1 files changed, 108 insertions, 0 deletions

diff --git a/src/Blocks/BlockPortal.h b/src/Blocks/BlockPortal.h
new file mode 100644
index 000000000..c56f0cbc8
--- /dev/null
+++ b/src/Blocks/BlockPortal.h
@@ -0,0 +1,108 @@
+
+#pragma once
+
+#include "BlockHandler.h"
+
+
+
+
+
+class cBlockPortalHandler :
+	public cBlockHandler
+{
+public:
+	cBlockPortalHandler(BLOCKTYPE a_BlockType)
+		: cBlockHandler(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
+	{
+		// We set to zero so MCS doesn't stop you from building weird portals like vanilla does
+		// CanBeAt doesn't do anything if meta is zero
+		// We set to zero because the client sends meta = 2 to the server (it calculates rotation itself)
+
+		a_BlockType = m_BlockType;
+		a_BlockMeta = 0;
+		return true;
+	}
+
+
+	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
+	{
+		return; // No pickups
+	}
+
+
+	virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
+	{
+		if ((a_RelY - 1 < 0) || (a_RelY + 1 > cChunkDef::Height))
+		{
+			return false; // In case someone places a portal with meta 1 or 2 at boundaries, and server tries to get invalid coords at Y - 1 or Y + 1
+		}
+
+		switch (a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ))
+		{
+			case 0x1:
+			{
+				static const struct
+				{
+					int x, y, z;
+				} PortalCheck[] =
+				{
+					{ 0, 1,  0},
+					{ 0,-1,  0},
+					{ 1, 0,  0},
+					{-1, 0,  0},
+				} ;
+
+				for (int i = 0; i < ARRAYCOUNT(PortalCheck); i++)
+				{
+					BLOCKTYPE Block;
+					a_Chunk.UnboundedRelGetBlockType(a_RelX + PortalCheck[i].x, a_RelY + PortalCheck[i].y, a_RelZ + PortalCheck[i].z, Block);
+
+					if ((Block != E_BLOCK_NETHER_PORTAL) && (Block != E_BLOCK_OBSIDIAN))
+					{
+						return false;
+					}
+				}
+				break;
+			}
+			case 0x2:
+			{
+				static const struct
+				{
+					int x, y, z;
+				} PortalCheck[] =
+				{
+					{ 0, 1,  0},
+					{ 0,-1,  0},
+					{ 0, 0, -1},
+					{ 0, 0,  1},
+				} ;
+
+				for (int i = 0; i < ARRAYCOUNT(PortalCheck); i++)
+				{
+					BLOCKTYPE Block;
+					a_Chunk.UnboundedRelGetBlockType(a_RelX + PortalCheck[i].x, a_RelY + PortalCheck[i].y, a_RelZ + PortalCheck[i].z, Block);
+
+					if ((Block != E_BLOCK_NETHER_PORTAL) && (Block != E_BLOCK_OBSIDIAN))
+					{
+						return false;
+					}
+				}
+				break;
+			}
+		}
+		return true;
+	}
+} ;
+
+
+
+