44 files changed, 202 insertions, 211 deletions

diff --git a/src/Bindings/DeprecatedBindings.cpp b/src/Bindings/DeprecatedBindings.cpp
index ea7d9bf2a..d46d565bd 100644
--- a/src/Bindings/DeprecatedBindings.cpp
+++ b/src/Bindings/DeprecatedBindings.cpp
@@ -500,7 +500,7 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 		}
 		#endif
 		{
-			bool res = self->SetSignLines(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4, Player);
+			bool res = self->SetSignLines({BlockX, BlockY, BlockZ}, Line1, Line2, Line3, Line4, Player);
 			tolua_pushboolean(LuaState, res ? 1 : 0);
 		}
 	}
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index 21b617528..2d92c1d3b 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -1638,7 +1638,7 @@ static int tolua_cPlayer_PlaceBlock(lua_State * tolua_S)
 	NIBBLETYPE BlockMeta;
 	L.GetStackValues(1, Self, Position, BlockType, BlockMeta);
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
diff --git a/src/Bindings/ManualBindings_World.cpp b/src/Bindings/ManualBindings_World.cpp
index 25164f958..72778e2bd 100644
--- a/src/Bindings/ManualBindings_World.cpp
+++ b/src/Bindings/ManualBindings_World.cpp
@@ -747,7 +747,7 @@ static int tolua_cWorld_FastSetBlock(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -903,7 +903,7 @@ static int tolua_cWorld_GetBlock(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		L.Push(E_BLOCK_AIR);
 		return 1;
@@ -959,7 +959,7 @@ static int tolua_cWorld_GetBlockBlockLight(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -1016,7 +1016,7 @@ static int tolua_cWorld_GetBlockInfo(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -1083,7 +1083,7 @@ static int tolua_cWorld_GetBlockMeta(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		L.Push(0);
 		return 1;
@@ -1139,7 +1139,7 @@ static int tolua_cWorld_GetBlockSkyLight(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -1196,7 +1196,7 @@ static int tolua_cWorld_GetBlockTypeMeta(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		L.Push(E_BLOCK_AIR, 0);
 		return 2;
@@ -1470,7 +1470,7 @@ static int tolua_cWorld_SetBlock(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -1528,7 +1528,7 @@ static int tolua_cWorld_SetBlockMeta(lua_State * tolua_S)
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'self'");
 	}
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return cManualBindings::lua_do_error(tolua_S, "Error in function call '#funcname#': Invalid 'position'");
 	}
@@ -1570,7 +1570,7 @@ static int tolua_cWorld_SetSignLines(lua_State * tolua_S)
 	}
 
 	// Call the function:
-	bool res = Self->SetSignLines(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4);
+	bool res = Self->SetSignLines({BlockX, BlockY, BlockZ}, Line1, Line2, Line3, Line4);
 
 	// Push the returned values:
 	L.Push(res);
diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index e9cd60242..65ada4682 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -445,8 +445,8 @@ bool cBlockArea::IsValidCoords(const Vector3i & a_Coords) const
 bool cBlockArea::Read(cForEachChunkProvider & a_ForEachChunkProvider, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes)
 {
 	ASSERT(IsValidDataTypeCombination(a_DataTypes));
-	ASSERT(cChunkDef::IsValidHeight(a_MinBlockY));
-	ASSERT(cChunkDef::IsValidHeight(a_MaxBlockY));
+	ASSERT(cChunkDef::IsValidHeight({a_MinBlockX, a_MinBlockY, a_MinBlockZ}));
+	ASSERT(cChunkDef::IsValidHeight({a_MaxBlockX, a_MaxBlockY, a_MaxBlockZ}));
 	ASSERT(a_MinBlockX <= a_MaxBlockX);
 	ASSERT(a_MinBlockY <= a_MaxBlockY);
 	ASSERT(a_MinBlockZ <= a_MaxBlockZ);
@@ -518,8 +518,8 @@ bool cBlockArea::Read(cForEachChunkProvider & a_ForEachChunkProvider, const Vect
 bool cBlockArea::Write(cForEachChunkProvider & a_ForEachChunkProvider, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes)
 {
 	ASSERT((a_DataTypes & GetDataTypes()) == a_DataTypes);  // Are you requesting only the data that I have?
-	ASSERT(cChunkDef::IsValidHeight(a_MinBlockY));
-	ASSERT(cChunkDef::IsValidHeight(a_MinBlockY + m_Size.y - 1));
+	ASSERT(cChunkDef::IsValidHeight({a_MinBlockX, a_MinBlockY, a_MinBlockZ}));
+	ASSERT(cChunkDef::IsValidHeight({a_MinBlockX, a_MinBlockY + m_Size.y - 1, a_MinBlockZ}));
 
 	return a_ForEachChunkProvider.WriteBlockArea(*this, a_MinBlockX, a_MinBlockY, a_MinBlockZ, a_DataTypes);
 }
diff --git a/src/BlockEntities/SignEntity.cpp b/src/BlockEntities/SignEntity.cpp
index b9b0cbb44..a2609d234 100644
--- a/src/BlockEntities/SignEntity.cpp
+++ b/src/BlockEntities/SignEntity.cpp
@@ -16,7 +16,7 @@ cSignEntity::cSignEntity(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, Vector3i
 	Super(a_BlockType, a_BlockMeta, a_Pos, a_World)
 {
 	ASSERT((a_BlockType ==  E_BLOCK_WALLSIGN) || (a_BlockType == E_BLOCK_SIGN_POST));
-	ASSERT(cChunkDef::IsValidHeight(a_Pos.y));
+	ASSERT(cChunkDef::IsValidHeight(a_Pos));
 }
 
 
diff --git a/src/Blocks/BlockButton.h b/src/Blocks/BlockButton.h
index 896fd58d6..d703d73bd 100644
--- a/src/Blocks/BlockButton.h
+++ b/src/Blocks/BlockButton.h
@@ -127,7 +127,7 @@ private:
 	virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
 	{
 		auto SupportRelPos = AddFaceDirection(a_Position, BlockMetaDataToBlockFace(a_Meta), true);
-		if (!cChunkDef::IsValidHeight(SupportRelPos.y))
+		if (!cChunkDef::IsValidHeight(SupportRelPos))
 		{
 			return false;
 		}
diff --git a/src/Blocks/BlockFarmland.h b/src/Blocks/BlockFarmland.h
index 3d1666859..7ed1bb035 100644
--- a/src/Blocks/BlockFarmland.h
+++ b/src/Blocks/BlockFarmland.h
@@ -61,7 +61,7 @@ private:
 		}
 
 		// Farmland too dry. If nothing is growing on top, turn back to dirt:
-		auto UpperBlock = cChunkDef::IsValidHeight(a_RelPos.y + 1) ? a_Chunk.GetBlock(a_RelPos.addedY(1)) : E_BLOCK_AIR;
+		auto UpperBlock = cChunkDef::IsValidHeight(a_RelPos.addedY(1)) ? a_Chunk.GetBlock(a_RelPos.addedY(1)) : E_BLOCK_AIR;
 		switch (UpperBlock)
 		{
 			case E_BLOCK_BEETROOTS:
diff --git a/src/Blocks/BlockFluid.h b/src/Blocks/BlockFluid.h
index b39476c1d..ab71ee7c3 100644
--- a/src/Blocks/BlockFluid.h
+++ b/src/Blocks/BlockFluid.h
@@ -88,7 +88,7 @@ private:
 		// Check if it's fuel:
 		BLOCKTYPE BlockType;
 		if (
-			!cChunkDef::IsValidHeight(Pos.y) ||
+			!cChunkDef::IsValidHeight(Pos) ||
 			!a_Chunk.UnboundedRelGetBlockType(Pos, BlockType) ||
 			!cFireSimulator::IsFuel(BlockType)
 		)
@@ -110,7 +110,7 @@ private:
 		{
 			auto NeighborPos = Pos + CrossCoords[i];
 			if (
-				cChunkDef::IsValidHeight(NeighborPos.y) &&
+				cChunkDef::IsValidHeight(NeighborPos) &&
 				a_Chunk.UnboundedRelGetBlockType(NeighborPos, BlockType) &&
 				(BlockType == E_BLOCK_AIR)
 			)
diff --git a/src/Blocks/BlockGrass.h b/src/Blocks/BlockGrass.h
index 09af250c3..412291382 100644
--- a/src/Blocks/BlockGrass.h
+++ b/src/Blocks/BlockGrass.h
@@ -99,7 +99,7 @@ private:
 	static Survivability DetermineSurvivability(cChunk & a_Chunk, const Vector3i a_RelPos)
 	{
 		const auto AbovePos = a_RelPos.addedY(1);
-		if (!cChunkDef::IsValidHeight(AbovePos.y))
+		if (!cChunkDef::IsValidHeight(AbovePos))
 		{
 			return Survivability::CanSpread;
 		}
@@ -126,7 +126,7 @@ private:
 	/** Attempt to spread grass to a block at the given position. */
 	static void TrySpreadTo(cChunk & a_Chunk, Vector3i a_RelPos)
 	{
-		if (!cChunkDef::IsValidHeight(a_RelPos.y))
+		if (!cChunkDef::IsValidHeight(a_RelPos))
 		{
 			// Y Coord out of range
 			return;
diff --git a/src/Blocks/BlockHandler.cpp b/src/Blocks/BlockHandler.cpp
index de9d37428..4b0d7e5ec 100644
--- a/src/Blocks/BlockHandler.cpp
+++ b/src/Blocks/BlockHandler.cpp
@@ -486,7 +486,7 @@ void cBlockHandler::OnNeighborChanged(cChunkInterface & a_ChunkInterface, Vector
 
