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Diffstat (limited to 'src/Generating/HeiGen.cpp')
| -rw-r--r-- | src/Generating/HeiGen.cpp | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/src/Generating/HeiGen.cpp b/src/Generating/HeiGen.cpp new file mode 100644 index 000000000..ea6051371 --- /dev/null +++ b/src/Generating/HeiGen.cpp @@ -0,0 +1,458 @@ + +// HeiGen.cpp + +// Implements the various terrain height generators + +#include "Globals.h" +#include "HeiGen.h" +#include "../LinearUpscale.h" +#include "inifile/iniFile.h" + + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cHeiGenFlat: + +void cHeiGenFlat::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) +{ + for (int 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(cTerrainHeightGen & 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; + delete[] m_CacheOrder; +} + + + + + +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) +{ +} + + + + + +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); +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// 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 */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // 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(Height, 17, 17, STEPX, STEPZ); + + // 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 (int 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; +} + + + + + |