15 files changed, 192 insertions, 188 deletions

diff --git a/src/Entities/ArrowEntity.cpp b/src/Entities/ArrowEntity.cpp
index 7e429c62e..30f18f677 100644
--- a/src/Entities/ArrowEntity.cpp
+++ b/src/Entities/ArrowEntity.cpp
@@ -217,7 +217,7 @@ void cArrowEntity::Tick(float a_Dt, cChunk & a_Chunk)
 		int RelPosZ = m_HitBlockPos.z - a_Chunk.GetPosZ() * cChunkDef::Width;
 		cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
 		
-		if (Chunk == NULL)
+		if (Chunk == nullptr)
 		{
 			// Inside an unloaded chunk, abort
 			return;
diff --git a/src/Entities/Boat.cpp b/src/Entities/Boat.cpp
index 328a70846..953213bca 100644
--- a/src/Entities/Boat.cpp
+++ b/src/Entities/Boat.cpp
@@ -42,7 +42,7 @@ bool cBoat::DoTakeDamage(TakeDamageInfo & TDI)
 
 	if (GetHealth() == 0)
 	{
-		if (TDI.Attacker != NULL)
+		if (TDI.Attacker != nullptr)
 		{
 			if (TDI.Attacker->IsPlayer())
 			{
@@ -64,7 +64,7 @@ void cBoat::OnRightClicked(cPlayer & a_Player)
 {
 	super::OnRightClicked(a_Player);
 
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 		{
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index da85dec50..afc61c73f 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -29,8 +29,8 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 	: m_UniqueID(0)
 	, m_Health(1)
 	, m_MaxHealth(1)
-	, m_AttachedTo(NULL)
-	, m_Attachee(NULL)
+	, m_AttachedTo(nullptr)
+	, m_Attachee(nullptr)
 	, m_bDirtyHead(true)
 	, m_bDirtyOrientation(true)
 	, m_bHasSentNoSpeed(true)
@@ -38,9 +38,9 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 	, m_Gravity(-9.81f)
 	, m_LastPos(a_X, a_Y, a_Z)
 	, m_IsInitialized(false)
-	, m_WorldTravellingFrom(NULL)
+	, m_WorldTravellingFrom(nullptr)
 	, m_EntityType(a_EntityType)
-	, m_World(NULL)
+	, m_World(nullptr)
 	, m_IsFireproof(false)
 	, m_TicksSinceLastBurnDamage(0)
 	, m_TicksSinceLastLavaDamage(0)
@@ -73,7 +73,7 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, d
 cEntity::~cEntity()
 {
 	// Before deleting, the entity needs to have been removed from the world, if ever added
-	ASSERT((m_World == NULL) || !m_World->HasEntity(m_UniqueID));
+	ASSERT((m_World == nullptr) || !m_World->HasEntity(m_UniqueID));
 	
 	/*
 	// DEBUG:
@@ -85,11 +85,11 @@ cEntity::~cEntity()
 		);
 	*/
 	
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		Detach();
 	}
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		m_Attachee->Detach();
 	}
@@ -242,7 +242,7 @@ void cEntity::TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_R
 	TDI.FinalDamage = a_FinalDamage;
 	
 	Vector3d Heading(0, 0, 0);
-	if (a_Attacker != NULL)
+	if (a_Attacker != nullptr)
 	{
 		Heading = a_Attacker->GetLookVector() * (a_Attacker->IsSprinting() ? 16 : 11);
 		Heading.y = 1.6;
@@ -265,7 +265,7 @@ void cEntity::SetYawFromSpeed(void)
 		SetYaw(0);
 		return;
 	}
-	SetYaw(atan2(m_Speed.x, m_Speed.z) * 180 / PI);
+	SetYaw(atan2(m_Speed.x, m_Speed.z) * 180 / M_PI);
 }
 
 
@@ -282,7 +282,7 @@ void cEntity::SetPitchFromSpeed(void)
 		SetPitch(0);
 		return;
 	}
-	SetPitch(atan2(m_Speed.y, xz) * 180 / PI);
+	SetPitch(atan2(m_Speed.y, xz) * 180 / M_PI);
 }
 
 
@@ -308,7 +308,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 		return false;
 	}
 
-	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	if ((a_TDI.Attacker != nullptr) && (a_TDI.Attacker->IsPlayer()))
 	{
 		cPlayer * Player = (cPlayer *)a_TDI.Attacker;
 
@@ -544,7 +544,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 	m_Health = std::max(m_Health, 0);
 
 	// Add knockback:
-	if ((IsMob() || IsPlayer()) && (a_TDI.Attacker != NULL))
+	if ((IsMob() || IsPlayer()) && (a_TDI.Attacker != nullptr))
 	{
 		int KnockbackLevel = a_TDI.Attacker->GetEquippedWeapon().m_Enchantments.GetLevel(cEnchantments::enchKnockback);  // More common enchantment
 		if (KnockbackLevel < 1)
@@ -571,7 +571,7 @@ bool cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 	{
 		KilledBy(a_TDI);
 
-		if (a_TDI.Attacker != NULL)
+		if (a_TDI.Attacker != nullptr)
 		{
 			a_TDI.Attacker->Killed(this);
 		}
@@ -778,7 +778,7 @@ void cEntity::Tick(float a_Dt, cChunk & a_Chunk)
 		m_InvulnerableTicks--;
 	}
 
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		Vector3d DeltaPos = m_Pos - m_AttachedTo->GetPosition();
 		if (DeltaPos.Length() > 0.5)
@@ -1092,7 +1092,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtOnFire, NULL, BURN_DAMAGE, 0);
+				TakeDamage(dtOnFire, nullptr, BURN_DAMAGE, 0);
 			}
 			m_TicksSinceLastBurnDamage = 0;
 		}
@@ -1163,7 +1163,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtLavaContact, NULL, LAVA_DAMAGE, 0);
+				TakeDamage(dtLavaContact, nullptr, LAVA_DAMAGE, 0);
 			}
 			m_TicksSinceLastLavaDamage = 0;
 		}
@@ -1184,7 +1184,7 @@ void cEntity::TickBurning(cChunk & a_Chunk)
 		{
 			if (!m_IsFireproof)
 			{
-				TakeDamage(dtFireContact, NULL, FIRE_DAMAGE, 0);
+				TakeDamage(dtFireContact, nullptr, FIRE_DAMAGE, 0);
 			}
 			m_TicksSinceLastFireDamage = 0;
 		}
@@ -1213,7 +1213,7 @@ void cEntity::TickInVoid(cChunk & a_Chunk)
 {
 	if (m_TicksSinceLastVoidDamage == 20)
 	{
-		TakeDamage(dtInVoid, NULL, 2, 0);
+		TakeDamage(dtInVoid, nullptr, 2, 0);
 		m_TicksSinceLastVoidDamage = 0;
 	}
 	else
@@ -1239,7 +1239,7 @@ void cEntity::DetectCacti(void)
 		(((GetPosY() - Y < 1) && (GetWorld()->GetBlock(X, Y, Z) == E_BLOCK_CACTUS))))
 		)
 	{
-		TakeDamage(dtCactusContact, NULL, 1, 0);
+		TakeDamage(dtCactusContact, nullptr, 1, 0);
 	}
 }
 
