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cuberite-2a/src/Generating/HeiGen.cpp

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// HeiGen.cpp
// Implements the various terrain height generators
#include "Globals.h"
#include "HeiGen.h"
#include "../LinearUpscale.h"
#include "../IniFile.h"
#include "DistortedHeightmap.h"
#include "EndGen.h"
#include "Noise3DGenerator.h"
////////////////////////////////////////////////////////////////////////////////
// cTerrainHeightGen:
cTerrainHeightGenPtr cTerrainHeightGen::CreateHeightGen(cIniFile & a_IniFile, cBiomeGenPtr a_BiomeGen, int a_Seed, bool & a_CacheOffByDefault)
{
AString HeightGenName = a_IniFile.GetValueSet("Generator", "HeightGen", "");
if (HeightGenName.empty())
{
LOGWARN("[Generator] HeightGen value not set in world.ini, using \"Biomal\".");
HeightGenName = "Biomal";
}
a_CacheOffByDefault = false;
cTerrainHeightGen * res = nullptr;
if (NoCaseCompare(HeightGenName, "flat") == 0)
{
res = new cHeiGenFlat;
a_CacheOffByDefault = true; // We're generating faster than a cache would retrieve data
}
else if (NoCaseCompare(HeightGenName, "classic") == 0)
{
res = new cHeiGenClassic(a_Seed);
}
else if (NoCaseCompare(HeightGenName, "DistortedHeightmap") == 0)
{
res = new cDistortedHeightmap(a_Seed, a_BiomeGen);
}
else if (NoCaseCompare(HeightGenName, "End") == 0)
{
res = new cEndGen(a_Seed);
}
else if (NoCaseCompare(HeightGenName, "Mountains") == 0)
{
res = new cHeiGenMountains(a_Seed);
}
else if (NoCaseCompare(HeightGenName, "Noise3D") == 0)
{
res = new cNoise3DComposable(a_Seed);
}
else if (NoCaseCompare(HeightGenName, "biomal") == 0)
{
res = new cHeiGenBiomal(a_Seed, a_BiomeGen);
/*
// Performance-testing:
LOGINFO("Measuring performance of cHeiGenBiomal...");
clock_t BeginTick = clock();
for (int x = 0; x < 500; x++)
{
cChunkDef::HeightMap Heights;
res->GenHeightMap(x * 5, x * 5, Heights);
}
clock_t Duration = clock() - BeginTick;
LOGINFO("HeightGen for 500 chunks took %d ticks (%.02f sec)", Duration, (double)Duration / CLOCKS_PER_SEC);
//*/
}
else
{
// No match found, force-set the default and retry
LOGWARN("Unknown HeightGen \"%s\", using \"Biomal\" instead.", HeightGenName.c_str());
a_IniFile.DeleteValue("Generator", "HeightGen");
a_IniFile.SetValue("Generator", "HeightGen", "Biomal");
return CreateHeightGen(a_IniFile, a_BiomeGen, a_Seed, a_CacheOffByDefault);
}
// Read the settings:
res->InitializeHeightGen(a_IniFile);
return cTerrainHeightGenPtr(res);
}
////////////////////////////////////////////////////////////////////////////////
// cHeiGenFlat:
void cHeiGenFlat::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
{
for (size_t i = 0; i < ARRAYCOUNT(a_HeightMap); i++)
{
a_HeightMap[i] = m_Height;
}
}
void cHeiGenFlat::InitializeHeightGen(cIniFile & a_IniFile)
{
m_Height = a_IniFile.GetValueSetI("Generator", "FlatHeight", m_Height);
}
////////////////////////////////////////////////////////////////////////////////
// cHeiGenCache:
cHeiGenCache::cHeiGenCache(cTerrainHeightGenPtr a_HeiGenToCache, int a_CacheSize) :
m_HeiGenToCache(a_HeiGenToCache),
m_CacheSize(a_CacheSize),
m_CacheOrder(new int[a_CacheSize]),
m_CacheData(new sCacheData[a_CacheSize]),
m_NumHits(0),
m_NumMisses(0),
m_TotalChain(0)
{
for (int i = 0; i < m_CacheSize; i++)
{
m_CacheOrder[i] = i;
m_CacheData[i].m_ChunkX = 0x7fffffff;
m_CacheData[i].m_ChunkZ = 0x7fffffff;
}
}
cHeiGenCache::~cHeiGenCache()
{
delete[] m_CacheData;
m_CacheData = nullptr;
delete[] m_CacheOrder;
m_CacheOrder = nullptr;
}
void cHeiGenCache::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
{
/*
if (((m_NumHits + m_NumMisses) % 1024) == 10)
{
LOGD("HeiGenCache: %d hits, %d misses, saved %.2f %%", m_NumHits, m_NumMisses, 100.0 * m_NumHits / (m_NumHits + m_NumMisses));
LOGD("HeiGenCache: Avg cache chain length: %.2f", (float)m_TotalChain / m_NumHits);
