From b4697ab9dbece2afc8d4edbd86678fa8735578b9 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Tue, 19 Mar 2013 08:32:02 +0000
Subject: The subgenerators use cChunkDesc instead of raw arrays. cChunkDesc is
 based on cBlockArea. Initial version of Lakes generator.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1286 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/BlockArea.cpp | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

(limited to 'source/BlockArea.cpp')

diff --git a/source/BlockArea.cpp b/source/BlockArea.cpp
index 66994f613..61abae716 100644
--- a/source/BlockArea.cpp
+++ b/source/BlockArea.cpp
@@ -92,6 +92,70 @@ static void MergeCombinatorImprint(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, N
 
 
 
+/// Combinator used for cBlockArea::msLake merging
+static void MergeCombinatorLake(BLOCKTYPE & a_DstType, BLOCKTYPE a_SrcType, NIBBLETYPE & a_DstMeta, NIBBLETYPE a_SrcMeta)
+{
+	// Sponge is the NOP block
+	if (a_SrcType == E_BLOCK_SPONGE)
+	{
+		return;
+	}
+
+	// Air is always hollowed out	
+	if (a_SrcType == E_BLOCK_AIR)
+	{
+		a_DstType = E_BLOCK_AIR;
+		a_DstMeta = 0;
+		return;
+	}
+	
+	// Water and lava are never overwritten
+	switch (a_DstType)
+	{
+		case E_BLOCK_WATER:
+		case E_BLOCK_STATIONARY_WATER:
+		case E_BLOCK_LAVA:
+		case E_BLOCK_STATIONARY_LAVA:
+		{
+			return;
+		}
+	}
+	
+	// Water and lava always overwrite
+	switch (a_SrcType)
+	{
+		case E_BLOCK_WATER:
+		case E_BLOCK_STATIONARY_WATER:
+		case E_BLOCK_LAVA:
+		case E_BLOCK_STATIONARY_LAVA:
+		{
+			a_DstType = a_SrcType;
+			a_DstMeta = a_DstMeta;
+			return;
+		}
+	}
+	
+	if (a_SrcType == E_BLOCK_STONE)
+	{
+		switch (a_DstType)
+		{
+			case E_BLOCK_DIRT:
+			case E_BLOCK_GRASS:
+			case E_BLOCK_MYCELIUM:
+			{
+				a_DstType = E_BLOCK_STONE;
+				a_DstMeta = 0;
+				return;
+			}
+		}
+	}
+	// Everything else is left as it is
+}
+
+
+
+
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // cBlockArea:
 
@@ -611,6 +675,21 @@ void cBlockArea::Merge(const cBlockArea & a_Src, int a_RelX, int a_RelY, int a_R
 			break;
 		}  // case msImprint
 		
+		case msLake:
+		{
+			InternalMergeBlocks(
+				m_BlockTypes, a_Src.GetBlockTypes(),
+				DstMetas, SrcMetas,
+				SizeX, SizeY, SizeZ,
+				SrcOffX, SrcOffY, SrcOffZ,
+				DstOffX, DstOffY, DstOffZ,
+				a_Src.GetSizeX(), a_Src.GetSizeY(), a_Src.GetSizeZ(),
+				m_SizeX, m_SizeY, m_SizeZ,
+				MergeCombinatorLake
+			);
+			break;
+		}  // case msLake
+		
 		default:
 		{
 			LOGWARNING("Unknown block area merge strategy: %d", a_Strategy);
-- 
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