@@ -1380,7 +1380,7 @@ bool cEntity::DetectPortal()
 bool cEntity::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 {
 	UNUSED(a_ShouldSendRespawn);
-	ASSERT(a_World != NULL);
+	ASSERT(a_World != nullptr);
 
 	if (GetWorld() == a_World)
 	{
@@ -1406,7 +1406,7 @@ bool cEntity::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 bool cEntity::MoveToWorld(const AString & a_WorldName, bool a_ShouldSendRespawn)
 {
 	cWorld * World = cRoot::Get()->GetWorld(a_WorldName);
-	if (World == NULL)
+	if (World == nullptr)
 	{
 		LOG("%s: Couldn't find world \"%s\".", __FUNCTION__, a_WorldName.c_str());
 		return false;
@@ -1493,7 +1493,7 @@ void cEntity::HandleAir(void)
 			if (m_AirTickTimer <= 0)
 			{
 				// Damage player
-				TakeDamage(dtDrowning, NULL, 1, 1, 0);
+				TakeDamage(dtDrowning, nullptr, 1, 1, 0);
 				// Reset timer
 				m_AirTickTimer = DROWNING_TICKS;
 			}
@@ -1708,7 +1708,7 @@ void cEntity::AttachTo(cEntity * a_AttachTo)
 		// Already attached to that entity, nothing to do here
 		return;
 	}
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		// Detach from any previous entity:
 		Detach();
@@ -1726,14 +1726,14 @@ void cEntity::AttachTo(cEntity * a_AttachTo)
 
 void cEntity::Detach(void)
 {
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		// Attached to no entity, our work is done
 		return;
 	}
-	m_AttachedTo->m_Attachee = NULL;
-	m_AttachedTo = NULL;
-	m_World->BroadcastAttachEntity(*this, NULL);
+	m_AttachedTo->m_Attachee = nullptr;
+	m_AttachedTo = nullptr;
+	m_World->BroadcastAttachEntity(*this, nullptr);
 }
 
 
@@ -1956,7 +1956,7 @@ void cEntity::HandleSpeedFromAttachee(float a_Forward, float a_Sideways)
 
 void cEntity::SteerVehicle(float a_Forward, float a_Sideways)
 {
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		return;
 	}
diff --git a/src/Entities/Entity.h b/src/Entities/Entity.h
index 451ac3711..af545fe4a 100644
--- a/src/Entities/Entity.h
+++ b/src/Entities/Entity.h
@@ -32,7 +32,7 @@
 #define POSZ_TOINT FloorC(GetPosZ())
 #define POS_TOINT  Vector3i(POSXTOINT, POSYTOINT, POSZTOINT)
 
-#define GET_AND_VERIFY_CURRENT_CHUNK(ChunkVarName, X, Z) cChunk * ChunkVarName = a_Chunk.GetNeighborChunk(X, Z); if ((ChunkVarName == NULL) || !ChunkVarName->IsValid()) { return; }
+#define GET_AND_VERIFY_CURRENT_CHUNK(ChunkVarName, X, Z) cChunk * ChunkVarName = a_Chunk.GetNeighborChunk(X, Z); if ((ChunkVarName == nullptr) || !ChunkVarName->IsValid()) { return; }
 
 
 
@@ -84,13 +84,13 @@ public:
 		etFloater,
 		etItemFrame,
 		etPainting,
-
+		
 		// Common variations
 		etMob = etMonster,  // DEPRECATED, use etMonster instead!
 	} ;
-
+	
 	// tolua_end
-
+	
 	enum eEntityStatus
 	{
 		// TODO: Investiagate 0, 1, and 5 as Wiki.vg is not certain
@@ -127,22 +127,22 @@ public:
 		// Informs client to explode a firework based on its metadata
 		esFireworkExploding      = 17,
 	} ;
-
+	
 	static const int FIRE_TICKS_PER_DAMAGE = 10;   ///< Ticks to wait between damaging an entity when it stands in fire
 	static const int FIRE_DAMAGE           = 1;    ///< Damage to deal when standing in fire
 	static const int LAVA_TICKS_PER_DAMAGE = 10;   ///< Ticks to wait between damaging an entity when it stands in lava
 	static const int LAVA_DAMAGE           = 5;    ///< Damage to deal when standing in lava
 	static const int BURN_TICKS_PER_DAMAGE = 20;   ///< Ticks to wait between damaging an entity when it is burning
 	static const int BURN_DAMAGE           = 1;    ///< Damage to deal when the entity is burning
-
+	
 	static const int BURN_TICKS            = 200;  ///< Ticks to keep an entity burning after it has stood in lava / fire
-
+	
 	static const int MAX_AIR_LEVEL         = 300;  ///< Maximum air an entity can have
 	static const int DROWNING_TICKS        = 20;   ///< Number of ticks per heart of damage
-
+	
 	static const int VOID_BOUNDARY         = -46;  ///< Y position to begin applying void damage
 	static const int FALL_DAMAGE_HEIGHT    = 4;    ///< Y difference after which fall damage is applied
-
+	
 	cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
 	virtual ~cEntity();
 
@@ -151,9 +151,9 @@ public:
 	virtual bool Initialize(cWorld & a_World);
 
 	// tolua_begin
-
+	
 	eEntityType GetEntityType(void) const { return m_EntityType; }
-
+	
 	bool IsEnderCrystal(void) const { return (m_EntityType == etEnderCrystal); }
 	bool IsPlayer      (void) const { return (m_EntityType == etPlayer);       }
 	bool IsPickup      (void) const { return (m_EntityType == etPickup);       }
@@ -168,16 +168,16 @@ public:
 	bool IsFloater     (void) const { return (m_EntityType == etFloater);      }
 	bool IsItemFrame   (void) const { return (m_EntityType == etItemFrame);    }
 	bool IsPainting    (void) const { return (m_EntityType == etPainting);     }
-
+	
 	/// Returns true if the entity is of the specified class or a subclass (cPawn's IsA("cEntity") returns true)
 	virtual bool IsA(const char * a_ClassName) const;
-
+	
 	/** Returns the class name of this class */
 	static const char * GetClassStatic(void);
 	