 void cBlockHandler::NeighborChanged(cChunkInterface & a_ChunkInterface, Vector3i a_NeighborPos, eBlockFace a_WhichNeighbor)
 {
-	if (!cChunkDef::IsValidHeight(a_NeighborPos.y))
+	if (!cChunkDef::IsValidHeight(a_NeighborPos))
 	{
 		return;
 	}
diff --git a/src/Blocks/BlockLever.h b/src/Blocks/BlockLever.h
index ddb459fbe..bf6f911a1 100644
--- a/src/Blocks/BlockLever.h
+++ b/src/Blocks/BlockLever.h
@@ -94,7 +94,7 @@ private:
 		// Find the type of block the lever is attached to:
 		auto NeighborFace = BlockMetaDataToBlockFace(a_Meta);
 		auto NeighborPos = AddFaceDirection(a_Position, NeighborFace, true);
-		if (!cChunkDef::IsValidHeight(NeighborPos.y))
+		if (!cChunkDef::IsValidHeight(NeighborPos))
 		{
 			return false;
 		}
diff --git a/src/Blocks/BlockLilypad.h b/src/Blocks/BlockLilypad.h
index 6d25a0e2d..e39d34566 100644
--- a/src/Blocks/BlockLilypad.h
+++ b/src/Blocks/BlockLilypad.h
@@ -31,7 +31,7 @@ private:
 	virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
 	{
 		auto UnderPos = a_Position.addedY(-1);
-		if (!cChunkDef::IsValidHeight(UnderPos.y))
+		if (!cChunkDef::IsValidHeight(UnderPos))
 		{
 			return false;
 		}
diff --git a/src/Blocks/BlockPiston.cpp b/src/Blocks/BlockPiston.cpp
index afed8bae0..124757b44 100644
--- a/src/Blocks/BlockPiston.cpp
+++ b/src/Blocks/BlockPiston.cpp
@@ -215,7 +215,7 @@ bool cBlockPistonHandler::CanPushBlock(
 	Vector3iSet & a_BlocksPushed, const Vector3i & a_PushDir
 )
 {
-	if (!cChunkDef::IsValidHeight(a_BlockPos.y))
+	if (!cChunkDef::IsValidHeight(a_BlockPos))
 	{
 		// Can't push a void block.
 		return false;
@@ -299,7 +299,7 @@ void cBlockPistonHandler::OnBroken(
 
 	const auto Extension = a_BlockPos + MetadataToOffset(a_OldBlockMeta);
 	if (
-		cChunkDef::IsValidHeight(Extension.y) &&
+		cChunkDef::IsValidHeight(Extension) &&
 		(a_ChunkInterface.GetBlock(Extension) == E_BLOCK_PISTON_EXTENSION)
 	)
 	{
@@ -324,7 +324,7 @@ void cBlockPistonHeadHandler::OnBroken(
 {
 	UNUSED(a_Digger);
 	const auto Base = a_BlockPos - cBlockPistonHandler::MetadataToOffset(a_OldBlockMeta);
-	if (!cChunkDef::IsValidHeight(Base.y))
+	if (!cChunkDef::IsValidHeight(Base))
 	{
 		return;
 	}
diff --git a/src/Blocks/BlockVines.h b/src/Blocks/BlockVines.h
index 0ab0441a8..a23ba1489 100644
--- a/src/Blocks/BlockVines.h
+++ b/src/Blocks/BlockVines.h
@@ -199,7 +199,7 @@ private:
 
 		// Vine cannot grow down if at the bottom:
 		auto GrowPos = a_RelPos.addedY(-1);
-		if (!cChunkDef::IsValidHeight(GrowPos.y))
+		if (!cChunkDef::IsValidHeight(GrowPos))
 		{
 			return;
 		}
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index db09facd9..4bf4557d9 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -1022,7 +1022,7 @@ int cChunk::GrowPlantAt(Vector3i a_RelPos, int a_NumStages)
 
 bool cChunk::UnboundedRelGetBlock(Vector3i a_RelPos, BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1043,7 +1043,7 @@ bool cChunk::UnboundedRelGetBlock(Vector3i a_RelPos, BLOCKTYPE & a_BlockType, NI
 
 bool cChunk::UnboundedRelGetBlockType(Vector3i a_RelPos, BLOCKTYPE & a_BlockType) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1064,7 +1064,7 @@ bool cChunk::UnboundedRelGetBlockType(Vector3i a_RelPos, BLOCKTYPE & a_BlockType
 
 bool cChunk::UnboundedRelGetBlockMeta(Vector3i a_RelPos, NIBBLETYPE & a_BlockMeta) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1085,7 +1085,7 @@ bool cChunk::UnboundedRelGetBlockMeta(Vector3i a_RelPos, NIBBLETYPE & a_BlockMet
 
 bool cChunk::UnboundedRelGetBlockBlockLight(Vector3i a_RelPos, NIBBLETYPE & a_BlockBlockLight) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1106,7 +1106,7 @@ bool cChunk::UnboundedRelGetBlockBlockLight(Vector3i a_RelPos, NIBBLETYPE & a_Bl
 
 bool cChunk::UnboundedRelGetBlockSkyLight(Vector3i a_RelPos, NIBBLETYPE & a_BlockSkyLight) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1127,7 +1127,7 @@ bool cChunk::UnboundedRelGetBlockSkyLight(Vector3i a_RelPos, NIBBLETYPE & a_Bloc
 
 bool cChunk::UnboundedRelGetBlockLights(Vector3i a_RelPos, NIBBLETYPE & a_BlockLight, NIBBLETYPE & a_SkyLight) const
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1149,7 +1149,7 @@ bool cChunk::UnboundedRelGetBlockLights(Vector3i a_RelPos, NIBBLETYPE & a_BlockL
 
 bool cChunk::UnboundedRelSetBlock(Vector3i a_RelPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
@@ -1170,7 +1170,7 @@ bool cChunk::UnboundedRelSetBlock(Vector3i a_RelPos, BLOCKTYPE a_BlockType, NIBB
 
 bool cChunk::UnboundedRelFastSetBlock(Vector3i a_RelPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
 {
-	if (!cChunkDef::IsValidHeight(a_RelPos.y))
+	if (!cChunkDef::IsValidHeight(a_RelPos))
 	{
 		LOGWARNING("%s: requesting a block with a_RelY out of range: %d", __FUNCTION__, a_RelPos.y);
 		return false;
diff --git a/src/ChunkDef.h b/src/ChunkDef.h
index 2f619f83b..11ef96e81 100644
--- a/src/ChunkDef.h
+++ b/src/ChunkDef.h
@@ -164,15 +164,10 @@ public:
 	}
 
 
-	/** Validates a height-coordinate. Returns false if height-coordiante is out of height bounds */
-	inline static bool IsValidHeight(int a_Height)
-	{
-		return ((a_Height >= 0) && (a_Height < Height));
-	}
-
+	/** Validates a height-coordinate. Returns false if height-coordinate is out of height bounds */
 	inline static bool IsValidHeight(Vector3i a_BlockPosition)
 	{
-		return IsValidHeight(a_BlockPosition.y);
+		return ((a_BlockPosition.y >= 0) && (a_BlockPosition.y < Height));
 	}
 
