1 files changed, 223 insertions, 0 deletions

diff --git a/src/Blocks/BlockChest.h b/src/Blocks/BlockChest.h
new file mode 100644
index 000000000..488c58ac5
--- /dev/null
+++ b/src/Blocks/BlockChest.h
@@ -0,0 +1,223 @@
+
+#pragma once
+
+#include "BlockEntity.h"
+#include "../World.h"
+#include "../BlockArea.h"
+#include "../Entities/Player.h"
+
+
+
+
+
+class cBlockChestHandler :
+	public cBlockEntityHandler
+{
+public:
+	cBlockChestHandler(BLOCKTYPE a_BlockType)
+		: cBlockEntityHandler(a_BlockType)
+	{
+	}
+
+	
+	virtual bool GetPlacementBlockTypeMeta(
+		cWorld * a_World, cPlayer * a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, 
+		int a_CursorX, int a_CursorY, int a_CursorZ,
+		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+	) override
+	{
+		a_BlockType = m_BlockType;
+		
+		// Is there a doublechest already next to this block?
+		if (!CanBeAt(a_World, a_BlockX, a_BlockY, a_BlockZ))
+		{
+			// Yup, cannot form a triple-chest, refuse:
+			return false;
+		}
+		
+		// Check if this forms a doublechest, if so, need to adjust the meta:
+		cBlockArea Area;
+		if (!Area.Read(a_World, a_BlockX - 1, a_BlockX + 1, a_BlockY, a_BlockY, a_BlockZ - 1, a_BlockZ + 1))
+		{
+			return false;
+		}
+		double rot = a_Player->GetRotation();
+		if (
+			(Area.GetRelBlockType(0, 0, 1) == E_BLOCK_CHEST) ||
+			(Area.GetRelBlockType(2, 0, 1) == E_BLOCK_CHEST)
+		)
+		{
+			a_BlockMeta = ((rot >= -90) && (rot < 90)) ? 2 : 3;
+			return true;
+		}
+		if (
+			(Area.GetRelBlockType(0, 0, 1) == E_BLOCK_CHEST) ||
+			(Area.GetRelBlockType(2, 0, 1) == E_BLOCK_CHEST)
+		)
+		{
+			a_BlockMeta = (rot < 0) ? 4 : 5;
+			return true;
+		}
+		
+		// Single chest, get meta from rotation only
+		a_BlockMeta = RotationToMetaData(rot);
+		return true;
+	}
+	
+
+	virtual void OnPlacedByPlayer(
+		cWorld * a_World, cPlayer * a_Player, 
+		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
+		int a_CursorX, int a_CursorY, int a_CursorZ,
+		BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta
+	) override
+	{
+		// Check if this forms a doublechest, if so, need to adjust the meta:
+		cBlockArea Area;
+		if (!Area.Read(a_World, a_BlockX - 1, a_BlockX + 1, a_BlockY, a_BlockY, a_BlockZ - 1, a_BlockZ + 1))
+		{
+			return;
+		}
+		
+		double rot = a_Player->GetRotation();
+		// Choose meta from player rotation, choose only between 2 or 3
+		NIBBLETYPE NewMeta = ((rot >= -90) && (rot < 90)) ? 2 : 3;
+		if (
+			CheckAndAdjustNeighbor(a_World, Area, 0, 1, NewMeta) ||
+			CheckAndAdjustNeighbor(a_World, Area, 2, 1, NewMeta)
+		)
+		{
+			// Forming a double chest in the X direction
+			return;
+		}
+		// Choose meta from player rotation, choose only between 4 or 5
+		NewMeta = (rot < 0) ? 4 : 5;
+		if (
+			CheckAndAdjustNeighbor(a_World, Area, 1, 0, NewMeta) ||
+			CheckAndAdjustNeighbor(a_World, Area, 2, 2, NewMeta)
+		)
+		{
+			// Forming a double chest in the Z direction
+			return;
+		}
+		
+		// Single chest, no further processing needed
+	}
+	
+	
+	virtual const char * GetStepSound(void) override
+	{
+		return "step.wood";
+	}
+	
+	
+	virtual bool CanBeAt(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+	{
+		cBlockArea Area;
+		if (!Area.Read(a_World, a_BlockX - 2, a_BlockX + 2, a_BlockY, a_BlockY, a_BlockZ - 2, a_BlockZ + 2))
+		{
+			// Cannot read the surroundings, probably at the edge of loaded chunks. Disallow.
