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// 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_DistortedHeightmap[17 * 17 * 257];
cBiomeGen & m_BiomeGen;
cHeiGenBiomal m_UnderlyingHeiGen; // This generator provides us with base heightmap (before distortion)
cHeiGenCache m_HeightGen; // Cache above m_UnderlyingHeiGen
/// Heightmap for the current chunk, before distortion (from m_HeightGen). Used for optimization.
cChunkDef::HeightMap m_CurChunkHeights;
// 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 m_DistortedHeightmap array for the current chunk
void GenerateHeightArray(void);
/// Calculates the heightmap value (before distortion) at the specified (floating-point) coords
int GetHeightmapAt(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Z);
/// 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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