 
@@ -188,7 +183,7 @@ public:
 	{
 		return (
 			IsValidWidth(a_RelPos.x) &&
-			IsValidHeight(a_RelPos.y) &&
+			IsValidHeight(a_RelPos) &&
 			IsValidWidth(a_RelPos.z)
 		);
 	}
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index c3139ed9c..16e8fa267 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -748,7 +748,7 @@ bool cChunkMap::GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure)
 			res = false;
 			continue;
 		}
-		if (!cChunkDef::IsValidHeight(itr->m_RelY))
+		if (!cChunkDef::IsValidHeight(itr->GetRelativePos()))
 		{
 			continue;
 		}
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index 4872cb402..15118dd2d 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -61,6 +61,8 @@ int cClientHandle::s_ClientCount = 0;
 
 float cClientHandle::FASTBREAK_PERCENTAGE;
 
+Vector3i cClientHandle::s_IllegalPosition = {0, cChunkDef::Height + 1, 0};
+
 
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -81,16 +83,16 @@ cClientHandle::cClientHandle(const AString & a_IPString, int a_ViewDistance) :
 	m_PingID(1),
 	m_BlockDigAnimStage(-1),
 	m_BlockDigAnimSpeed(0),
-	m_BlockDigAnimPos(),
+	m_BlockDigAnimPos(s_IllegalPosition),
 	m_HasStartedDigging(false),
-	m_LastDigBlockPos(),
+	m_LastDigBlockPos(s_IllegalPosition),
 	m_State(csConnected),
 	m_NumExplosionsThisTick(0),
 	m_NumBlockChangeInteractionsThisTick(0),
 	m_UniqueID(0),
 	m_HasSentPlayerChunk(false),
 	m_Locale("en_GB"),
-	m_LastPlacedSign(0, -1, 0),
+	m_LastPlacedSign(s_IllegalPosition),
 	m_ProtocolVersion(0)
 {
 	s_ClientCount++;  // Not protected by CS because clients are always constructed from the same thread
@@ -1119,16 +1121,13 @@ void cClientHandle::HandleLeftClick(Vector3i a_BlockPos, eBlockFace a_BlockFace,
 		Vector3i BlockPos = a_BlockPos;
 		AddFaceDirection(BlockPos, a_BlockFace);
 
-		if (cChunkDef::IsValidHeight(BlockPos.y) && cBlockInfo::IsClickedThrough(m_Player->GetWorld()->GetBlock(BlockPos)))
+		if (cChunkDef::IsValidHeight(BlockPos) && cBlockInfo::IsClickedThrough(m_Player->GetWorld()->GetBlock(BlockPos)))
 		{
 			a_BlockPos = BlockPos;
 		}
 
-		if (
-			(Diff(m_Player->GetPosX(), static_cast<double>(a_BlockPos.x)) > 6) ||
-			(Diff(m_Player->GetPosY(), static_cast<double>(a_BlockPos.y)) > 6) ||
-			(Diff(m_Player->GetPosZ(), static_cast<double>(a_BlockPos.z)) > 6)
-		)
+		constexpr double MaxBlockDistance = 6.0;
+		if (!cBoundingBox(m_Player->GetPosition(), MaxBlockDistance).IsInside(a_BlockPos))
 		{
 			m_Player->SendBlocksAround(a_BlockPos, 2);
 			return;
@@ -1176,11 +1175,11 @@ void cClientHandle::HandleLeftClick(Vector3i a_BlockPos, eBlockFace a_BlockFace,
 				// When bow is in off-hand / shield slot
 				if (m_Player->GetInventory().GetShieldSlot().m_ItemType == E_ITEM_BOW)
 				{
-					m_Player->GetInventory().GetShieldSlot().GetHandler().OnItemShoot(m_Player, {a_BlockPos}, a_BlockFace);
+					m_Player->GetInventory().GetShieldSlot().GetHandler().OnItemShoot(m_Player, a_BlockPos, a_BlockFace);
 				}
 				else
 				{
-					ItemHandler.OnItemShoot(m_Player, {a_BlockPos}, a_BlockFace);
+					ItemHandler.OnItemShoot(m_Player, a_BlockPos, a_BlockFace);
 				}
 			}
 			return;
@@ -1271,11 +1270,8 @@ void cClientHandle::HandleBlockDigStarted(Vector3i a_BlockPos, eBlockFace a_Bloc
 		return;
 	}
 
-	if (
-		(Diff(m_Player->GetPosX(), static_cast<double>(a_BlockPos.x)) > 6) ||
-		(Diff(m_Player->GetPosY(), static_cast<double>(a_BlockPos.y)) > 6) ||
-		(Diff(m_Player->GetPosZ(), static_cast<double>(a_BlockPos.z)) > 6)
-	)
+	constexpr double MaxBlockDistance = 6.0;
+	if (!cBoundingBox(m_Player->GetPosition(), MaxBlockDistance).IsInside(a_BlockPos))
 	{
 		m_Player->SendBlocksAround(a_BlockPos, 2);
 		return;
@@ -1309,9 +1305,9 @@ void cClientHandle::HandleBlockDigStarted(Vector3i a_BlockPos, eBlockFace a_Bloc
 
 	cWorld * World = m_Player->GetWorld();
 	cChunkInterface ChunkInterface(World->GetChunkMap());
-	cBlockHandler::For(DiggingBlock).OnDigging(ChunkInterface, *World, *m_Player, {a_BlockPos});
+	cBlockHandler::For(DiggingBlock).OnDigging(ChunkInterface, *World, *m_Player, a_BlockPos);
 
-	m_Player->GetEquippedItem().GetHandler().OnDiggingBlock(World, m_Player, m_Player->GetEquippedItem(), {a_BlockPos}, a_BlockFace);
+	m_Player->GetEquippedItem().GetHandler().OnDiggingBlock(World, m_Player, m_Player->GetEquippedItem(), a_BlockPos, a_BlockFace);
 }
 
 
@@ -1337,7 +1333,7 @@ void cClientHandle::HandleBlockDigFinished(Vector3i a_BlockPos, eBlockFace a_Blo
 
 	BLOCKTYPE DugBlock;
 	NIBBLETYPE DugMeta;
-	m_Player->GetWorld()->GetBlockTypeMeta({ a_BlockPos }, DugBlock, DugMeta);
+	m_Player->GetWorld()->GetBlockTypeMeta(a_BlockPos, DugBlock, DugMeta);
 
 	if (!m_Player->IsGameModeCreative())
 	{
@@ -1411,14 +1407,14 @@ void cClientHandle::FinishDigAnimation()
 		m_Player->GetWorld()->BroadcastBlockBreakAnimation(static_cast<UInt32>(m_UniqueID), m_LastDigBlockPos, 10, this);
 	}
 
-	m_LastDigBlockPos = {-1, -1, -1};
+	m_LastDigBlockPos = s_IllegalPosition;
 }
 
 
 
 
 
-void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, bool a_UsedMainHand)
+void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace, Vector3i a_CursorPos, bool a_UsedMainHand)
 {
 	/* This function handles three actions:
 	(1) Place a block;
@@ -1443,12 +1439,10 @@ void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace
 	// TODO: We are still consuming the items in main hand. Remove this override when the off-hand consumption is handled correctly.
 	a_UsedMainHand = true;
 
-	const Vector3i ClickedPosition(a_BlockPos);
-	const Vector3i CursorPosition(a_CursorX, a_CursorY, a_CursorZ);
 	const cItem & HeldItem = a_UsedMainHand ? m_Player->GetEquippedItem() : m_Player->GetInventory().GetShieldSlot();
 
 	// Distance from the block's center to the player's eye height.
-	const double Dist = (Vector3d(0.5, 0.5, 0.5) + ClickedPosition - m_Player->GetEyePosition()).SqrLength();
+	const double Dist = (Vector3d(0.5, 0.5, 0.5) + a_BlockPos - m_Player->GetEyePosition()).SqrLength();
 
 	// Check the reach distance:
 	// _X 2014-11-25: I've maxed at 5.26 with a Survival client and 5.78 with a Creative client in my tests
@@ -1456,21 +1450,21 @@ void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace
 	bool IsWithinReach = (Dist <= MaxDist);
 
 	FLOGD("HandleRightClick: {0}, face {1}, Cursor {2}, Hand: {3}, HeldItem: {4}; Dist: {5:.02f}",
-		ClickedPosition, a_BlockFace, CursorPosition, a_UsedMainHand, ItemToFullString(HeldItem), Dist
+		a_BlockPos, a_BlockFace, a_CursorPos, a_UsedMainHand, ItemToFullString(HeldItem), Dist
 	);
 
 	cWorld * World = m_Player->GetWorld();
 	cPluginManager * PlgMgr = cRoot::Get()->GetPluginManager();
 
 	if (
-		!PlgMgr->CallHookPlayerRightClick(*m_Player, a_BlockPos, a_BlockFace, CursorPosition) &&
+		!PlgMgr->CallHookPlayerRightClick(*m_Player, a_BlockPos, a_BlockFace, a_CursorPos) &&
 		IsWithinReach && !m_Player->IsFrozen()
 	)
 	{
 		BLOCKTYPE BlockType;
 		NIBBLETYPE BlockMeta;
 
