8 files changed, 11 insertions, 11 deletions
diff --git a/src/Simulator/DelayedFluidSimulator.cpp b/src/Simulator/DelayedFluidSimulator.cpp
index 59ea51aa0..dc8dffe2d 100644
--- a/src/Simulator/DelayedFluidSimulator.cpp
+++ b/src/Simulator/DelayedFluidSimulator.cpp
@@ -55,7 +55,7 @@ cDelayedFluidSimulatorChunkData::cDelayedFluidSimulatorChunkData(int a_TickDelay
 cDelayedFluidSimulatorChunkData::~cDelayedFluidSimulatorChunkData()
 {
 	delete[] m_Slots;
-	m_Slots = NULL;
+	m_Slots = nullptr;
 }
 
 
@@ -86,7 +86,7 @@ void cDelayedFluidSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ,
 		return;
 	}
 	
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
diff --git a/src/Simulator/FireSimulator.cpp b/src/Simulator/FireSimulator.cpp
index d3deee74a..75ebefcf7 100644
--- a/src/Simulator/FireSimulator.cpp
+++ b/src/Simulator/FireSimulator.cpp
@@ -220,7 +220,7 @@ bool cFireSimulator::DoesBurnForever(BLOCKTYPE a_BlockType)
 
 void cFireSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
@@ -359,7 +359,7 @@ void cFireSimulator::RemoveFuelNeighbors(cChunk * a_Chunk, int a_RelX, int a_Rel
 		int Z = a_RelZ + gNeighborCoords[i].z;
 
 		cChunkPtr Neighbour = a_Chunk->GetRelNeighborChunkAdjustCoords(X, Z);
-		if (Neighbour == NULL)
+		if (Neighbour == nullptr)
 		{
 			continue;
 		}
diff --git a/src/Simulator/FloodyFluidSimulator.cpp b/src/Simulator/FloodyFluidSimulator.cpp
index b839aa746..e95ef216d 100644
--- a/src/Simulator/FloodyFluidSimulator.cpp
+++ b/src/Simulator/FloodyFluidSimulator.cpp
@@ -220,7 +220,7 @@ void cFloodyFluidSimulator::SpreadToNeighbor(cChunk * a_NearChunk, int a_RelX, i
 	ASSERT(a_NewMeta > 0);  // Source blocks aren't spread
 
 	a_NearChunk = a_NearChunk->GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-	if ((a_NearChunk == NULL) || (!a_NearChunk->IsValid()))
+	if ((a_NearChunk == nullptr) || (!a_NearChunk->IsValid()))
 	{
 		// Chunk not available
 		return;
@@ -297,7 +297,7 @@ void cFloodyFluidSimulator::SpreadToNeighbor(cChunk * a_NearChunk, int a_RelX, i
 				ChunkInterface,
 				m_World,
 				PluginInterface,
-				NULL,
+				nullptr,
 				BlockX,
 				a_RelY,
 				BlockZ
diff --git a/src/Simulator/FluidSimulator.cpp b/src/Simulator/FluidSimulator.cpp
index 58501326f..9c8453d04 100644
--- a/src/Simulator/FluidSimulator.cpp
+++ b/src/Simulator/FluidSimulator.cpp
@@ -178,7 +178,7 @@ Direction cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a
 		
 		}
 		delete Pos;
-		Pos = NULL;
+		Pos = nullptr;
 	}
 
 	if (LowestPoint == m_World.GetBlockMeta(a_X, a_Y, a_Z))
diff --git a/src/Simulator/FluidSimulator.h b/src/Simulator/FluidSimulator.h
index 0877a7bf1..d65a8e78b 100644
--- a/src/Simulator/FluidSimulator.h
+++ b/src/Simulator/FluidSimulator.h
@@ -51,7 +51,7 @@ public:
 	virtual Direction GetFlowingDirection(int a_X, int a_Y, int a_Z, bool a_Over = true);
 	
 	/// Creates a ChunkData object for the simulator to use. The simulator returns the correct object type.
-	virtual cFluidSimulatorData * CreateChunkData(void) { return NULL; }
+	virtual cFluidSimulatorData * CreateChunkData(void) { return nullptr; }
 	
 	bool IsFluidBlock          (BLOCKTYPE a_BlockType) const { return (a_BlockType == m_FluidBlock); }
 	bool IsStationaryFluidBlock(BLOCKTYPE a_BlockType) const { return (a_BlockType == m_StationaryFluidBlock); }
diff --git a/src/Simulator/NoopRedstoneSimulator.h b/src/Simulator/NoopRedstoneSimulator.h
index 7c961f32b..832b26dfc 100644
--- a/src/Simulator/NoopRedstoneSimulator.h
+++ b/src/Simulator/NoopRedstoneSimulator.h
@@ -39,7 +39,7 @@ public:
 	
 	virtual cRedstoneSimulatorChunkData * CreateChunkData() override
 	{
-		return NULL;
+		return nullptr;
 	}
 
 } ;
diff --git a/src/Simulator/SandSimulator.cpp b/src/Simulator/SandSimulator.cpp
index aad41e463..073518b31 100644
--- a/src/Simulator/SandSimulator.cpp
+++ b/src/Simulator/SandSimulator.cpp
@@ -94,7 +94,7 @@ bool cSandSimulator::IsAllowedBlock(BLOCKTYPE a_BlockType)
 
 void cSandSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if ((a_Chunk == NULL) || !a_Chunk->IsValid())
+	if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
 	{
 		return;
 	}
diff --git a/src/Simulator/VaporizeFluidSimulator.cpp b/src/Simulator/VaporizeFluidSimulator.cpp
index 484cac334..119742346 100644
--- a/src/Simulator/VaporizeFluidSimulator.cpp
+++ b/src/Simulator/VaporizeFluidSimulator.cpp
@@ -22,7 +22,7 @@ cVaporizeFluidSimulator::cVaporizeFluidSimulator(cWorld & a_World, BLOCKTYPE a_F
 
 void cVaporizeFluidSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk)
 {
-	if (a_Chunk == NULL)
+	if (a_Chunk == nullptr)
 	{
 		return;
 	}