}
//*/
for (int i = 0; i < m_CacheSize; i++)
{
if (
(m_CacheData[m_CacheOrder[i]].m_ChunkX != a_ChunkX) ||
(m_CacheData[m_CacheOrder[i]].m_ChunkZ != a_ChunkZ)
)
{
continue;
}
// Found it in the cache
int Idx = m_CacheOrder[i];
// Move to front:
for (int j = i; j > 0; j--)
{
m_CacheOrder[j] = m_CacheOrder[j - 1];
}
m_CacheOrder[0] = Idx;
// Use the cached data:
memcpy(a_HeightMap, m_CacheData[Idx].m_HeightMap, sizeof(a_HeightMap));
m_NumHits++;
m_TotalChain += i;
return;
} // for i - cache
// Not in the cache:
m_NumMisses++;
m_HeiGenToCache->GenHeightMap(a_ChunkX, a_ChunkZ, a_HeightMap);
// Insert it as the first item in the MRU order:
int Idx = m_CacheOrder[m_CacheSize - 1];
for (int i = m_CacheSize - 1; i > 0; i--)
{
m_CacheOrder[i] = m_CacheOrder[i - 1];
} // for i - m_CacheOrder[]
m_CacheOrder[0] = Idx;
memcpy(m_CacheData[Idx].m_HeightMap, a_HeightMap, sizeof(a_HeightMap));
m_CacheData[Idx].m_ChunkX = a_ChunkX;
m_CacheData[Idx].m_ChunkZ = a_ChunkZ;
}
void cHeiGenCache::InitializeHeightGen(cIniFile & a_IniFile)
{
m_HeiGenToCache->InitializeHeightGen(a_IniFile);
}
bool cHeiGenCache::GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height)
{
for (int i = 0; i < m_CacheSize; i++)
{
if ((m_CacheData[i].m_ChunkX == a_ChunkX) && (m_CacheData[i].m_ChunkZ == a_ChunkZ))
{
a_Height = cChunkDef::GetHeight(m_CacheData[i].m_HeightMap, a_RelX, a_RelZ);
return true;
}
} // for i - m_CacheData[]
return false;
}
////////////////////////////////////////////////////////////////////////////////
// cHeiGenClassic:
cHeiGenClassic::cHeiGenClassic(int a_Seed) :
m_Seed(a_Seed),
m_Noise(a_Seed),
m_HeightFreq1(1.0f),
m_HeightAmp1(1.0f),
m_HeightFreq2(0.5f),
m_HeightAmp2(0.5f),
m_HeightFreq3(0.1f),
m_HeightAmp3(0.1f)
{
}
float cHeiGenClassic::GetNoise(float x, float y)
{
float oct1 = m_Noise.CubicNoise2D(x * m_HeightFreq1, y * m_HeightFreq1) * m_HeightAmp1;
float oct2 = m_Noise.CubicNoise2D(x * m_HeightFreq2, y * m_HeightFreq2) * m_HeightAmp2;
float oct3 = m_Noise.CubicNoise2D(x * m_HeightFreq3, y * m_HeightFreq3) * m_HeightAmp3;
float height = m_Noise.CubicNoise2D(x * 0.1f, y * 0.1f) * 2;
float flatness = ((m_Noise.CubicNoise2D(x * 0.5f, y * 0.5f) + 1.f) * 0.5f) * 1.1f; // 0 ... 1.5
flatness *= flatness * flatness;
return (oct1 + oct2 + oct3) * flatness + height;
}
void cHeiGenClassic::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
{
for (int z = 0; z < cChunkDef::Width; z++)
{
const float zz = (float)(a_ChunkZ * cChunkDef::Width + z);
for (int x = 0; x < cChunkDef::Width; x++)
{
const float xx = (float)(a_ChunkX * cChunkDef::Width + x);
int hei = 64 + (int)(GetNoise(xx * 0.05f, zz * 0.05f) * 16);
if (hei < 10)
{
hei = 10;
}
if (hei > 250)
{
hei = 250;
}
cChunkDef::SetHeight(a_HeightMap, x, z, hei);
} // for x
} // for z
}
void cHeiGenClassic::InitializeHeightGen(cIniFile & a_IniFile)
{
m_HeightFreq1 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightFreq1", 0.1);
m_HeightFreq2 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightFreq2", 1.0);
m_HeightFreq3 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightFreq3", 2.0);
m_HeightAmp1 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightAmp1", 1.0);
m_HeightAmp2 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightAmp2", 0.5);
m_HeightAmp3 = (float)a_IniFile.GetValueSetF("Generator", "ClassicHeightAmp3", 0.5);
}
////////////////////////////////////////////////////////////////////////////////
// cHeiGenMountains:
cHeiGenMountains::cHeiGenMountains(int a_Seed) :
m_Seed(a_Seed),
m_MountainNoise(a_Seed + 100),
m_DitchNoise(a_Seed + 200),
m_Perlin(a_Seed + 300)
{
}
void cHeiGenMountains::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
{
NOISE_DATATYPE StartX = (NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width);
