From e8c905f0781957298528e233e43027001afa62c9 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 31 May 2012 20:34:58 +0000
Subject: DistortedVoronoi biome generator

git-svn-id: http://mc-server.googlecode.com/svn/trunk@532 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/BioGen.cpp          | 58 ++++++++++++++++++++++++++++++++--------------
 source/BioGen.h            | 41 ++++++++++++++++++--------------
 source/cChunkGenerator.cpp |  4 +++-
 3 files changed, 67 insertions(+), 36 deletions(-)

diff --git a/source/BioGen.cpp b/source/BioGen.cpp
index d12d78fde..51e508700 100644
--- a/source/BioGen.cpp
+++ b/source/BioGen.cpp
@@ -25,23 +25,6 @@ void cBioGenConstant::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap
 
 
 
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-// cBioGenDistortedVoronoi:
-
-void cBioGenDistortedVoronoi::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
-{
-	// TODO: Replace this placeholder
-	ASSERT(!"Not implemented yet");
-	for (int i = 0; i < ARRAYCOUNT(a_BiomeMap); i++)
-	{
-		a_BiomeMap[i] = (EMCSBiome)(a_ChunkX + a_ChunkZ);
-	}
-}
-
-
-
-
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // cBiomeGenList:
 
@@ -177,3 +160,44 @@ EMCSBiome cBioGenVoronoi::VoronoiBiome(int a_BlockX, int a_BlockZ)
 
 
 
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenDistortedVoronoi:
+
+void cBioGenDistortedVoronoi::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+	int BaseZ = cChunkDef::Width * a_ChunkZ;
+	int BaseX = cChunkDef::Width * a_ChunkX;
+	for (int z = 0; z < cChunkDef::Width; z++)
+	{
+		int AbsoluteZ = BaseZ + z;
+		for (int x = 0; x < cChunkDef::Width; x++)
+		{
+			int DistX, DistZ;
+			Distort(BaseX + x, AbsoluteZ, DistX, DistZ);
+			cChunkDef::SetBiome(a_BiomeMap, x, z, VoronoiBiome(DistX, DistZ));
+		}  // for x
+	}  // for z
+}
+
+
+
+
+
+void cBioGenDistortedVoronoi::Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ)
+{
+	double NoiseX = m_Noise.CubicNoise3D((float)a_BlockX / m_CellSize, (float)a_BlockZ / m_CellSize, 1000);
+	NoiseX += 0.5 * m_Noise.CubicNoise3D(2 *  (float)a_BlockX / m_CellSize, 2 *  (float)a_BlockZ / m_CellSize, 2000);
+	NoiseX += 0.08 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / m_CellSize, 16 * (float)a_BlockZ / m_CellSize, 3000);
+	double NoiseZ = m_Noise.CubicNoise3D((float)a_BlockX / m_CellSize, (float)a_BlockZ / m_CellSize, 4000);
+	NoiseZ += 0.5 * m_Noise.CubicNoise3D(2 *  (float)a_BlockX / m_CellSize, 2 *  (float)a_BlockZ / m_CellSize, 5000);
+	NoiseZ += 0.08 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / m_CellSize, 16 * (float)a_BlockZ / m_CellSize, 6000);
+	
+	a_DistortedX = a_BlockX + (int)(m_CellSize * 0.5 * NoiseX);
+	a_DistortedZ = a_BlockZ + (int)(m_CellSize * 0.5 * NoiseZ);
+}
+
+
+
+
+
diff --git a/source/BioGen.h b/source/BioGen.h
index e510d0867..e701b6ec9 100644
--- a/source/BioGen.h
+++ b/source/BioGen.h
@@ -39,24 +39,6 @@ protected:
 
 
 
-class cBioGenDistortedVoronoi :
-	public cBiomeGen
-{
-public:
-	cBioGenDistortedVoronoi(int a_Seed) : m_Seed(a_Seed) {}
-
-protected:
-
-	int m_Seed;
-
-	// cBiomeGen override:
-	virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
-} ;
-
-
-
-
-
 /// Base class for generators that use a list of available biomes. This class takes care of the list.
 class cBiomeGenList :
 	public cBiomeGen
@@ -128,3 +110,26 @@ protected:
 
 
 
+
+class cBioGenDistortedVoronoi :
+	public cBioGenVoronoi
+{
+public:
+	cBioGenDistortedVoronoi(int a_Seed, int a_CellSize, const AString & a_Biomes) :
+		cBioGenVoronoi(a_Seed, a_CellSize, a_Biomes)
+	{
+	}
+
+protected:
+
+	// cBiomeGen override:
+	virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
+	
+	/// Distorts the coords using a Perlin-like noise
+	void Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ);
+} ;
+
+
+
+
+
diff --git a/source/cChunkGenerator.cpp b/source/cChunkGenerator.cpp
index e5514ca1f..16c6eae58 100644
--- a/source/cChunkGenerator.cpp
+++ b/source/cChunkGenerator.cpp
@@ -139,7 +139,9 @@ void cChunkGenerator::InitBiomeGen(cIniFile & a_IniFile)
 		{
 			LOGWARNING("Unknown BiomeGen \"%s\", using \"distortedvoronoi\" instead.", BiomeGenName.c_str());
 		}
-		m_BiomeGen = new cBioGenDistortedVoronoi(m_Seed);
+		int CellSize = a_IniFile.GetValueI("Generator", "DistortedVoronoiCellSize", 96);
+		AString Biomes = a_IniFile.GetValue("Generator", "DistortedVoronoiBiomes", "");
+		m_BiomeGen = new cBioGenDistortedVoronoi(m_Seed, CellSize, Biomes);
 	}
 }
 
-- 
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