1 files changed, 226 insertions, 81 deletions

diff --git a/src/Blocks/BlockRail.h b/src/Blocks/BlockRail.h
index 55cadfa48..ad78d290a 100644
--- a/src/Blocks/BlockRail.h
+++ b/src/Blocks/BlockRail.h
@@ -2,7 +2,6 @@
 #pragma once
 
 #include "BlockEntity.h"
-#include "../World.h"
 
 
 
@@ -31,58 +30,58 @@ public:
 	}
 	
 	virtual bool GetPlacementBlockTypeMeta(
-		cWorld * a_World, cPlayer * a_Player,
-		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, 
+		cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, 
 		int a_CursorX, int a_CursorY, int a_CursorZ,
 		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
 	) override
 	{
 		a_BlockType = m_BlockType;
-		a_BlockMeta = FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ);
+		a_BlockMeta = FindMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ);
 		return true;
 	}
 
 
-	virtual void OnPlaced(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override
+	virtual void OnPlaced(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override
 	{
-		super::OnPlaced(a_World, a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta);
+		super::OnPlaced(a_ChunkInterface, a_WorldInterface, a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta);
 
 		// Alert diagonal rails
-		OnNeighborChanged(a_World, a_BlockX + 1, a_BlockY + 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX - 1, a_BlockY + 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY + 1, a_BlockZ + 1);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY + 1, a_BlockZ - 1);
-
-		OnNeighborChanged(a_World, a_BlockX + 1, a_BlockY - 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX - 1, a_BlockY - 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY - 1, a_BlockZ + 1);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY - 1, a_BlockZ - 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX + 1, a_BlockY + 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX - 1, a_BlockY + 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ + 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ - 1);
+
+		OnNeighborChanged(a_ChunkInterface, a_BlockX + 1, a_BlockY - 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX - 1, a_BlockY - 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ + 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ - 1);
 	}
 
 
-	virtual void OnDestroyed(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ) override
+	virtual void OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ) override
 	{
-		super::OnDestroyed(a_World, a_BlockX, a_BlockY, a_BlockZ);
+		super::OnDestroyed(a_ChunkInterface, a_WorldInterface, a_BlockX, a_BlockY, a_BlockZ);
 
 		// Alert diagonal rails
-		OnNeighborChanged(a_World, a_BlockX + 1, a_BlockY + 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX - 1, a_BlockY + 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY + 1, a_BlockZ + 1);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY + 1, a_BlockZ - 1);
-
-		OnNeighborChanged(a_World, a_BlockX + 1, a_BlockY - 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX - 1, a_BlockY - 1, a_BlockZ);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY - 1, a_BlockZ + 1);
-		OnNeighborChanged(a_World, a_BlockX, a_BlockY - 1, a_BlockZ - 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX + 1, a_BlockY + 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX - 1, a_BlockY + 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ + 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ - 1);
+
+		OnNeighborChanged(a_ChunkInterface, a_BlockX + 1, a_BlockY - 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX - 1, a_BlockY - 1, a_BlockZ);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ + 1);
+		OnNeighborChanged(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ - 1);
 	}
 
 
-	virtual void OnNeighborChanged(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ) override
+	virtual void OnNeighborChanged(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ) override
 	{
-		NIBBLETYPE Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
-		if (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ) && (Meta != FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ)))
+		NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+		if (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ) && (Meta != FindMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ)))
 		{
-			a_World->FastSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, FindMeta(a_World, a_BlockX, a_BlockY, a_BlockZ));
+			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, FindMeta(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ));
 		}
 	}
 
@@ -93,13 +92,13 @@ public:
 	}
 
 
-	virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
+	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
 		if (a_RelY <= 0)
 		{
 			return false;
 		}
-		if (!g_BlockIsSolid[a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)])
+		if (!cBlockInfo::IsSolid(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)))
 		{
 			return false;
 		}
@@ -131,33 +130,33 @@ public:
 					// Too close to the edge, cannot simulate
 					return true;
 				}
-				return g_BlockIsSolid[BlockType];
+				return cBlockInfo::IsSolid(BlockType);
 			}
 		}
 		return true;
 	}
 