-		if (!World->GetBlockTypeMeta(ClickedPosition, BlockType, BlockMeta))
+		if (!World->GetBlockTypeMeta(a_BlockPos, BlockType, BlockMeta))
 		{
 			return;
 		}
@@ -1484,12 +1478,12 @@ void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace
 		if (BlockUsable)
 		{
 			cChunkInterface ChunkInterface(World->GetChunkMap());
-			if (!PlgMgr->CallHookPlayerUsingBlock(*m_Player, a_BlockPos, a_BlockFace, CursorPosition, BlockType, BlockMeta))
+			if (!PlgMgr->CallHookPlayerUsingBlock(*m_Player, a_BlockPos, a_BlockFace, a_CursorPos, BlockType, BlockMeta))
 			{
 				// Use a block:
-				if (BlockHandler.OnUse(ChunkInterface, *World, *m_Player, ClickedPosition, a_BlockFace, CursorPosition))
+				if (BlockHandler.OnUse(ChunkInterface, *World, *m_Player, a_BlockPos, a_BlockFace, a_CursorPos))
 				{
-					PlgMgr->CallHookPlayerUsedBlock(*m_Player, a_BlockPos, a_BlockFace, CursorPosition, BlockType, BlockMeta);
+					PlgMgr->CallHookPlayerUsedBlock(*m_Player, a_BlockPos, a_BlockFace, a_CursorPos, BlockType, BlockMeta);
 					return;  // Block use was successful, we're done.
 				}
 
@@ -1497,7 +1491,7 @@ void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace
 				if (ItemPlaceable)
 				{
 					// Place a block:
-					ItemHandler.OnPlayerPlace(*m_Player, HeldItem, ClickedPosition, BlockType, BlockMeta, a_BlockFace, CursorPosition);
+					ItemHandler.OnPlayerPlace(*m_Player, HeldItem, a_BlockPos, BlockType, BlockMeta, a_BlockFace, a_CursorPos);
 				}
 
 				return;
@@ -1514,19 +1508,19 @@ void cClientHandle::HandleRightClick(Vector3i a_BlockPos, eBlockFace a_BlockFace
 			}
 
 			// Place a block:
-			ItemHandler.OnPlayerPlace(*m_Player, HeldItem, ClickedPosition, BlockType, BlockMeta, a_BlockFace, CursorPosition);
+			ItemHandler.OnPlayerPlace(*m_Player, HeldItem, a_BlockPos, BlockType, BlockMeta, a_BlockFace, a_CursorPos);
 			return;
 		}
 		else if (ItemUseable)
 		{
-			if (!PlgMgr->CallHookPlayerUsingItem(*m_Player, a_BlockPos, a_BlockFace, CursorPosition))
+			if (!PlgMgr->CallHookPlayerUsingItem(*m_Player, a_BlockPos, a_BlockFace, a_CursorPos))
 			{
 				// All plugins agree with using the item.
 				// Use an item in hand with a target block.
 
 				cBlockInServerPluginInterface PluginInterface(*World);
-				ItemHandler.OnItemUse(World, m_Player, PluginInterface, HeldItem, ClickedPosition, a_BlockFace);
-				PlgMgr->CallHookPlayerUsedItem(*m_Player, a_BlockPos, a_BlockFace, CursorPosition);
+				ItemHandler.OnItemUse(World, m_Player, PluginInterface, HeldItem, a_BlockPos, a_BlockFace);
+				PlgMgr->CallHookPlayerUsedItem(*m_Player, a_BlockPos, a_BlockFace, a_CursorPos);
 				return;
 			}
 		}
@@ -1609,9 +1603,8 @@ void cClientHandle::HandlePlayerLook(float a_Rotation, float a_Pitch, bool a_IsO
 
 
 
-void cClientHandle::HandlePlayerMove(double a_PosX, double a_PosY, double a_PosZ, bool a_IsOnGround)
+void cClientHandle::HandlePlayerMove(Vector3d a_Pos, bool a_IsOnGround)
 {
-	const Vector3d NewPosition(a_PosX, a_PosY, a_PosZ);
 	const Vector3d OldPosition = GetPlayer()->GetPosition();
 	const auto PreviousIsOnGround = GetPlayer()->IsOnGround();
 
@@ -1621,7 +1614,7 @@ void cClientHandle::HandlePlayerMove(double a_PosX, double a_PosY, double a_PosZ
 #endif
 
 	if (
-		(OldPosition == NewPosition) &&
+		(OldPosition == a_Pos) &&
 		(PreviousIsOnGround == a_IsOnGround)
 	)
 	{
@@ -1641,14 +1634,14 @@ void cClientHandle::HandlePlayerMove(double a_PosX, double a_PosY, double a_PosZ
 	}
 
 	// If the player has moved too far, "repair" them:
-	if ((OldPosition - NewPosition).SqrLength() > 100 * 100)
+	if ((OldPosition - a_Pos).SqrLength() > 100 * 100)
 	{
-		LOGD("Too far away (%0.2f), \"repairing\" the client", (OldPosition - NewPosition).Length());
+		LOGD("Too far away (%0.2f), \"repairing\" the client", (OldPosition - a_Pos).Length());
 		SendPlayerMoveLook();
 		return;
 	}
 
-	if (cRoot::Get()->GetPluginManager()->CallHookPlayerMoving(*m_Player, OldPosition, NewPosition, PreviousIsOnGround))
+	if (cRoot::Get()->GetPluginManager()->CallHookPlayerMoving(*m_Player, OldPosition, a_Pos, PreviousIsOnGround))
 	{
 		SendPlayerMoveLook();
 		return;
@@ -1657,18 +1650,18 @@ void cClientHandle::HandlePlayerMove(double a_PosX, double a_PosY, double a_PosZ
 	// TODO: should do some checks to see if player is not moving through terrain
 	// TODO: Official server refuses position packets too far away from each other, kicking "hacked" clients; we should, too
 
-	m_Player->SetPosition(NewPosition);
+	m_Player->SetPosition(a_Pos);
 	m_Player->SetTouchGround(a_IsOnGround);
-	m_Player->UpdateMovementStats(NewPosition - OldPosition, PreviousIsOnGround);
+	m_Player->UpdateMovementStats(a_Pos - OldPosition, PreviousIsOnGround);
 }
 
 
 
 
 
-void cClientHandle::HandlePlayerMoveLook(double a_PosX, double a_PosY, double a_PosZ, float a_Rotation, float a_Pitch, bool a_IsOnGround)
+void cClientHandle::HandlePlayerMoveLook(Vector3d a_Pos, float a_Rotation, float a_Pitch, bool a_IsOnGround)
 {
-	HandlePlayerMove(a_PosX, a_PosY, a_PosZ, a_IsOnGround);
+	HandlePlayerMove(a_Pos, a_IsOnGround);
 	HandlePlayerLook(a_Rotation, a_Pitch, a_IsOnGround);
 }
 
@@ -1768,7 +1761,7 @@ void cClientHandle::HandleUpdateSign(
 	const AString & a_Line3, const AString & a_Line4
 )
 {
-	if (m_LastPlacedSign.Equals(Vector3i(a_BlockPos)))
+	if (m_LastPlacedSign.Equals(a_BlockPos))
 	{
 		m_LastPlacedSign.Set(0, -1, 0);
 		m_Player->GetWorld()->SetSignLines(a_BlockPos, a_Line1, a_Line2, a_Line3, a_Line4, m_Player);
@@ -1865,7 +1858,10 @@ void cClientHandle::HandleUseItem(bool a_UsedMainHand)
 
 	LOGD("HandleUseItem: Hand: %d; HeldItem: %s", a_UsedMainHand, ItemToFullString(HeldItem).c_str());
 
