1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
// 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:
/// Structure used for storing block patterns for columns
struct sBlockInfo
{
BLOCKTYPE BlockType;
NIBBLETYPE BlockMeta;
} ;
cDistortedHeightmap(int a_Seed, cBiomeGen & a_BiomeGen);
protected:
typedef cChunkDef::BiomeMap BiomeNeighbors[3][3];
// Linear upscaling step sizes, must be divisors of cChunkDef::Width and cChunkDef::Height, respectively:
static const int INTERPOL_X = 8;
static const int INTERPOL_Y = 4;
static const int INTERPOL_Z = 8;
// Linear upscaling buffer dimensions, calculated from the step sizes:
static const int DIM_X = 1 + (17 / INTERPOL_X);
static const int DIM_Y = 1 + (257 / INTERPOL_Y);
static const int DIM_Z = 1 + (17 / INTERPOL_Z);
cPerlinNoise m_NoiseDistortX;
cPerlinNoise m_NoiseDistortZ;
cNoise m_OceanFloorSelect; ///< Used for selecting between dirt and sand on the ocean floor
cNoise m_MesaFloor; ///< Used for the floor of the clay blocks in mesa biomes
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 * 257 * 17];
cBiomeGen & m_BiomeGen;
cHeiGenMesaBryce 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[256];
// Distortion amplitudes for each direction, before linear upscaling
NOISE_DATATYPE m_DistortAmpX[DIM_X * DIM_Z];
NOISE_DATATYPE m_DistortAmpZ[DIM_X * DIM_Z];
/// True if Initialize() has been called. Used to initialize-once even with multiple init entrypoints (HeiGen / CompoGen)
bool m_IsInitialized;
/// The vertical pattern to be used for mesa biomes. Seed-dependant.
/// One Height of pattern and one Height of stone to avoid checking pattern dimensions
sBlockInfo m_MesaPattern[2 * cChunkDef::Height];
/// Initializes m_MesaPattern with a reasonable pattern of stained clay / hardened clay, based on the seed
void InitMesaPattern(int a_Seed);
/// 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);
/// Reads the settings from the ini file. Skips reading if already initialized
void Initialize(cIniFile & a_IniFile);
/// Composes a single column in a_ChunkDesc. Chooses what to do based on the biome in that column
void ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ);
/// Fills the specified column with the specified pattern; restarts the pattern when air is reached,
/// switches to ocean floor pattern if ocean is reached. Always adds bedrock at the very bottom.
void FillColumnPattern(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const sBlockInfo * a_Pattern);
/// Fills the specified column with mesa pattern, based on the column height
void FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ);
/// Returns the pattern to use for an ocean floor in the specified column
const sBlockInfo * ChooseOceanFloorPattern(int a_RelX, int a_RelZ);
// cTerrainHeightGen overrides:
virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
virtual void InitializeHeightGen(cIniFile & a_IniFile) override;
// cTerrainCompositionGen overrides:
virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
} ;
|
