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Diffstat (limited to 'src/Generating/DistortedHeightmap.cpp')
| -rw-r--r-- | src/Generating/DistortedHeightmap.cpp | 898 |
1 files changed, 898 insertions, 0 deletions
diff --git a/src/Generating/DistortedHeightmap.cpp b/src/Generating/DistortedHeightmap.cpp new file mode 100644 index 000000000..a61d79bec --- /dev/null +++ b/src/Generating/DistortedHeightmap.cpp @@ -0,0 +1,898 @@ + +// DistortedHeightmap.cpp + +// Implements the cDistortedHeightmap class representing the height and composition generator capable of overhangs + +#include "Globals.h" + +#include "DistortedHeightmap.h" +#include "../OSSupport/File.h" +#include "inifile/iniFile.h" +#include "../LinearUpscale.h" + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cPattern: + +/// This class is used to store a column pattern initialized at runtime, +/// so that the program doesn't need to explicitly set 256 values for each pattern +/// Each pattern has 256 blocks so that there's no need to check pattern bounds when assigning the +/// pattern - there will always be enough pattern left, even for the whole chunk height +class cPattern +{ +public: + cPattern(cDistortedHeightmap::sBlockInfo * a_TopBlocks, size_t a_Count) + { + // Copy the pattern into the top: + for (size_t i = 0; i < a_Count; i++) + { + m_Pattern[i] = a_TopBlocks[i]; + } + + // Fill the rest with stone: + static cDistortedHeightmap::sBlockInfo Stone = {E_BLOCK_STONE, 0}; + for (size_t i = a_Count; i < cChunkDef::Height; i++) + { + m_Pattern[i] = Stone; + } + } + + const cDistortedHeightmap::sBlockInfo * Get(void) const { return m_Pattern; } + +protected: + cDistortedHeightmap::sBlockInfo m_Pattern[cChunkDef::Height]; +} ; + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// The arrays to use for the top block pattern definitions: + +static cDistortedHeightmap::sBlockInfo tbGrass[] = +{ + {E_BLOCK_GRASS, 0}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, +} ; + +static cDistortedHeightmap::sBlockInfo tbSand[] = +{ + { E_BLOCK_SAND, 0}, + { E_BLOCK_SAND, 0}, + { E_BLOCK_SAND, 0}, + { E_BLOCK_SANDSTONE, 0}, +} ; + +static cDistortedHeightmap::sBlockInfo tbDirt[] = +{ + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, +} ; + +static cDistortedHeightmap::sBlockInfo tbPodzol[] = +{ + {E_BLOCK_DIRT, E_META_DIRT_PODZOL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, +} ; + +static cDistortedHeightmap::sBlockInfo tbGrassLess[] = +{ + {E_BLOCK_DIRT, E_META_DIRT_GRASSLESS}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, + {E_BLOCK_DIRT, E_META_DIRT_NORMAL}, +} ; + +static cDistortedHeightmap::sBlockInfo tbMycelium[] = +{ + {E_BLOCK_MYCELIUM, 0}, + {E_BLOCK_DIRT, 0}, + {E_BLOCK_DIRT, 0}, + {E_BLOCK_DIRT, 0}, +} ; + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// Ocean floor pattern top-block definitions: + +static cDistortedHeightmap::sBlockInfo tbOFSand[] = +{ + {E_BLOCK_SAND, 0}, + {E_BLOCK_SAND, 0}, + {E_BLOCK_SAND, 0}, + {E_BLOCK_SANDSTONE, 0} +} ; + +static cDistortedHeightmap::sBlockInfo tbOFClay[] = +{ + { E_BLOCK_CLAY, 0}, + { E_BLOCK_CLAY, 0}, + { E_BLOCK_SAND, 0}, + { E_BLOCK_SAND, 0}, +} ; + +static cDistortedHeightmap::sBlockInfo tbOFRedSand[] = +{ + { E_BLOCK_SAND, E_META_SAND_RED}, + { E_BLOCK_SAND, E_META_SAND_RED}, + { E_BLOCK_SAND, E_META_SAND_RED}, + { E_BLOCK_SANDSTONE, 0}, +} ; + + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// Individual patterns to use: + +static cPattern patGrass (tbGrass, ARRAYCOUNT(tbGrass)); +static cPattern patSand (tbSand, ARRAYCOUNT(tbSand)); +static cPattern patDirt (tbDirt, ARRAYCOUNT(tbDirt)); +static cPattern patPodzol (tbPodzol, ARRAYCOUNT(tbPodzol)); +static cPattern patGrassLess(tbGrassLess, ARRAYCOUNT(tbGrassLess)); +static cPattern patMycelium (tbMycelium, ARRAYCOUNT(tbMycelium)); + +static cPattern patOFSand (tbOFSand, ARRAYCOUNT(tbOFSand)); +static cPattern patOFClay (tbOFClay, ARRAYCOUNT(tbOFClay)); +static cPattern patOFRedSand(tbOFRedSand, ARRAYCOUNT(tbOFRedSand)); + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cDistortedHeightmap: + +/** This table assigns a relative maximum overhang size in each direction to biomes. +Both numbers indicate a number which will multiply the noise value for each coord; +this means that you can have different-sized overhangs in each direction. +Usually you'd want to keep both numbers the same. +The numbers are "relative", not absolute maximum; overhangs of a slightly larger size are possible +due to the way that noise is calculated. +*/ +const cDistortedHeightmap::sGenParam cDistortedHeightmap::m_GenParam[256] = +{ + /* Biome | AmpX | AmpZ */ + /* biOcean */ { 1.5f, 1.5f}, + /* biPlains */ { 0.5f, 0.5f}, + /* biDesert */ { 0.5f, 0.5f}, + /* biExtremeHills */ {16.0f, 16.0f}, + /* biForest */ { 3.0f, 3.0f}, + /* biTaiga */ { 1.5f, 1.5f}, + + /* biSwampland */ { 0.0f, 0.0f}, + /* biRiver */ { 0.0f, 0.0f}, + /* biNether */ { 0.0f, 0.0f}, // Unused, but must be here due to indexing + /* biSky */ { 0.0f, 0.0f}, // Unused, but must be here due to indexing + /* biFrozenOcean */ { 0.0f, 0.0f}, + /* biFrozenRiver */ { 0.0f, 0.0f}, + /* biIcePlains */ { 0.0f, 0.0f}, + /* biIceMountains */ { 8.0f, 8.0f}, + /* biMushroomIsland */ { 4.0f, 4.0f}, + /* biMushroomShore */ { 0.0f, 0.0f}, + /* biBeach */ { 0.0f, 0.0f}, + /* biDesertHills */ { 5.0f, 5.0f}, + /* biForestHills */ { 6.0f, 6.0f}, + /* biTaigaHills */ { 8.0f, 8.0f}, + /* biExtremeHillsEdge */ { 7.0f, 7.0f}, + /* biJungle */ { 4.0f, 4.0f}, + /* biJungleHills */ { 8.0f, 8.0f}, + /* biJungleEdge */ { 3.0f, 3.0f}, // 23 + /* biDeepOcean */ { 1.0f, 1.0f}, // 24 + /* biStoneBeach */ { 1.0f, 1.0f}, // 25 + /* biColdBeach */ { 1.0f, 1.0f}, // 26 + /* biBirchForest */ { 3.0f, 3.0f}, // 27 + /* biBirchForestHills */ { 6.0f, 6.0f}, // 28 + /* biRoofedForest */ { 3.0f, 3.0f}, // 29 + /* biColdTaiga */ { 0.5f, 0.5f}, // 30 + /* biColdTaigaHills */ { 4.0f, 4.0f}, // 31 + /* biMegaTaiga */ { 1.0f, 1.0f}, // 32 + /* biMegaTaigaHills */ { 4.0f, 4.0f}, // 33 + /* biExtremeHillsPlus */ {32.0f, 32.0f}, // 34 - anyone say extreme plus? Make it extreme plus, then :) + /* biSavanna */ { 2.0f, 2.0f}, // 35 + /* biSavannaPlateau */ { 3.0f, 3.0f}, // 36 + /* biMesa */ { 2.0f, 2.0f}, // 37 + /* biMesaPlateauF */ { 2.0f, 2.0f}, // 38 + /* biMesaPlateau */ { 2.0f, 2.0f}, // 39 + + // 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 + + // Release 1.7 /* biome variants: + /* biSunflowerPlains */ { 1.0f, 1.0f}, // 129 + /* biDesertM */ { 1.0f, 1.0f}, // 130 + /* biExtremeHillsM */ {16.0f, 16.0f}, // 131 + /* biFlowerForest */ { 4.0f, 4.0f}, // 132 + /* biTaigaM */ { 3.0f, 3.0f}, // 133 + /* biSwamplandM */ { 0.0f, 0.0f}, // 134 + + // Biomes 135 .. 139 unused, 5 empty placeholders here: + {}, {}, {}, {}, {}, // 135 .. 139 + + /* biIcePlainsSpikes */ { 1.0f, 1.0f}, // 140 + + // Biomes 141 .. 148 unused, 8 empty placeholders here: + {}, {}, {}, {}, {}, {}, {}, {}, // 141 .. 148 + + /* biJungleM */ { 4.0f, 4.0f}, // 149 + {}, // 150 + /* biJungleEdgeM */ { 3.0f, 3.0f}, // 151 + {}, {}, {}, // 152 .. 