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-rw-r--r--src/Generating/BioGen.cpp707
1 files changed, 707 insertions, 0 deletions
diff --git a/src/Generating/BioGen.cpp b/src/Generating/BioGen.cpp
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--- /dev/null
+++ b/src/Generating/BioGen.cpp
@@ -0,0 +1,707 @@
+
+// BioGen.cpp
+
+// Implements the various biome generators
+
+#include "Globals.h"
+#include "BioGen.h"
+#include "inifile/iniFile.h"
+#include "../LinearUpscale.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenConstant:
+
+void cBioGenConstant::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ for (int i = 0; i < ARRAYCOUNT(a_BiomeMap); i++)
+ {
+ a_BiomeMap[i] = m_Biome;
+ }
+}
+
+
+
+
+
+void cBioGenConstant::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ AString Biome = a_IniFile.GetValueSet("Generator", "ConstantBiome", "Plains");
+ m_Biome = StringToBiome(Biome);
+ if (m_Biome == -1)
+ {
+ LOGWARN("[Generator]::ConstantBiome value \"%s\" not recognized, using \"Plains\".", Biome.c_str());
+ m_Biome = biPlains;
+ }
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenCache:
+
+cBioGenCache::cBioGenCache(cBiomeGen * a_BioGenToCache, int a_CacheSize) :
+ m_BioGenToCache(a_BioGenToCache),
+ 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;
+ }
+}
+
+
+
+
+
+cBioGenCache::~cBioGenCache()
+{
+ delete[] m_CacheData;
+ delete[] m_CacheOrder;
+}
+
+
+
+
+
+void cBioGenCache::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ if (((m_NumHits + m_NumMisses) % 1024) == 10)
+ {
+ LOGD("BioGenCache: %d hits, %d misses, saved %.2f %%", m_NumHits, m_NumMisses, 100.0 * m_NumHits / (m_NumHits + m_NumMisses));
+ LOGD("BioGenCache: 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_BiomeMap, m_CacheData[Idx].m_BiomeMap, sizeof(a_BiomeMap));
+
+ m_NumHits++;
+ m_TotalChain += i;
+ return;
+ } // for i - cache
+
+ // Not in the cache:
+ m_NumMisses++;
+ m_BioGenToCache->GenBiomes(a_ChunkX, a_ChunkZ, a_BiomeMap);
+
+ // 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_BiomeMap, a_BiomeMap, sizeof(a_BiomeMap));
+ m_CacheData[Idx].m_ChunkX = a_ChunkX;
+ m_CacheData[Idx].m_ChunkZ = a_ChunkZ;
+}
+
+
+
+
+
+void cBioGenCache::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ super::InitializeBiomeGen(a_IniFile);
+ m_BioGenToCache->InitializeBiomeGen(a_IniFile);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBiomeGenList:
+
+void cBiomeGenList::InitializeBiomes(const AString & a_Biomes)
+{
+ AStringVector Split = StringSplit(a_Biomes, ",");
+
+ // Convert each string in the list into biome:
+ for (AStringVector::const_iterator itr = Split.begin(); itr != Split.end(); ++itr)
+ {
+ AStringVector Split2 = StringSplit(*itr, ":");
+ if (Split2.size() < 1)
+ {
+ continue;
+ }
+ int Count = 1;
+ if (Split2.size() >= 2)
+ {
+ Count = atol(Split2[1].c_str());
+ if (Count <= 0)
+ {
+ LOGWARNING("Cannot decode biome count: \"%s\"; using 1.", Split2[1].c_str());
+ Count = 1;
+ }
+ }
+ EMCSBiome Biome = StringToBiome(Split2[0]);
+ if (Biome != -1)
+ {
+ for (int i = 0; i < Count; i++)
+ {
+ m_Biomes.push_back(Biome);
+ }
+ }
+ else
+ {
