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Diffstat (limited to 'src/Generating/StructGen.cpp')
| -rw-r--r-- | src/Generating/StructGen.cpp | 675 |
1 files changed, 675 insertions, 0 deletions
diff --git a/src/Generating/StructGen.cpp b/src/Generating/StructGen.cpp new file mode 100644 index 000000000..2180261aa --- /dev/null +++ b/src/Generating/StructGen.cpp @@ -0,0 +1,675 @@ + +// StructGen.h + +#include "Globals.h" +#include "StructGen.h" +#include "../BlockID.h" +#include "Trees.h" +#include "../BlockArea.h" +#include "../LinearUpscale.h" + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenOreNests configuration: + +const int MAX_HEIGHT_COAL = 127; +const int NUM_NESTS_COAL = 50; +const int NEST_SIZE_COAL = 10; + +const int MAX_HEIGHT_IRON = 64; +const int NUM_NESTS_IRON = 14; +const int NEST_SIZE_IRON = 6; + +const int MAX_HEIGHT_REDSTONE = 16; +const int NUM_NESTS_REDSTONE = 4; +const int NEST_SIZE_REDSTONE = 6; + +const int MAX_HEIGHT_GOLD = 32; +const int NUM_NESTS_GOLD = 2; +const int NEST_SIZE_GOLD = 6; + +const int MAX_HEIGHT_DIAMOND = 15; +const int NUM_NESTS_DIAMOND = 1; +const int NEST_SIZE_DIAMOND = 4; + +const int MAX_HEIGHT_LAPIS = 30; +const int NUM_NESTS_LAPIS = 2; +const int NEST_SIZE_LAPIS = 5; + +const int MAX_HEIGHT_DIRT = 127; +const int NUM_NESTS_DIRT = 20; +const int NEST_SIZE_DIRT = 32; + +const int MAX_HEIGHT_GRAVEL = 70; +const int NUM_NESTS_GRAVEL = 15; +const int NEST_SIZE_GRAVEL = 32; + + + + + +template <typename T> T Clamp(T a_Value, T a_Min, T a_Max) +{ + return (a_Value < a_Min) ? a_Min : ((a_Value > a_Max) ? a_Max : a_Value); +} + + + + + +static bool SortTreeBlocks(const sSetBlock & a_First, const sSetBlock & a_Second) +{ + return (a_First.BlockType == E_BLOCK_LOG) && (a_Second.BlockType != E_BLOCK_LOG); +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenTrees: + +void cStructGenTrees::GenStructures(cChunkDesc & a_ChunkDesc) +{ + int ChunkX = a_ChunkDesc.GetChunkX(); + int ChunkZ = a_ChunkDesc.GetChunkZ(); + + cChunkDesc WorkerDesc(ChunkX, ChunkZ); + + // Generate trees: + for (int x = 0; x <= 2; x++) + { + int BaseX = ChunkX + x - 1; + for (int z = 0; z <= 2; z++) + { + int BaseZ = ChunkZ + z - 1; + + cChunkDesc * Dest; + + if ((x != 1) || (z != 1)) + { + Dest = &WorkerDesc; + WorkerDesc.SetChunkCoords(BaseX, BaseZ); + + m_BiomeGen->GenBiomes (BaseX, BaseZ, WorkerDesc.GetBiomeMap()); + m_HeightGen->GenHeightMap (BaseX, BaseZ, WorkerDesc.GetHeightMap()); + m_CompositionGen->ComposeTerrain(WorkerDesc); + // TODO: Free the entity lists + } + else + { + Dest = &a_ChunkDesc; + } + + int NumTrees = GetNumTrees(BaseX, BaseZ, Dest->GetBiomeMap()); + + sSetBlockVector OutsideLogs, OutsideOther; + for (int i = 0; i < NumTrees; i++) + { + GenerateSingleTree(BaseX, BaseZ, i, *Dest, OutsideLogs, OutsideOther); + } + + sSetBlockVector IgnoredOverflow; + IgnoredOverflow.reserve(OutsideOther.size()); + ApplyTreeImage(ChunkX, ChunkZ, a_ChunkDesc, OutsideOther, IgnoredOverflow); + IgnoredOverflow.clear(); + IgnoredOverflow.reserve(OutsideLogs.size()); + ApplyTreeImage(ChunkX, ChunkZ, a_ChunkDesc, OutsideLogs, IgnoredOverflow); + } // for z + } // for x + + // Update the heightmap: + for (int x = 0; x < cChunkDef::Width; x++) + { + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int y = cChunkDef::Height - 1; y >= 0; y--) + { + if (a_ChunkDesc.GetBlockType(x, y, z) != E_BLOCK_AIR) + { + a_ChunkDesc.SetHeight(x, z, y); + break; + } + } // for y + } // for z + } // for x +} + + + + + +void cStructGenTrees::GenerateSingleTree( + int a_ChunkX, int a_ChunkZ, int a_Seq, + cChunkDesc & a_ChunkDesc, + sSetBlockVector & a_OutsideLogs, + sSetBlockVector & a_OutsideOther +) +{ + int x = (m_Noise.IntNoise3DInt(a_ChunkX + a_ChunkZ, a_ChunkZ, a_Seq) / 19) % cChunkDef::Width; + int z = (m_Noise.IntNoise3DInt(a_ChunkX - a_ChunkZ, a_Seq, a_ChunkZ) / 19) % cChunkDef::Width; + + int Height = a_ChunkDesc.GetHeight(x, z); + + if ((Height <= 0) || (Height > 240)) + { + return; + } + + // Check the block underneath the tree: + BLOCKTYPE TopBlock = a_ChunkDesc.GetBlockType(x, Height, z); + if ((TopBlock != E_BLOCK_DIRT) && (TopBlock != E_BLOCK_GRASS) && (TopBlock != E_BLOCK_FARMLAND)) + { + return; + } + + sSetBlockVector TreeLogs, TreeOther; + GetTreeImageByBiome( + a_ChunkX * cChunkDef::Width + x, Height + 1, a_ChunkZ * cChunkDef::Width + z, + m_Noise, a_Seq, + a_ChunkDesc.GetBiome(x, z), + TreeLogs, TreeOther + ); + + // Check if the generated image fits the terrain. Only the logs are checked: + for (sSetBlockVector::const_iterator itr = TreeLogs.begin(); itr != TreeLogs.end(); ++itr) + { + if ((itr->ChunkX != a_ChunkX) || (itr->ChunkZ != a_ChunkZ)) + { + // Outside the chunk + continue; + } + + BLOCKTYPE Block = a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z); + switch (Block) + { + CASE_TREE_ALLOWED_BLOCKS: + { + break; + } + default: + { + // There's something in the way, abort this tree altogether + return; + } + } + } + + ApplyTreeImage(a_ChunkX, a_ChunkZ, a_ChunkDesc, TreeOther, a_OutsideOther); + ApplyTreeImage(a_ChunkX, a_ChunkZ, a_ChunkDesc, TreeLogs, a_OutsideLogs); +} + + + + + +void cStructGenTrees::ApplyTreeImage( + int a_ChunkX, int a_ChunkZ, + cChunkDesc & a_ChunkDesc, + const sSetBlockVector & a_Image, + sSetBlockVector & a_Overflow +) +{ + // Put the generated image into a_BlockTypes, push things outside this chunk into a_Blocks + for (sSetBlockVector::const_iterator itr = a_Image.begin(), end = a_Image.end(); itr != end; ++itr) + { + if ((itr->ChunkX == a_ChunkX) && (itr->ChunkZ == a_ChunkZ)) + { + // Inside this chunk, integrate into a_ChunkDesc: + switch (a_ChunkDesc.GetBlockType(itr->x, itr->y, itr->z)) + { + case E_BLOCK_LEAVES: + { + if (itr->BlockType != E_BLOCK_LOG) + { + break; + } + // fallthrough: + } + CASE_TREE_OVERWRITTEN_BLOCKS: + { + a_ChunkDesc.SetBlockTypeMeta(itr->x, itr->y, itr->z, itr->BlockType, itr->BlockMeta); + break; + } + + } // switch (GetBlock()) + continue; + } + + // Outside the chunk, push into a_Overflow. + // Don't check if already present there, by separating logs and others we don't need the checks anymore: + a_Overflow.push_back(*itr); + } +} + + + + + +int cStructGenTrees::GetNumTrees( + int a_ChunkX, int a_ChunkZ, + const cChunkDef::BiomeMap & a_Biomes +) +{ + int NumTrees = 0; + for (int x = 0; x < cChunkDef::Width; x++) for (int z = 0; z < cChunkDef::Width; z++) + { + int Add = 0; + switch (cChunkDef::GetBiome(a_Biomes, x, z)) + { + case