-	if (PlgMgr->CallHookPlayerRightClick(*m_Player, {-1, 255, -1}, BLOCK_FACE_NONE, {0, 0, 0}))
+	constexpr Vector3i DefaultBlockPos(-1, 255, -1);
+	constexpr Vector3i DefaultCursorPos(0, 0, 0);
+
+	if (PlgMgr->CallHookPlayerRightClick(*m_Player, DefaultBlockPos, BLOCK_FACE_NONE, DefaultCursorPos))
 	{
 		return;  // Plugin denied click action
 	}
@@ -1897,12 +1893,12 @@ void cClientHandle::HandleUseItem(bool a_UsedMainHand)
 	else
 	{
 		// Use an item in hand without a target block
-		if (!PlgMgr->CallHookPlayerUsingItem(*m_Player, {-1, 255, -1}, BLOCK_FACE_NONE, {0, 0, 0}))
+		if (!PlgMgr->CallHookPlayerUsingItem(*m_Player, DefaultBlockPos, BLOCK_FACE_NONE, DefaultCursorPos))
 		{
 			// All plugins agree with using the item
 			cBlockInServerPluginInterface PluginInterface(*World);
-			ItemHandler.OnItemUse(World, m_Player, PluginInterface, HeldItem, {-1, 255, -1}, BLOCK_FACE_NONE);
-			PlgMgr->CallHookPlayerUsedItem(*m_Player, {-1, 255, -1}, BLOCK_FACE_NONE, {0, 0, 0});
+			ItemHandler.OnItemUse(World, m_Player, PluginInterface, HeldItem, DefaultBlockPos, BLOCK_FACE_NONE);
+			PlgMgr->CallHookPlayerUsedItem(*m_Player, DefaultBlockPos, BLOCK_FACE_NONE, DefaultCursorPos);
 		}
 	}
 }
@@ -2687,13 +2683,13 @@ void cClientHandle::SendExplosion(const Vector3f a_Position, const float a_Power
 	auto ParticleCount = std::min(static_cast<int>(ParticleFormula * 125), 600);
 
 	// Dark smoke particles:
-	SendParticleEffect("largesmoke", a_Position, Vector3f(), Spread, static_cast<int>(ParticleCount));
+	SendParticleEffect("largesmoke", a_Position, {0.f, 0.f, 0.f,}, Spread, static_cast<int>(ParticleCount));
 
 	Spread = ParticleFormula * 0.35f;
 	ParticleCount = std::min(static_cast<int>(ParticleFormula * 550), 1800);
 
 	// Light smoke particles:
-	SendParticleEffect("explode", a_Position, Vector3f(), Spread, static_cast<int>(ParticleCount));
+	SendParticleEffect("explode", a_Position, {0.f, 0.f, 0.f,}, Spread, static_cast<int>(ParticleCount));
 
 	// Shockwave effect:
 	m_Protocol->SendExplosion(a_Position, a_Power);
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index 927f0bfc8..66ae7f20e 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -370,14 +370,14 @@ public:  // tolua_export
 	/** Verifies and sets player position, performing relevant checks.
 	Calls relevant methods to process movement related statistics.
 	Requires state of previous position and on-ground status, so must be called when these are still intact. */
-	void HandlePlayerMove(double a_PosX, double a_PosY, double a_PosZ, bool a_IsOnGround);
+	void HandlePlayerMove(Vector3d a_Pos, bool a_IsOnGround);
 
-	void HandlePlayerMoveLook(double a_PosX, double a_PosY, double a_PosZ, float a_Rotation, float a_Pitch, bool a_IsOnGround);
+	void HandlePlayerMoveLook(Vector3d a_Pos, float a_Rotation, float a_Pitch, bool a_IsOnGround);
 
 
 	void HandlePluginMessage    (const AString & a_Channel, ContiguousByteBufferView a_Message);
 	void HandleRespawn          (void);
-	void HandleRightClick       (Vector3i a_BlockPos, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, bool a_UsedMainHand);
+	void HandleRightClick       (Vector3i a_BlockPos, eBlockFace a_BlockFace, Vector3i a_Cursor, bool a_UsedMainHand);
 	void HandleSlotSelected     (Int16 a_SlotNum);
 	void HandleSpectate         (const cUUID & a_PlayerUUID);
 
@@ -540,6 +540,8 @@ private:
 
 	static int s_ClientCount;
 
+	static Vector3i s_IllegalPosition;
+
 	/** ID used for identification during authenticating. Assigned sequentially for each new instance. */
 	int m_UniqueID;
 
diff --git a/src/Entities/EnderCrystal.cpp b/src/Entities/EnderCrystal.cpp
index 07fd56dad..c356caa70 100644
--- a/src/Entities/EnderCrystal.cpp
+++ b/src/Entities/EnderCrystal.cpp
@@ -95,7 +95,7 @@ void cEnderCrystal::KilledBy(TakeDamageInfo & a_TDI)
 	m_World->DoExplosionAt(6.0, GetPosX(), GetPosY() + GetHeight() / 2, GetPosZ(), true, esEnderCrystal, this);
 
 	const auto Position = GetPosition().Floor();
-	if (cChunkDef::IsValidHeight(Position.y))
+	if (cChunkDef::IsValidHeight(Position))
 	{
 		m_World->SetBlock(Position, E_BLOCK_FIRE, 0);
 	}
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index 8788a8ce5..0718da06c 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -1131,7 +1131,7 @@ void cEntity::HandlePhysics(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 	}
 
 	// Get water direction
-	Vector3f WaterDir = m_World->GetWaterSimulator()->GetFlowingDirection(BlockX, BlockY, BlockZ);
+	Vector3f WaterDir = m_World->GetWaterSimulator()->GetFlowingDirection({BlockX, BlockY, BlockZ});
 
 	m_WaterSpeed *= 0.9;  // Reduce speed each tick
 
@@ -1433,7 +1433,7 @@ bool cEntity::DetectPortal()
 		return false;
 	}
 
-	if (const auto Position = m_Position.Floor(); cChunkDef::IsValidHeight(Position.y))
+	if (const auto Position = m_Position.Floor(); cChunkDef::IsValidHeight(Position))
 	{
 		switch (GetWorld()->GetBlock(Position))
 		{
diff --git a/src/Entities/Pawn.cpp b/src/Entities/Pawn.cpp
index 361450349..990ea8096 100644
--- a/src/Entities/Pawn.cpp
+++ b/src/Entities/Pawn.cpp
@@ -320,7 +320,7 @@ void cPawn::HandleFalling(void)
 	With this in mind, we first check the block at the player's feet, then the one below that (because fences),
 	and decide which behaviour we want to go with.
 	*/
-	BLOCKTYPE BlockAtFoot = (cChunkDef::IsValidHeight(POSY_TOINT)) ? GetWorld()->GetBlock(POS_TOINT) : static_cast<BLOCKTYPE>(E_BLOCK_AIR);
+	BLOCKTYPE BlockAtFoot = (cChunkDef::IsValidHeight(POS_TOINT)) ? GetWorld()->GetBlock(POS_TOINT) : static_cast<BLOCKTYPE>(E_BLOCK_AIR);
 
 	/* We initialize these with what the foot is really IN, because for sampling we will move down with the epsilon above */
 	bool IsFootInWater = IsBlockWater(BlockAtFoot);
@@ -364,7 +364,7 @@ void cPawn::HandleFalling(void)
 		{
 			Vector3i BlockTestPosition = CrossTestPosition.Floor() + BlockSampleOffsets[j];
 
-			if (!cChunkDef::IsValidHeight(BlockTestPosition.y))
+			if (!cChunkDef::IsValidHeight(BlockTestPosition))
 			{
 				continue;
 			}
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index 376f431eb..04a7f9be0 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -2192,7 +2192,7 @@ bool cPlayer::IsClimbing(void) const
 {
 	const auto Position = GetPosition().Floor();
 
-	if (!cChunkDef::IsValidHeight(Position.y))
+	if (!cChunkDef::IsValidHeight(Position))
 	{
 		return false;
 	}
@@ -2579,7 +2579,7 @@ bool cPlayer::IsInsideWater()
 {
 	const auto EyePos = GetEyePosition().Floor();
 
-	if (!cChunkDef::IsValidHeight(EyePos.y))
+	if (!cChunkDef::IsValidHeight(EyePos))
 	{
 		// Not in water if in void.
 		return false;
diff --git a/src/Generating/FinishGen.cpp b/src/Generating/FinishGen.cpp
index eafa6f804..0ce48f90c 100644
--- a/src/Generating/FinishGen.cpp
+++ b/src/Generating/FinishGen.cpp
@@ -555,7 +555,7 @@ void cFinishGenTallGrass::GenFinish(cChunkDesc & a_ChunkDesc)
 			)
 			{
 				y--;
-				if (!cChunkDef::IsValidHeight(y - 1))
+				if (!cChunkDef::IsValidHeight({x, y - 1, z}))
 				{
 					failed = true;
 					break;
@@ -1986,7 +1986,7 @@ void cFinishGenOreNests::GenerateOre(
 				for (int y = ysize; y >= 0; --y)
 				{
 					int BlockY = BaseY + y;
-					if (!cChunkDef::IsValidHeight(BlockY))
+					if (!cChunkDef::IsValidHeight({BlockX, BlockY, BaseZ}))
 					{
 						Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
 						continue;
diff --git a/src/Items/ItemBoat.h b/src/Items/ItemBoat.h
index 51f2f8803..4fc041787 100644
--- a/src/Items/ItemBoat.h
+++ b/src/Items/ItemBoat.h
@@ -70,7 +70,7 @@ public:
 
