11 files changed, 98 insertions, 25 deletions

diff --git a/src/Blocks/BlockBigFlower.h b/src/Blocks/BlockBigFlower.h
index 3577bdd40..a73633cd0 100644
--- a/src/Blocks/BlockBigFlower.h
+++ b/src/Blocks/BlockBigFlower.h
@@ -81,7 +81,28 @@ 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) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR) && (a_RelY < cChunkDef::Height) && ((a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ) == E_BLOCK_AIR) || (a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ) == E_BLOCK_BIG_FLOWER)));
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return (cBlockInfo::FullyOccupiesVoxel(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)));
+		}
+
+		if ((a_RelY <= 0) || (a_RelY >= cChunkDef::Height))
+		{
+			return false;
+		}
+
+		NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
+		if ((Meta & 0x08) != 0)
+		{
+			// The coords are pointing at the top part of the flower
+			return (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) == m_BlockType);
+		}
+		else
+		{
+			// The coords are pointing at the bottom part of the flower
+			return IsBlockTypeOfDirt(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ));
+		}
 	}
 
 
diff --git a/src/Blocks/BlockButton.h b/src/Blocks/BlockButton.h
index 8e4f04740..63582977a 100644
--- a/src/Blocks/BlockButton.h
+++ b/src/Blocks/BlockButton.h
@@ -91,6 +91,12 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return true;
+		}
+
 		NIBBLETYPE Meta;
 		a_Chunk.UnboundedRelGetBlockMeta(a_RelX, a_RelY, a_RelZ, Meta);
 
diff --git a/src/Blocks/BlockDoor.cpp b/src/Blocks/BlockDoor.cpp
index 96345a2df..ffb72a680 100644
--- a/src/Blocks/BlockDoor.cpp
+++ b/src/Blocks/BlockDoor.cpp
@@ -20,9 +20,9 @@ void cBlockDoorHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldIn
 {
 	NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
 
-	if (OldMeta & 8)
+	if ((OldMeta & 0x08) != 0)
 	{
-		// Was upper part of door
+		// The coords are pointing at the top part of the door
 		if (IsDoor(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
 		{
 			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY - 1, a_BlockZ, E_BLOCK_AIR, 0);
@@ -30,7 +30,7 @@ void cBlockDoorHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldIn
 	}
 	else
 	{
-		// Was lower part
+		// The coords are pointing at the bottom part of the door
 		if (IsDoor(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY + 1, a_BlockZ)))
 		{
 			a_ChunkInterface.FastSetBlock(a_BlockX, a_BlockY + 1, a_BlockZ, E_BLOCK_AIR, 0);
diff --git a/src/Blocks/BlockDoor.h b/src/Blocks/BlockDoor.h
index 92ad8da12..74e608da8 100644
--- a/src/Blocks/BlockDoor.h
+++ b/src/Blocks/BlockDoor.h
@@ -117,7 +117,28 @@ 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) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR));
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return (cBlockInfo::FullyOccupiesVoxel(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ)));
+		}
+
+		if ((a_RelY <= 0) || (a_RelY >= cChunkDef::Height))
+		{
+			return false;
+		}
+
+		NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
+		if ((Meta & 0x08) != 0)
+		{
+			// The coords are pointing at the top part of the door
+			return (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) == m_BlockType);
+		}
+		else
+		{
+			// The coords are pointing at the bottom part of the door
+			return cBlockInfo::FullyOccupiesVoxel(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ));
+		}
 	}
 
 
diff --git a/src/Blocks/BlockFlowerPot.h b/src/Blocks/BlockFlowerPot.h
index fc75ef638..ff31cf4ae 100644
--- a/src/Blocks/BlockFlowerPot.h
+++ b/src/Blocks/BlockFlowerPot.h
@@ -17,10 +17,17 @@ public:
 	{
 	}
 
+
 	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
 	{
 		a_Pickups.push_back(cItem(E_ITEM_FLOWER_POT, 1, 0));
 	}
+
+
+	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)));
+	}
 } ;
 
 
diff --git a/src/Blocks/BlockLever.h b/src/Blocks/BlockLever.h
index f5bedea6c..347c8ff72 100644
--- a/src/Blocks/BlockLever.h
+++ b/src/Blocks/BlockLever.h
@@ -93,13 +93,17 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return true;
+		}
+
 		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))
+		if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height))
 		{
 			return false;
 		}
@@ -107,7 +111,6 @@ public:
 		BLOCKTYPE BlockIsOn;
 		a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockIsOn, Meta);
 