 	/** Returns the topmost class name for the object */
 	virtual const char * GetClass(void) const;
-
+	
 	/** Returns the topmost class's parent class name for the object. cEntity returns an empty string (no parent). */
 	virtual const char * GetParentClass(void) const;
 
@@ -200,9 +200,9 @@ public:
 	double           GetSpeedY    (void) const { return m_Speed.y; }
 	double           GetSpeedZ    (void) const { return m_Speed.z; }
 	double           GetWidth     (void) const { return m_Width;   }
-
-	int GetChunkX(void) const {return static_cast<int>(floor(m_Pos.x / cChunkDef::Width)); }
-	int GetChunkZ(void) const {return static_cast<int>(floor(m_Pos.z / cChunkDef::Width)); }
+	
+	int GetChunkX(void) const {return (int)floor(m_Pos.x / cChunkDef::Width); }
+	int GetChunkZ(void) const {return (int)floor(m_Pos.z / cChunkDef::Width); }
 
 	void SetHeadYaw (double a_HeadYaw);
 	void SetHeight  (double a_Height);
@@ -219,21 +219,21 @@ public:
 
 	/** Sets the speed of the entity, measured in m / sec */
 	void SetSpeed(double a_SpeedX, double a_SpeedY, double a_SpeedZ);
-
+	
 	/** Sets the speed of the entity, measured in m / sec */
 	void SetSpeed(const Vector3d & a_Speed) { SetSpeed(a_Speed.x, a_Speed.y, a_Speed.z); }
-
+	
 	/** Sets the speed in the X axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedX(double a_SpeedX);
-
+	
 	/** Sets the speed in the Y axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedY(double a_SpeedY);
-
+	
 	/** Sets the speed in the Z axis, leaving the other speed components intact. Measured in m / sec. */
 	void SetSpeedZ(double a_SpeedZ);
-
+	
 	void SetWidth   (double a_Width);
-
+	
 	void AddPosX    (double a_AddPosX);
 	void AddPosY    (double a_AddPosY);
 	void AddPosZ    (double a_AddPosZ);
@@ -244,7 +244,7 @@ public:
 	void AddSpeedX  (double a_AddSpeedX);
 	void AddSpeedY  (double a_AddSpeedY);
 	void AddSpeedZ  (double a_AddSpeedZ);
-
+	
 	virtual void HandleSpeedFromAttachee(float a_Forward, float a_Sideways);
 	void SteerVehicle(float a_Forward, float a_Sideways);
 
@@ -256,60 +256,60 @@ public:
 
 	/// Makes this pawn take damage from an attack by a_Attacker. Damage values are calculated automatically and DoTakeDamage() called
 	void TakeDamage(cEntity & a_Attacker);
-
+	
 	/// Makes this entity take the specified damage. The final damage is calculated using current armor, then DoTakeDamage() called
 	void TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_RawDamage, double a_KnockbackAmount);
 
 	/// Makes this entity take the specified damage. The values are packed into a TDI, knockback calculated, then sent through DoTakeDamage()
 	void TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_RawDamage, int a_FinalDamage, double a_KnockbackAmount);
-
+	
 	float GetGravity(void) const { return m_Gravity; }
-
+	
 	void SetGravity(float a_Gravity) { m_Gravity = a_Gravity; }
-
+	
 	/// Sets the rotation to match the speed vector (entity goes "face-forward")
 	void SetYawFromSpeed(void);
-
+	
 	/// Sets the pitch to match the speed vector (entity gies "face-forward")
 	void SetPitchFromSpeed(void);
-
+	
 	// tolua_end
-
+	
 	/** Makes this entity take damage specified in the a_TDI.
 	The TDI is sent through plugins first, then applied.
 	If it returns false, the entity hasn't receive any damage. */
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI);
-
+	
 	// tolua_begin
 
 	/// Returns the hitpoints that this pawn can deal to a_Receiver using its equipped items
 	virtual int GetRawDamageAgainst(const cEntity & a_Receiver);
-
+	
 	/** Returns whether armor will protect against the passed damage type **/
 	virtual bool ArmorCoversAgainst(eDamageType a_DamageType);
-
+	
 	/// Returns the hitpoints out of a_RawDamage that the currently equipped armor would cover
 	virtual int GetArmorCoverAgainst(const cEntity * a_Attacker, eDamageType a_DamageType, int a_RawDamage);
-
+	
 	/// Returns the knockback amount that the currently equipped items would cause to a_Receiver on a hit
 	virtual double GetKnockbackAmountAgainst(const cEntity & a_Receiver);
-
+	
 	/// Returns the curently equipped weapon; empty item if none
 	virtual cItem GetEquippedWeapon(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped helmet; empty item if none
 	virtual cItem GetEquippedHelmet(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped chestplate; empty item if none
 	virtual cItem GetEquippedChestplate(void) const { return cItem(); }
 
 	/// Returns the currently equipped leggings; empty item if none
 	virtual cItem GetEquippedLeggings(void) const { return cItem(); }
-
+	
 	/// Returns the currently equipped boots; empty item if none
 	virtual cItem GetEquippedBoots(void) const { return cItem(); }
 
-	/// Called when the health drops below zero. a_Killer may be NULL (environmental damage)
+	/// Called when the health drops below zero. a_Killer may be nullptr (environmental damage)
 	virtual void KilledBy(TakeDamageInfo & a_TDI);
 
 	/// Called when the entity kills another entity
@@ -317,20 +317,20 @@ public:
 
 	/// Heals the specified amount of HPs
 	virtual void Heal(int a_HitPoints);
-
+	
 	/// Returns the health of this entity
 	int GetHealth(void) const { return m_Health; }
-
+	
 	/// Sets the health of this entity; doesn't broadcast any hurt animation
 	void SetHealth(int a_Health);
-
+	
 	// tolua_end
 
 	virtual void Tick(float a_Dt, cChunk & a_Chunk);
-
+	
 	/// Handles the physics of the entity - updates position based on speed, updates speed based on environment
 	virtual void HandlePhysics(float a_Dt, cChunk & a_Chunk);
-
+	
 	/// Updates the state related to this entity being on fire
 	virtual void TickBurning(cChunk & a_Chunk);
 
@@ -341,34 +341,34 @@ public:
 	Returns true if MoveToWorld() was called, false if not
 	*/
 	virtual bool DetectPortal(void);
-
+	
 	/// Handles when the entity is in the void
 	virtual void TickInVoid(cChunk & a_Chunk);
 