154 + /* biBirchForestM */ { 3.0f, 3.0f}, // 155 + /* biBirchForestHillsM */ { 5.0f, 5.0f}, // 156 + /* biRoofedForestM */ { 2.0f, 2.0f}, // 157 + /* biColdTaigaM */ { 1.0f, 1.0f}, // 158 + {}, // 159 + /* biMegaSpruceTaiga */ { 3.0f, 3.0f}, // 160 + /* biMegaSpruceTaigaHills */ { 3.0f, 3.0f}, // 161 + /* biExtremeHillsPlusM */ {32.0f, 32.0f}, // 162 + /* biSavannaM */ { 2.0f, 2.0f}, // 163 + /* biSavannaPlateauM */ { 3.0f, 3.0f}, // 164 + /* biMesaBryce */ { 0.5f, 0.5f}, // 165 + /* biMesaPlateauFM */ { 2.0f, 2.0f}, // 166 + /* biMesaPlateauM */ { 2.0f, 2.0f}, // 167 +} ; + + + + + +cDistortedHeightmap::cDistortedHeightmap(int a_Seed, cBiomeGen & a_BiomeGen) : + m_NoiseDistortX(a_Seed + 1000), + m_NoiseDistortZ(a_Seed + 2000), + m_OceanFloorSelect(a_Seed + 3000), + m_MesaFloor(a_Seed + 4000), + m_BiomeGen(a_BiomeGen), + m_UnderlyingHeiGen(a_Seed, a_BiomeGen), + m_HeightGen(m_UnderlyingHeiGen, 64), + m_IsInitialized(false) +{ + m_NoiseDistortX.AddOctave((NOISE_DATATYPE)1, (NOISE_DATATYPE)0.5); + m_NoiseDistortX.AddOctave((NOISE_DATATYPE)0.5, (NOISE_DATATYPE)1); + m_NoiseDistortX.AddOctave((NOISE_DATATYPE)0.25, (NOISE_DATATYPE)2); + + m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)1, (NOISE_DATATYPE)0.5); + m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)0.5, (NOISE_DATATYPE)1); + m_NoiseDistortZ.AddOctave((NOISE_DATATYPE)0.25, (NOISE_DATATYPE)2); + + InitMesaPattern(a_Seed); +} + + + + + +void cDistortedHeightmap::Initialize(cIniFile & a_IniFile) +{ + if (m_IsInitialized) + { + return; + } + + // Read the params from the INI file: + m_SeaLevel = a_IniFile.GetValueSetI("Generator", "DistortedHeightmapSeaLevel", 62); + m_FrequencyX = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyX", 10); + m_FrequencyY = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyY", 10); + m_FrequencyZ = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "DistortedHeightmapFrequencyZ", 10); + + m_IsInitialized = true; +} + + + + + +void cDistortedHeightmap::InitMesaPattern(int a_Seed) +{ + // Stone in the bottom half of the pattern: + for (int i = cChunkDef::Height; i < 2 * cChunkDef::Height; i++) + { + m_MesaPattern[i].BlockMeta = 0; + m_MesaPattern[i].BlockType = E_BLOCK_STONE; + } + + // Stained and hardened clay in the top half of the pattern + // In a loop, choose whether to use one or two layers of stained clay, then choose a color and width for each layer + // Separate each group with another layer of hardened clay + cNoise PatternNoise((unsigned)a_Seed); + static NIBBLETYPE AllowedColors[] = + { + E_META_STAINED_CLAY_YELLOW, + E_META_STAINED_CLAY_YELLOW, + E_META_STAINED_CLAY_RED, + E_META_STAINED_CLAY_RED, + E_META_STAINED_CLAY_WHITE, + E_META_STAINED_CLAY_BROWN, + E_META_STAINED_CLAY_BROWN, + E_META_STAINED_CLAY_BROWN, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_ORANGE, + E_META_STAINED_CLAY_LIGHTGRAY, + } ; + static int LayerSizes[] = // Adjust the chance so that thinner layers occur more commonly + { + 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, + 3, 3, + } ; + int Idx = cChunkDef::Height - 1; + while (Idx >= 0) + { + // A layer group of 1 - 2 color stained clay: + int Random = PatternNoise.IntNoise1DInt(Idx) / 7; + int NumLayers = (Random % 2) + 1; + Random /= 2; + for (int Lay = 0; Lay < NumLayers; Lay++) + { + int NumBlocks = LayerSizes[(Random % ARRAYCOUNT(LayerSizes))]; + NIBBLETYPE Color = AllowedColors[(Random / 4) % ARRAYCOUNT(AllowedColors)]; + if ( + ((NumBlocks == 3) && (NumLayers == 2)) || // In two-layer mode disallow the 3-high layers: + (Color == E_META_STAINED_CLAY_WHITE)) // White stained clay can ever be only 1 block high + { + NumBlocks = 1; + } + NumBlocks = std::min(Idx + 1, NumBlocks); // Limit by Idx so that we don't have to check inside the loop + Random /= 32; + for (int Block = 0; Block < NumBlocks; Block++, Idx--) + { + m_MesaPattern[Idx].BlockMeta = Color; + m_MesaPattern[Idx].BlockType = E_BLOCK_STAINED_CLAY; + } // for Block + } // for Lay + + // A layer of hardened clay in between the layer group: + int NumBlocks = (Random % 4) + 1; // All heights the same probability + if ((NumLayers == 2) && (NumBlocks < 4)) + { + // For two layers of stained clay, add an extra block of hardened clay: + NumBlocks++; + } + NumBlocks = std::min(Idx + 1, NumBlocks); // Limit by Idx so that we don't have to check inside the loop + for (int Block = 0; Block < NumBlocks; Block++, Idx--) + { + m_MesaPattern[Idx].BlockMeta = 0; + m_MesaPattern[Idx].BlockType = E_BLOCK_HARDENED_CLAY; + } // for Block + } // while (Idx >= 0) +} + + + + + +void cDistortedHeightmap::PrepareState(int a_ChunkX, int a_ChunkZ) +{ + if ((m_CurChunkX == a_ChunkX) && (m_CurChunkZ == a_ChunkZ)) + { + return; + } + m_CurChunkX = a_ChunkX; + m_CurChunkZ = a_ChunkZ; + + + m_HeightGen.GenHeightMap(a_ChunkX, a_ChunkZ, m_CurChunkHeights); + UpdateDistortAmps(); + GenerateHeightArray(); +} + + + + + +void cDistortedHeightmap::GenerateHeightArray(void) +{ + // Generate distortion noise: + NOISE_DATATYPE DistortNoiseX[DIM_X * DIM_Y * DIM_Z]; + NOISE_DATATYPE DistortNoiseZ[DIM_X * DIM_Y * DIM_Z]; + NOISE_DATATYPE Workspace[DIM_X * DIM_Y * DIM_Z]; + NOISE_DATATYPE StartX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width)) / m_FrequencyX; + NOISE_DATATYPE EndX = ((NOISE_DATATYPE)((m_CurChunkX + 1) * cChunkDef::Width - 1)) / m_FrequencyX; + NOISE_DATATYPE StartY = 0; + NOISE_DATATYPE EndY = ((NOISE_DATATYPE)(257)) / m_FrequencyY; + NOISE_DATATYPE StartZ = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width)) / m_FrequencyZ; + NOISE_DATATYPE EndZ = ((NOISE_DATATYPE)((m_CurChunkZ + 1) * cChunkDef::Width - 1)) / m_FrequencyZ; + + m_NoiseDistortX.Generate3D(DistortNoiseX, DIM_X, DIM_Y, DIM_Z, StartX, EndX, StartY, EndY, StartZ, EndZ, Workspace); + m_NoiseDistortZ.Generate3D(DistortNoiseZ, DIM_X, DIM_Y, DIM_Z, StartX, EndX, StartY, EndY, StartZ, EndZ, Workspace); + + // The distorted heightmap, before linear upscaling + NOISE_DATATYPE DistHei[DIM_X * DIM_Y * DIM_Z]; + + // Distort the heightmap using the distortion: + for (int z = 0; z < DIM_Z; z++) + { + int AmpIdx = z * DIM_X; + for (int y = 0; y < DIM_Y; y++) + { + int NoiseArrayIdx = z * DIM_X * DIM_Y + y * DIM_X; + for (int x = 0; x < DIM_X; x++) + { + NOISE_DATATYPE DistX = DistortNoiseX[NoiseArrayIdx + x] * m_DistortAmpX[AmpIdx + x]; + NOISE_DATATYPE DistZ = DistortNoiseZ[NoiseArrayIdx + x] * m_DistortAmpZ[AmpIdx + x]; + DistX += (NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + x * INTERPOL_X); + DistZ += (NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + z * INTERPOL_Z); + // Adding 0.5 helps alleviate the interpolation artifacts + DistHei[NoiseArrayIdx + x] = (NOISE_DATATYPE)GetHeightmapAt(DistX, DistZ) + (NOISE_DATATYPE)0.5; + } + } + } + + // Upscale the distorted heightmap into full dimensions: + LinearUpscale3DArray( + DistHei, DIM_X, DIM_Y, DIM_Z, + m_DistortedHeightmap, INTERPOL_X, INTERPOL_Y, INTERPOL_Z + ); + + // DEBUG: Debug3DNoise(m_DistortedHeightmap, 17, 257, 17, Printf("DistortedHeightmap_%d_%d", m_CurChunkX, m_CurChunkZ)); +} + + + + + +void