 		// Block above must be air to spawn a boat (prevents spawning a boat underwater)
 		auto PosAbove = Callbacks.m_Pos.Floor().addedY(1);
-		if (!cChunkDef::IsValidHeight(PosAbove.y))
+		if (!cChunkDef::IsValidHeight(PosAbove))
 		{
 			return false;
 		}
diff --git a/src/Items/ItemDye.h b/src/Items/ItemDye.h
index 5b0081b45..e6beca084 100644
--- a/src/Items/ItemDye.h
+++ b/src/Items/ItemDye.h
@@ -365,7 +365,7 @@ public:
 		)
 		{
 			if (
-				!cChunkDef::IsValidHeight(Position.y) ||
+				!cChunkDef::IsValidHeight(Position) ||
 				(a_World.GetBlock(Position) != E_BLOCK_GRASS)  // Are we looking at grass?
 			)
 			{
diff --git a/src/Items/ItemHandler.cpp b/src/Items/ItemHandler.cpp
index 67d4b2a43..70980b786 100644
--- a/src/Items/ItemHandler.cpp
+++ b/src/Items/ItemHandler.cpp
@@ -1063,7 +1063,7 @@ void cItemHandler::OnPlayerPlace(cPlayer & a_Player, const cItem & a_HeldItem, c
 		NIBBLETYPE PlaceMeta;
 		const auto PlacePosition = AddFaceDirection(a_ClickedPosition, a_ClickedBlockFace);
 
-		if (!cChunkDef::IsValidHeight(PlacePosition.y) || !World.GetBlockTypeMeta(PlacePosition, PlaceBlock, PlaceMeta))
+		if (!cChunkDef::IsValidHeight(PlacePosition) || !World.GetBlockTypeMeta(PlacePosition, PlaceBlock, PlaceMeta))
 		{
 			// The block is being placed outside the world, ignore this packet altogether (GH #128):
 			return;
diff --git a/src/Items/ItemLighter.h b/src/Items/ItemLighter.h
index 3e7d3e78f..2402dd0e1 100644
--- a/src/Items/ItemLighter.h
+++ b/src/Items/ItemLighter.h
@@ -57,7 +57,7 @@ public:
 		}
 
 		const auto FirePos = AddFaceDirection(a_ClickedBlockPos, a_ClickedBlockFace);
-		if (!cChunkDef::IsValidHeight(FirePos.y))
+		if (!cChunkDef::IsValidHeight(FirePos))
 		{
 			return false;
 		}
diff --git a/src/MobSpawner.cpp b/src/MobSpawner.cpp
index b66179898..3fcb20f99 100644
--- a/src/MobSpawner.cpp
+++ b/src/MobSpawner.cpp
@@ -79,7 +79,7 @@ bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, Vector3i a_RelPos, eMonsterType
 		return false;
 	}
 
-	if (cChunkDef::IsValidHeight(a_RelPos.y - 1) && (a_Chunk->GetBlock(a_RelPos.addedY(-1)) == E_BLOCK_BEDROCK))
+	if (cChunkDef::IsValidHeight(a_RelPos.addedY(-1)) && (a_Chunk->GetBlock(a_RelPos.addedY(-1)) == E_BLOCK_BEDROCK))
 	{
 		return false;   // Make sure mobs do not spawn on bedrock.
 	}
diff --git a/src/Mobs/Path.cpp b/src/Mobs/Path.cpp
index e9c4e6ca7..05ccd6c39 100644
--- a/src/Mobs/Path.cpp
+++ b/src/Mobs/Path.cpp
@@ -480,7 +480,7 @@ void cPath::FillCellAttributes(cPathCell & a_Cell)
 
 	ASSERT(m_Chunk != nullptr);
 
-	if (!cChunkDef::IsValidHeight(Location.y))
+	if (!cChunkDef::IsValidHeight(Location))
 	{
 		// Players can't build outside the game height, so it must be air
 		a_Cell.m_IsSolid = false;
diff --git a/src/Mobs/PathFinder.cpp b/src/Mobs/PathFinder.cpp
index bcc48d80e..260044f3b 100644
--- a/src/Mobs/PathFinder.cpp
+++ b/src/Mobs/PathFinder.cpp
@@ -185,74 +185,78 @@ bool cPathFinder::EnsureProperPoint(Vector3d & a_Vector, cChunk & a_Chunk)
 		return false;
 	}
 
-	int RelX = FloorC(a_Vector.x) - Chunk->GetPosX() * cChunkDef::Width;
-	int RelZ = FloorC(a_Vector.z) - Chunk->GetPosZ() * cChunkDef::Width;
-
 	// If destination in the air, first try to go 1 block north, or east, or west.
 	// This fixes the player leaning issue.
 	// If that failed, we instead go down to the lowest air block.
-	int YBelowUs = FloorC(a_Vector.y) - 1;
-	if (!cChunkDef::IsValidHeight(YBelowUs))
+	auto Below = a_Vector.Floor().addedY(-1);
+	if (!cChunkDef::IsValidHeight(Below))
 	{
 		return false;
 
 	}
-	Chunk->GetBlockTypeMeta(RelX, YBelowUs, RelZ, BlockType, BlockMeta);
+	auto BelowRel = cChunkDef::AbsoluteToRelative(Below);
+
+	Chunk->GetBlockTypeMeta(BelowRel, BlockType, BlockMeta);
 	if (!(IsWaterOrSolid(BlockType)))
 	{
+		constexpr std::array<Vector3i, 8> Offsets =
+		{
+			{
+				{-1, 0, 0},
+				{1, 0, 0},
+				{0, 0, -1},
+				{0, 0, 1},
+				{-1, 0, -1},
+				{-1, 0, 1},
+				{1, 0, -1},
+				{1, 0, 1},
+			}
+		};
+
+		// Looks for a neighbouring block one block in x or z direction that is water or solid.
 		bool InTheAir = true;
-		int x, z;
-		for (z = -1; z <= 1; ++z)
+		for (const auto & Offset : Offsets)
 		{
-			for (x = -1; x <= 1; ++x)
+			auto InspectPos = Below + Offset;
+			Chunk = a_Chunk.GetNeighborChunk(InspectPos.x, InspectPos.z);
+			if ((Chunk == nullptr) || !Chunk->IsValid())
 			{
-				if ((x == 0) && (z == 0))
-				{
-					continue;
-				}
-				Chunk = a_Chunk.GetNeighborChunk(FloorC(a_Vector.x+x), FloorC(a_Vector.z+z));
-				if ((Chunk == nullptr) || !Chunk->IsValid())
-				{
-					return false;
-				}
-				RelX = FloorC(a_Vector.x+x) - Chunk->GetPosX() * cChunkDef::Width;
-				RelZ = FloorC(a_Vector.z+z) - Chunk->GetPosZ() * cChunkDef::Width;
-				Chunk->GetBlockTypeMeta(RelX, YBelowUs, RelZ, BlockType, BlockMeta);
-				if (IsWaterOrSolid((BlockType)))
-				{
-					a_Vector.x += x;
-					a_Vector.z += z;
-					InTheAir = false;
-					goto breakBothLoops;
-				}
+				return false;
+			}
+			auto InspectRel = cChunkDef::AbsoluteToRelative(InspectPos);
+			Chunk->GetBlockTypeMeta(InspectRel, BlockType, BlockMeta);
+			if (IsWaterOrSolid((BlockType)))
+			{
+				BelowRel = InspectRel;
+				InTheAir = false;
+				break;
 			}
 		}
-		breakBothLoops:
 
 		// Go down to the lowest air block.
 		if (InTheAir)
 		{
-			while (a_Vector.y > 0)
+			while (cChunkDef::IsValidHeight(a_Vector.addedY(-1)))
 			{
-				Chunk->GetBlockTypeMeta(RelX, FloorC(a_Vector.y) - 1, RelZ, BlockType, BlockMeta);
+				Chunk->GetBlockTypeMeta(BelowRel.addedY(-1), BlockType, BlockMeta);
 				if (IsWaterOrSolid(BlockType))
 				{
 					break;
 				}
-				a_Vector.y -= 1;
+				BelowRel.y -= 1;
 			}
 		}
 	}
 
