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Diffstat (limited to 'src/Generating/EndGen.cpp')
| -rw-r--r-- | src/Generating/EndGen.cpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/Generating/EndGen.cpp b/src/Generating/EndGen.cpp new file mode 100644 index 000000000..1fa0fa121 --- /dev/null +++ b/src/Generating/EndGen.cpp @@ -0,0 +1,217 @@ + +// EndGen.cpp + +// Implements the cEndGen class representing the generator for the End, both as a HeightGen and CompositionGen + +#include "Globals.h" +#include "EndGen.h" +#include "inifile/iniFile.h" +#include "../LinearUpscale.h" + + + + + +enum +{ + // Interpolation cell size: + INTERPOL_X = 4, + INTERPOL_Y = 4, + INTERPOL_Z = 4, + + // Size of chunk data, downscaled before interpolation: + DIM_X = 16 / INTERPOL_X + 1, + DIM_Y = 256 / INTERPOL_Y + 1, + DIM_Z = 16 / INTERPOL_Z + 1, +} ; + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cEndGen: + +cEndGen::cEndGen(int a_Seed) : + m_Seed(a_Seed), + m_IslandSizeX(256), + m_IslandSizeY(96), + m_IslandSizeZ(256), + m_FrequencyX(80), + m_FrequencyY(80), + m_FrequencyZ(80) +{ + m_Perlin.AddOctave(1, 1); + m_Perlin.AddOctave(2, 0.5); + m_Perlin.AddOctave(4, 0.25); +} + + + + + +void cEndGen::Initialize(cIniFile & a_IniFile) +{ + m_IslandSizeX = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeX", m_IslandSizeX); + m_IslandSizeY = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeY", m_IslandSizeY); + m_IslandSizeZ = a_IniFile.GetValueSetI("Generator", "EndGenIslandSizeZ", m_IslandSizeZ); + + m_FrequencyX = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "EndGenFrequencyX", m_FrequencyX); + m_FrequencyY = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "EndGenFrequencyY", m_FrequencyY); + m_FrequencyZ = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "EndGenFrequencyZ", m_FrequencyZ); + + // Recalculate the min and max chunk coords of the island + m_MaxChunkX = (m_IslandSizeX + cChunkDef::Width - 1) / cChunkDef::Width; + m_MinChunkX = -m_MaxChunkX; + m_MaxChunkZ = (m_IslandSizeZ + cChunkDef::Width - 1) / cChunkDef::Width; + m_MinChunkZ = -m_MaxChunkZ; +} + + + + + +/// Unless the LastChunk coords are equal to coords given, prepares the internal state (noise array) +void cEndGen::PrepareState(int a_ChunkX, int a_ChunkZ) +{ + ASSERT(!IsChunkOutsideRange(a_ChunkX, a_ChunkZ)); // Should be filtered before calling this function + + if ((m_LastChunkX == a_ChunkX) && (m_LastChunkZ == a_ChunkZ)) + { + return; + } + + m_LastChunkX = a_ChunkX; + m_LastChunkZ = a_ChunkZ; + + GenerateNoiseArray(); +} + + + + + +/// Generates the m_NoiseArray array for the current chunk +void cEndGen::GenerateNoiseArray(void) +{ + NOISE_DATATYPE NoiseData[DIM_X * DIM_Y * DIM_Z]; // [x + DIM_X * z + DIM_X * DIM_Z * y] + NOISE_DATATYPE Workspace[DIM_X * DIM_Y * DIM_Z]; // [x + DIM_X * z + DIM_X * DIM_Z * y] + + // Generate the downscaled noise: + NOISE_DATATYPE StartX = ((NOISE_DATATYPE)(m_LastChunkX * cChunkDef::Width)) / m_FrequencyX; + NOISE_DATATYPE EndX = ((NOISE_DATATYPE)((m_LastChunkX + 1) * cChunkDef::Width)) / m_FrequencyX; + NOISE_DATATYPE StartZ = ((NOISE_DATATYPE)(m_LastChunkZ * cChunkDef::Width)) / m_FrequencyZ; + NOISE_DATATYPE EndZ = ((NOISE_DATATYPE)((m_LastChunkZ + 1) * cChunkDef::Width)) / m_FrequencyZ; + NOISE_DATATYPE StartY = 0; + NOISE_DATATYPE EndY = ((NOISE_DATATYPE)257) / m_FrequencyY; + m_Perlin.Generate3D(NoiseData, DIM_X, DIM_Z, DIM_Y, StartX, EndX, StartZ, EndZ, StartY, EndY, Workspace); + + // Add distance: + int idx = 0; + for (int y = 0; y < DIM_Y; y++) + { + NOISE_DATATYPE ValY = (NOISE_DATATYPE)(2 * INTERPOL_Y * y - m_IslandSizeY) / m_IslandSizeY; + ValY = ValY * ValY; + for (int z = 0; z < DIM_Z; z++) + { + NOISE_DATATYPE ValZ = (NOISE_DATATYPE)(m_LastChunkZ * cChunkDef::Width + (z * cChunkDef::Width / (DIM_Z - 1))) / m_IslandSizeZ; + ValZ = ValZ * ValZ; + for (int x = 0; x < DIM_X; x++) + { + // NOISE_DATATYPE ValX = StartX + (EndX - StartX) * x / (DIM_X - 1); + NOISE_DATATYPE ValX = (NOISE_DATATYPE)(m_LastChunkX * cChunkDef::Width + (x * cChunkDef::Width / (DIM_X - 1))) / m_IslandSizeX; + ValX = ValX * ValX; + NoiseData[idx++] += ValX + ValZ + ValY; + } // for x + } // for z + } // for y + + // Upscale into real chunk size: + LinearUpscale3DArray(NoiseData, DIM_X, DIM_Z, DIM_Y, m_NoiseArray, INTERPOL_X, INTERPOL_Z, INTERPOL_Y); +} + + + + + +/// Returns true if the chunk is outside of the island's dimensions +bool cEndGen::IsChunkOutsideRange(int a_ChunkX, int a_ChunkZ) +{ + return ( + (a_ChunkX < m_MinChunkX) || (a_ChunkX > m_MaxChunkX) || + (a_ChunkZ < m_MinChunkZ) || (a_ChunkZ > m_MaxChunkZ) + ); +} + + + + + +void cEndGen::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) +{ + if (IsChunkOutsideRange(a_ChunkX, a_ChunkZ)) + { + for (unsigned int i = 0; i < ARRAYCOUNT(a_HeightMap); i++) + { + a_HeightMap[i] = 0; + } + return; + } + + PrepareState(a_ChunkX, a_ChunkZ); + + int MaxY = std::min((int)(1.75 * m_IslandSizeY + 1), cChunkDef::Height - 1); + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int x = 0; x < cChunkDef::Width; x++) + { + cChunkDef::SetHeight(a_HeightMap, x, z, MaxY); + for (int y = MaxY; y > 0; y--) + { + if (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= 0) + { + cChunkDef::SetHeight(a_HeightMap, x, z, y); + break; + } + } // for y + } // for x + } // for z +} + + + + + +void cEndGen::ComposeTerrain(cChunkDesc & a_ChunkDesc) +{ + if (IsChunkOutsideRange(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ())) + { + a_ChunkDesc.FillBlocks(E_BLOCK_AIR, 0); + return; + } + + PrepareState(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ()); + + int MaxY = std::min((int)(1.75 * m_IslandSizeY + 1), cChunkDef::Height - 1); + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int x = 0; x < cChunkDef::Width; x++) + { + for (int y = MaxY; y > 0; y--) + { + if (m_NoiseArray[y * 17 * 17 + z * 17 + x] <= 0) + { + a_ChunkDesc.SetBlockTypeMeta(x, y, z, E_BLOCK_END_STONE, 0); + } + else + { + a_ChunkDesc.SetBlockTypeMeta(x, y, z, E_BLOCK_AIR, 0); + } + } // for y + } // for x + } // for z +} + + + + |