 	/// Called when the entity starts burning
 	virtual void OnStartedBurning(void);
-
+	
 	/// Called when the entity finishes burning
 	virtual void OnFinishedBurning(void);
-
+	
 	// tolua_begin
-
+	
 	/// Sets the maximum value for the health
 	void SetMaxHealth(int a_MaxHealth);
 
 	int GetMaxHealth(void) const { return m_MaxHealth; }
-
+	
 	/// Sets whether the entity is fireproof
 	void SetIsFireproof(bool a_IsFireproof);
-
+	
 	bool IsFireproof(void) const { return m_IsFireproof; }
-
+	
 	/// Puts the entity on fire for the specified amount of ticks
 	void StartBurning(int a_TicksLeftBurning);
-
+	
 	/// Stops the entity from burning, resets all burning timers
 	void StopBurning(void);
-
+	
 	// tolua_end
 
 	/** Descendants override this function to send a command to the specified client to spawn the entity on the client.
@@ -377,10 +377,10 @@ public:
 	virtual void SpawnOn(cClientHandle & a_Client) = 0;
 
 	// tolua_begin
-
+	
 	/// Teleports to the entity specified
 	virtual void TeleportToEntity(cEntity & a_Entity);
-
+	
 	/// Teleports to the coordinates specified
 	virtual void TeleportToCoords(double a_PosX, double a_PosY, double a_PosZ);
 
@@ -389,7 +389,7 @@ public:
 
 	/** Moves entity to specified world, taking a world name */
 	bool MoveToWorld(const AString & a_WorldName, bool a_ShouldSendRespawn = true);
-
+	
 	// tolua_end
 
 	virtual bool DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn);
@@ -399,16 +399,16 @@ public:
 
 	/** Sets the world the entity will be leaving */
 	void SetWorldTravellingFrom(cWorld * a_World) { m_WorldTravellingFrom = a_World; }
-
+	
 	/// Updates clients of changes in the entity.
-	virtual void BroadcastMovementUpdate(const cClientHandle * a_Exclude = NULL);
-
+	virtual void BroadcastMovementUpdate(const cClientHandle * a_Exclude = nullptr);
+	
 	/// Attaches to the specified entity; detaches from any previous one first
 	void AttachTo(cEntity * a_AttachTo);
-
+	
 	/// Detaches from the currently attached entity, if any
 	virtual void Detach(void);
-
+	
 	/// Makes sure head yaw is not over the specified range.
 	void WrapHeadYaw();
 
@@ -417,9 +417,9 @@ public:
 
 	/// Makes speed is not over 20. Max speed is 20 blocks / second
 	void WrapSpeed();
-
+	
 	// tolua_begin
-
+	
 	// COMMON metadata flags; descendants may override the defaults:
 	virtual bool IsOnFire   (void) const {return (m_TicksLeftBurning > 0); }
 	virtual bool IsCrouched (void) const {return false; }
@@ -437,20 +437,20 @@ public:
 
 	/** Gets number of ticks this entity has existed for */
 	long int GetTicksAlive(void) const { return m_TicksAlive; }
-
+	
 	/** Gets the invulnerable ticks from the entity */
 	int GetInvulnerableTicks(void) const { return m_InvulnerableTicks; }
 
 	/** Set the invulnerable ticks from the entity */
 	void SetInvulnerableTicks(int a_InvulnerableTicks) { m_InvulnerableTicks = a_InvulnerableTicks; }
-
+	
 	// tolua_end
-
+	
 	/// Called when the specified player right-clicks this entity
 	virtual void OnRightClicked(cPlayer & a_Player) {}
 
 	/// Returns the list of drops for this pawn when it is killed. May check a_Killer for special handling (sword of looting etc.). Called from KilledBy().
-	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = NULL)
+	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr)
 	{
 		UNUSED(a_Drops);
 		UNUSED(a_Killer);
@@ -462,38 +462,38 @@ public:
 protected:
 	static cCriticalSection m_CSCount;
 	static int m_EntityCount;
-
+	
 	/** Measured in meter/second (m/s) */
 	Vector3d m_Speed;
 
 	int m_UniqueID;
-
+	
 	int m_Health;
 	int m_MaxHealth;
-
-	/// The entity to which this entity is attached (vehicle), NULL if none
+	
+	/// The entity to which this entity is attached (vehicle), nullptr if none
 	cEntity * m_AttachedTo;
-
-	/// The entity which is attached to this entity (rider), NULL if none
+	
+	/// The entity which is attached to this entity (rider), nullptr if none
 	cEntity * m_Attachee;
 
 	/** Stores whether head yaw has been set manually */
 	bool m_bDirtyHead;
-
+	
 	/** Stores whether our yaw/pitch/roll (body orientation) has been set manually */
 	bool m_bDirtyOrientation;
-
+	
 	/** Stores whether we have sent a Velocity packet with a speed of zero (no speed) to the client
 	Ensures that said packet is sent only once */
 	bool m_bHasSentNoSpeed;
 
 	/** Stores if the entity is on the ground */
 	bool m_bOnGround;
-
+	
 	/** Stores gravity that is applied to an entity every tick
 	For realistic effects, this should be negative. For spaaaaaaace, this can be zero or even positive */
 	float m_Gravity;
-
+	
 	/** Last position sent to client via the Relative Move or Teleport packets (not Velocity)
 	Only updated if cEntity::BroadcastMovementUpdate() is called! */
 	Vector3d m_LastPos;
@@ -502,37 +502,37 @@ protected:
 	bool m_IsInitialized;
 
 	/** World entity is travelling from
-	Set to a valid world pointer by MoveToWorld; reset to NULL when the entity is removed from the old world
+	Set to a valid world pointer by MoveToWorld; reset to nullptr when the entity is removed from the old world
 	Can't be a simple boolean as context switches between worlds may leave the new chunk processing (and therefore immediately removing) the entity before the old chunk could remove it
 	*/
 	cWorld * m_WorldTravellingFrom;
 
 	eEntityType m_EntityType;
-
+	
 	cWorld * m_World;
-
+	
 	/// Whether the entity is capable of taking fire or lava damage.
 	bool m_IsFireproof;
 