-	NIBBLETYPE FindMeta(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+	NIBBLETYPE FindMeta(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
 		NIBBLETYPE Meta = 0;
 		char RailsCnt = 0;
 		bool Neighbors[8]; // 0 - EAST, 1 - WEST, 2 - NORTH, 3 - SOUTH, 4 - EAST UP, 5 - WEST UP, 6 - NORTH UP, 7 - SOUTH UP
 		memset(Neighbors, false, sizeof(Neighbors));
-		Neighbors[0] = (IsUnstable(a_World, a_BlockX + 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN));
-		Neighbors[1] = (IsUnstable(a_World, a_BlockX - 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN));
-		Neighbors[2] = (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN));
-		Neighbors[3] = (IsUnstable(a_World, a_BlockX, a_BlockY, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN));
-		Neighbors[4] = (IsUnstable(a_World, a_BlockX + 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST, E_PURE_NONE));
-		Neighbors[5] = (IsUnstable(a_World, a_BlockX - 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST, E_PURE_NONE));
-		Neighbors[6] = (IsUnstable(a_World, a_BlockX, a_BlockY + 1, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_NONE));
-		Neighbors[7] = (IsUnstable(a_World, a_BlockX, a_BlockY + 1, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_NONE));
-		if (IsUnstable(a_World, a_BlockX + 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_EAST))
+		Neighbors[0] = (IsUnstable(a_ChunkInterface, a_BlockX + 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN));
+		Neighbors[1] = (IsUnstable(a_ChunkInterface, a_BlockX - 1, a_BlockY, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN));
+		Neighbors[2] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ - 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN));
+		Neighbors[3] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ + 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN));
+		Neighbors[4] = (IsUnstable(a_ChunkInterface, a_BlockX + 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST, E_PURE_NONE));
+		Neighbors[5] = (IsUnstable(a_ChunkInterface, a_BlockX - 1, a_BlockY + 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST, E_PURE_NONE));
+		Neighbors[6] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ - 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_NONE));
+		Neighbors[7] = (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ + 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_NONE));
+		if (IsUnstable(a_ChunkInterface, a_BlockX + 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_EAST))
 			Neighbors[0] = true;
-		if (IsUnstable(a_World, a_BlockX - 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_WEST))
+		if (IsUnstable(a_ChunkInterface, a_BlockX - 1, a_BlockY - 1, a_BlockZ) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_WEST))
 			Neighbors[1] = true;
-		if (IsUnstable(a_World, a_BlockX, a_BlockY - 1, a_BlockZ - 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_NORTH))
+		if (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ - 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_NORTH))
 			Neighbors[2] = true;
-		if (IsUnstable(a_World, a_BlockX, a_BlockY - 1, a_BlockZ + 1) || !IsNotConnected(a_World, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_SOUTH))
+		if (IsUnstable(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ + 1) || !IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY - 1, a_BlockZ, BLOCK_FACE_SOUTH))
 			Neighbors[3] = true;
 		for (int i = 0; i < 8; i++)
 		{
@@ -186,36 +185,46 @@ public:
 		}
 		if (RailsCnt > 1)
 		{
-			if      (Neighbors[3] && Neighbors[0]) return E_META_RAIL_CURVED_ZP_XP;
-			else if (Neighbors[3] && Neighbors[1]) return E_META_RAIL_CURVED_ZP_XM;
-			else if (Neighbors[2] && Neighbors[0]) return E_META_RAIL_CURVED_ZM_XP;
-			else if (Neighbors[2] && Neighbors[1]) return E_META_RAIL_CURVED_ZM_XM;
+			if      (Neighbors[3] && Neighbors[0] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZP_XP;
+			else if (Neighbors[3] && Neighbors[1] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZP_XM;
+			else if (Neighbors[2] && Neighbors[0] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZM_XP;
+			else if (Neighbors[2] && Neighbors[1] && CanThisRailCurve()) return E_META_RAIL_CURVED_ZM_XM;
 			else if (Neighbors[7] && Neighbors[2]) return E_META_RAIL_ASCEND_ZP;
 			else if (Neighbors[3] && Neighbors[6]) return E_META_RAIL_ASCEND_ZM;
 			else if (Neighbors[5] && Neighbors[0]) return E_META_RAIL_ASCEND_XM;
 			else if (Neighbors[4] && Neighbors[1]) return E_META_RAIL_ASCEND_XP;
 			else if (Neighbors[0] && Neighbors[1]) return E_META_RAIL_XM_XP;
 			else if (Neighbors[2] && Neighbors[3]) return E_META_RAIL_ZM_ZP;
-			ASSERT(!"Weird neighbor count");
+
+			if (CanThisRailCurve())
+			{
+				ASSERT(!"Weird neighbor count");
+			}
 		}
 		return Meta;
 	}
 