+			return false;
+		}
+		
+		int NumChestNeighbors = 0;
+		if (Area.GetRelBlockType(1, 0, 2) == E_BLOCK_CHEST)
+		{
+			if (
+				(Area.GetRelBlockType(0, 0, 2) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(1, 0, 1) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(1, 0, 3) == E_BLOCK_CHEST)
+			)
+			{
+				// Already a doublechest neighbor, disallow:
+				return false;
+			}
+			NumChestNeighbors += 1;
+		}
+		if (Area.GetRelBlockType(3, 0, 2) == E_BLOCK_CHEST)
+		{
+			if (
+				(Area.GetRelBlockType(4, 0, 2) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(3, 0, 1) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(3, 0, 3) == E_BLOCK_CHEST)
+			)
+			{
+				// Already a doublechest neighbor, disallow:
+				return false;
+			}
+			NumChestNeighbors += 1;
+		}
+		if (Area.GetRelBlockType(2, 0, 1) == E_BLOCK_CHEST)
+		{
+			if (
+				(Area.GetRelBlockType(2, 0, 0) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(1, 0, 1) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(3, 0, 1) == E_BLOCK_CHEST)
+			)
+			{
+				// Already a doublechest neighbor, disallow:
+				return false;
+			}
+			NumChestNeighbors += 1;
+		}
+		if (Area.GetRelBlockType(2, 0, 3) == E_BLOCK_CHEST)
+		{
+			if (
+				(Area.GetRelBlockType(2, 0, 4) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(1, 0, 3) == E_BLOCK_CHEST) ||
+				(Area.GetRelBlockType(3, 0, 3) == E_BLOCK_CHEST)
+			)
+			{
+				// Already a doublechest neighbor, disallow:
+				return false;
+			}
+			NumChestNeighbors += 1;
+		}
+		return (NumChestNeighbors < 2);
+	}
+	
+	
+	/// Translates player rotation when placing a chest into the chest block metadata. Valid for single chests only
+	static NIBBLETYPE RotationToMetaData(double a_Rotation)
+	{
+		a_Rotation += 90 + 45;  // So its not aligned with axis
+
+		if (a_Rotation > 360.f)
+		{
+			a_Rotation -= 360.f;
+		}
+		if ((a_Rotation >= 0.f) && (a_Rotation < 90.f))
+		{
+			return 0x4;
+		}
+		else if ((a_Rotation >= 180) && (a_Rotation < 270))
+		{
+			return 0x5;
+		}
+		else if ((a_Rotation >= 90) && (a_Rotation < 180))
+		{
+			return 0x2;
+		}
+		else
+		{
+			return 0x3;
+		}
+	}
+	
+	
+	/// If there's a chest in the a_Area in the specified coords, modifies its meta to a_NewMeta and returns true.
+	bool CheckAndAdjustNeighbor(cWorld * a_World, const cBlockArea & a_Area, int a_RelX, int a_RelZ, NIBBLETYPE a_NewMeta)
+	{
+		if (a_Area.GetRelBlockType(a_RelX, 0, a_RelZ) != E_BLOCK_CHEST)
+		{
+			return false;
+		}
+		a_World->SetBlockMeta(a_Area.GetOriginX() + a_RelX, a_Area.GetOriginY(), a_Area.GetOriginZ() + a_RelZ, a_NewMeta);
+		return true;
+	}
+} ;
+
+
+
+