9 files changed, 102 insertions, 16 deletions

diff --git a/src/Blocks/BlockDirt.h b/src/Blocks/BlockDirt.h
index 19f889372..89dfc963d 100644
--- a/src/Blocks/BlockDirt.h
+++ b/src/Blocks/BlockDirt.h
@@ -89,7 +89,7 @@ public:
 			Chunk->GetBlockTypeMeta(BlockX, BlockY + 1, BlockZ, AboveDest, AboveMeta);
 			if (cBlockInfo::GetHandler(AboveDest)->CanDirtGrowGrass(AboveMeta))
 			{
-				if (!cRoot::Get()->GetPluginManager()->CallHookBlockSpread(Chunk->GetWorld(), Chunk->GetPosX() * cChunkDef::Width + BlockX, BlockY, Chunk->GetPosZ() * cChunkDef::Width + BlockZ, ssGrassSpread))
+				if (!cRoot::Get()->GetPluginManager()->CallHookBlockSpread(*Chunk->GetWorld(), Chunk->GetPosX() * cChunkDef::Width + BlockX, BlockY, Chunk->GetPosZ() * cChunkDef::Width + BlockZ, ssGrassSpread))
 				{
 					Chunk->FastSetBlock(BlockX, BlockY, BlockZ, E_BLOCK_GRASS, 0);
 				}
diff --git a/src/Blocks/BlockHandler.cpp b/src/Blocks/BlockHandler.cpp
index 904e0a921..b6ef5dd6f 100644
--- a/src/Blocks/BlockHandler.cpp
+++ b/src/Blocks/BlockHandler.cpp
@@ -4,6 +4,7 @@
 #include "../Item.h"
 #include "../World.h"
 #include "../Chunk.h"
+#include "BlockPluginInterface.h"
 #include "BlockAnvil.h"
 #include "BlockBed.h"
 #include "BlockBigFlower.h"
@@ -82,7 +83,6 @@
 #include "BlockWorkbench.h"
 
 
-#include "BlockPluginInterface.h"
 
 
 
diff --git a/src/Blocks/BlockLever.h b/src/Blocks/BlockLever.h
index 3b63b396c..f5bedea6c 100644
--- a/src/Blocks/BlockLever.h
+++ b/src/Blocks/BlockLever.h
@@ -1,9 +1,9 @@
 #pragma once
 
 #include "BlockHandler.h"
+#include "../Chunk.h"
 #include "MetaRotator.h"
-
-
+#include "BlockSlab.h"
 
 
 class cBlockLeverHandler :
@@ -93,13 +93,35 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
-		NIBBLETYPE Meta;
-		a_Chunk.UnboundedRelGetBlockMeta(a_RelX, a_RelY, a_RelZ, Meta);
+		NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
+		
+		eBlockFace Face = BlockMetaDataToBlockFace(Meta);
+
+		AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true);
+
+		if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height -1))
+		{
+			return false;
+		}
+
+		BLOCKTYPE BlockIsOn;
+		a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockIsOn, Meta);
 
-		AddFaceDirection(a_RelX, a_RelY, a_RelZ, BlockMetaDataToBlockFace(Meta), true);
-		BLOCKTYPE BlockIsOn; a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockIsOn);
 
-		return (a_RelY > 0) && cBlockInfo::FullyOccupiesVoxel(BlockIsOn);
+		if (cBlockInfo::FullyOccupiesVoxel(BlockIsOn))
+		{
+			return true;
+		}
+		else if (cBlockSlabHandler::IsAnySlabType(BlockIsOn))
+		{
+			// Check if the slab is turned up side down
+			if (((Meta & 0x08) == 0x08) && (Face == BLOCK_FACE_TOP))
+			{
+				return true;
+			}
+		}
+
+		return false;
 	}
 
 
diff --git a/src/Blocks/BlockPluginInterface.h b/src/Blocks/BlockPluginInterface.h
index 3a36c40b1..b769bcf3e 100644
--- a/src/Blocks/BlockPluginInterface.h
+++ b/src/Blocks/BlockPluginInterface.h
@@ -1,7 +1,11 @@
 
 #pragma once
 
-/** This interface is used to decouple block handlers from the cPluginManager dependancy through cWorld.
+
+
+
+
+/** This interface is used to decouple block handlers from the cPluginManager dependency through cWorld.
 The block handlers call this interface, which is then implemented by the specific classes that
 the caller provides.
 */
@@ -10,5 +14,10 @@ class cBlockPluginInterface
 public:
 	virtual ~cBlockPluginInterface() {}
 	
+	virtual bool CallHookBlockSpread(int a_BlockX, int a_BlockY, int a_BlockZ, eSpreadSource a_Source) = 0;
 	virtual bool CallHookBlockToPickups(cEntity * a_Digger, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, cItems & a_Pickups) = 0;
 };
+
+
+
+
diff --git a/src/Blocks/BlockRedstone.h b/src/Blocks/BlockRedstone.h
index 37d61ed73..2785eb479 100644
--- a/src/Blocks/BlockRedstone.h
+++ b/src/Blocks/BlockRedstone.h
@@ -3,6 +3,7 @@
 