 
-	bool IsUnstable(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+	inline bool CanThisRailCurve(void)
+	{
+		return m_BlockType == E_BLOCK_RAIL;
+	}
+
+
+	bool IsUnstable(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
 	{
-		if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_RAIL)
+		if (!IsBlockRail(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ)))
 		{
 			return false;
 		}
-		NIBBLETYPE Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+		NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
 		switch (Meta)
 		{
 			case E_META_RAIL_ZM_ZP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH, E_PURE_DOWN) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH, E_PURE_DOWN)
 				)
 				{
 					return true;
@@ -226,8 +235,8 @@ public:
 			case E_META_RAIL_XM_XP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST, E_PURE_DOWN) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST, E_PURE_DOWN)
 				)
 				{
 					return true;
@@ -238,8 +247,8 @@ public:
 			case E_META_RAIL_ASCEND_XP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_EAST) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
 				)
 				{
 					return true;
@@ -250,8 +259,8 @@ public:
 			case E_META_RAIL_ASCEND_XM:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_WEST)
 				)
 				{
 					return true;
@@ -262,8 +271,8 @@ public:
 			case E_META_RAIL_ASCEND_ZM:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_NORTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH)
 				)
 				{
 					return true;
@@ -274,8 +283,8 @@ public:
 			case E_META_RAIL_ASCEND_ZP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY + 1, a_BlockZ, BLOCK_FACE_SOUTH)
 				)
 				{
 					return true;
@@ -286,8 +295,8 @@ public:
 			case E_META_RAIL_CURVED_ZP_XP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
 				)
 				{
 					return true;
@@ -298,8 +307,8 @@ public:
 			case E_META_RAIL_CURVED_ZP_XM:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_SOUTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
 				)
 				{
 					return true;
@@ -310,8 +319,8 @@ public:
 			case E_META_RAIL_CURVED_ZM_XM:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_WEST)
 				)
 				{
 					return true;
@@ -322,8 +331,8 @@ public:
 			case E_META_RAIL_CURVED_ZM_XP:
 			{
 				if (
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
-					IsNotConnected(a_World, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NORTH) || 
+					IsNotConnected(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_EAST)
 				)
 				{
 					return true;
@@ -335,31 +344,31 @@ public:
 	}
 
 
-	bool IsNotConnected(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Pure = 0)
+	bool IsNotConnected(cChunkInterface  & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, char a_Pure = 0)
 	{
 		AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, false);
 		NIBBLETYPE Meta;
-		if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_RAIL)
+		if (!IsBlockRail(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ)))
 		{
-			if ((a_World->GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ) != E_BLOCK_RAIL) || (a_Pure != E_PURE_UPDOWN))
+			if (!IsBlockRail(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ)) || (a_Pure != E_PURE_UPDOWN))
 			{
-				if ((a_World->GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ) != E_BLOCK_RAIL) || (a_Pure == E_PURE_NONE))
+				if (!IsBlockRail(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)) || (a_Pure == E_PURE_NONE))
 				{
 					return true;
 				}
 				else
 				{
-					Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY - 1, a_BlockZ);
+					Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY - 1, a_BlockZ);
 				}
 			}
 			else
 			{
-				Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY + 1, a_BlockZ);
+				Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY + 1, a_BlockZ);
 			}
 		}
 		else
 		{
-			Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+			Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
 		}
 		
