From 270560a198db49464a5a5a6d75d9650a30208bc7 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Sun, 5 May 2013 16:27:08 +0000
Subject: Added the DistortedHeightmap height and composition generator.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1445 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/Generating/DistortedHeightmap.h | 93 ++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 source/Generating/DistortedHeightmap.h

(limited to 'source/Generating/DistortedHeightmap.h')

diff --git a/source/Generating/DistortedHeightmap.h b/source/Generating/DistortedHeightmap.h
new file mode 100644
index 000000000..8c1b136b8
--- /dev/null
+++ b/source/Generating/DistortedHeightmap.h
@@ -0,0 +1,93 @@
+
+// DistortedHeightmap.h
+
+// Declares the cDistortedHeightmap class representing the height and composition generator capable of overhangs
+
+
+
+
+
+#pragma once
+
+#include "ComposableGenerator.h"
+#include "HeiGen.h"
+#include "../Noise.h"
+
+
+
+
+
+#define NOISE_SIZE_Y (257 + 32)
+
+
+
+
+
+class cDistortedHeightmap :
+	public cTerrainHeightGen,
+	public cTerrainCompositionGen
+{
+public:
+	cDistortedHeightmap(int a_Seed, cBiomeGen & a_BiomeGen);
+	
+	void Initialize(cIniFile & a_IniFile);
+	
+protected:
+	typedef cChunkDef::BiomeMap BiomeNeighbors[3][3];
+
+	cNoise m_Noise1;
+	cNoise m_Noise2;
+	cNoise m_Noise3;
+	cNoise m_Noise4;
+	cNoise m_Noise5;
+	
+	int m_SeaLevel;
+	NOISE_DATATYPE m_FrequencyX;
+	NOISE_DATATYPE m_FrequencyY;
+	NOISE_DATATYPE m_FrequencyZ;
+
+	int m_CurChunkX;
+	int m_CurChunkZ;
+	NOISE_DATATYPE m_NoiseArray[17 * 17 * NOISE_SIZE_Y];
+	NOISE_DATATYPE * m_NoiseArrayX;
+	NOISE_DATATYPE * m_NoiseArrayZ;
+
+	cBiomeGen &  m_BiomeGen;
+	cHeiGenCache m_HeightGen;  // This generator provides us with base heightmap (before distortion)
+	
+	// Per-biome terrain generator parameters:
+	struct sGenParam
+	{
+		NOISE_DATATYPE m_DistortAmpX;
+		NOISE_DATATYPE m_DistortAmpZ;
+	} ;
+	static const sGenParam m_GenParam[biNumBiomes];
+	
+	NOISE_DATATYPE m_DistortAmpX[17 * 17];
+	NOISE_DATATYPE m_DistortAmpZ[17 * 17];
+	
+
+	/// Unless the LastChunk coords are equal to coords given, prepares the internal state (noise arrays, heightmap)
+	void PrepareState(int a_ChunkX, int a_ChunkZ);
+	
+	/// Generates the 3D noise array using the specified noise objects
+	void GenerateNoiseArray(NOISE_DATATYPE * a_NoiseArray, cNoise & a_Noise1, cNoise & a_Noise2, cNoise & a_Noise3);
+	
+	/// Calculates the heightmap value (before distortion) at the specified (floating-point) coords
+	int GetHeightmapAt(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Z);
+	
+	/// Calculates the height (after distortion)
+	int GetValue(int a_NoiseArrayIdx, int a_RelX, int a_RelZ);
+	
+	/// Updates m_DistortAmpX/Z[] based on m_CurChunkX and m_CurChunkZ
+	void UpdateDistortAmps(void);
+	
+	/// Calculates the X and Z distortion amplitudes based on the neighbors' biomes
+	void GetDistortAmpsAt(BiomeNeighbors & a_Neighbors, int a_RelX, int a_RelZ, NOISE_DATATYPE & a_DistortAmpX, NOISE_DATATYPE & a_DistortAmpZ);
+	
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+} ;
-- 
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