 	// If destination in water or solid, go up to the first air block.
-	while (a_Vector.y < cChunkDef::Height)
+	while (BelowRel.y < cChunkDef::Height)
 	{
-		Chunk->GetBlockTypeMeta(RelX, FloorC(a_Vector.y), RelZ, BlockType, BlockMeta);
+		Chunk->GetBlockTypeMeta(BelowRel, BlockType, BlockMeta);
 		if (!IsWaterOrSolid(BlockType))
 		{
 			break;
 		}
-		a_Vector.y += 1;
+		BelowRel.y += 1;
 	}
 
 	return true;
diff --git a/src/Physics/Explodinator.cpp b/src/Physics/Explodinator.cpp
index 7cd266c15..ba1a8cbcf 100644
--- a/src/Physics/Explodinator.cpp
+++ b/src/Physics/Explodinator.cpp
@@ -342,7 +342,7 @@ namespace Explodinator
 		while (a_Intensity > 0)
 		{
 			auto Position = Checkpoint.Floor();
-			if (!cChunkDef::IsValidHeight(Position.y))
+			if (!cChunkDef::IsValidHeight(Position))
 			{
 				break;
 			}
diff --git a/src/Protocol/Protocol_1_11.cpp b/src/Protocol/Protocol_1_11.cpp
index cde4b38e3..5a052b638 100644
--- a/src/Protocol/Protocol_1_11.cpp
+++ b/src/Protocol/Protocol_1_11.cpp
@@ -600,7 +600,7 @@ void cProtocol_1_11_0::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
 	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorY);
 	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorZ);
 
-	m_Client->HandleRightClick(Position, FaceIntToBlockFace(Face), FloorC(CursorX * 16), FloorC(CursorY * 16), FloorC(CursorZ * 16), Hand == 0);
+	m_Client->HandleRightClick(Position, FaceIntToBlockFace(Face), {FloorC(CursorX * 16), FloorC(CursorY * 16), FloorC(CursorZ * 16)}, Hand == 0);
 }
 
 
diff --git a/src/Protocol/Protocol_1_8.cpp b/src/Protocol/Protocol_1_8.cpp
index 41217ec9c..efceef082 100644
--- a/src/Protocol/Protocol_1_8.cpp
+++ b/src/Protocol/Protocol_1_8.cpp
@@ -2381,7 +2381,7 @@ void cProtocol_1_8_0::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
 	}
 	else
 	{
-		m_Client->HandleRightClick(BlockPos, blockFace, CursorX, CursorY, CursorZ, true);
+		m_Client->HandleRightClick(BlockPos, blockFace, {CursorX, CursorY, CursorZ}, true);
 	}
 }
 
@@ -2553,7 +2553,7 @@ void cProtocol_1_8_0::HandlePacketPlayerPos(cByteBuffer & a_ByteBuffer)
 	HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosZ);
 	HANDLE_READ(a_ByteBuffer, ReadBool,     bool,   IsOnGround);
 
-	m_Client->HandlePlayerMove(PosX, PosY, PosZ, IsOnGround);
+	m_Client->HandlePlayerMove({PosX, PosY, PosZ}, IsOnGround);
 }
 
 
@@ -2569,7 +2569,7 @@ void cProtocol_1_8_0::HandlePacketPlayerPosLook(cByteBuffer & a_ByteBuffer)
 	HANDLE_READ(a_ByteBuffer, ReadBEFloat,  float,  Pitch);
 	HANDLE_READ(a_ByteBuffer, ReadBool,     bool,   IsOnGround);
 
-	m_Client->HandlePlayerMoveLook(PosX, PosY, PosZ, Yaw, Pitch, IsOnGround);
+	m_Client->HandlePlayerMoveLook({PosX, PosY, PosZ}, Yaw, Pitch, IsOnGround);
 }
 
 
diff --git a/src/Protocol/Protocol_1_9.cpp b/src/Protocol/Protocol_1_9.cpp
index 5e630f457..d0a51d662 100644
--- a/src/Protocol/Protocol_1_9.cpp
+++ b/src/Protocol/Protocol_1_9.cpp
@@ -901,7 +901,7 @@ void cProtocol_1_9_0::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
 	HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, CursorY);
 	HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, CursorZ);
 
-	m_Client->HandleRightClick(Position, FaceIntToBlockFace(Face), CursorX, CursorY, CursorZ, Hand == MAIN_HAND);
+	m_Client->HandleRightClick(Position, FaceIntToBlockFace(Face), {CursorX, CursorY, CursorZ}, Hand == MAIN_HAND);
 }
 
 
@@ -1003,7 +1003,7 @@ void cProtocol_1_9_0::HandlePacketPlayerPos(cByteBuffer & a_ByteBuffer)
 
 	if (m_IsTeleportIdConfirmed)
 	{
-		m_Client->HandlePlayerMove(PosX, PosY, PosZ, IsOnGround);
+		m_Client->HandlePlayerMove({PosX, PosY, PosZ}, IsOnGround);
 	}
 }
 
@@ -1022,7 +1022,7 @@ void cProtocol_1_9_0::HandlePacketPlayerPosLook(cByteBuffer & a_ByteBuffer)
 
 	if (m_IsTeleportIdConfirmed)
 	{
-		m_Client->HandlePlayerMoveLook(PosX, PosY, PosZ, Yaw, Pitch, IsOnGround);
+		m_Client->HandlePlayerMoveLook({PosX, PosY, PosZ}, Yaw, Pitch, IsOnGround);
 	}
 }
 
diff --git a/src/Simulator/DelayedFluidSimulator.cpp b/src/Simulator/DelayedFluidSimulator.cpp
index 59f76a7f8..b7f7c890c 100644
--- a/src/Simulator/DelayedFluidSimulator.cpp
+++ b/src/Simulator/DelayedFluidSimulator.cpp
@@ -145,7 +145,7 @@ void cDelayedFluidSimulator::AddBlock(cChunk & a_Chunk, Vector3i a_Position, BLO
 
 void cDelayedFluidSimulator::WakeUp(cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_Block)
 {
-	if (!cChunkDef::IsValidHeight(a_Position.y))
+	if (!cChunkDef::IsValidHeight(a_Position))
 	{
 		// Not inside the world (may happen when rclk with a full bucket - the client sends Y = -1)
 		return;
diff --git a/src/Simulator/FluidSimulator.cpp b/src/Simulator/FluidSimulator.cpp
index 0c4dc791d..968b8bd6e 100644
--- a/src/Simulator/FluidSimulator.cpp
+++ b/src/Simulator/FluidSimulator.cpp
@@ -130,14 +130,14 @@ bool cFluidSimulator::IsHigherMeta(NIBBLETYPE a_Meta1, NIBBLETYPE a_Meta2)
 
 
 
-Vector3f cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z)
+Vector3f cFluidSimulator::GetFlowingDirection(Vector3i a_Pos)
 {
-	if (!cChunkDef::IsValidHeight(a_Y))
+	if (!cChunkDef::IsValidHeight(a_Pos))
 	{
 		return {};
 	}
 
-	if (!IsAllowedBlock(m_World.GetBlock({ a_X, a_Y, a_Z })))  // No Fluid -> No Flowing direction :D
+	if (!IsAllowedBlock(m_World.GetBlock(a_Pos)))  // No Fluid -> No Flowing direction :D
 	{
 		return {};
 	}
@@ -148,24 +148,24 @@ Vector3f cFluidSimulator::GetFlowingDirection(int a_X, int a_Y, int a_Z)
 			return ((a_BlockMeta & 0x08) != 0) ? 0 : a_BlockMeta;
 		};
 
-	auto BlockMeta = m_World.GetBlockMeta({ a_X, a_Y, a_Z });
+	auto BlockMeta = m_World.GetBlockMeta(a_Pos);
 	NIBBLETYPE CentralPoint = HeightFromMeta(BlockMeta);
 	NIBBLETYPE LevelPoint[4];
 
 	// blocks around the checking pos
-	Vector3i Points[]
+	std::array<Vector3i, 4> Offsets {
 	{
-		{ a_X + 1, a_Y, a_Z },
-		{ a_X, a_Y, a_Z + 1 },
-		{ a_X - 1, a_Y, a_Z },
-		{ a_X, a_Y, a_Z - 1 }
-	};
+		{ 1, 0, 0 },
+		{ 0, 0, 1 },
+		{ 1, 0, 0 },
+		{ 0, 0, 1 }
+	}};
 