+ LOGWARNING("Cannot decode biome name: \"%s\"; skipping", Split2[0].c_str());
+ }
+ } // for itr - Split[]
+ if (!m_Biomes.empty())
+ {
+ m_BiomesCount = (int)m_Biomes.size();
+ return;
+ }
+
+ // There were no biomes, add default biomes:
+ static EMCSBiome Biomes[] =
+ {
+ biOcean,
+ biPlains,
+ biDesert,
+ biExtremeHills,
+ biForest,
+ biTaiga,
+ biSwampland,
+ biRiver,
+ biFrozenOcean,
+ biFrozenRiver,
+ biIcePlains,
+ biIceMountains,
+ biMushroomIsland,
+ biMushroomShore,
+ biBeach,
+ biDesertHills,
+ biForestHills,
+ biTaigaHills,
+ biExtremeHillsEdge,
+ biJungle,
+ biJungleHills,
+ } ;
+ m_Biomes.reserve(ARRAYCOUNT(Biomes));
+ for (int i = 0; i < ARRAYCOUNT(Biomes); i++)
+ {
+ m_Biomes.push_back(Biomes[i]);
+ }
+ m_BiomesCount = (int)m_Biomes.size();
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenCheckerboard:
+
+void cBioGenCheckerboard::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ int Base = cChunkDef::Width * a_ChunkZ + z;
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ int Add = cChunkDef::Width * a_ChunkX + x;
+ a_BiomeMap[x + cChunkDef::Width * z] = m_Biomes[(Base / m_BiomeSize + Add / m_BiomeSize) % m_BiomesCount];
+ }
+ }
+}
+
+
+
+
+
+void cBioGenCheckerboard::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ super::InitializeBiomeGen(a_IniFile);
+ AString Biomes = a_IniFile.GetValueSet ("Generator", "CheckerBoardBiomes", "");
+ m_BiomeSize = a_IniFile.GetValueSetI("Generator", "CheckerboardBiomeSize", 64);
+ m_BiomeSize = (m_BiomeSize < 8) ? 8 : m_BiomeSize;
+ InitializeBiomes(Biomes);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenVoronoi :
+
+void cBioGenVoronoi::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ int BaseZ = cChunkDef::Width * a_ChunkZ;
+ int BaseX = cChunkDef::Width * a_ChunkX;
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ int AbsoluteZ = BaseZ + z;
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ cChunkDef::SetBiome(a_BiomeMap, x, z, VoronoiBiome(BaseX + x, AbsoluteZ));
+ } // for x
+ } // for z
+}
+
+
+
+
+
+void cBioGenVoronoi::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ super::InitializeBiomeGen(a_IniFile);
+ m_CellSize = a_IniFile.GetValueSetI("Generator", "VoronoiCellSize", 64);
+ AString Biomes = a_IniFile.GetValueSet ("Generator", "VoronoiBiomes", "");
+ InitializeBiomes(Biomes);
+}
+
+
+
+
+
+EMCSBiome cBioGenVoronoi::VoronoiBiome(int a_BlockX, int a_BlockZ)
+{
+ int CellX = a_BlockX / m_CellSize;
+ int CellZ = a_BlockZ / m_CellSize;
+
+ // Note that Noise values need to be divided by 8 to gain a uniform modulo-2^n distribution
+
+ // Get 5x5 neighboring cell seeds, compare distance to each. Return the biome in the minumim-distance cell
+ int MinDist = m_CellSize * m_CellSize * 16; // There has to be a cell closer than this
+ EMCSBiome res = biPlains; // Will be overriden
+ for (int x = CellX - 2; x <= CellX + 2; x++)
+ {
+ int BaseX = x * m_CellSize;
+ for (int z = CellZ - 2; z < CellZ + 2; z++)
+ {
+ int OffsetX = (m_Noise.IntNoise3DInt(x, 16 * x + 32 * z, z) / 8) % m_CellSize;
+ int OffsetZ = (m_Noise.IntNoise3DInt(x, 32 * x - 16 * z, z) / 8) % m_CellSize;
+ int SeedX = BaseX + OffsetX;