NOISE_DATATYPE EndX = (NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + cChunkDef::Width - 1);
NOISE_DATATYPE StartZ = (NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width);
NOISE_DATATYPE EndZ = (NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + cChunkDef::Width - 1);
NOISE_DATATYPE Workspace[16 * 16];
NOISE_DATATYPE MountainNoise[16 * 16];
NOISE_DATATYPE DitchNoise[16 * 16];
NOISE_DATATYPE PerlinNoise[16 * 16];
m_MountainNoise.Generate2D(MountainNoise, 16, 16, StartX, EndX, StartZ, EndZ, Workspace);
m_DitchNoise.Generate2D(DitchNoise, 16, 16, StartX, EndX, StartZ, EndZ, Workspace);
m_Perlin.Generate2D(PerlinNoise, 16, 16, StartX, EndX, StartZ, EndZ, Workspace);
for (int z = 0; z < cChunkDef::Width; z++)
{
int IdxZ = z * cChunkDef::Width;
for (int x = 0; x < cChunkDef::Width; x++)
{
int idx = IdxZ + x;
int hei = 100 - (int)((MountainNoise[idx] - DitchNoise[idx] + PerlinNoise[idx]) * 15);
if (hei < 10)
{
hei = 10;
}
if (hei > 250)
{
hei = 250;
}
cChunkDef::SetHeight(a_HeightMap, x, z, hei);
} // for x
} // for z
}
void cHeiGenMountains::InitializeHeightGen(cIniFile & a_IniFile)
{
// TODO: Read the params from an INI file
m_MountainNoise.AddOctave(0.1f, 0.2f);
m_MountainNoise.AddOctave(0.05f, 0.4f);
m_MountainNoise.AddOctave(0.02f, 1.0f);
m_DitchNoise.AddOctave(0.1f, 0.2f);
m_DitchNoise.AddOctave(0.05f, 0.4f);
m_DitchNoise.AddOctave(0.02f, 1.0f);
m_Perlin.AddOctave(0.01f, 1.5f);
}
////////////////////////////////////////////////////////////////////////////////
// cHeiGenBiomal:
const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[256] =
{
/* Fast-changing | Middle-changing | Slow-changing |*/
/* Biome | Freq1 | Amp1 | Freq2 | Amp2 | Freq3 | Amp3 | BaseHeight */
/* biOcean */ { 0.1f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 50},
/* biPlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68},
/* biDesert */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68},
/* biExtremeHills */ { 0.2f, 4.0f, 0.05f, 20.0f, 0.01f, 16.0f, 100},
/* biForest */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biSwampland */ { 0.1f, 1.1f, 0.05f, 1.5f, 0.02f, 2.5f, 61.5},
/* biRiver */ { 0.2f, 0.1f, 0.05f, 0.1f, 0.01f, 0.1f, 56},
/* biNether */ { 0.1f, 0.0f, 0.01f, 0.0f, 0.01f, 0.0f, 0}, // Unused, but must be here due to indexing
/* biSky */ { 0.1f, 0.0f, 0.01f, 0.0f, 0.01f, 0.0f, 0}, // Unused, but must be here due to indexing
/* biFrozenOcean */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40},
/* biFrozenRiver */ { 0.2f, 0.1f, 0.05f, 0.1f, 0.01f, 0.1f, 56},
/* biIcePlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68},
/* biIceMountains */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80},
/* biMushroomIsland */ { 0.1f, 2.0f, 0.05f, 8.0f, 0.01f, 6.0f, 80},
/* biMushroomShore */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 64},
/* biBeach */ { 0.1f, 0.5f, 0.05f, 1.0f, 0.01f, 1.0f, 64},
/* biDesertHills */ { 0.2f, 2.0f, 0.05f, 5.0f, 0.01f, 4.0f, 75},
/* biForestHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80},
/* biTaigaHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80},
/* biExtremeHillsEdge */ { 0.2f, 3.0f, 0.05f, 16.0f, 0.01f, 12.0f, 80},
/* biJungle */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70},
/* biJungleHills */ { 0.2f, 3.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80},
/* biJungleEdge */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70},
/* biDeepOcean */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40},
/* biStoneBeach */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40},
/* biColdBeach */ { 0.1f, 0.5f, 0.05f, 1.0f, 0.01f, 1.0f, 64},
/* biBirchForest */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biBirchForestHills */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80},
