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authorHowaner <franzi.moos@googlemail.com>2014-11-18 14:56:32 +0100
committerHowaner <franzi.moos@googlemail.com>2014-11-18 14:56:32 +0100
commit42120e2ea5db0cdb9920ff1c5efef33e0f496d48 (patch)
tree20ba1ae0a53f757cb8814b6cd6a466fe5acf1308 /src/Generating/Noise3DGenerator.h
parentFixed compile errors. (diff)
parentMerge pull request #1598 from mc-server/SignEditor (diff)
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Diffstat (limited to 'src/Generating/Noise3DGenerator.h')
-rw-r--r--src/Generating/Noise3DGenerator.h134
1 files changed, 127 insertions, 7 deletions
diff --git a/src/Generating/Noise3DGenerator.h b/src/Generating/Noise3DGenerator.h
index 42f61a854..ba541fbcc 100644
--- a/src/Generating/Noise3DGenerator.h
+++ b/src/Generating/Noise3DGenerator.h
@@ -1,7 +1,11 @@
// Noise3DGenerator.h
-// Generates terrain using 3D noise, rather than composing. Is a test.
+// Declares cNoise3DGenerator and cNoise3DComposable classes, representing 3D-noise-based generators.
+// They generate terrain shape by combining a lerp of two 3D noises with a vertical linear gradient
+// cNoise3DGenerator is obsolete and unmaintained.
+// cNoise3DComposable is used to test parameter combinations for single-biome worlds.
+
@@ -74,31 +78,147 @@ public:
void Initialize(cIniFile & a_IniFile);
protected:
- cNoise m_Noise1;
- cNoise m_Noise2;
- cNoise m_Noise3;
+ /** The noise that is used to choose between density noise A and B. */
+ cPerlinNoise m_ChoiceNoise;
+
+ /** Density 3D noise, variant A. */
+ cPerlinNoise m_DensityNoiseA;
+
+ /** Density 3D noise, variant B. */
+ cPerlinNoise m_DensityNoiseB;
+
+ /** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+ cPerlinNoise m_BaseNoise;
- int m_SeaLevel;
+ /** Block height of the sealevel, used for composing the terrain. */
+ int m_SeaLevel;
+
+ /** The main parameter of the generator, specifies the slope of the vertical linear gradient.
+ A higher value means a steeper slope and a smaller total amplitude of the generated terrain. */
NOISE_DATATYPE m_HeightAmplification;
- NOISE_DATATYPE m_MidPoint; // Where the vertical "center" of the noise should be
+
+ /** Where the vertical "center" of the noise should be, as block height. */
+ NOISE_DATATYPE m_MidPoint;
+
+ // Frequency of the 3D noise's first octave:
NOISE_DATATYPE m_FrequencyX;
NOISE_DATATYPE m_FrequencyY;
NOISE_DATATYPE m_FrequencyZ;
+
+ // Frequency of the base terrain noise:
+ NOISE_DATATYPE m_BaseFrequencyX;
+ NOISE_DATATYPE m_BaseFrequencyZ;
+
+ // Frequency of the choice noise:
+ NOISE_DATATYPE m_ChoiceFrequencyX;
+ NOISE_DATATYPE m_ChoiceFrequencyY;
+ NOISE_DATATYPE m_ChoiceFrequencyZ;
+
+ // Threshold for when the values are considered air:
NOISE_DATATYPE m_AirThreshold;
+ // Cache for the last calculated chunk (reused between heightmap and composition queries):
int m_LastChunkX;
int m_LastChunkZ;
NOISE_DATATYPE m_NoiseArray[17 * 17 * 257]; // x + 17 * z + 17 * 17 * y
- /// Generates the 3D noise array used for terrain generation, unless the LastChunk coords are equal to coords given
+ /** Generates the 3D noise array used for terrain generation (m_NoiseArray), unless the LastChunk coords are equal to coords given */
void GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ);
// cTerrainHeightGen overrides:
virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+ virtual void InitializeHeightGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
+
+ // cTerrainCompositionGen overrides:
+ virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+ virtual void InitializeCompoGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
+} ;
+
+
+
+
+
+class cBiomalNoise3DComposable :
+ public cTerrainHeightGen,
+ public cTerrainCompositionGen
+{
+public:
+ cBiomalNoise3DComposable(int a_Seed, cBiomeGenPtr a_BiomeGen);
+
+ void Initialize(cIniFile & a_IniFile);
+
+protected:
+ /** Number of columns around the pixel to query for biomes for averaging. */
+ static const int AVERAGING_SIZE = 5;
+
+ /** Type used for a single parameter across the entire (downscaled) chunk. */
+ typedef NOISE_DATATYPE ChunkParam[5 * 5];
+
+
+ /** The noise that is used to choose between density noise A and B. */
+ cPerlinNoise m_ChoiceNoise;
+
+ /** Density 3D noise, variant A. */
+ cPerlinNoise m_DensityNoiseA;
+
+ /** Density 3D noise, variant B. */
+ cPerlinNoise m_DensityNoiseB;
+
+ /** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+ cPerlinNoise m_BaseNoise;
+
+ /** The underlying biome generator. */
+ cBiomeGenPtr m_BiomeGen;
+
+ /** Block height of the sealevel, used for composing the terrain. */
+ int m_SeaLevel;
+
+ // Frequency of the 3D noise's first octave:
+ NOISE_DATATYPE m_FrequencyX;
+ NOISE_DATATYPE m_FrequencyY;
+ NOISE_DATATYPE m_FrequencyZ;
+
+ // Frequency of the base terrain noise:
+ NOISE_DATATYPE m_BaseFrequencyX;
+ NOISE_DATATYPE m_BaseFrequencyZ;
+
+ // Frequency of the choice noise:
+ NOISE_DATATYPE m_ChoiceFrequencyX;
+ NOISE_DATATYPE m_ChoiceFrequencyY;
+ NOISE_DATATYPE m_ChoiceFrequencyZ;
+
+ // Threshold for when the values are considered air:
+ NOISE_DATATYPE m_AirThreshold;
+
+ // Cache for the last calculated chunk (reused between heightmap and composition queries):
+ int m_LastChunkX;
+ int m_LastChunkZ;
+ NOISE_DATATYPE m_NoiseArray[17 * 17 * 257]; // x + 17 * z + 17 * 17 * y
+
+ /** Weights for summing up neighboring biomes. */
+ NOISE_DATATYPE m_Weight[AVERAGING_SIZE * 2 + 1][AVERAGING_SIZE * 2 + 1];
+
+ /** The sum of m_Weight[]. */
+ NOISE_DATATYPE m_WeightSum;
+
+
+ /** Generates the 3D noise array used for terrain generation (m_NoiseArray), unless the LastChunk coords are equal to coords given */
+ void GenerateNoiseArrayIfNeeded(int a_ChunkX, int a_ChunkZ);
+
+ /** Calculates the biome-related parameters for the chunk. */
+ void CalcBiomeParamArrays(int a_ChunkX, int a_ChunkZ, ChunkParam & a_HeightAmp, ChunkParam & a_MidPoint);
+
+ /** Returns the parameters for the specified biome. */
+ void GetBiomeParams(EMCSBiome a_Biome, NOISE_DATATYPE & a_HeightAmp, NOISE_DATATYPE & a_MidPoint);
+
+ // cTerrainHeightGen overrides:
+ virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+ virtual void InitializeHeightGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
// cTerrainCompositionGen overrides:
virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+ virtual void InitializeCompoGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
} ;