biPlains: Add = 1; break; + case biExtremeHills: Add = 3; break; + case biForest: Add = 30; break; + case biTaiga: Add = 30; break; + case biSwampland: Add = 8; break; + case biIcePlains: Add = 1; break; + case biIceMountains: Add = 1; break; + case biMushroomIsland: Add = 3; break; + case biMushroomShore: Add = 3; break; + case biForestHills: Add = 20; break; + case biTaigaHills: Add = 20; break; + case biExtremeHillsEdge: Add = 5; break; + case biJungle: Add = 120; break; + case biJungleHills: Add = 90; break; + } + NumTrees += Add; + } + return NumTrees / 1024; +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenOreNests: + +void cStructGenOreNests::GenStructures(cChunkDesc & a_ChunkDesc) +{ + int ChunkX = a_ChunkDesc.GetChunkX(); + int ChunkZ = a_ChunkDesc.GetChunkZ(); + cChunkDef::BlockTypes & BlockTypes = a_ChunkDesc.GetBlockTypes(); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_COAL_ORE, MAX_HEIGHT_COAL, NUM_NESTS_COAL, NEST_SIZE_COAL, BlockTypes, 1); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_IRON_ORE, MAX_HEIGHT_IRON, NUM_NESTS_IRON, NEST_SIZE_IRON, BlockTypes, 2); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_REDSTONE_ORE, MAX_HEIGHT_REDSTONE, NUM_NESTS_REDSTONE, NEST_SIZE_REDSTONE, BlockTypes, 3); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_GOLD_ORE, MAX_HEIGHT_GOLD, NUM_NESTS_GOLD, NEST_SIZE_GOLD, BlockTypes, 4); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_DIAMOND_ORE, MAX_HEIGHT_DIAMOND, NUM_NESTS_DIAMOND, NEST_SIZE_DIAMOND, BlockTypes, 5); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_LAPIS_ORE, MAX_HEIGHT_LAPIS, NUM_NESTS_LAPIS, NEST_SIZE_LAPIS, BlockTypes, 6); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_DIRT, MAX_HEIGHT_DIRT, NUM_NESTS_DIRT, NEST_SIZE_DIRT, BlockTypes, 10); + GenerateOre(ChunkX, ChunkZ, E_BLOCK_GRAVEL, MAX_HEIGHT_GRAVEL, NUM_NESTS_GRAVEL, NEST_SIZE_GRAVEL, BlockTypes, 11); +} + + + + + +void cStructGenOreNests::GenerateOre(int a_ChunkX, int a_ChunkZ, BLOCKTYPE a_OreType, int a_MaxHeight, int a_NumNests, int a_NestSize, cChunkDef::BlockTypes & a_BlockTypes, int a_Seq) +{ + // This function generates several "nests" of ore, each nest consisting of number of ore blocks relatively adjacent to each other. + // It does so by making a random XYZ walk and adding ore along the way in cuboids of different (random) sizes + // Only stone gets replaced with ore, all other blocks stay (so the nest can actually be smaller than specified). + + for (int i = 0; i < a_NumNests; i++) + { + int rnd = m_Noise.IntNoise3DInt(a_ChunkX + i, a_Seq, a_ChunkZ + 64 * i) / 8; + int BaseX = rnd % cChunkDef::Width; + rnd /= cChunkDef::Width; + int BaseZ = rnd % cChunkDef::Width; + rnd /= cChunkDef::Width; + int BaseY = rnd % a_MaxHeight; + rnd /= a_MaxHeight; + int NestSize = a_NestSize + (rnd % (a_NestSize / 4)); // The actual nest size may be up to 1/4 larger + int Num = 0; + while (Num < NestSize) + { + // Put a cuboid around [BaseX, BaseY, BaseZ] + int rnd = m_Noise.IntNoise3DInt(a_ChunkX + 64 * i, 2 * a_Seq + Num, a_ChunkZ + 32 * i) / 8; + int xsize = rnd % 2; + int ysize = (rnd / 4) % 2; + int zsize = (rnd / 16) % 2; + rnd >>= 8; + for (int x = xsize; x >= 0; --x) + { + int BlockX = BaseX + x; + if ((BlockX < 0) || (BlockX >= cChunkDef::Width)) + { + Num++; // So that the cycle finishes even if the base coords wander away from the chunk + continue; + } + for (int y = ysize; y >= 0; --y) + { + int BlockY = BaseY + y; + if ((BlockY < 0) || (BlockY >= cChunkDef::Height)) + { + Num++; // So that the cycle finishes even if the base coords wander away from the chunk + continue; + } + for (int z = zsize; z >= 0; --z) + { + int BlockZ = BaseZ + z; + if ((BlockZ < 0) || (BlockZ >= cChunkDef::Width)) + { + Num++; // So that the cycle finishes even if the base coords wander away from the chunk + continue; + } + + int Index = cChunkDef::MakeIndexNoCheck(BlockX, BlockY, BlockZ); + if (a_BlockTypes[Index] == E_BLOCK_STONE) + { + a_BlockTypes[Index] = a_OreType; + } + Num++; + } // for z + } // for y + } // for x + + // Move the base to a neighbor voxel + switch (rnd % 4) + { + case 0: BaseX--; break; + case 1: BaseX++; break; + } + switch ((rnd >> 3) % 4) + { + case 0: BaseY--; break; + case 1: BaseY++; break; + } + switch ((rnd >> 6) % 4) + { + case 0: BaseZ--; break; + case 1: BaseZ++; break; + } + } // while (Num < NumBlocks) + } // for i - NumNests +} + + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenLakes: + +void cStructGenLakes::GenStructures(cChunkDesc & a_ChunkDesc) +{ + int ChunkX = a_ChunkDesc.GetChunkX(); + int ChunkZ = a_ChunkDesc.GetChunkZ(); + + for (int z = -1; z < 2; z++) for (int x = -1; x < 2; x++) + { + if (((m_Noise.IntNoise2DInt(ChunkX + x, ChunkZ + z) / 17) % 100) > m_Probability) + { + continue; + } + + cBlockArea Lake; + CreateLakeImage(ChunkX + x, ChunkZ + z, Lake); + + int OfsX = Lake.GetOriginX() + x * cChunkDef::Width; + int OfsZ = Lake.GetOriginZ() + z * cChunkDef::Width; + + // Merge the lake into the current data + a_ChunkDesc.WriteBlockArea(Lake, OfsX, Lake.GetOriginY(), OfsZ, cBlockArea::msLake); + } // for x, z - neighbor chunks +} + + + + + +void cStructGenLakes::CreateLakeImage(int a_ChunkX, int a_ChunkZ, cBlockArea & a_Lake) +{ + a_Lake.Create(16, 8, 16); + a_Lake.Fill(cBlockArea::baTypes, E_BLOCK_SPONGE); // Sponge is the NOP blocktype for lake merging strategy + + // Find the minimum height in this chunk: + cChunkDef::HeightMap HeightMap; + m_HeiGen.GenHeightMap(a_ChunkX, a_ChunkZ, HeightMap); + HEIGHTTYPE MinHeight = HeightMap[0]; + for (int i = 1; i < ARRAYCOUNT(HeightMap); i++) + { + if (HeightMap[i] < MinHeight) + { + MinHeight = HeightMap[i]; + } + } + + // Make a random position in the chunk by using a random 16 block XZ offset and random height up to chunk's max height minus 6 + MinHeight = std::max(MinHeight - 6, 2); + int Rnd = m_Noise.IntNoise3DInt(a_ChunkX, 128, a_ChunkZ) / 11; + // Random offset [-8 .. 8], with higher probability around 0; add up four three-bit-wide randoms [0 .. 28], divide and subtract to get range + int OffsetX = 4 * ((Rnd & 0x07) + ((Rnd & 0x38) >> 3) + ((Rnd & 0x1c0) >> 6) + ((Rnd & 0xe00) >> 9)) / 7 - 8; + Rnd >>= 12; + // Random offset [-8 .. 8], with higher probability around 0; add up four three-bit-wide randoms [0 .. 