/* biRoofedForest */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biColdTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biColdTaigaHills */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80},
/* biMegaTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70},
/* biMegaTaigaHills */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80},
/* biExtremeHillsPlus */ { 0.2f, 4.0f, 0.05f, 20.0f, 0.01f, 16.0f, 120},
/* biSavanna */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68},
/* biSavannaPlateau */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80},
/* biMesa */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 70}, // 165
/* biMesaPlateauF */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80},
/* biMesaPlateau */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80},
// biomes 40 .. 128 are unused, 89 empty placeholders here:
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 40 .. 49
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 50 .. 59
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 60 .. 69
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 70 .. 79
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 80 .. 89
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 90 .. 99
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 100 .. 109
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, // 110 .. 119
{}, {}, {}, {}, {}, {}, {}, {}, {}, // 120 .. 128
/* biSunflowerPlains */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 129
/* biDesertM */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 130
/* biExtremeHillsM */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 131
/* biFlowerForest */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 132
/* biTaigaM */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 133
/* biSwamplandM */ { 1.0f, 3.0f, 1.10f, 7.0f, 0.01f, 0.01f, 60}, // 134
// Biomes 135 .. 139 unused, 5 empty placeholders here:
{}, {}, {}, {}, {}, // 135 .. 139
/* biIcePlainsSpikes */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 140
// Biomes 141 .. 148 unused, 8 empty placeholders here:
{}, {}, {}, {}, {}, {}, {}, {}, // 141 .. 148
/* biJungleM */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70}, // 149
{}, // 150
/* biJungleEdgeM */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70}, // 151
{}, {}, {}, // 152 .. 154
/* biBirchForestM */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // 155
/* biBirchForestHillsM */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80}, // 156
/* biRoofedForestM */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // 157
/* biColdTaigaM */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // 158
{}, // 159
/* biMegaSpruceTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // 160
/* biMegaSpruceTaigaHills */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80}, // 161
/* biExtremeHillsPlusM */ { 0.2f, 4.0f, 0.05f, 20.0f, 0.01f, 16.0f, 120}, // 162
/* biSavannaM */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // 163
/* biSavannaPlateauM */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80}, // 164
/* biMesaBryce */ { 0.2f, 2.0f, 0.1f, 30.0f, 0.01f, 8.0f, 80},
/* biMesaPlateauFM */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80}, // 166
/* biMesaPlateauM */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 80}, // 167
} ;
void cHeiGenBiomal::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap)
{
// Generate a 3x3 chunk area of biomes around this chunk:
BiomeNeighbors Biomes;
for (int z = -1; z <= 1; z++)
{
for (int x = -1; x <= 1; x++)
{
m_BiomeGen->GenBiomes(a_ChunkX + x, a_ChunkZ + z, Biomes[x + 1][z + 1]);
} // for x
} // for z
/*
_X 2013_04_22:
There's no point in precalculating the entire perlin noise arrays, too many values are calculated uselessly,
resulting in speed DEcrease.