 #include "BlockHandler.h"
 #include "../World.h"
+#include "BlockSlab.h"
 
 
 
@@ -16,11 +17,33 @@ public:
 		: cBlockHandler(a_BlockType)
 	{
 	}
-	
+
+
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
-		return ((a_RelY > 0) && cBlockInfo::FullyOccupiesVoxel(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)));
+		if (a_RelY <= 0)
+		{
+			return false;
+		}
+
+		BLOCKTYPE BelowBlock;
+		NIBBLETYPE BelowBlockMeta;
+		a_Chunk.GetBlockTypeMeta(a_RelX, a_RelY - 1, a_RelZ, BelowBlock, BelowBlockMeta);
+
+		if (cBlockInfo::FullyOccupiesVoxel(BelowBlock))
+		{
+			return true;
+		}
+		else if (cBlockSlabHandler::IsAnySlabType(BelowBlock))
+		{
+			// Check if the slab is turned up side down
+			if ((BelowBlockMeta & 0x08) == 0x08)
+			{
+				return true;
+			}
+		}
+		return false;
 	}
 	
 	
diff --git a/src/Blocks/BlockRedstoneRepeater.h b/src/Blocks/BlockRedstoneRepeater.h
index 1eb67f714..e8262dc40 100644
--- a/src/Blocks/BlockRedstoneRepeater.h
+++ b/src/Blocks/BlockRedstoneRepeater.h
@@ -5,6 +5,7 @@
 #include "Chunk.h"
 #include "MetaRotator.h"
 #include "ChunkInterface.h"
+#include "BlockSlab.h"
 
 
 
@@ -44,6 +45,7 @@ public:
 	}
 
 
+
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
 		// Reset meta to zero
@@ -59,7 +61,28 @@ public:
 	
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
-		return ((a_RelY > 0) && cBlockInfo::IsSolid(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)));
+		if (a_RelY <= 0)
+		{
+			return false;
+		}
+
+		BLOCKTYPE BelowBlock;
+		NIBBLETYPE BelowBlockMeta;
+		a_Chunk.GetBlockTypeMeta(a_RelX, a_RelY - 1, a_RelZ, BelowBlock, BelowBlockMeta);
+
+		if (cBlockInfo::FullyOccupiesVoxel(BelowBlock))
+		{
+			return true;
+		}
+		else if (cBlockSlabHandler::IsAnySlabType(BelowBlock))
+		{
+			// Check if the slab is turned up side down
+			if ((BelowBlockMeta & 0x08) == 0x08)
+			{
+				return true;
+			}
+		}
+		return false;
 	}
 
 
diff --git a/src/Blocks/BlockSlab.h b/src/Blocks/BlockSlab.h
index ffe2414f7..d762154df 100644
--- a/src/Blocks/BlockSlab.h
+++ b/src/Blocks/BlockSlab.h
@@ -13,6 +13,7 @@
 #include "../Items/ItemHandler.h"
 #include "Root.h"
 #include "ChunkInterface.h"
+#include "../Entities/Player.h"
 
 
 
diff --git a/src/Blocks/BlockStone.h b/src/Blocks/BlockStone.h
index e52599c0f..69cc8301b 100644
--- a/src/Blocks/BlockStone.h
+++ b/src/Blocks/BlockStone.h
@@ -18,7 +18,7 @@ public:
 
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
-		if (a_BlockMeta == E_META_STONE)
+		if (a_BlockMeta == E_META_STONE_STONE)
 		{
 			a_Pickups.push_back(cItem(E_BLOCK_COBBLESTONE, 1, 0));
 			return;
diff --git a/src/Blocks/BlockVine.h b/src/Blocks/BlockVine.h
index 7aa0378c7..ff34cdf87 100644
--- a/src/Blocks/BlockVine.h
+++ b/src/Blocks/BlockVine.h
@@ -176,23 +176,31 @@ public:
 		return false;
 	}
 	
+
 	virtual void OnUpdate(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cBlockPluginInterface & a_BlockPluginInterface, cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ)
 	{
 		UNUSED(a_ChunkInterface);
 		UNUSED(a_WorldInterface);
-		UNUSED(a_BlockPluginInterface);
 
+		// Vine cannot grow down if at the bottom:
+		if (a_RelY < 1)
+		{
+			return;
+		}
+
+		// Grow one block down, if possible:
 		BLOCKTYPE Block;
 		a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY - 1, a_RelZ, Block);
 		if (Block == E_BLOCK_AIR)
 		{
-			if (!cRoot::Get()->GetPluginManager()->CallHookBlockSpread((cWorld*) &a_WorldInterface, a_RelX + a_Chunk.GetPosX() * cChunkDef::Width, a_RelY - 1, a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width, ssVineSpread))
+			if (!a_BlockPluginInterface.CallHookBlockSpread(a_RelX + a_Chunk.GetPosX() * cChunkDef::Width, a_RelY - 1, a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width, ssVineSpread))
 			{
 				a_Chunk.UnboundedRelSetBlock(a_RelX, a_RelY - 1, a_RelZ, E_BLOCK_VINES, a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ));
 			}
 		}
 	}
 	
+
 	virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
 	{
 		return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f;  // Rotate bits to the right