 	/// Time, in ticks, since the last damage dealt by being on fire. Valid only if on fire (IsOnFire())
 	int m_TicksSinceLastBurnDamage;
-
+	
 	/// Time, in ticks, since the last damage dealt by standing in lava. Reset to zero when moving out of lava.
 	int m_TicksSinceLastLavaDamage;
-
+	
 	/// Time, in ticks, since the last damage dealt by standing in fire. Reset to zero when moving out of fire.
 	int m_TicksSinceLastFireDamage;
-
+	
 	/// Time, in ticks, until the entity extinguishes its fire
 	int m_TicksLeftBurning;
-
+	
 	/// Time, in ticks, since the last damage dealt by the void. Reset to zero when moving out of the void.
 	int m_TicksSinceLastVoidDamage;
-
+	
 	/** Does the actual speed-setting. The default implementation just sets the member variable value;
 	overrides can provide further processing, such as forcing players to move at the given speed. */
 	virtual void DoSetSpeed(double a_SpeedX, double a_SpeedY, double a_SpeedZ);
-
+	
 	virtual void Destroyed(void) {}  // Called after the entity has been destroyed
 
 	/** Applies friction to an entity
@@ -543,7 +543,7 @@ protected:
 
 	/** Called in each tick to handle air-related processing i.e. drowning */
 	virtual void HandleAir(void);
-
+	
 	/** Called once per tick to set IsSwimming and IsSubmerged */
 	virtual void SetSwimState(cChunk & a_Chunk);
 
@@ -568,29 +568,29 @@ protected:
 
 	/** Portal delay timer and cooldown boolean data */
 	sPortalCooldownData m_PortalCooldownData;
-
+	
 	/** The number of ticks this entity has been alive for */
 	long int m_TicksAlive;
-
+	
 private:
 	/** Measured in degrees, [-180, +180) */
 	double   m_HeadYaw;
-
+	
 	/** Measured in degrees, [-180, +180) */
 	Vector3d m_Rot;
-
+	
 	/** Position of the entity's XZ center and Y bottom */
 	Vector3d m_Pos;
-
+	
 	/** Measured in meter / second */
 	Vector3d m_WaterSpeed;
-
+	
 	/** Measured in Kilograms (Kg) */
 	double m_Mass;
-
+	
 	/** Width of the entity, in the XZ plane. Since entities are represented as cylinders, this is more of a diameter. */
 	double m_Width;
-
+	
 	/** Height of the entity (Y axis) */
 	double m_Height;
 
@@ -600,3 +600,7 @@ private:
 } ;  // tolua_export
 
 typedef std::list<cEntity *> cEntityList;
+
+
+
+
diff --git a/src/Entities/EntityEffect.cpp b/src/Entities/EntityEffect.cpp
index b1ddaa30e..bae686b77 100644
--- a/src/Entities/EntityEffect.cpp
+++ b/src/Entities/EntityEffect.cpp
@@ -216,7 +216,7 @@ cEntityEffect * cEntityEffect::CreateEntityEffect(cEntityEffect::eType a_EffectT
 	}
 	
 	ASSERT(!"Unhandled entity effect type!");
-	return NULL;
+	return nullptr;
 }
 
 
@@ -329,7 +329,7 @@ void cEntityEffectInstantHealth::OnActivate(cPawn & a_Target)
 	
 	if (a_Target.IsMob() && ((cMonster &) a_Target).IsUndead())
 	{
-		a_Target.TakeDamage(dtPotionOfHarming, NULL, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
+		a_Target.TakeDamage(dtPotionOfHarming, nullptr, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
 		return;
 	}
 	a_Target.Heal(amount);
@@ -352,7 +352,7 @@ void cEntityEffectInstantDamage::OnActivate(cPawn & a_Target)
 		a_Target.Heal(amount);
 		return;
 	}
-	a_Target.TakeDamage(dtPotionOfHarming, NULL, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
+	a_Target.TakeDamage(dtPotionOfHarming, nullptr, amount, 0);  // TODO: Store attacker in a pointer-safe way, pass to TakeDamage
 }
 
 
@@ -452,7 +452,7 @@ void cEntityEffectPoison::OnTick(cPawn & a_Target)
 		// Cannot take poison damage when health is at 1
 		if (a_Target.GetHealth() > 1)
 		{
-			a_Target.TakeDamage(dtPoisoning, NULL, 1, 0);
+			a_Target.TakeDamage(dtPoisoning, nullptr, 1, 0);
 		}
 	}
 }
@@ -473,7 +473,7 @@ void cEntityEffectWither::OnTick(cPawn & a_Target)
 
 	if ((m_Ticks % frequency) == 0)
 	{
-		a_Target.TakeDamage(dtWither, NULL, 1, 0);
+		a_Target.TakeDamage(dtWither, nullptr, 1, 0);
 	}
 }
 
diff --git a/src/Entities/ExpOrb.cpp b/src/Entities/ExpOrb.cpp
index 73d5cbfed..751308661 100644
--- a/src/Entities/ExpOrb.cpp
+++ b/src/Entities/ExpOrb.cpp
@@ -45,7 +45,7 @@ void cExpOrb::SpawnOn(cClientHandle & a_Client)
 void cExpOrb::Tick(float a_Dt, cChunk & a_Chunk)
 {
 	cPlayer * a_ClosestPlayer(m_World->FindClosestPlayer(Vector3f(GetPosition()), 5));
-	if (a_ClosestPlayer != NULL)
+	if (a_ClosestPlayer != nullptr)
 	{
 		Vector3f a_PlayerPos(a_ClosestPlayer->GetPosition());
 		a_PlayerPos.y++;
diff --git a/src/Entities/Floater.cpp b/src/Entities/Floater.cpp
index 159429147..5fe6a1238 100644
--- a/src/Entities/Floater.cpp
+++ b/src/Entities/Floater.cpp
@@ -22,7 +22,7 @@ public:
 		m_Pos(a_Pos),
 		m_NextPos(a_NextPos),
 		m_MinCoeff(1),
-		m_HitEntity(NULL)
+		m_HitEntity(nullptr)
 	{
 	}
 	virtual bool Item(cEntity * a_Entity) override
diff --git a/src/Entities/ItemFrame.cpp b/src/Entities/ItemFrame.cpp
index 6704c05b4..dfffcd3ed 100644
--- a/src/Entities/ItemFrame.cpp
+++ b/src/Entities/ItemFrame.cpp
@@ -62,7 +62,7 @@ void cItemFrame::KilledBy(TakeDamageInfo & a_TDI)
 		return;
 	}
 
