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author | Mattes D <github@xoft.cz> | 2014-12-07 18:15:23 +0100 |
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committer | Mattes D <github@xoft.cz> | 2014-12-07 18:15:23 +0100 |
commit | 8ad1afcc1b98c03bd77b0d85236643ba04795d38 (patch) | |
tree | e340889a2d505f10fd45a80f7b951f3165d6294a /src/Generating/TwoHeights.cpp | |
parent | cEvent: Changed chrono duration resolution. (diff) | |
parent | Fixed format warning. (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/Generating/TwoHeights.cpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/Generating/TwoHeights.cpp b/src/Generating/TwoHeights.cpp new file mode 100644 index 000000000..e75c301de --- /dev/null +++ b/src/Generating/TwoHeights.cpp @@ -0,0 +1,121 @@ + +// TwoHeights.cpp + +// Implements the cTwoHeights class representing the terrain shape generator using two switched heightmaps + +#include "Globals.h" +#include "TwoHeights.h" +#include "../Noise/InterpolNoise.h" +#include "HeiGen.h" +#include "../LinearUpscale.h" +#include "../IniFile.h" + + + + + +class cTwoHeights: + public cTerrainShapeGen +{ + typedef cTerrainShapeGen super; +public: + cTwoHeights(int a_Seed, cBiomeGenPtr a_BiomeGen): + m_Seed(a_Seed), + m_Choice(a_Seed), + m_HeightA(a_Seed + 1, a_BiomeGen), + m_HeightB(a_Seed + 2, a_BiomeGen) + { + } + + + // cTerrainShapeGen override: + virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override + { + // Generate the two heightmaps: + cChunkDef::HeightMap heightsA; + cChunkDef::HeightMap heightsB; + m_HeightA.GenHeightMap(a_ChunkX, a_ChunkZ, heightsA); + m_HeightB.GenHeightMap(a_ChunkX, a_ChunkZ, heightsB); + + // Generate the choice noise: + NOISE_DATATYPE smallChoice[33 * 5 * 5]; + NOISE_DATATYPE workspace[33 * 5 * 5]; + NOISE_DATATYPE startX = 0; + NOISE_DATATYPE endX = 256 * m_FrequencyY; + NOISE_DATATYPE startY = a_ChunkX * cChunkDef::Width * m_FrequencyX; + NOISE_DATATYPE endY = (a_ChunkX * cChunkDef::Width + cChunkDef::Width + 1) * m_FrequencyX; + NOISE_DATATYPE startZ = a_ChunkZ * cChunkDef::Width * m_FrequencyZ; + NOISE_DATATYPE endZ = (a_ChunkZ * cChunkDef::Width + cChunkDef::Width + 1) * m_FrequencyZ; + m_Choice.Generate3D(smallChoice, 33, 5, 5, startX, endX, startY, endY, startZ, endZ, workspace); + NOISE_DATATYPE choice[257 * 17 * 17]; + LinearUpscale3DArray(smallChoice, 33, 5, 5, choice, 8, 4, 4); + + // Generate the shape: + int idxShape = 0; + for (int z = 0; z < cChunkDef::Width; z++) + { + for (int x = 0; x < cChunkDef::Width; x++) + { + int idxChoice = 257 * 17 * z + 257 * x; + NOISE_DATATYPE heightA = static_cast<NOISE_DATATYPE>(cChunkDef::GetHeight(heightsA, x, z)); + NOISE_DATATYPE heightB = static_cast<NOISE_DATATYPE>(cChunkDef::GetHeight(heightsB, x, z)); + for (int y = 0; y < cChunkDef::Height; y++) + { + int height = static_cast<int>(ClampedLerp(heightA, heightB, choice[idxChoice++])); + a_Shape[idxShape++] = (y < height) ? 1 : 0; + } + } // for x + } // for z + } + + + virtual void InitializeShapeGen(cIniFile & a_IniFile) + { + m_FrequencyX = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyX", 40)); + m_FrequencyY = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyY", 40)); + m_FrequencyZ = static_cast<NOISE_DATATYPE>(a_IniFile.GetValueSetF("Generator", "TwoHeightsFrequencyZ", 40)); + + // Initialize the two underlying height generators from an empty INI file: + cIniFile empty; + m_HeightA.InitializeHeightGen(empty); + m_HeightB.InitializeHeightGen(empty); + + // Add the choice octaves: + NOISE_DATATYPE freq = 0.001f; + NOISE_DATATYPE ampl = 1; + for (int i = 0; i < 4; i++) + { + m_Choice.AddOctave(freq, ampl); + freq = freq * 2; + ampl = ampl / 2; + } + } + +protected: + int m_Seed; + + /** The noise used to decide between the two heightmaps. */ + cOctavedNoise<cInterpolNoise<Interp5Deg>> m_Choice; + + /** The first height generator. */ + cHeiGenBiomal m_HeightA; + + /** The second height generator. */ + cHeiGenBiomal m_HeightB; + + /** The base frequencies for m_Choice in each of the world axis directions. */ + NOISE_DATATYPE m_FrequencyX, m_FrequencyY, m_FrequencyZ; +}; + + + + + +cTerrainShapeGenPtr CreateShapeGenTwoHeights(int a_Seed, cBiomeGenPtr a_BiomeGen) +{ + return std::make_shared<cTwoHeights>(a_Seed, a_BiomeGen); +} + + + + |