cDistortedHeightmap::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) +{ + PrepareState(a_ChunkX, a_ChunkZ); + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int x = 0; x < cChunkDef::Width; x++) + { + int NoiseArrayIdx = x + 17 * 257 * z; + cChunkDef::SetHeight(a_HeightMap, x, z, m_SeaLevel - 1); + for (int y = cChunkDef::Height - 1; y > m_SeaLevel - 1; y--) + { + int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y]; + if (y < HeightMapHeight) + { + cChunkDef::SetHeight(a_HeightMap, x, z, y); + break; + } + } // for y + } // for x + } // for z +} + + + + + +void cDistortedHeightmap::InitializeHeightGen(cIniFile & a_IniFile) +{ + Initialize(a_IniFile); +} + + + + + +void cDistortedHeightmap::ComposeTerrain(cChunkDesc & a_ChunkDesc) +{ + // Prepare the internal state for generating this chunk: + PrepareState(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ()); + + // Compose: + a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0); + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int x = 0; x < cChunkDef::Width; x++) + { + ComposeColumn(a_ChunkDesc, x, z); + } // for x + } // for z +} + + + + + +void cDistortedHeightmap::InitializeCompoGen(cIniFile & a_IniFile) +{ + Initialize(a_IniFile); +} + + + + + +int cDistortedHeightmap::GetHeightmapAt(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Z) +{ + int ChunkX = (int)floor(a_X / (NOISE_DATATYPE)16); + int ChunkZ = (int)floor(a_Z / (NOISE_DATATYPE)16); + int RelX = (int)(a_X - (NOISE_DATATYPE)ChunkX * cChunkDef::Width); + int RelZ = (int)(a_Z - (NOISE_DATATYPE)ChunkZ * cChunkDef::Width); + + // If we're withing the same chunk, return the pre-cached heightmap: + if ((ChunkX == m_CurChunkX) && (ChunkZ == m_CurChunkZ)) + { + return cChunkDef::GetHeight(m_CurChunkHeights, RelX, RelZ); + } + + // Ask the cache: + HEIGHTTYPE res = 0; + if (m_HeightGen.GetHeightAt(ChunkX, ChunkZ, RelX, RelZ, res)) + { + // The height was in the cache + return res; + } + + // The height is not in the cache, generate full heightmap and get it there: + cChunkDef::HeightMap Heightmap; + m_HeightGen.GenHeightMap(ChunkX, ChunkZ, Heightmap); + return cChunkDef::GetHeight(Heightmap, RelX, RelZ); +} + + + + + +void cDistortedHeightmap::UpdateDistortAmps(void) +{ + BiomeNeighbors Biomes; + for (int z = -1; z <= 1; z++) + { + for (int x = -1; x <= 1; x++) + { + m_BiomeGen.GenBiomes(m_CurChunkX + x, m_CurChunkZ + z, Biomes[x + 1][z + 1]); + } // for x + } // for z + + for (int z = 0; z < DIM_Z; z++) + { + for (int x = 0; x < DIM_Z; x++) + { + GetDistortAmpsAt(Biomes, x * INTERPOL_X, z * INTERPOL_Z, m_DistortAmpX[x + DIM_X * z], m_DistortAmpZ[x + DIM_X * z]); + } + } +} + + + + + +void cDistortedHeightmap::GetDistortAmpsAt(BiomeNeighbors & a_Neighbors, int a_RelX, int a_RelZ, NOISE_DATATYPE & a_DistortAmpX, NOISE_DATATYPE & a_DistortAmpZ) +{ + // 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_Neighbors[IdxX][IdxZ], ModX, ModZ); + int WeightX = 9 - abs(x); + BiomeCounts[Biome] += WeightX + WeightZ; + Sum += WeightX + WeightZ; + } // for x + } // for z + + if (Sum <= 0) + { + // No known biome around? Weird. Return a bogus value: + ASSERT(!"cHeiGenBiomal: Biome sum failed, no known biome around"); + a_DistortAmpX = 16; + a_DistortAmpZ = 16; + } + + // For each biome type that has a nonzero count, calc its amps and add it: + NOISE_DATATYPE AmpX = 0; + NOISE_DATATYPE AmpZ = 0; + for (unsigned 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_DistortAmpX >= 0); + ASSERT(m_GenParam[i].m_DistortAmpX < 100); + ASSERT(m_GenParam[i].m_DistortAmpX >= 0); + ASSERT(m_GenParam[i].m_DistortAmpX < 100); + */ + + AmpX += BiomeCounts[i] * m_GenParam[i].m_DistortAmpX; + AmpZ += BiomeCounts[i] * m_GenParam[i].m_DistortAmpZ; + } + a_DistortAmpX = AmpX / Sum; + a_DistortAmpZ = AmpZ / Sum; +} + + + + +void cDistortedHeightmap::ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ) +{ + // Frequencies for the podzol floor selecting noise: + const NOISE_DATATYPE FrequencyX = 8; + const NOISE_DATATYPE FrequencyZ = 8; + + EMCSBiome Biome = a_ChunkDesc.GetBiome(a_RelX, a_RelZ); + switch (Biome) + { + case biOcean: + case biPlains: + case biExtremeHills: + case biForest: + case biTaiga: + case biSwampland: + case biRiver: + case biFrozenOcean: + case biFrozenRiver: + case biIcePlains: + case biIceMountains: + case biForestHills: + case biTaigaHills: + case biExtremeHillsEdge: + case biJungle: + case biJungleHills: + case biJungleEdge: + case biDeepOcean: + case biStoneBeach: + case biColdBeach: + case biBirchForest: + case biBirchForestHills: + case biRoofedForest: + case biColdTaiga: + case biColdTaigaHills: + case biExtremeHillsPlus: + case biSavanna: + case biSavannaPlateau: + case biSunflowerPlains: + case biExtremeHillsM: + case biFlowerForest: + case biTaigaM: + case biSwamplandM: + case biIcePlainsSpikes: + case biJungleM: + case biJungleEdgeM: + case biBirchForestM: + case biBirchForestHillsM: + case biRoofedForestM: + case biColdTaigaM: + case biExtremeHillsPlusM: + case biSavannaM: + case biSavannaPlateauM: + { + FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patGrass.Get()); + return; + } + + case biMegaTaiga: + case biMegaTaigaHills: + case biMegaSpruceTaiga: + case biMegaSpruceTaigaHills: + { + // Select the pattern to use - podzol, grass or grassless dirt: + NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX; + NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ; + NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY); + const sBlockInfo * Pattern = (Val < -0.9) ? patGrassLess.Get() : ((Val > 0) ? patPodzol.Get() : patGrass.Get()); + FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern); + return; + } + + case biDesertHills: + case biDesert: + case biDesertM: + case biBeach: + { + FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patSand.Get()); + return; + } + + case biMushroomIsland: + case biMushroomShore: + { + FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patMycelium.Get()); + return; + } + + case biMesa: + case biMesaPlateauF: + case biMesaPlateau: + case biMesaBryce: + case biMesaPlateauFM: + case biMesaPlateauM: + { + // Mesa biomes need special handling, because they don't follow the usual "4 blocks from top pattern", + // instead, they provide a "from bottom" pattern with varying base height, + // usually 4 blocks below the ocean level + FillColumnMesa(a_ChunkDesc, a_RelX, a_RelZ); + return; + } + + } // switch (Biome) + ASSERT(!"Unhandled biome"); +} + + + + + +void cDistortedHeightmap::FillColumnPattern(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const sBlockInfo * a_Pattern) +{ + int NoiseArrayIdx = a_RelX + 17 * 257 * a_RelZ; + bool HasHadWater = false; + int PatternIdx = 0; + for (int y = a_ChunkDesc.GetHeight(a_RelX, a_RelZ); y > 0; y--) + { + int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y]; + + if (y < HeightMapHeight) + { + // "ground" part, use the pattern: + a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, a_Pattern[PatternIdx].BlockType, a_Pattern[PatternIdx].BlockMeta); + PatternIdx++; + continue; + } + + // "air" or "water" part: + // Reset the pattern index to zero, so that the pattern is repeated from the top again: + PatternIdx = 0; + + if (y >= m_SeaLevel) + { + // "air" part, do nothing + continue; + } + + a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER); + if (HasHadWater) + { + continue; + } + + // Select the ocean-floor pattern to use: + a_Pattern = ChooseOceanFloorPattern(a_RelX, a_RelZ); + HasHadWater = true; + } // for y + a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK); +} + + + + + +void cDistortedHeightmap::FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ) +{ + // Frequencies for the clay floor noise: + const NOISE_DATATYPE FrequencyX = 50; + const NOISE_DATATYPE FrequencyZ = 50; + + int Top = a_ChunkDesc.GetHeight(a_RelX, a_RelZ); + if (Top < m_SeaLevel) + { + // The terrain is below sealevel, handle as regular ocean: + FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patOFRedSand.Get()); + return; + } + + NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX; + NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ; + int ClayFloor = m_SeaLevel - 6 + (int)(4.f * m_MesaFloor.CubicNoise2D(NoiseX, NoiseY)); + if (ClayFloor >= Top) + { + ClayFloor = Top - 1; + } + + if (Top - m_SeaLevel < 5) + { + // Simple case: top is red sand, then hardened clay down to ClayFloor, then stone: + a_ChunkDesc.SetBlockTypeMeta(a_RelX, Top, a_RelZ, E_BLOCK_SAND, E_META_SAND_RED); + for (int y = Top - 1; y >= ClayFloor; y--) + { + a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_HARDENED_CLAY); + } + for (int y = ClayFloor - 1; y > 0; y--) + { + a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STONE); + } + a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK); + return; + } + + // Difficult case: use the mesa pattern and watch for overhangs: + int NoiseArrayIdx = a_RelX + 17 * 257 * a_RelZ; + int PatternIdx = cChunkDef::Height - (Top - ClayFloor); // We want the block at index ClayFloor to be pattern's 256th block (first stone) + const sBlockInfo * Pattern = m_MesaPattern; + bool HasHadWater = false; + for (int y = Top; y > 0; y--) + { + int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y]; + if (y < HeightMapHeight) + { + // "ground" part, use the pattern: + a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, Pattern[PatternIdx].BlockType, Pattern[PatternIdx].BlockMeta); + PatternIdx++; + continue; + } + + if (y >= m_SeaLevel) + { + // "air" part, do nothing + continue; + } + + // "water" part, fill with water and choose new pattern for ocean floor, if not chosen already: + PatternIdx = 0; + a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER); + if (HasHadWater) + { + continue; + } + + // Select the ocean-floor pattern to use: + Pattern = ChooseOceanFloorPattern(a_RelX, a_RelZ); + HasHadWater = true; + } // for y + a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK); +} + + + + + +const cDistortedHeightmap::sBlockInfo * cDistortedHeightmap::ChooseOceanFloorPattern(int a_RelX, int a_RelZ) +{ + // Frequencies for the ocean floor selecting noise: + const NOISE_DATATYPE FrequencyX = 3; + const NOISE_DATATYPE FrequencyZ = 3; + + // Select the ocean-floor pattern to use: + NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + a_RelX)) / FrequencyX; + NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ; + NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY); + if (Val < -0.95) + { + return patOFClay.Get(); + } + else if (Val < 0) + { + return patOFSand.Get(); + } + else + { + return patDirt.Get(); + } +} + + + + |