+ int SeedZ = z * m_CellSize + OffsetZ;
+
+ int Dist = (SeedX - a_BlockX) * (SeedX - a_BlockX) + (SeedZ - a_BlockZ) * (SeedZ - a_BlockZ);
+ if (Dist < MinDist)
+ {
+ MinDist = Dist;
+ res = m_Biomes[(m_Noise.IntNoise3DInt(x, x - z + 1000, z) / 8) % m_BiomesCount];
+ }
+ } // for z
+ } // for x
+
+ return res;
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenDistortedVoronoi:
+
+void cBioGenDistortedVoronoi::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ int BaseZ = cChunkDef::Width * a_ChunkZ;
+ int BaseX = cChunkDef::Width * a_ChunkX;
+
+ // Distortions for linear interpolation:
+ int DistortX[cChunkDef::Width + 1][cChunkDef::Width + 1];
+ int DistortZ[cChunkDef::Width + 1][cChunkDef::Width + 1];
+ for (int x = 0; x <= 4; x++) for (int z = 0; z <= 4; z++)
+ {
+ Distort(BaseX + x * 4, BaseZ + z * 4, DistortX[4 * x][4 * z], DistortZ[4 * x][4 * z]);
+ }
+
+ LinearUpscale2DArrayInPlace(&DistortX[0][0], cChunkDef::Width + 1, cChunkDef::Width + 1, 4, 4);
+ LinearUpscale2DArrayInPlace(&DistortZ[0][0], cChunkDef::Width + 1, cChunkDef::Width + 1, 4, 4);
+
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ int AbsoluteZ = BaseZ + z;
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ // Distort(BaseX + x, AbsoluteZ, DistX, DistZ);
+ cChunkDef::SetBiome(a_BiomeMap, x, z, VoronoiBiome(DistortX[x][z], DistortZ[x][z]));
+ } // for x
+ } // for z
+}
+
+
+
+
+
+void cBioGenDistortedVoronoi::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ // Do NOT call super::InitializeBiomeGen(), as it would try to read Voronoi params instead of DistortedVoronoi params
+ m_CellSize = a_IniFile.GetValueSetI("Generator", "DistortedVoronoiCellSize", 96);
+ AString Biomes = a_IniFile.GetValueSet ("Generator", "DistortedVoronoiBiomes", "");
+ InitializeBiomes(Biomes);
+}
+
+
+
+
+void cBioGenDistortedVoronoi::Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ)
+{
+ double NoiseX = m_Noise.CubicNoise3D((float)a_BlockX / m_CellSize, (float)a_BlockZ / m_CellSize, 1000);
+ NoiseX += 0.5 * m_Noise.CubicNoise3D(2 * (float)a_BlockX / m_CellSize, 2 * (float)a_BlockZ / m_CellSize, 2000);
+ NoiseX += 0.08 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / m_CellSize, 16 * (float)a_BlockZ / m_CellSize, 3000);
+ double NoiseZ = m_Noise.CubicNoise3D((float)a_BlockX / m_CellSize, (float)a_BlockZ / m_CellSize, 4000);
+ NoiseZ += 0.5 * m_Noise.CubicNoise3D(2 * (float)a_BlockX / m_CellSize, 2 * (float)a_BlockZ / m_CellSize, 5000);
+ NoiseZ += 0.08 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / m_CellSize, 16 * (float)a_BlockZ / m_CellSize, 6000);
+
+ a_DistortedX = a_BlockX + (int)(m_CellSize * 0.5 * NoiseX);
+ a_DistortedZ = a_BlockZ + (int)(m_CellSize * 0.5 * NoiseZ);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cBioGenMultiStepMap :
+
+cBioGenMultiStepMap::cBioGenMultiStepMap(int a_Seed) :
+ m_Noise1(a_Seed + 1000),
+ m_Noise2(a_Seed + 2000),
+ m_Noise3(a_Seed + 3000),
+ m_Noise4(a_Seed + 4000),
+ m_Noise5(a_Seed + 5000),
+ m_Noise6(a_Seed + 6000),
+ m_Seed(a_Seed),
+ m_OceanCellSize(384),
+ m_MushroomIslandSize(64),
+ m_RiverCellSize(384),
+ m_RiverWidthThreshold(0.125),
