From 8dc54301a4f0c1d92d9775c3f97901acbf0230f6 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Tue, 26 Mar 2013 21:06:12 +0000
Subject: BlockArea: Finished rotation and mirroring with meta. Implemented
 example meta handling for vines, stairs and torches.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1319 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/Blocks/BlockStairs.h | 71 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

(limited to 'source/Blocks/BlockStairs.h')

diff --git a/source/Blocks/BlockStairs.h b/source/Blocks/BlockStairs.h
index 6fcbc2cba..9f135b37d 100644
--- a/source/Blocks/BlockStairs.h
+++ b/source/Blocks/BlockStairs.h
@@ -49,6 +49,77 @@ public:
 	}
 	
 	// TODO: step sound
+	
+	
+	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;
+	}
 } ;
 
 
-- 
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