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Diffstat (limited to 'source/Generating/DistortedHeightmap.cpp')
| -rw-r--r-- | source/Generating/DistortedHeightmap.cpp | 419 |
1 files changed, 0 insertions, 419 deletions
diff --git a/source/Generating/DistortedHeightmap.cpp b/source/Generating/DistortedHeightmap.cpp deleted file mode 100644 index 6ac4d61d5..000000000 --- a/source/Generating/DistortedHeightmap.cpp +++ /dev/null @@ -1,419 +0,0 @@ - -// 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" - - - - - -/** 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[biNumBiomes] = -{ - /* 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 */ { 0.0f, 0.0f}, - /* biJungleHills */ { 8.0f, 8.0f}, -} ; - - - - - -cDistortedHeightmap::cDistortedHeightmap(int a_Seed, cBiomeGen & a_BiomeGen) : - m_NoiseDistortX(a_Seed + 1000), - m_NoiseDistortZ(a_Seed + 2000), - m_OceanFloorSelect(a_Seed + 3000), - m_BiomeGen(a_BiomeGen), - m_UnderlyingHeiGen(a_Seed, a_BiomeGen), - m_HeightGen(&m_UnderlyingHeiGen, 64) -{ - 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); -} - - - - - -void cDistortedHeightmap::Initialize(cIniFile & a_IniFile) -{ - // 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); -} - - - - - -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::ComposeTerrain(cChunkDesc & a_ChunkDesc) -{ - // Frequencies for the ocean floor selecting noise: - NOISE_DATATYPE FrequencyX = 3; - NOISE_DATATYPE FrequencyZ = 3; - - // 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++) - { - int NoiseArrayIdx = x + 17 * 257 * z; - int LastAir = a_ChunkDesc.GetHeight(x, z) + 1; - bool HasHadWater = false; - for (int y = LastAir - 1; y > 0; y--) - { - int HeightMapHeight = (int)m_DistortedHeightmap[NoiseArrayIdx + 17 * y]; - - if (y >= HeightMapHeight) - { - // "air" part - LastAir = y; - if (y < m_SeaLevel) - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_STATIONARY_WATER); - HasHadWater = true; - } - continue; - } - // "ground" part: - if (y < LastAir - 4) - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_STONE); - continue; - } - if (HasHadWater) - { - // Decide between clay, sand and dirt - NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(m_CurChunkX * cChunkDef::Width + x)) / FrequencyX; - NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(m_CurChunkZ * cChunkDef::Width + z)) / FrequencyZ; - NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY); - if (Val < -0.95) - { - // Clay: - switch (LastAir - y) - { - case 0: - case 1: - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_CLAY); - break; - } - case 2: - case 3: - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_SAND); - break; - } - case 4: - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_SANDSTONE); - break; - } - } // switch (floor depth) - } - else if (Val < 0) - { - a_ChunkDesc.SetBlockType(x, y, z, (y < LastAir - 3) ? E_BLOCK_SANDSTONE : E_BLOCK_SAND); - } - else - { - a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_DIRT); - } - } - else - { - switch (a_ChunkDesc.GetBiome(x, z)) - { - 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: - { - a_ChunkDesc.SetBlockType(x, y, z, (y == LastAir - 1) ? E_BLOCK_GRASS : E_BLOCK_DIRT); - break; - } - case biDesertHills: - case biDesert: - case biBeach: - { - a_ChunkDesc.SetBlockType(x, y, z, (y < LastAir - 3) ? E_BLOCK_SANDSTONE : E_BLOCK_SAND); - break; - } - case biMushroomIsland: - case biMushroomShore: - { - a_ChunkDesc.SetBlockType(x, y, z, (y == LastAir - 1) ? E_BLOCK_MYCELIUM : E_BLOCK_DIRT); - break; - } - } - } - } // for y - a_ChunkDesc.SetBlockType(x, 0, z, E_BLOCK_BEDROCK); - } // for x - } // for z -} - - - - - -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[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_Neighbors[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 - - 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 (int i = 0; i < ARRAYCOUNT(BiomeCounts); i++) - { - AmpX += BiomeCounts[i] * m_GenParam[i].m_DistortAmpX; - AmpZ += BiomeCounts[i] * m_GenParam[i].m_DistortAmpZ; - } - a_DistortAmpX = AmpX / Sum; - a_DistortAmpZ = AmpZ / Sum; -} - - - - |