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Diffstat (limited to 'source/Generating/HeiGen.cpp')
| -rw-r--r-- | source/Generating/HeiGen.cpp | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/source/Generating/HeiGen.cpp b/source/Generating/HeiGen.cpp new file mode 100644 index 000000000..ed353751c --- /dev/null +++ b/source/Generating/HeiGen.cpp @@ -0,0 +1,302 @@ + +// HeiGen.cpp + +// Implements the various terrain height generators + +#include "Globals.h" +#include "HeiGen.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; + } +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// 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; + delete m_HeiGenToCache; +} + + + + + +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; +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cHeiGenClassic: + +cHeiGenClassic::cHeiGenClassic(int a_Seed, float a_HeightFreq1, float a_HeightAmp1, float a_HeightFreq2, float a_HeightAmp2, float a_HeightFreq3, float a_HeightAmp3) : + m_Seed(a_Seed), + m_Noise(a_Seed), + m_HeightFreq1(a_HeightFreq1), + m_HeightAmp1 (a_HeightAmp1), + m_HeightFreq2(a_HeightFreq2), + m_HeightAmp2 (a_HeightAmp2), + m_HeightFreq3(a_HeightFreq3), + m_HeightAmp3 (a_HeightAmp3) +{ + // Nothing needed yet +} + + + + + +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 +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cHeiGenBiomal: + +const cHeiGenBiomal::sGenParam cHeiGenBiomal::m_GenParam[biNumBiomes] = +{ + /* Fast-changing | Middle-changing | Slow-changing |*/ + /* Biome | Freq1 | Amp1 | Freq2 | Amp2 | Freq3 | Amp3 | BaseHeight */ + /* biOcean */ { 0.1f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 40}, // done + /* biPlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done + /* biDesert */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done + /* biExtremeHills */ { 0.2f, 4.0f, 0.05f, 20.0f, 0.01f, 16.0f, 100}, // done + /* biForest */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // done + /* biTaiga */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 70}, // done + /* biSwampland */ { 0.1f, 1.1f, 0.05f, 1.5f, 0.02f, 2.5f, 61.5}, // done + /* biRiver */ { 0.2f, 3.0f, 0.05f, 1.0f, 0.01f, 1.0f, 56}, // done + /* 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}, // done + /* biFrozenRiver */ { 0.2f, 3.0f, 0.05f, 1.0f, 0.01f, 1.0f, 56}, // done + /* biIcePlains */ { 0.1f, 1.0f, 0.05f, 1.5f, 0.01f, 4.0f, 68}, // done + /* biIceMountains */ { 0.2f, 2.0f, 0.05f, 10.0f, 0.01f, 8.0f, 80}, // done + /* biMushroomIsland */ { 0.1f, 2.0f, 0.05f, 8.0f, 0.01f, 6.0f, 80}, // done + /* biMushroomShore */ { 0.1f, 1.0f, 0.05f, 2.0f, 0.01f, 4.0f, 64}, // done + /* biBeach */ { 0.1f, 0.5f, 0.05f, 1.0f, 0.01f, 1.0f, 64}, // done + /* biDesertHills */ { 0.2f, 2.0f, 0.05f, 5.0f, 0.01f, 4.0f, 75}, // done + /* biForestHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done + /* biTaigaHills */ { 0.2f, 2.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done + /* biExtremeHillsEdge */ { 0.2f, 3.0f, 0.05f, 16.0f, 0.01f, 12.0f, 80}, // done + /* biJungle */ { 0.1f, 3.0f, 0.05f, 6.0f, 0.01f, 6.0f, 70}, // done + /* biJungleHills */ { 0.2f, 3.0f, 0.05f, 12.0f, 0.01f, 10.0f, 80}, // done +} ; + + + + + +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 + + // 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 + } +} + + + + + +HEIGHTTYPE 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[biNumBiomes]; + 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); + if ((Biome < 0) || (Biome >= ARRAYCOUNT(BiomeCounts))) + { + continue; + } + 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) + { + int 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; + } + float oct1 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq1, BlockZ * m_GenParam[i].m_HeightFreq1) * m_GenParam[i].m_HeightAmp1; + float oct2 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq2, BlockZ * m_GenParam[i].m_HeightFreq2) * m_GenParam[i].m_HeightAmp2; + float oct3 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq3, BlockZ * m_GenParam[i].m_HeightFreq3) * m_GenParam[i].m_HeightAmp3; + Height += BiomeCounts[i] * (int)(m_GenParam[i].m_BaseHeight + oct1 + oct2 + oct3); + } + int res = (HEIGHTTYPE)(Height / Sum); + return std::min(250, std::max(res, 5)); + } + + // No known biome around? Weird. Return a bogus value: + ASSERT(!"cHeiGenBiomal: Biome sum failed, no known biome around"); + return 5; +} + + + + + |