+ m_LandBiomesSize(1024)
+{
+}
+
+
+
+
+
+void cBioGenMultiStepMap::InitializeBiomeGen(cIniFile & a_IniFile)
+{
+ m_OceanCellSize = a_IniFile.GetValueSetI("Generator", "MultiStepMapOceanCellSize", m_OceanCellSize);
+ m_MushroomIslandSize = a_IniFile.GetValueSetI("Generator", "MultiStepMapMushroomIslandSize", m_MushroomIslandSize);
+ m_RiverCellSize = a_IniFile.GetValueSetI("Generator", "MultiStepMapRiverCellSize", m_RiverCellSize);
+ m_RiverWidthThreshold = a_IniFile.GetValueSetF("Generator", "MultiStepMapRiverWidth", m_RiverWidthThreshold);
+ m_LandBiomesSize = (float)a_IniFile.GetValueSetI("Generator", "MultiStepMapLandBiomeSize", (int)m_LandBiomesSize);
+}
+
+
+
+
+
+void cBioGenMultiStepMap::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ DecideOceanLandMushroom(a_ChunkX, a_ChunkZ, a_BiomeMap);
+ AddRivers(a_ChunkX, a_ChunkZ, a_BiomeMap);
+ ApplyTemperatureHumidity(a_ChunkX, a_ChunkZ, a_BiomeMap);
+}
+
+
+
+
+
+void cBioGenMultiStepMap::DecideOceanLandMushroom(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ // Distorted Voronoi over 3 biomes, with mushroom having only a special occurence.
+
+ // Prepare a distortion lookup table, by distorting a 5x5 area and using that as 1:4 zoom (linear interpolate):
+ int BaseZ = cChunkDef::Width * a_ChunkZ;
+ int BaseX = cChunkDef::Width * a_ChunkX;
+ int DistortX[cChunkDef::Width + 1][cChunkDef::Width + 1];
+ int DistortZ[cChunkDef::Width + 1][cChunkDef::Width + 1];
+ int DistortSize = m_OceanCellSize / 2;
+ for (int x = 0; x <= 4; x++) for (int z = 0; z <= 4; z++)
+ {
+ Distort(BaseX + x * 4, BaseZ + z * 4, DistortX[4 * x][4 * z], DistortZ[4 * x][4 * z], DistortSize);
+ }
+ LinearUpscale2DArrayInPlace(&DistortX[0][0], cChunkDef::Width + 1, cChunkDef::Width + 1, 4, 4);
+ LinearUpscale2DArrayInPlace(&DistortZ[0][0], cChunkDef::Width + 1, cChunkDef::Width + 1, 4, 4);
+
+ // Prepare a 9x9 area of neighboring cell seeds
+ // (assuming that 7x7 cell area is larger than a chunk being generated)
+ const int NEIGHBORHOOD_SIZE = 4; // How many seeds in each direction to check
+ int CellX = BaseX / m_OceanCellSize;
+ int CellZ = BaseZ / m_OceanCellSize;
+ int SeedX[2 * NEIGHBORHOOD_SIZE + 1][2 * NEIGHBORHOOD_SIZE + 1];
+ int SeedZ[2 * NEIGHBORHOOD_SIZE + 1][2 * NEIGHBORHOOD_SIZE + 1];
+ EMCSBiome SeedV[2 * NEIGHBORHOOD_SIZE + 1][2 * NEIGHBORHOOD_SIZE + 1];
+ for (int xc = 0; xc < 2 * NEIGHBORHOOD_SIZE + 1; xc++)
+ {
+ int RealCellX = xc + CellX - NEIGHBORHOOD_SIZE;
+ int CellBlockX = RealCellX * m_OceanCellSize;
+ for (int zc = 0; zc < 2 * NEIGHBORHOOD_SIZE + 1; zc++)
+ {
+ int RealCellZ = zc + CellZ - NEIGHBORHOOD_SIZE;
+ int CellBlockZ = RealCellZ * m_OceanCellSize;
+ int OffsetX = (m_Noise2.IntNoise3DInt(RealCellX, 16 * RealCellX + 32 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
+ int OffsetZ = (m_Noise4.IntNoise3DInt(RealCellX, 32 * RealCellX - 16 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
+ SeedX[xc][zc] = CellBlockX + OffsetX;
+ SeedZ[xc][zc] = CellBlockZ + OffsetZ;
+ SeedV[xc][zc] = (((m_Noise6.IntNoise3DInt(RealCellX, RealCellX - RealCellZ + 1000, RealCellZ) / 11) % 256) > 90) ? biOcean : ((EMCSBiome)(-1));