-	if ((a_TDI.Attacker != NULL) && a_TDI.Attacker->IsPlayer() && !((cPlayer *)a_TDI.Attacker)->IsGameModeCreative())
+	if ((a_TDI.Attacker != nullptr) && a_TDI.Attacker->IsPlayer() && !((cPlayer *)a_TDI.Attacker)->IsGameModeCreative())
 	{
 		cItems Item;
 		Item.push_back(m_Item);
@@ -83,7 +83,7 @@ void cItemFrame::KilledBy(TakeDamageInfo & a_TDI)
 
 void cItemFrame::GetDrops(cItems & a_Items, cEntity * a_Killer)
 {
-	if ((a_Killer != NULL) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
+	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
 	{
 		a_Items.push_back(cItem(E_ITEM_ITEM_FRAME));
 	}
diff --git a/src/Entities/Minecart.cpp b/src/Entities/Minecart.cpp
index f45e7bb69..22e046800 100644
--- a/src/Entities/Minecart.cpp
+++ b/src/Entities/Minecart.cpp
@@ -36,7 +36,7 @@ public:
 
 	virtual bool Item(cEntity * a_Entity) override
 	{
-		ASSERT(a_Entity != NULL);
+		ASSERT(a_Entity != nullptr);
 
 		if (!a_Entity->IsPlayer() && !a_Entity->IsMob() && !a_Entity->IsMinecart() && !a_Entity->IsBoat())
 		{
@@ -130,7 +130,7 @@ void cMinecart::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 	int RelPosX = POSX_TOINT - a_Chunk.GetPosX() * cChunkDef::Width;
 	int RelPosZ = POSZ_TOINT - a_Chunk.GetPosZ() * cChunkDef::Width;
 	cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RelPosX, RelPosZ);
-	if (Chunk == NULL)
+	if (Chunk == nullptr)
 	{
 		// Inside an unloaded chunk, bail out all processing
 		return;
@@ -806,7 +806,7 @@ bool cMinecart::TestBlockCollision(NIBBLETYPE a_RailMeta)
 
 bool cMinecart::TestEntityCollision(NIBBLETYPE a_RailMeta)
 {
-	cMinecartCollisionCallback MinecartCollisionCallback(GetPosition(), GetHeight(), GetWidth(), GetUniqueID(), ((m_Attachee == NULL) ? -1 : m_Attachee->GetUniqueID()));
+	cMinecartCollisionCallback MinecartCollisionCallback(GetPosition(), GetHeight(), GetWidth(), GetUniqueID(), ((m_Attachee == nullptr) ? -1 : m_Attachee->GetUniqueID()));
 	int ChunkX, ChunkZ;
 	cChunkDef::BlockToChunk(POSX_TOINT, POSZ_TOINT, ChunkX, ChunkZ);
 	m_World->ForEachEntityInChunk(ChunkX, ChunkZ, MinecartCollisionCallback);
@@ -980,7 +980,7 @@ bool cMinecart::TestEntityCollision(NIBBLETYPE a_RailMeta)
 
 bool cMinecart::DoTakeDamage(TakeDamageInfo & TDI)
 {
-	if ((TDI.Attacker != NULL) && TDI.Attacker->IsPlayer() && ((cPlayer *)TDI.Attacker)->IsGameModeCreative())
+	if ((TDI.Attacker != nullptr) && TDI.Attacker->IsPlayer() && ((cPlayer *)TDI.Attacker)->IsGameModeCreative())
 	{
 		Destroy();
 		TDI.FinalDamage = GetMaxHealth();  // Instant hit for creative
@@ -1074,7 +1074,7 @@ void cRideableMinecart::OnRightClicked(cPlayer & a_Player)
 {
 	super::OnRightClicked(a_Player);
 
-	if (m_Attachee != NULL)
+	if (m_Attachee != nullptr)
 	{
 		if (m_Attachee->GetUniqueID() == a_Player.GetUniqueID())
 		{
@@ -1120,14 +1120,14 @@ void cMinecartWithChest::OnRightClicked(cPlayer & a_Player)
 {
 	// If the window is not created, open it anew:
 	cWindow * Window = GetWindow();
-	if (Window == NULL)
+	if (Window == nullptr)
 	{
 		OpenNewWindow();
 		Window = GetWindow();
 	}
 
 	// Open the window for the player:
-	if (Window != NULL)
+	if (Window != nullptr)
 	{
 		if (a_Player.GetWindow() != Window)
 		{
diff --git a/src/Entities/Minecart.h b/src/Entities/Minecart.h
index ab906fd06..40e22c641 100644
--- a/src/Entities/Minecart.h
+++ b/src/Entities/Minecart.h
@@ -140,9 +140,9 @@ protected:
 	{
 		UNUSED(a_SlotNum);
 		ASSERT(a_Grid == &m_Contents);
-		if (m_World != NULL)
+		if (m_World != nullptr)
 		{
-			if (GetWindow() != NULL)
+			if (GetWindow() != nullptr)
 			{
 				GetWindow()->BroadcastWholeWindow();
 			}
diff --git a/src/Entities/Painting.cpp b/src/Entities/Painting.cpp
index e217556c7..1aa6da0a1 100644
--- a/src/Entities/Painting.cpp
+++ b/src/Entities/Painting.cpp
@@ -43,7 +43,7 @@ void cPainting::Tick(float a_Dt, cChunk & a_Chunk)
 
 void cPainting::GetDrops(cItems & a_Items, cEntity * a_Killer)
 {
-	if ((a_Killer != NULL) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
+	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
 	{
 		a_Items.push_back(cItem(E_ITEM_PAINTING));
 	}
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 6bd0a3d20..790147fd3 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -56,8 +56,8 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	m_Stance(0.0),
 	m_Inventory(*this),
 	m_EnderChestContents(9, 3),
-	m_CurrentWindow(NULL),
-	m_InventoryWindow(NULL),
+	m_CurrentWindow(nullptr),
+	m_InventoryWindow(nullptr),
 	m_GameMode(eGameMode_NotSet),
 	m_IP(""),
 	m_ClientHandle(a_Client),
@@ -78,10 +78,10 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	m_IsChargingBow(false),
 	m_BowCharge(0),
 	m_FloaterID(-1),
-	m_Team(NULL),
+	m_Team(nullptr),
 	m_TicksUntilNextSave(PLAYER_INVENTORY_SAVE_INTERVAL),
 	m_bIsTeleporting(false),
-	m_UUID((a_Client != NULL) ? a_Client->GetUUID() : ""),
+	m_UUID((a_Client != nullptr) ? a_Client->GetUUID() : ""),
 	m_CustomName("")
 {
 	m_InventoryWindow = new cInventoryWindow(*this);
@@ -96,7 +96,7 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName) :
 	
 	m_PlayerName = a_PlayerName;
 
-	cWorld * World = NULL;
+	cWorld * World = nullptr;
 	if (!LoadFromDisk(World))
 	{
 		m_Inventory.Clear();
@@ -144,10 +144,10 @@ cPlayer::~cPlayer(void)
 