-	for (size_t i = 0; i < ARRAYCOUNT(LevelPoint); i++)
+	for (size_t i = 0; i < Offsets.size(); i++)
 	{
-		if (IsAllowedBlock(m_World.GetBlock(Points[i])))
+		if (IsAllowedBlock(m_World.GetBlock(a_Pos + Offsets[i])))
 		{
-			LevelPoint[i] = HeightFromMeta(m_World.GetBlockMeta(Points[i]));
+			LevelPoint[i] = HeightFromMeta(m_World.GetBlockMeta(Offsets[i]));
 		}
 		else
 		{
diff --git a/src/Simulator/FluidSimulator.h b/src/Simulator/FluidSimulator.h
index 2dc499375..3aa6deb8a 100644
--- a/src/Simulator/FluidSimulator.h
+++ b/src/Simulator/FluidSimulator.h
@@ -44,7 +44,7 @@ public:
 	cFluidSimulator(cWorld & a_World, BLOCKTYPE a_Fluid, BLOCKTYPE a_StationaryFluid);
 
 	/** Returns a unit vector in the direction the fluid is flowing or a zero-vector if not flowing. */
-	virtual Vector3f GetFlowingDirection(int a_X, int a_Y, int a_Z);
+	virtual Vector3f GetFlowingDirection(Vector3i a_Pos);
 
 	/** Creates a ChunkData object for the simulator to use. The simulator returns the correct object type. */
 	virtual cFluidSimulatorData * CreateChunkData(void) = 0;
diff --git a/src/Simulator/IncrementalRedstoneSimulator/ForEachSourceCallback.cpp b/src/Simulator/IncrementalRedstoneSimulator/ForEachSourceCallback.cpp
index e8a8515eb..9c7560a6c 100644
--- a/src/Simulator/IncrementalRedstoneSimulator/ForEachSourceCallback.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator/ForEachSourceCallback.cpp
@@ -26,7 +26,7 @@ ForEachSourceCallback::ForEachSourceCallback(const cChunk & Chunk, const Vector3
 
 void ForEachSourceCallback::operator()(Vector3i Location)
 {
-	if (!cChunkDef::IsValidHeight(Location.y))
+	if (!cChunkDef::IsValidHeight(Location))
 	{
 		return;
 	}
@@ -96,7 +96,7 @@ PowerLevel ForEachSourceCallback::QueryLinkedPower(const cChunk & Chunk, const V
 	for (const auto & Offset : cSimulator::GetLinkedOffsets(SolidBlockPosition - QueryPosition))
 	{
 		auto SourcePosition = QueryPosition + Offset;
-		if (!cChunkDef::IsValidHeight(SourcePosition.y))
+		if (!cChunkDef::IsValidHeight(SourcePosition))
 		{
 			continue;
 		}
diff --git a/src/Simulator/IncrementalRedstoneSimulator/IncrementalRedstoneSimulator.cpp b/src/Simulator/IncrementalRedstoneSimulator/IncrementalRedstoneSimulator.cpp
index c27f6d04d..c23af9f75 100644
--- a/src/Simulator/IncrementalRedstoneSimulator/IncrementalRedstoneSimulator.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator/IncrementalRedstoneSimulator.cpp
@@ -217,7 +217,7 @@ void cIncrementalRedstoneSimulator::WakeUp(cChunk & a_Chunk, Vector3i a_Position
 	for (const auto & Offset : cSimulator::GetLinkedOffsets(a_Offset))
 	{
 		auto Relative = a_Position - a_Offset + Offset;
-		if (!cChunkDef::IsValidHeight(Relative.y))
+		if (!cChunkDef::IsValidHeight(Relative))
 		{
 			continue;
 		}
diff --git a/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h b/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h
index cfdecb246..5f2026842 100644
--- a/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h
+++ b/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h
@@ -313,7 +313,7 @@ namespace RedstoneWireHandler
 					const auto YMDiagonalPosition = Relative + OffsetYM;
 					if (
 						BLOCKTYPE QueryBlock;
-						cChunkDef::IsValidHeight(YMDiagonalPosition.y) &&
+						cChunkDef::IsValidHeight(YMDiagonalPosition) &&
 						a_Chunk.UnboundedRelGetBlockType(YMDiagonalPosition, QueryBlock) &&
 						(QueryBlock == E_BLOCK_REDSTONE_WIRE)
 					)
diff --git a/src/Simulator/SimulatorManager.cpp b/src/Simulator/SimulatorManager.cpp
index 8af56c791..321035de5 100644
--- a/src/Simulator/SimulatorManager.cpp
+++ b/src/Simulator/SimulatorManager.cpp
@@ -71,7 +71,7 @@ void cSimulatorManager::WakeUp(cChunk & a_Chunk, Vector3i a_Position)
 	for (const auto & Offset : cSimulator::AdjacentOffsets)
 	{
 		auto Relative = a_Position + Offset;
-		if (!cChunkDef::IsValidHeight(Relative.y))
+		if (!cChunkDef::IsValidHeight(Relative))
 		{
 			continue;
 		}
diff --git a/src/World.cpp b/src/World.cpp
index d0cca09db..77230e5b8 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -850,42 +850,37 @@ bool cWorld::CanSpawnAt(int a_X, int & a_Y, int a_Z)
 
 
 
-bool cWorld::CheckPlayerSpawnPoint(int a_PosX, int a_PosY, int a_PosZ)
+bool cWorld::CheckPlayerSpawnPoint(Vector3i a_Pos)
 {
 	// Check height bounds
-	if (!cChunkDef::IsValidHeight(a_PosY))
+	if (!cChunkDef::IsValidHeight(a_Pos))
 	{
 		return false;
 	}
 
 	// Check that surrounding blocks are neither solid or liquid
-	static const Vector3i SurroundingCoords[] =
-	{
-		Vector3i(0,  0,  1),
-		Vector3i(1,  0,  1),
-		Vector3i(1,  0,  0),
-		Vector3i(1,  0, -1),
-		Vector3i(0,  0, -1),
-		Vector3i(-1, 0, -1),
-		Vector3i(-1, 0,  0),
-		Vector3i(-1, 0,  1),
-	};
-
-	static const int SurroundingCoordsCount = ARRAYCOUNT(SurroundingCoords);
-
-	for (int CoordIndex = 0; CoordIndex < SurroundingCoordsCount; ++CoordIndex)
-	{
-		const int XPos = a_PosX + SurroundingCoords[CoordIndex].x;
-		const int ZPos = a_PosZ + SurroundingCoords[CoordIndex].z;
-
-		const BLOCKTYPE BlockType = GetBlock({ XPos, a_PosY, ZPos });
+	constexpr std::array<Vector3i, 8> SurroundingCoords =
+	{{
+		{0,  0,  1},
+		{1,  0,  1},
+		{1,  0,  0},
+		{1,  0, -1},
+		{0,  0, -1},
+		{-1, 0, -1},
+		{-1, 0,  0},
+		{-1, 0,  1},
+	}};
+
+	for (const auto & Offset : SurroundingCoords)
+	{
+		const BLOCKTYPE BlockType = GetBlock(a_Pos + Offset);
 		if (cBlockInfo::IsSolid(BlockType) || IsBlockLiquid(BlockType))
 		{
-			return false;
+			return true;
 		}
 	}
 
-	return true;
+	return false;
 }
 
 
diff --git a/src/World.h b/src/World.h
index a8a6e1b14..8f37d59df 100644
--- a/src/World.h
+++ b/src/World.h
@@ -311,12 +311,7 @@ public:
 	void ChunkLoadFailed(int a_ChunkX, int a_ChunkZ);
 
 	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be nullptr. Returns true if sign text changed. */
-	bool SetSignLines(Vector3i a_BlockPos, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);
-	bool SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr)  // Exported in ManualBindings.cpp
-	{
-		return SetSignLines({a_BlockX, a_BlockY, a_BlockZ}, a_Line1, a_Line2, a_Line3, a_Line4, a_Player);
-	}
-
+	bool SetSignLines(Vector3i a_BlockPos, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = nullptr);  // Exported in ManualBindings.cpp
 
 	/** Sets the command block command. Returns true if command changed. */
 	bool SetCommandBlockCommand(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Command);  // tolua_export
@@ -1137,7 +1132,11 @@ private:
 	bool CanSpawnAt(int a_X, int & a_Y, int a_Z);
 
 	/** Check if player starting point is acceptable */
-	bool CheckPlayerSpawnPoint(int a_PosX, int a_PosY, int a_PosZ);
+	bool CheckPlayerSpawnPoint(int a_PosX, int a_PosY, int a_PosZ)
+	{
+		return CheckPlayerSpawnPoint({a_PosX, a_PosY, a_PosZ});
+	}
+	bool CheckPlayerSpawnPoint(Vector3i a_Pos);
 
 	/** Chooses a reasonable transition from the current weather to a new weather */
 	eWeather ChooseNewWeather(void);