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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
// EndGen.cpp
// Implements the cEndGen class representing the generator for the End, both as a HeightGen and CompositionGen
#include "Globals.h"
#include "EndGen.h"
#include "../IniFile.h"
#include "../LinearUpscale.h"
enum
{
// Interpolation cell size:
INTERPOL_X = 4,
INTERPOL_Y = 4,
INTERPOL_Z = 4,
// Size of chunk data, downscaled before interpolation:
DIM_X = 16 / INTERPOL_X + 1,
DIM_Y = 256 / INTERPOL_Y + 1,
DIM_Z = 16 / INTERPOL_Z + 1,
} ;
////////////////////////////////////////////////////////////////////////////////
// cEndGen:
cEndGen::cEndGen(int a_Seed) :
m_Seed(a_Seed),
m_IslandSizeX(256),
m_IslandSizeY(96),
m_IslandSizeZ(256),
m_FrequencyX(80),
m_FrequencyY(80),
m_FrequencyZ(80),
m_LastChunkCoords(0x7fffffff, 0x7fffffff) // Use dummy coords that won't ever be used by real chunks
{
m_Perlin.AddOctave(1, 1);
m_Perlin.AddOctave(2, 0.5);
m_Perlin.AddOctave(4, 0.25);
}
void cEndGen::InitializeCompoGen(cIniFile & a_IniFile)
{
m_IslandSizeX = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeX", m_IslandSizeX);
m_IslandSizeY = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeY", m_IslandSizeY);
m_IslandSizeZ = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeZ", m_IslandSizeZ);
m_FrequencyX = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "EndGenFrequencyX", m_FrequencyX));
m_FrequencyY = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "EndGenFrequencyY", m_FrequencyY));
m_FrequencyZ = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "EndGenFrequencyZ", m_FrequencyZ));
}
void cEndGen::PrepareState(cChunkCoords a_ChunkCoords)
{
if (m_LastChunkCoords == a_ChunkCoords)
{
return;
}
m_LastChunkCoords = a_ChunkCoords;
GenerateNoiseArray();
}
void cEndGen::GenerateNoiseArray(void)
{
NOISE_DATATYPE NoiseData[DIM_X * DIM_Y * DIM_Z]; // [x + DIM_X * z + DIM_X * DIM_Z * y]
NOISE_DATATYPE Workspace[DIM_X * DIM_Y * DIM_Z]; // [x + DIM_X * z + DIM_X * DIM_Z * y]
// Generate the downscaled noise:
NOISE_DATATYPE StartX = static_cast<NOISE_DATATYPE>(m_LastChunkCoords.m_ChunkX * cChunkDef::Width) / m_FrequencyX;
NOISE_DATATYPE EndX = static_cast<NOISE_DATATYPE>((m_LastChunkCoords.m_ChunkX + 1) * cChunkDef::Width) / m_FrequencyX;
NOISE_DATATYPE StartZ = static_cast<NOISE_DATATYPE>(m_LastChunkCoords.m_ChunkZ * cChunkDef::Width) / m_FrequencyZ;
NOISE_DATATYPE EndZ = static_cast<NOISE_DATATYPE>((m_LastChunkCoords.m_ChunkZ + 1) * cChunkDef::Width) / m_FrequencyZ;
NOISE_DATATYPE StartY = 0;
NOISE_DATATYPE EndY = static_cast<NOISE_DATATYPE>(257) / m_FrequencyY;
m_Perlin.Generate3D(NoiseData, DIM_X, DIM_Z, DIM_Y, StartX, EndX, StartZ, EndZ, StartY, EndY, Workspace);
// Add distance:
int idx = 0;
for (int y = 0; y < DIM_Y; y++)
{
NOISE_DATATYPE ValY = static_cast<NOISE_DATATYPE>(2 * INTERPOL_Y * y - m_IslandSizeY) / m_IslandSizeY;
ValY = ValY * ValY;
for (int z = 0; z < DIM_Z; z++)
{
NOISE_DATATYPE ValZ = static_cast<NOISE_DATATYPE>(m_LastChunkCoords.m_ChunkZ * cChunkDef::Width + (z * cChunkDef::Width / (DIM_Z - 1))) / m_IslandSizeZ;
ValZ = ValZ * ValZ;
for (int x = 0; x < DIM_X; x++)
{
// NOISE_DATATYPE ValX = StartX + (EndX - StartX) * x / (DIM_X - 1);
NOISE_DATATYPE ValX = static_cast<NOISE_DATATYPE>(m_LastChunkCoords.m_ChunkX * cChunkDef::Width + (x * cChunkDef::Width / (DIM_X - 1))) / m_IslandSizeX;
ValX = ValX * ValX;
NoiseData[idx++] += ValX + ValZ + ValY;
} // for x
} // for z
} // for y
// Upscale into real chunk size:
LinearUpscale3DArray(NoiseData, DIM_X, DIM_Z, DIM_Y, m_NoiseArray, INTERPOL_X, INTERPOL_Z, INTERPOL_Y);
}
void cEndGen::GenShape(cChunkCoords a_ChunkCoords, cChunkDesc::Shape & a_Shape)
{
PrepareState(a_ChunkCoords);
int MaxY = std::min(static_cast<int>(1.75 * m_IslandSizeY + 1), cChunkDef::Height - 1);
for (int z = 0; z < cChunkDef::Width; z++)
{
for (int x = 0; x < cChunkDef::Width; x++)
{
for (int y = 0; y < MaxY; y++)
{
a_Shape[y + x * 256 + z * 256 * 16] = (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= 0) ? 1 : 0;
}
for (int y = MaxY; y < cChunkDef::Height; y++)
{
a_Shape[y + x * 256 + z * 256 * 16] = 0;
}
} // for x
} // for z
}
void cEndGen::ComposeTerrain(cChunkDesc & a_ChunkDesc, const cChunkDesc::Shape & a_Shape)
{
a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0);
for (int z = 0; z < cChunkDef::Width; z++)
{
for (int x = 0; x < cChunkDef::Width; x++)
{
for (int y = 0; y < cChunkDef::Height; y++)
{
if (a_Shape[(x + 16 * z) * 256 + y] != 0)
{
a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_END_STONE);
}
} // for y
} // for x
} // for z
}
|