 	SaveToDisk();
 
-	m_ClientHandle = NULL;
+	m_ClientHandle = nullptr;
 	
 	delete m_InventoryWindow;
-	m_InventoryWindow = NULL;
+	m_InventoryWindow = nullptr;
 	
 	LOGD("Player %p deleted", this);
 }
@@ -186,12 +186,12 @@ void cPlayer::SpawnOn(cClientHandle & a_Client)
 
 void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		if (m_ClientHandle->IsDestroyed())
 		{
 			// This should not happen, because destroying a client will remove it from the world, but just in case
-			m_ClientHandle = NULL;
+			m_ClientHandle = nullptr;
 			return;
 		}
 		
@@ -504,7 +504,7 @@ void cPlayer::SetTouchGround(bool a_bTouchGround)
 		if (Damage > 0)
 		{
 			// cPlayer makes sure damage isn't applied in creative, no need to check here
-			TakeDamage(dtFalling, NULL, Damage, Damage, 0);
+			TakeDamage(dtFalling, nullptr, Damage, Damage, 0);
 			
 			// Fall particles
 			GetWorld()->BroadcastSoundParticleEffect(2006, POSX_TOINT, (int)GetPosY() - 1, POSZ_TOINT, Damage /* Used as particle effect speed modifier */);
@@ -651,7 +651,7 @@ void cPlayer::AbortEating(void)
 
 void cPlayer::SendHealth(void)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		m_ClientHandle->SendHealth();
 	}
@@ -663,7 +663,7 @@ void cPlayer::SendHealth(void)
 
 void cPlayer::SendExperience(void)
 {
-	if (m_ClientHandle != NULL)
+	if (m_ClientHandle != nullptr)
 	{
 		m_ClientHandle->SendExperience();
 		m_bDirtyExperience = false;
@@ -859,11 +859,11 @@ bool cPlayer::DoTakeDamage(TakeDamageInfo & a_TDI)
 		}
 	}
 
-	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	if ((a_TDI.Attacker != nullptr) && (a_TDI.Attacker->IsPlayer()))
 	{
 		cPlayer * Attacker = (cPlayer *)a_TDI.Attacker;
 
-		if ((m_Team != NULL) && (m_Team == Attacker->m_Team))
+		if ((m_Team != nullptr) && (m_Team == Attacker->m_Team))
 		{
 			if (!m_Team->AllowsFriendlyFire())
 			{
@@ -915,7 +915,7 @@ void cPlayer::KilledBy(TakeDamageInfo & a_TDI)
 	m_World->SpawnItemPickups(Pickups, GetPosX(), GetPosY(), GetPosZ(), 10);
 	SaveToDisk();  // Save it, yeah the world is a tough place !
 
-	if ((a_TDI.Attacker == NULL) && m_World->ShouldBroadcastDeathMessages())
+	if ((a_TDI.Attacker == nullptr) && m_World->ShouldBroadcastDeathMessages())
 	{
 		AString DamageText;
 		switch (a_TDI.DamageType)
@@ -941,7 +941,7 @@ void cPlayer::KilledBy(TakeDamageInfo & a_TDI)
 		}
 		GetWorld()->BroadcastChatDeath(Printf("%s %s", GetName().c_str(), DamageText.c_str()));
 	}
-	else if (a_TDI.Attacker == NULL)  // && !m_World->ShouldBroadcastDeathMessages() by fallthrough
+	else if (a_TDI.Attacker == nullptr)  // && !m_World->ShouldBroadcastDeathMessages() by fallthrough
 	{
 		// no-op
 	}
@@ -997,7 +997,7 @@ void cPlayer::Killed(cEntity * a_Victim)
 
 void cPlayer::Respawn(void)
 {
-	ASSERT(m_World != NULL);
+	ASSERT(m_World != nullptr);
 
 	m_Health = GetMaxHealth();
 	SetInvulnerableTicks(20);
@@ -1107,9 +1107,9 @@ void cPlayer::SetTeam(cTeam * a_Team)
 
 cTeam * cPlayer::UpdateTeam(void)
 {
-	if (m_World == NULL)
+	if (m_World == nullptr)
 	{
-		SetTeam(NULL);
+		SetTeam(nullptr);
 	}
 	else
 	{
@@ -1142,7 +1142,7 @@ void cPlayer::OpenWindow(cWindow * a_Window)
 
 void cPlayer::CloseWindow(bool a_CanRefuse)
 {
-	if (m_CurrentWindow == NULL)
+	if (m_CurrentWindow == nullptr)
 	{
 		m_CurrentWindow = m_InventoryWindow;
 		return;
@@ -1167,7 +1167,7 @@ void cPlayer::CloseWindow(bool a_CanRefuse)
 
 void cPlayer::CloseWindowIfID(char a_WindowID, bool a_CanRefuse)
 {
-	if ((m_CurrentWindow == NULL) || (m_CurrentWindow->GetWindowID() != a_WindowID))
+	if ((m_CurrentWindow == nullptr) || (m_CurrentWindow->GetWindowID() != a_WindowID))
 	{
 		return;
 	}
@@ -1354,7 +1354,7 @@ void cPlayer::MoveTo( const Vector3d & a_NewPos)
 		// Y = -999 and X, Z = attempting to create speed, usually up to 0.03
 		// We cannot test m_AttachedTo, because when deattaching, the server thinks the client is already deattached while
 		// the client may still send more of these nonsensical packets.
-		if (m_AttachedTo != NULL)
+		if (m_AttachedTo != nullptr)
 		{
 			Vector3d AddSpeed(a_NewPos);
 			AddSpeed.y = 0;
@@ -1581,7 +1581,7 @@ void cPlayer::TossItems(const cItems & a_Items)
 
 bool cPlayer::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 {
-	ASSERT(a_World != NULL);
+	ASSERT(a_World != nullptr);
 
 	if (GetWorld() == a_World)
 	{
@@ -1590,7 +1590,7 @@ bool cPlayer::DoMoveToWorld(cWorld * a_World, bool a_ShouldSendRespawn)
 	}
 	
 	// Send the respawn packet:
-	if (a_ShouldSendRespawn && (m_ClientHandle != NULL))
+	if (a_ShouldSendRespawn && (m_ClientHandle != nullptr))
 	{
 		m_ClientHandle->SendRespawn(a_World->GetDimension());
 	}
@@ -1652,7 +1652,7 @@ bool cPlayer::LoadFromDisk(cWorldPtr & a_World)
 		GetName().c_str(), m_UUID.c_str(), OfflineUUID.c_str(), OfflineUsage
 	);
 
