1 files changed, 53 insertions, 0 deletions

diff --git a/source/Generating/BioGen.h b/source/Generating/BioGen.h
index 6faca09c1..307009a2b 100644
--- a/source/Generating/BioGen.h
+++ b/source/Generating/BioGen.h
@@ -170,3 +170,56 @@ protected:
 
 
 
+class cBioGenMultiStepMap :
+	public cBiomeGen
+{
+public:
+	cBioGenMultiStepMap(int a_Seed);
+	
+	void Init(cIniFile & a_IniFile);
+	
+protected:
+	cNoise m_Noise;
+	int    m_Seed;
+	int    m_OceanCellSize;
+	int    m_MushroomIslandSize;
+	int    m_RiverCellSize;
+	float  m_RiverWidthThreshold;
+	float m_LandBiomesSize;
+	
+	typedef int IntMap[256];  // x + 16 * z, expected trimmed into [0..255] range
+		
+	// cBiomeGen override:
+	virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
+	
+	/** Step 1: Decides between ocean, land and mushroom, using a DistVoronoi with special conditions and post-processing for mushroom islands
+	Sets biomes to biOcean, -1 (i.e. land), biMushroomIsland or biMushroomShore
+	*/
+	void DecideOceanLandMushroom(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
+	
+	/** Step 2: Add rivers to the land
+	Flips some "-1" biomes into biRiver
+	*/
+	void AddRivers(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
+	
+	/** Step 3: Decide land biomes, using Distorted Voronoi and a temperature / humidity map and freezes ocean / river in low temperatures.
+	Flips all remaining "-1" biomes into land biomes. Also flips some biOcean and biRiver into biFrozenOcean, biFrozenRiver, based on temp map.
+	*/
+	void ApplyTemperatureHumidity(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
+	
+	/// Distorts the coords using a Perlin-like noise, with a specified cell-size
+	void Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ, int a_CellSize);
+	
+	/// Builds two Perlin-noise maps, one for temperature, the other for humidity. Trims both into [0..255] range
+	void BuildTemperatureHumidityMaps(int a_ChunkX, int a_ChunkZ, IntMap & a_TemperatureMap, IntMap & a_HumidityMap);
+	
+	/// Flips all remaining "-1" biomes into land biomes using the two maps
+	void DecideLandBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap, const IntMap & a_HumidityMap);
+	
+	/// Flips biOcean and biRiver into biFrozenOcean and biFrozenRiver if the temperature is too low
+	void FreezeWaterBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap);
+} ;
+
+
+
+