From c40eb92de3981ec5a1666b64ab469b4d2df0d85a Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 25 Apr 2013 19:29:56 +0000
Subject: [PATCH] Initial version of "DistortedMembraneOverhangs"

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1412 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/Generating/ComposableGenerator.cpp |  4 ++
 source/Generating/StructGen.cpp           | 49 ++++++++++++++++++++++-
 source/Generating/StructGen.h             | 20 +++++++++
 3 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/source/Generating/ComposableGenerator.cpp b/source/Generating/ComposableGenerator.cpp
index 8c2d2d3c1..1612d038b 100644
--- a/source/Generating/ComposableGenerator.cpp
+++ b/source/Generating/ComposableGenerator.cpp
@@ -360,6 +360,10 @@ void cComposableGenerator::InitStructureGens(cIniFile & a_IniFile)
 		{
 			m_StructureGens.push_back(new cStructGenDirectOverhangs(Seed));
 		}
+		else if (NoCaseCompare(*itr, "DistortedMembraneOverhangs") == 0)
+		{
+			m_StructureGens.push_back(new cStructGenDistortedMembraneOverhangs(Seed));
+		}
 		else if (NoCaseCompare(*itr, "LavaLakes") == 0)
 		{
 			int Probability = a_IniFile.GetValueSetI("Generator", "LavaLakesProbability", 10);
diff --git a/source/Generating/StructGen.cpp b/source/Generating/StructGen.cpp
index c9af06afb..044e789b5 100644
--- a/source/Generating/StructGen.cpp
+++ b/source/Generating/StructGen.cpp
@@ -513,7 +513,7 @@ void cStructGenLakes::CreateLakeImage(int a_ChunkX, int a_ChunkZ, cBlockArea & a
 
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// cStructGenBiomeOverhangs:
+// cStructGenDirectOverhangs:
 
 cStructGenDirectOverhangs::cStructGenDirectOverhangs(int a_Seed) :
 	m_Noise1(a_Seed),
@@ -625,3 +625,50 @@ bool cStructGenDirectOverhangs::HasWantedBiome(cChunkDesc & a_ChunkDesc) const
 
 
 
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cStructGenDistortedMembraneOverhangs:
+
+cStructGenDistortedMembraneOverhangs::cStructGenDistortedMembraneOverhangs(int a_Seed) :
+	m_NoiseX(a_Seed + 1000),
+	m_NoiseY(a_Seed + 2000),
+	m_NoiseZ(a_Seed + 3000),
+	m_NoiseH(a_Seed + 4000)
+{
+}
+
+
+
+
+
+void cStructGenDistortedMembraneOverhangs::GenStructures(cChunkDesc & a_ChunkDesc)
+{
+	const NOISE_DATATYPE Frequency = (NOISE_DATATYPE)16;
+	const NOISE_DATATYPE Amount = (NOISE_DATATYPE)1;
+	for (int y = 50; y < 128; y++)
+	{
+		NOISE_DATATYPE NoiseY = (NOISE_DATATYPE)y / 32;
+		// TODO: proper water level - where to get?
+		BLOCKTYPE ReplacementBlock = (y > 62) ? E_BLOCK_AIR : E_BLOCK_STATIONARY_WATER;
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			NOISE_DATATYPE NoiseZ = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + z)) / Frequency;
+			for (int x = 0; x < cChunkDef::Width; x++)
+			{
+				NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + x)) / Frequency;
+				NOISE_DATATYPE DistortX = m_NoiseX.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount;
+				NOISE_DATATYPE DistortY = m_NoiseY.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount;
+				NOISE_DATATYPE DistortZ = m_NoiseZ.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount;
+				int MembraneHeight = 96 - (int)((DistortY + m_NoiseH.CubicNoise2D(NoiseX + DistortX, NoiseZ + DistortZ)) * 30);
+				if (MembraneHeight < y)
+				{
+					a_ChunkDesc.SetBlockType(x, y, z, ReplacementBlock);
+				}
+			}  // for y
+		}  // for x
+	}  // for z
+}
+
+
+
+
diff --git a/source/Generating/StructGen.h b/source/Generating/StructGen.h
index 907c66544..853748bb8 100644
--- a/source/Generating/StructGen.h
+++ b/source/Generating/StructGen.h
@@ -143,3 +143,23 @@ protected:
 
 
 
+
+class cStructGenDistortedMembraneOverhangs :
+	public cStructureGen
+{
+public:
+	cStructGenDistortedMembraneOverhangs(int a_Seed);
+
+protected:
+	cNoise m_NoiseX;
+	cNoise m_NoiseY;
+	cNoise m_NoiseZ;
+	cNoise m_NoiseH;
+	
+	// cStructureGen override:
+	virtual void GenStructures(cChunkDesc & a_ChunkDesc) override;
+} ;
+
+
+
+