-
 		if (cBlockInfo::FullyOccupiesVoxel(BlockIsOn))
 		{
 			return true;
diff --git a/src/Blocks/BlockSnow.h b/src/Blocks/BlockSnow.h
index 7b6094c9f..4f1712974 100644
--- a/src/Blocks/BlockSnow.h
+++ b/src/Blocks/BlockSnow.h
@@ -67,19 +67,16 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
-		if (a_RelY > 0)
+		if (a_RelY <= 0)
 		{
-			BLOCKTYPE BlockBelow = a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ);
-			NIBBLETYPE MetaBelow = a_Chunk.GetMeta(a_RelX, a_RelY - 1, a_RelZ);
-			
-			if (cBlockInfo::IsSnowable(BlockBelow) || ((BlockBelow == E_BLOCK_SNOW) && (MetaBelow == 7)))
-			{
-				// If block below is snowable, or it is a thin slow block and has a meta of 7 (full thin snow block), say yay
-				return true;
-			}
+			return false;
 		}
-		
-		return false;
+
+		BLOCKTYPE BlockBelow = a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ);
+		NIBBLETYPE MetaBelow = a_Chunk.GetMeta(a_RelX, a_RelY - 1, a_RelZ);
+
+		// If block below is snowable, or it is a thin slow block and has a meta of 7 (full thin snow block), say yay
+		return (cBlockInfo::IsSnowable(BlockBelow) || ((BlockBelow == E_BLOCK_SNOW) && (MetaBelow == 7)));
 	}
 	
 	
diff --git a/src/Blocks/BlockTorch.h b/src/Blocks/BlockTorch.h
index e77bbd1b8..0218aa6ea 100644
--- a/src/Blocks/BlockTorch.h
+++ b/src/Blocks/BlockTorch.h
@@ -153,6 +153,12 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return true;
+		}
+
 		eBlockFace Face = MetaDataToDirection(a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ));
 		AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true);
 
diff --git a/src/Blocks/BlockTrapdoor.h b/src/Blocks/BlockTrapdoor.h
index 8c96de0f1..55a644288 100644
--- a/src/Blocks/BlockTrapdoor.h
+++ b/src/Blocks/BlockTrapdoor.h
@@ -100,6 +100,12 @@ public:
 
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
 	{
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return true;
+		}
+
 		NIBBLETYPE Meta;
 		a_Chunk.UnboundedRelGetBlockMeta(a_RelX, a_RelY, a_RelZ, Meta);
 
diff --git a/src/Blocks/BlockTripwireHook.h b/src/Blocks/BlockTripwireHook.h
index 88d389711..d7121f65c 100644
--- a/src/Blocks/BlockTripwireHook.h
+++ b/src/Blocks/BlockTripwireHook.h
@@ -61,14 +61,19 @@ 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);
+		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
+		{
+			// In placing
+			return true;
+		}
+
+		NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
 
 		AddFaceDirection(a_RelX, a_RelY, a_RelZ, MetadataToDirection(Meta), true);
 		BLOCKTYPE BlockIsOn;
 		a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockIsOn);
 
-		return ((a_RelY > 0) && cBlockInfo::FullyOccupiesVoxel(BlockIsOn));
+		return cBlockInfo::FullyOccupiesVoxel(BlockIsOn);
 	}
 };
 
diff --git a/src/Blocks/BlockWallSign.h b/src/Blocks/BlockWallSign.h
index 9a7d4aa58..ab280c1e0 100644
--- a/src/Blocks/BlockWallSign.h
+++ b/src/Blocks/BlockWallSign.h
@@ -42,14 +42,15 @@ public:
 	{
 		if (a_Chunk.GetBlock(a_RelX, a_RelY, a_RelZ) != m_BlockType)
 		{
+			// In placing
 			return true;
 		}
 
 		NIBBLETYPE Meta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
 		GetBlockCoordsBehindTheSign(Meta, a_RelX, a_RelZ);
 
-		cChunk * Chunk = a_Chunk.GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
-		BLOCKTYPE BehindBlock = Chunk->GetBlock(a_RelX, a_RelY, a_RelZ);
+		BLOCKTYPE BehindBlock;
+		a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BehindBlock);
 
 		return ((BehindBlock == E_BLOCK_WALLSIGN) || (BehindBlock == E_BLOCK_SIGN_POST) || cBlockInfo::IsSolid(BehindBlock));
 	}