk);
 	m_bIsScreaming = true;
 	GetWorld()->BroadcastEntityMetadata(*this);
 }
@@ -129,16 +123,6 @@ void cEnderman::CheckEventSeePlayer(cChunk & a_Chunk)
 
 
 
-void cEnderman::CheckEventLostPlayer(void)
-{
-	Super::CheckEventLostPlayer();
-	EventLosePlayer();
-}
-
-
-
-
-
 void cEnderman::EventLosePlayer()
 {
 	Super::EventLosePlayer();