 		switch (a_BlockFace)
@@ -422,9 +431,145 @@ public:
 				}
 				break;
 			}
+			default: break;
 		}
 		return true;
 	}
+
+
+	virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
+	{
+		// Bit 0x08 is a flag when a_Meta is in the range 0x00--0x05 and 0x0A--0x0F.
+		// Bit 0x08 specifies direction when a_Meta is in the range 0x06-0x09.
+		if ((a_Meta < 0x06) || (a_Meta > 0x09))
+		{
+			//  Save powered rail flag.
+			NIBBLETYPE OtherMeta = a_Meta & 0x08;
+			// Rotates according to table; 0x07 == 0111.
+			// Rails can either be flat (North/South) or Ascending (Asc. East)
+			switch (a_Meta & 0x07)
+			{
+				case 0x00: return 0x01 + OtherMeta;  // North/South -> East/West
+				case 0x01: return 0x00 + OtherMeta;  // East/West   -> North/South
+
+				case 0x02: return 0x04 + OtherMeta;  // Asc. East   -> Asc. North
+				case 0x04: return 0x03 + OtherMeta;  // Asc. North  -> Asc. West
+				case 0x03: return 0x05 + OtherMeta;  // Asc. West   -> Asc. South
+				case 0x05: return 0x02 + OtherMeta;  // Asc. South  -> Asc. East
+			}
+		}
+		else
+		{
+			switch (a_Meta)
+			{
+				// Corner Directions
+				case 0x06: return 0x09;  // Northwest Cnr. -> Southwest Cnr.
+				case 0x07: return 0x06;  // Northeast Cnr. -> Northwest Cnr.
+				case 0x08: return 0x07;  // Southeast Cnr. -> Northeast Cnr.
+				case 0x09: return 0x08;  // Southwest Cnr. -> Southeast Cnr.
+			}
+		}
+		// To avoid a compiler warning;
+		return a_Meta;
+	}
+
+
+	virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
+	{
+		// Bit 0x08 is a flag for value in the range 0x00--0x05 and specifies direction for values withint 0x006--0x09.
+		if ((a_Meta < 0x06) || (a_Meta > 0x09))
+		{
+			//  Save powered rail flag.
+			NIBBLETYPE OtherMeta = a_Meta & 0x08;
+			// Rotates according to table; 0x07 == 0111.
+			// Rails can either be flat (North/South) or Ascending (Asc. East)
+			switch (a_Meta & 0x07)
+			{
+				case 0x00: return 0x01 + OtherMeta;  // North/South -> East/West
+				case 0x01: return 0x00 + OtherMeta;  // East/West   -> North/South
+
+				case 0x02: return 0x05 + OtherMeta;  // Asc. East   -> Asc. South
+				case 0x05: return 0x03 + OtherMeta;  // Asc. South  -> Asc. West
+				case 0x03: return 0x04 + OtherMeta;  // Asc. West   -> Asc. North
+				case 0x04: return 0x02 + OtherMeta;  // Asc. North  -> Asc. East
+			}
+		}
+		else
+		{
+			switch (a_Meta)
+			{
+				// Corner Directions
+				case 0x06: return 0x07;  // Northwest Cnr. -> Northeast Cnr.
+				case 0x07: return 0x08;  // Northeast Cnr. -> Southeast Cnr.
+				case 0x08: return 0x09;  // Southeast Cnr. -> Southwest Cnr.
+				case 0x09: return 0x06;  // Southwest Cnr. -> Northwest Cnr.
+			}
+		}
+		// To avoid a compiler warning;
+		return a_Meta;
+	}
+
+
+	virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
+	{
+		// Bit 0x08 is a flag for value in the range 0x00--0x05 and specifies direction for values withint 0x006--0x09.
+		if ((a_Meta < 0x06) || (a_Meta > 0x09))
+		{
+			//  Save powered rail flag.
+			NIBBLETYPE OtherMeta = a_Meta & 0x08;
+			// Mirrors according to table; 0x07 == 0111.
+			// Rails can either be flat (North/South) or Ascending (Asc. East)
+			switch (a_Meta & 0x07)
+			{
+				case 0x05: return 0x04 + OtherMeta;  // Asc. South  -> Asc. North
+				case 0x04: return 0x05 + OtherMeta;  // Asc. North  -> Asc. South
+			}
+		}
+		else
+		{
+			switch (a_Meta)
+			{
+				// Corner Directions
+				case 0x06: return 0x09;  // Northwest Cnr. -> Southwest Cnr.
+				case 0x07: return 0x08;  // Northeast Cnr. -> Southeast Cnr.
+				case 0x08: return 0x07;  // Southeast Cnr. -> Northeast Cnr.
+				case 0x09: return 0x06;  // Southwest Cnr. -> Northwest Cnr.
+			}
+		}
+		// To avoid a compiler warning;
+		return a_Meta;
+	}
+
+
+	virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
+	{
+		// Bit 0x08 is a flag for value in the range 0x00--0x05 and specifies direction for values withint 0x006--0x09.
+		if ((a_Meta < 0x06) || (a_Meta > 0x09))
+		{
+			//  Save powered rail flag.
+			NIBBLETYPE OtherMeta = a_Meta & 0x08;
+			// Mirrors according to table; 0x07 == 0111.
+			// Rails can either be flat (North/South) or Ascending (Asc. East)
+			switch (a_Meta & 0x07)
+			{
+				case 0x02: return 0x03 + OtherMeta;  // Asc. East   -> Asc. West
+				case 0x03: return 0x02 + OtherMeta;  // Asc. West   -> Asc. East
+			}
+		}
+		else
+		{
+			switch (a_Meta)
+			{
+				// Corner Directions
+				case 0x06: return 0x07;  // Northwest Cnr. -> Northeast Cnr.
+				case 0x07: return 0x06;  // Northeast Cnr. -> Northwest Cnr.
+				case 0x08: return 0x09;  // Southeast Cnr. -> Southwest Cnr.
+				case 0x09: return 0x08;  // Southwest Cnr. -> Southeast Cnr.
+			}
+		}
+		// To avoid a compiler warning;
+		return a_Meta;
+	}
 } ;