-	if (a_World == NULL)
+	if (a_World == nullptr)
 	{
 		a_World = cRoot::Get()->GetDefaultWorld();
 	}
@@ -1729,7 +1729,7 @@ bool cPlayer::LoadFromFile(const AString & a_FileName, cWorldPtr & a_World)
 
 	m_LoadedWorldName = root.get("world", "world").asString();
 	a_World = cRoot::Get()->GetWorld(GetLoadedWorldName(), false);
-	if (a_World == NULL)
+	if (a_World == nullptr)
 	{
 		a_World = cRoot::Get()->GetDefaultWorld();
 	}
@@ -1795,7 +1795,7 @@ bool cPlayer::SaveToDisk()
 	root["SpawnY"]              = GetLastBedPos().y;
 	root["SpawnZ"]              = GetLastBedPos().z;
 
-	if (m_World != NULL)
+	if (m_World != nullptr)
 	{
 		root["world"] = m_World->GetName();
 		if (m_GameMode == m_World->GetGameMode())
@@ -1949,7 +1949,7 @@ void cPlayer::HandleFood(void)
 			else if ((m_FoodLevel <= 0) && (m_Health > 1))
 			{
 				// Damage from starving
-				TakeDamage(dtStarving, NULL, 1, 1, 0);
+				TakeDamage(dtStarving, nullptr, 1, 1, 0);
 			}
 		}
 	}
@@ -2018,7 +2018,7 @@ void cPlayer::UpdateMovementStats(const Vector3d & a_DeltaPos)
 {
 	StatValue Value = (StatValue)floor(a_DeltaPos.Length() * 100 + 0.5);
 
-	if (m_AttachedTo == NULL)
+	if (m_AttachedTo == nullptr)
 	{
 		if (IsClimbing())
 		{
@@ -2091,7 +2091,7 @@ void cPlayer::ApplyFoodExhaustionFromMovement()
 	}
 
 	// If riding anything, apply no food exhaustion
-	if (m_AttachedTo != NULL)
+	if (m_AttachedTo != nullptr)
 	{
 		return;
 	}
diff --git a/src/Entities/Player.h b/src/Entities/Player.h
index 22d6a2ae2..4bb51b556 100644
--- a/src/Entities/Player.h
+++ b/src/Entities/Player.h
@@ -176,10 +176,10 @@ public:
 	
 	AString GetIP(void) const { return m_IP; }  // tolua_export
 
-	/** Returns the associated team, NULL if none */
+	/** Returns the associated team, nullptr if none */
 	cTeam * GetTeam(void) { return m_Team; }  // tolua_export
 
-	/** Sets the player team, NULL if none */
+	/** Sets the player team, nullptr if none */
 	void SetTeam(cTeam * a_Team);
 
 	// tolua_end
diff --git a/src/Entities/ProjectileEntity.cpp b/src/Entities/ProjectileEntity.cpp
index ab25ac30c..1768714f8 100644
--- a/src/Entities/ProjectileEntity.cpp
+++ b/src/Entities/ProjectileEntity.cpp
@@ -135,7 +135,7 @@ public:
 		m_Pos(a_Pos),
 		m_NextPos(a_NextPos),
 		m_MinCoeff(1),
-		m_HitEntity(NULL)
+		m_HitEntity(nullptr)
 	{
 	}
 	
@@ -221,9 +221,9 @@ cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a
 	super(etProjectile, a_X, a_Y, a_Z, a_Width, a_Height),
 	m_ProjectileKind(a_Kind),
 	m_CreatorData(
-		((a_Creator != NULL) ? a_Creator->GetUniqueID() : -1),
-		((a_Creator != NULL) ? (a_Creator->IsPlayer() ? ((cPlayer *)a_Creator)->GetName() : "") : ""),
-		((a_Creator != NULL) ? a_Creator->GetEquippedWeapon().m_Enchantments : cEnchantments())
+		((a_Creator != nullptr) ? a_Creator->GetUniqueID() : -1),
+		((a_Creator != nullptr) ? (a_Creator->IsPlayer() ? ((cPlayer *)a_Creator)->GetName() : "") : ""),
+		((a_Creator != nullptr) ? a_Creator->GetEquippedWeapon().m_Enchantments : cEnchantments())
 	),
 	m_IsInGround(false)
 {
@@ -251,7 +251,7 @@ cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Ve
 cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed)
 {
 	Vector3d Speed;
-	if (a_Speed != NULL)
+	if (a_Speed != nullptr)
 	{
 		Speed = *a_Speed;
 	}
@@ -269,10 +269,10 @@ cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator,
 		case pkWitherSkull:   return new cWitherSkullEntity     (a_Creator, a_X, a_Y, a_Z, Speed);
 		case pkFirework:
 		{
-			ASSERT(a_Item != NULL);
+			ASSERT(a_Item != nullptr);
 			if (a_Item->m_FireworkItem.m_Colours.empty())
 			{
-				return NULL;
+				return nullptr;
 			}
 
 			return new cFireworkEntity(a_Creator, a_X, a_Y, a_Z, *a_Item);
@@ -280,7 +280,7 @@ cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator,
 	}
 	
 	LOGWARNING("%s: Unknown projectile kind: %d", __FUNCTION__, a_Kind);
-	return NULL;
+	return nullptr;
 }
 
 
diff --git a/src/Entities/ProjectileEntity.h b/src/Entities/ProjectileEntity.h
index b9d2dfa63..2a98e31c7 100644
--- a/src/Entities/ProjectileEntity.h
+++ b/src/Entities/ProjectileEntity.h
@@ -46,7 +46,7 @@ public:
 	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
 	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Vector3d & a_Pos, const Vector3d & a_Speed, double a_Width, double a_Height);
 	
-	static cProjectileEntity * Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed = NULL);
+	static cProjectileEntity * Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const cItem * a_Item, const Vector3d * a_Speed = nullptr);
 	
 	/** Called by the physics blocktracer when the entity hits a solid block, the hit position and the face hit (BLOCK_FACE_) is given */
 	virtual void OnHitSolidBlock(const Vector3d & a_HitPos, eBlockFace a_HitFace);
@@ -110,7 +110,7 @@ protected:
 	eKind m_ProjectileKind;
 	
 	/** The structure for containing the entity ID and name who has created this projectile
-	The ID and/or name may be NULL (e.g. for dispensers/mobs)
+	The ID and/or name may be nullptr (e.g. for dispensers/mobs)
 	*/
 	CreatorData m_CreatorData;