+ } // for z
+ } // for x
+
+ for (int xc = 1; xc < 2 * NEIGHBORHOOD_SIZE; xc++) for (int zc = 1; zc < 2 * NEIGHBORHOOD_SIZE; zc++)
+ {
+ if (
+ (SeedV[xc ][zc] == biOcean) &&
+ (SeedV[xc - 1][zc] == biOcean) &&
+ (SeedV[xc + 1][zc] == biOcean) &&
+ (SeedV[xc ][zc - 1] == biOcean) &&
+ (SeedV[xc ][zc + 1] == biOcean) &&
+ (SeedV[xc - 1][zc - 1] == biOcean) &&
+ (SeedV[xc + 1][zc - 1] == biOcean) &&
+ (SeedV[xc - 1][zc + 1] == biOcean) &&
+ (SeedV[xc + 1][zc + 1] == biOcean)
+ )
+ {
+ SeedV[xc][zc] = biMushroomIsland;
+ }
+ }
+
+ // For each column find the nearest distorted cell and use its value as the biome:
+ int MushroomOceanThreshold = m_OceanCellSize * m_OceanCellSize * m_MushroomIslandSize / 1024;
+ int MushroomShoreThreshold = m_OceanCellSize * m_OceanCellSize * m_MushroomIslandSize / 2048;
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ int AbsoluteZ = DistortZ[x][z];
+ int AbsoluteX = DistortX[x][z];
+ int MinDist = m_OceanCellSize * m_OceanCellSize * 16; // There has to be a cell closer than this
+ EMCSBiome Biome = biPlains;
+ // Find the nearest cell seed:
+ for (int xs = 1; xs < 2 * NEIGHBORHOOD_SIZE; xs++) for (int zs = 1; zs < 2 * NEIGHBORHOOD_SIZE; zs++)
+ {
+ int Dist = (SeedX[xs][zs] - AbsoluteX) * (SeedX[xs][zs] - AbsoluteX) + (SeedZ[xs][zs] - AbsoluteZ) * (SeedZ[xs][zs] - AbsoluteZ);
+ if (Dist >= MinDist)
+ {
+ continue;
+ }
+ MinDist = Dist;
+ Biome = SeedV[xs][zs];
+ // Shrink mushroom biome and add a shore:
+ if (Biome == biMushroomIsland)
+ {
+ if (Dist > MushroomOceanThreshold)
+ {
+ Biome = biOcean;
+ }
+ else if (Dist > MushroomShoreThreshold)
+ {
+ Biome = biMushroomShore;
+ }
+ }
+ } // for zs, xs
+
+ cChunkDef::SetBiome(a_BiomeMap, x, z, Biome);
+ } // for x
+ } // for z
+}
+
+
+
+
+
+void cBioGenMultiStepMap::AddRivers(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ float NoiseCoordZ = (float)(a_ChunkZ * cChunkDef::Width + z) / m_RiverCellSize;
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ if (cChunkDef::GetBiome(a_BiomeMap, x, z) != -1)
+ {
+ // Biome already set, skip this column
+ continue;
+ }
+
+ float NoiseCoordX = (float)(a_ChunkX * cChunkDef::Width + x) / m_RiverCellSize;
+
+ double Noise = m_Noise1.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
+ Noise += 0.5 * m_Noise3.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
+ Noise += 0.1 * m_Noise5.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
+
+ if ((Noise > 0) && (Noise < m_RiverWidthThreshold))
+ {
+ cChunkDef::SetBiome(a_BiomeMap, x, z, biRiver);
+ }
+ } // for x
+ } // for z
+}
+
+
+
+
+
+void cBioGenMultiStepMap::ApplyTemperatureHumidity(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
+{
+ IntMap TemperatureMap;
+ IntMap HumidityMap;
+ BuildTemperatureHumidityMaps(a_ChunkX, a_ChunkZ, TemperatureMap, HumidityMap);
+
+ FreezeWaterBiomes(a_BiomeMap, TemperatureMap);
+ DecideLandBiomes(a_BiomeMap, TemperatureMap, HumidityMap);
+}
+
+
+
+
+
+void cBioGenMultiStepMap::Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ, int a_CellSize)
+{
+ double NoiseX = m_Noise3.CubicNoise2D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize);
