1 files changed, 152 insertions, 0 deletions

diff --git a/src/Blocks/BlockStairs.h b/src/Blocks/BlockStairs.h
new file mode 100644
index 000000000..8d259eee3
--- /dev/null
+++ b/src/Blocks/BlockStairs.h
@@ -0,0 +1,152 @@
+
+#pragma once
+
+#include "BlockHandler.h"
+
+
+
+
+
+class cBlockStairsHandler :
+	public cBlockHandler
+{
+public:
+	cBlockStairsHandler(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
+	{
+		a_BlockType = m_BlockType;
+		a_BlockMeta = RotationToMetaData(a_Player->GetRotation());
+		switch (a_BlockFace)
+		{
+			case BLOCK_FACE_TOP:    break;
+			case BLOCK_FACE_BOTTOM: a_BlockMeta = a_BlockMeta | 0x4; break;  // When placing onto a bottom face, always place an upside-down stairs block
+			case BLOCK_FACE_EAST:
+			case BLOCK_FACE_NORTH:
+			case BLOCK_FACE_SOUTH:
+			case BLOCK_FACE_WEST:
+			{
+				// When placing onto a sideways face, check cursor, if in top half, make it an upside-down stairs block
+				if (a_CursorY > 8)
+				{
+					a_BlockMeta |= 0x4;
+				}
+				break;
+			}
+		}
+		return true;
+	}
+	
+	// TODO: step sound
+	
+	
+	static NIBBLETYPE RotationToMetaData(double a_Rotation)
+	{
+		a_Rotation += 90 + 45; // So its not aligned with axis
+		if (a_Rotation > 360)
+		{
+			a_Rotation -= 360;
+		}
+		if ((a_Rotation >= 0) && (a_Rotation < 90))
+		{
+			return 0x0;
+		}
+		else if ((a_Rotation >= 180) && (a_Rotation < 270))
+		{
+			return 0x1;
+		}
+		else if ((a_Rotation >= 90) && (a_Rotation < 180))
+		{
+			return 0x2;
+		}
+		else
+		{
+			return 0x3;
+		}
+	}
+
+
+	virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
+	{
+		// Bits 3 and 4 stay, the rest is swapped around according to a table:
+		NIBBLETYPE TopBits = (a_Meta & 0x0c);
+		switch (a_Meta & 0x03)
+		{
+			case 0x00: return TopBits | 0x03;  // East -> North
+			case 0x01: return TopBits | 0x02;  // West -> South
+			case 0x02: return TopBits | 0x00;  // South -> East
+			case 0x03: return TopBits | 0x01;  // North -> West
+		}
+		// Not reachable, but to avoid a compiler warning:
+		return 0;
+	}
+
+
+	virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
+	{
+		// Bits 3 and 4 stay, the rest is swapped around according to a table:
+		NIBBLETYPE TopBits = (a_Meta & 0x0c);
+		switch (a_Meta & 0x03)
+		{
+			case 0x00: return TopBits | 0x02;  // East -> South
+			case 0x01: return TopBits | 0x03;  // West -> North
+			case 0x02: return TopBits | 0x01;  // South -> West
+			case 0x03: return TopBits | 0x00;  // North -> East
+		}
+		// Not reachable, but to avoid a compiler warning:
+		return 0;
+	}
+
+
+	virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
+	{
+		// Bits 3 and 4 stay, the rest is swapped around according to a table:
+		NIBBLETYPE TopBits = (a_Meta & 0x0c);
+		switch (a_Meta & 0x03)
+		{
+			case 0x00: return TopBits | 0x00;  // East -> East
+			case 0x01: return TopBits | 0x01;  // West -> West
+			case 0x02: return TopBits | 0x03;  // South -> North
+			case 0x03: return TopBits | 0x02;  // North -> South
+		}
+		// Not reachable, but to avoid a compiler warning:
+		return 0;
+	}
+
+
+	virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override
+	{
+		// Toggle bit 3:
+		return (a_Meta & 0x0b) | ((~a_Meta) & 0x04);
+	}
+
+
+	virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
+	{
+		// Bits 3 and 4 stay, the rest is swapped around according to a table:
+		NIBBLETYPE TopBits = (a_Meta & 0x0c);
+		switch (a_Meta & 0x03)
+		{
+			case 0x00: return TopBits | 0x01;  // East -> West
+			case 0x01: return TopBits | 0x00;  // West -> East
+			case 0x02: return TopBits | 0x02;  // South -> South
+			case 0x03: return TopBits | 0x03;  // North -> North
+		}
+		// Not reachable, but to avoid a compiler warning:
+		return 0;
+	}
+} ;
+
+
+
+