28], divide and subtract to get range + int OffsetZ = 4 * ((Rnd & 0x07) + ((Rnd & 0x38) >> 3) + ((Rnd & 0x1c0) >> 6) + ((Rnd & 0xe00) >> 9)) / 7 - 8; + Rnd = m_Noise.IntNoise3DInt(a_ChunkX, 512, a_ChunkZ) / 13; + // Random height [1 .. MinHeight] with preference to center heights + int HeightY = 1 + (((Rnd & 0x1ff) % MinHeight) + (((Rnd >> 9) & 0x1ff) % MinHeight)) / 2; + + a_Lake.SetOrigin(OffsetX, HeightY, OffsetZ); + + // Hollow out a few bubbles inside the blockarea: + int NumBubbles = 4 + ((Rnd >> 18) & 0x03); // 4 .. 7 bubbles + BLOCKTYPE * BlockTypes = a_Lake.GetBlockTypes(); + for (int i = 0; i < NumBubbles; i++) + { + int Rnd = m_Noise.IntNoise3DInt(a_ChunkX, i, a_ChunkZ) / 13; + const int BubbleR = 2 + (Rnd & 0x03); // 2 .. 5 + const int Range = 16 - 2 * BubbleR; + const int BubbleX = BubbleR + (Rnd % Range); + Rnd >>= 4; + const int BubbleY = 4 + (Rnd & 0x01); // 4 .. 5 + Rnd >>= 1; + const int BubbleZ = BubbleR + (Rnd % Range); + Rnd >>= 4; + const int HalfR = BubbleR / 2; // 1 .. 2 + const int RSquared = BubbleR * BubbleR; + for (int y = -HalfR; y <= HalfR; y++) + { + // BubbleY + y is in the [0, 7] bounds + int DistY = 4 * y * y / 3; + int IdxY = (BubbleY + y) * 16 * 16; + for (int z = -BubbleR; z <= BubbleR; z++) + { + int DistYZ = DistY + z * z; + if (DistYZ >= RSquared) + { + continue; + } + int IdxYZ = BubbleX + IdxY + (BubbleZ + z) * 16; + for (int x = -BubbleR; x <= BubbleR; x++) + { + if (x * x + DistYZ < RSquared) + { + BlockTypes[x + IdxYZ] = E_BLOCK_AIR; + } + } // for x + } // for z + } // for y + } // for i - bubbles + + // Turn air in the bottom half into liquid: + for (int y = 0; y < 4; y++) + { + for (int z = 0; z < 16; z++) for (int x = 0; x < 16; x++) + { + if (BlockTypes[x + z * 16 + y * 16 * 16] == E_BLOCK_AIR) + { + BlockTypes[x + z * 16 + y * 16 * 16] = m_Fluid; + } + } // for z, x + } // for y + + // TODO: Turn sponge next to lava into stone + + // a_Lake.SaveToSchematicFile(Printf("Lake_%d_%d.schematic", a_ChunkX, a_ChunkZ)); +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenDirectOverhangs: + +cStructGenDirectOverhangs::cStructGenDirectOverhangs(int a_Seed) : + m_Noise1(a_Seed), + m_Noise2(a_Seed + 1000) +{ +} + + + + + +void cStructGenDirectOverhangs::GenStructures(cChunkDesc & a_ChunkDesc) +{ + // If there is no column of the wanted biome, bail out: + if (!HasWantedBiome(a_ChunkDesc)) + { + return; + } + + HEIGHTTYPE MaxHeight = a_ChunkDesc.GetMaxHeight(); + + const int SEGMENT_HEIGHT = 8; + const int INTERPOL_X = 16; // Must be a divisor of 16 + const int INTERPOL_Z = 16; // Must be a divisor of 16 + // Interpolate the chunk in 16 * SEGMENT_HEIGHT * 16 "segments", each SEGMENT_HEIGHT blocks high and each linearly interpolated separately. + // Have two buffers, one for the lowest floor and one for the highest floor, so that Y-interpolation can be done between them + // Then swap the buffers and use the previously-top one as the current-bottom, without recalculating it. + + int FloorBuf1[17 * 17]; + int FloorBuf2[17 * 17]; + int * FloorHi = FloorBuf1; + int * FloorLo = FloorBuf2; + int BaseX = a_ChunkDesc.GetChunkX() * cChunkDef::Width; + int BaseZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width; + int BaseY = 63; + + // Interpolate the lowest floor: + for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++) + { + FloorLo[INTERPOL_X * x + 17 * INTERPOL_Z * z] = + m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, BaseY, BaseZ + INTERPOL_Z * z) * + m_Noise2.IntNoise3DInt(BaseX + INTERPOL_X * x, BaseY, BaseZ + INTERPOL_Z * z) / + 256; + } // for x, z - FloorLo[] + LinearUpscale2DArrayInPlace(FloorLo, 17, 17, INTERPOL_X, INTERPOL_Z); + + // Interpolate segments: + for (int Segment = BaseY; Segment < MaxHeight; Segment += SEGMENT_HEIGHT) + { + // First update the high floor: + for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++) + { + FloorHi[INTERPOL_X * x + 17 * INTERPOL_Z * z] = + m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) * + m_Noise2.IntNoise3DInt(BaseX + INTERPOL_Z * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) / + 256; + } // for x, z - FloorLo[] + LinearUpscale2DArrayInPlace(FloorHi, 17, 17, INTERPOL_X, INTERPOL_Z); + + // Interpolate between FloorLo and FloorHi: + for (int z = 0; z < 16; z++) for (int x = 0; x < 16; x++) + { + switch (a_ChunkDesc.GetBiome(x, z)) + { + case biExtremeHills: + case biExtremeHillsEdge: + { + int Lo = FloorLo[x + 17 * z] / 256; + int Hi = FloorHi[x + 17 * z] / 256; + for (int y = 0; y < SEGMENT_HEIGHT; y++) + { + int Val = Lo + (Hi - Lo) * y / SEGMENT_HEIGHT; + if (Val < 0) + { + a_ChunkDesc.SetBlockType(x, y + Segment, z, E_BLOCK_AIR); + } + } // for y + break; + } + } // switch (biome) + } // for z, x + + // Swap the floors: + std::swap(FloorLo, FloorHi); + } +} + + + + + +bool cStructGenDirectOverhangs::HasWantedBiome(cChunkDesc & a_ChunkDesc) const +{ + cChunkDef::BiomeMap & Biomes = a_ChunkDesc.GetBiomeMap(); + for (int i = 0; i < ARRAYCOUNT(Biomes); i++) + { + switch (Biomes[i]) + { + case biExtremeHills: + case biExtremeHillsEdge: + { + return true; + } + } + } // for i + return false; +} + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cStructGenDistortedMembraneOverhangs: + +cStructGenDistortedMembraneOverhangs::cStructGenDistortedMembraneOverhangs(int a_Seed) : + m_NoiseX(a_Seed + 1000), + m_NoiseY(a_Seed + 2000), + m_NoiseZ(a_Seed + 3000), + m_NoiseH(a_Seed + 4000) +{ +} + + + + + +void cStructGenDistortedMembraneOverhangs::GenStructures(cChunkDesc & a_ChunkDesc) +{ + const NOISE_DATATYPE Frequency = (NOISE_DATATYPE)16; + const NOISE_DATATYPE Amount = (NOISE_DATATYPE)1; + for (int y = 50; y < 128; y++) + { + NOISE_DATATYPE NoiseY = (NOISE_DATATYPE)y / 32; + // TODO: proper water level - where to get? + BLOCKTYPE ReplacementBlock = (y > 62) ? E_BLOCK_AIR : E_BLOCK_STATIONARY_WATER; + for (int z = 0; z < cChunkDef::Width; z++) + { + NOISE_DATATYPE NoiseZ = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + z)) / Frequency; + for (int x = 0; x < cChunkDef::Width; x++) + { + NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + x)) / Frequency; + NOISE_DATATYPE DistortX = m_NoiseX.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount; + NOISE_DATATYPE DistortY = m_NoiseY.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount; + NOISE_DATATYPE DistortZ = m_NoiseZ.CubicNoise3D(NoiseX, NoiseY, NoiseZ) * Amount; + int MembraneHeight = 96 - (int)((DistortY + m_NoiseH.CubicNoise2D(NoiseX + DistortX, NoiseZ + DistortZ)) * 30); + if (MembraneHeight < y) + { + a_ChunkDesc.SetBlockType(x, y, z, ReplacementBlock); + } + } // for y + } // for x + } // for z +} + + + + |