+ NoiseX += 0.5 * m_Noise2.CubicNoise2D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize);
+ NoiseX += 0.1 * m_Noise1.CubicNoise2D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize);
+ double NoiseZ = m_Noise6.CubicNoise2D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize);
+ NoiseZ += 0.5 * m_Noise5.CubicNoise2D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize);
+ NoiseZ += 0.1 * m_Noise4.CubicNoise2D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize);
+
+ a_DistortedX = a_BlockX + (int)(a_CellSize * 0.5 * NoiseX);
+ a_DistortedZ = a_BlockZ + (int)(a_CellSize * 0.5 * NoiseZ);
+}
+
+
+
+
+
+void cBioGenMultiStepMap::BuildTemperatureHumidityMaps(int a_ChunkX, int a_ChunkZ, IntMap & a_TemperatureMap, IntMap & a_HumidityMap)
+{
+ // Linear interpolation over 8x8 blocks; use double for better precision:
+ DblMap TemperatureMap;
+ DblMap HumidityMap;
+ for (int z = 0; z < 17; z += 8)
+ {
+ float NoiseCoordZ = (float)(a_ChunkZ * cChunkDef::Width + z) / m_LandBiomesSize;
+ for (int x = 0; x < 17; x += 8)
+ {
+ float NoiseCoordX = (float)(a_ChunkX * cChunkDef::Width + x) / m_LandBiomesSize;
+
+ double NoiseT = m_Noise1.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
+ NoiseT += 0.5 * m_Noise2.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
+ NoiseT += 0.1 * m_Noise3.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
+ TemperatureMap[x + 17 * z] = NoiseT;
+
+ double NoiseH = m_Noise4.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
+ NoiseH += 0.5 * m_Noise5.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
+ NoiseH += 0.1 * m_Noise6.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
+ HumidityMap[x + 17 * z] = NoiseH;
+ } // for x
+ } // for z
+ LinearUpscale2DArrayInPlace(TemperatureMap, 17, 17, 8, 8);
+ LinearUpscale2DArrayInPlace(HumidityMap, 17, 17, 8, 8);
+
+ // Re-map into integral values in [0 .. 255] range:
+ for (int idx = 0; idx < ARRAYCOUNT(a_TemperatureMap); idx++)
+ {
+ a_TemperatureMap[idx] = std::max(0, std::min(255, (int)(128 + TemperatureMap[idx] * 128)));
+ a_HumidityMap[idx] = std::max(0, std::min(255, (int)(128 + HumidityMap[idx] * 128)));
+ }
+}
+
+
+
+
+
+void cBioGenMultiStepMap::DecideLandBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap, const IntMap & a_HumidityMap)
+{
+ static const EMCSBiome BiomeMap[] =
+ {
+ // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+ /* 0 */ biTundra, biTundra, biTundra, biTundra, biPlains, biPlains, biPlains, biPlains, biPlains, biPlains, biDesert, biDesert, biDesert, biDesert, biDesert, biDesert,
+ /* 1 */ biTundra, biTundra, biTundra, biTundra, biPlains, biPlains, biPlains, biPlains, biPlains, biPlains, biDesert, biDesert, biDesert, biDesert, biDesert, biDesert,
+ /* 2 */ biTundra, biTundra, biTundra, biTundra, biPlains, biExtremeHills, biPlains, biPlains, biPlains, biPlains, biDesert, biDesert, biDesertHills, biDesertHills, biDesert, biDesert,
+ /* 3 */ biTundra, biTundra, biTundra, biTundra, biExtremeHills, biExtremeHills, biPlains, biPlains, biPlains, biPlains, biDesert, biDesert, biDesertHills, biDesertHills, biDesert, biDesert,