*/
//*
// Linearly interpolate 4x4 blocks of heightmap:
// Must be done on a floating point datatype, else the results are ugly!
const int STEPZ = 4; // Must be a divisor of 16
const int STEPX = 4; // Must be a divisor of 16
NOISE_DATATYPE Height[17 * 17];
for (int z = 0; z < 17; z += STEPZ)
{
for (int x = 0; x < 17; x += STEPX)
{
Height[x + 17 * z] = GetHeightAt(x, z, a_ChunkX, a_ChunkZ, Biomes);
}
}
LinearUpscale2DArrayInPlace<17, 17, STEPX, STEPZ>(Height);
// Copy into the heightmap
for (int z = 0; z < cChunkDef::Width; z++)
{
for (int x = 0; x < cChunkDef::Width; x++)
{
cChunkDef::SetHeight(a_HeightMap, x, z, (int)Height[x + 17 * z]);
}
}
//*/
/*
// For each height, go through neighboring biomes and add up their idea of height:
for (int z = 0; z < cChunkDef::Width; z++)
{
for (int x = 0; x < cChunkDef::Width; x++)
{
cChunkDef::SetHeight(a_HeightMap, x, z, GetHeightAt(x, z, a_ChunkX, a_ChunkZ, Biomes));
} // for x
}
//*/
}
void cHeiGenBiomal::InitializeHeightGen(cIniFile & a_IniFile)
{
// No user-settable params
}
NOISE_DATATYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const cHeiGenBiomal::BiomeNeighbors & a_BiomeNeighbors)
{
// Sum up how many biomes of each type there are in the neighborhood:
int BiomeCounts[256];
memset(BiomeCounts, 0, sizeof(BiomeCounts));
int Sum = 0;
for (int z = -8; z <= 8; z++)
{
int FinalZ = a_RelZ + z + cChunkDef::Width;
int IdxZ = FinalZ / cChunkDef::Width;
int ModZ = FinalZ % cChunkDef::Width;
int WeightZ = 9 - abs(z);
for (int x = -8; x <= 8; x++)
{
int FinalX = a_RelX + x + cChunkDef::Width;
int IdxX = FinalX / cChunkDef::Width;
int ModX = FinalX % cChunkDef::Width;
EMCSBiome Biome = cChunkDef::GetBiome(a_BiomeNeighbors[IdxX][IdxZ], ModX, ModZ);
int WeightX = 9 - abs(x);
BiomeCounts[Biome] += WeightX + WeightZ;
Sum += WeightX + WeightZ;
} // for x
} // for z
// For each biome type that has a nonzero count, calc its height and add it:
if (Sum > 0)
{
NOISE_DATATYPE Height = 0;
int BlockX = a_ChunkX * cChunkDef::Width + a_RelX;
int BlockZ = a_ChunkZ * cChunkDef::Width + a_RelZ;
for (size_t i = 0; i < ARRAYCOUNT(BiomeCounts); i++)
{
if (BiomeCounts[i] == 0)
{
continue;
}
/*
// Sanity checks for biome parameters, enable them to check the biome param table in runtime (slow):
ASSERT(m_GenParam[i].m_HeightFreq1 >= 0);
ASSERT(m_GenParam[i].m_HeightFreq1 < 1000);
ASSERT(m_GenParam[i].m_HeightFreq2 >= 0);
ASSERT(m_GenParam[i].m_HeightFreq2 < 1000);
ASSERT(m_GenParam[i].m_HeightFreq3 >= 0);
ASSERT(m_GenParam[i].m_HeightFreq3 < 1000);
*/
NOISE_DATATYPE oct1 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq1, BlockZ * m_GenParam[i].m_HeightFreq1) * m_GenParam[i].m_HeightAmp1;
NOISE_DATATYPE oct2 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq2, BlockZ * m_GenParam[i].m_HeightFreq2) * m_GenParam[i].m_HeightAmp2;
NOISE_DATATYPE oct3 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq3, BlockZ * m_GenParam[i].m_HeightFreq3) * m_GenParam[i].m_HeightAmp3;
Height += BiomeCounts[i] * (m_GenParam[i].m_BaseHeight + oct1 + oct2 + oct3);
}
NOISE_DATATYPE res = Height / Sum;
return std::min((NOISE_DATATYPE)250, std::max(res, (NOISE_DATATYPE)5));
}
// No known biome around? Weird. Return a bogus value:
ASSERT(!"cHeiGenBiomal: Biome sum failed, no known biome around");
return 5;
}
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