+ /* 4 */ biTundra, biTundra, biIceMountains, biIceMountains, biExtremeHills, biExtremeHills, biPlains, biPlains, biPlains, biPlains, biForestHills, biForestHills, biExtremeHills, biExtremeHills, biDesertHills, biDesert,
+ /* 5 */ biTundra, biTundra, biIceMountains, biIceMountains, biExtremeHills, biExtremeHills, biPlains, biPlains, biPlains, biPlains, biForestHills, biForestHills, biExtremeHills, biExtremeHills, biDesertHills, biDesert,
+ /* 6 */ biTundra, biTundra, biIceMountains, biIceMountains, biForestHills, biForestHills, biForest, biForest, biForest, biForest, biForest, biForestHills, biExtremeHills, biExtremeHills, biPlains, biPlains,
+ /* 7 */ biTundra, biTundra, biIceMountains, biIceMountains, biForestHills, biForestHills, biForest, biForest, biForest, biForest, biForest, biForestHills, biExtremeHills, biExtremeHills, biPlains, biPlains,
+ /* 8 */ biTundra, biTundra, biTaiga, biTaiga, biForest, biForest, biForest, biForest, biForest, biForest, biForest, biForestHills, biExtremeHills, biExtremeHills, biPlains, biPlains,
+ /* 9 */ biTundra, biTundra, biTaiga, biTaiga, biForest, biForest, biForest, biForest, biForest, biForest, biForest, biForestHills, biExtremeHills, biExtremeHills, biPlains, biPlains,
+ /* 10 */ biTaiga, biTaiga, biTaiga, biIceMountains, biForestHills, biForestHills, biForest, biForest, biForest, biForest, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ /* 11 */ biTaiga, biTaiga, biIceMountains, biIceMountains, biExtremeHills, biForestHills, biForest, biForest, biForest, biForest, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ /* 12 */ biTaiga, biTaiga, biIceMountains, biIceMountains, biExtremeHills, biJungleHills, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ /* 13 */ biTaiga, biTaiga, biTaiga, biIceMountains, biJungleHills, biJungleHills, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ /* 14 */ biTaiga, biTaiga, biTaiga, biTaiga, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ /* 15 */ biTaiga, biTaiga, biTaiga, biTaiga, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biJungle, biSwampland, biSwampland, biSwampland, biSwampland,
+ } ;
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ int idxZ = 17 * z;
+ for (int x = 0; x < cChunkDef::Width; x++)
+ {
+ if (cChunkDef::GetBiome(a_BiomeMap, x, z) != -1)
+ {
+ // Already set before
+ continue;
+ }
+ int idx = idxZ + x;
+ int Temperature = a_TemperatureMap[idx] / 16; // -> [0..15] range
+ int Humidity = a_HumidityMap[idx] / 16; // -> [0..15] range
+ cChunkDef::SetBiome(a_BiomeMap, x, z, BiomeMap[Temperature + 16 * Humidity]);
+ } // for x
+ } // for z
+}
+
+
+
+
+
+void cBioGenMultiStepMap::FreezeWaterBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap)
+{
+ int idx = 0;
+ for (int z = 0; z < cChunkDef::Width; z++)
+ {
+ for (int x = 0; x < cChunkDef::Width; x++, idx++)
+ {
+ if (a_TemperatureMap[idx] > 4 * 16)
+ {
+ // Not frozen
+ continue;
+ }
+ switch (cChunkDef::GetBiome(a_BiomeMap, x, z))
+ {
+ case biRiver: cChunkDef::SetBiome(a_BiomeMap, x, z, biFrozenRiver); break;
+ case biOcean: cChunkDef::SetBiome(a_BiomeMap, x, z, biFrozenOcean); break;
+ }
+ } // for x
+ idx += 1;
+ } // for z
+}
+
+
+
+