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authorTiger Wang <ziwei.tiger@hotmail.co.uk>2014-12-13 13:11:01 +0100
committerTiger Wang <ziwei.tiger@hotmail.co.uk>2014-12-13 13:11:01 +0100
commit4b20a615192baeb5ef0a04a10161a03428cda8cd (patch)
treec6f25102267b0cc4a444f6e746679405948142b0 /src/Generating/Noise3DGenerator.h
parentFixed compilation? (diff)
parentMerge pull request #1660 from Seadragon91/master (diff)
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Diffstat (limited to 'src/Generating/Noise3DGenerator.h')
-rw-r--r--src/Generating/Noise3DGenerator.h147
1 files changed, 129 insertions, 18 deletions
diff --git a/src/Generating/Noise3DGenerator.h b/src/Generating/Noise3DGenerator.h
index 42f61a854..35b1e4c94 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+// cNoise3DGenerator is obsolete and unmaintained.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.
+
@@ -9,7 +13,8 @@
#pragma once
#include "ComposableGenerator.h"
-#include "../Noise.h"
+#include "../Noise/Noise.h"
+#include "../Noise/InterpolNoise.h"
@@ -30,17 +35,20 @@ public:
protected:
// Linear interpolation step sizes, must be divisors of cChunkDef::Width and cChunkDef::Height, respectively:
- static const int UPSCALE_X = 8;
- static const int UPSCALE_Y = 4;
- static const int UPSCALE_Z = 8;
+ static const int UPSCALE_X = 4;
+ static const int UPSCALE_Y = 8;
+ static const int UPSCALE_Z = 4;
// Linear interpolation buffer dimensions, calculated from the step sizes:
static const int DIM_X = 1 + cChunkDef::Width / UPSCALE_X;
static const int DIM_Y = 1 + cChunkDef::Height / UPSCALE_Y;
static const int DIM_Z = 1 + cChunkDef::Width / UPSCALE_Z;
- cPerlinNoise m_Perlin; // The base 3D noise source for the actual composition
- cCubicNoise m_Cubic; // The noise used for heightmap directing
+ /** The base 3D noise source for the actual composition */
+ cOctavedNoise<cInterp5DegNoise> m_Perlin;
+
+ /** The noise used for heightmap directing. */
+ cOctavedNoise<cInterp5DegNoise> m_Cubic;
int m_SeaLevel;
NOISE_DATATYPE m_HeightAmplification;
@@ -65,8 +73,7 @@ protected:
class cNoise3DComposable :
- public cTerrainHeightGen,
- public cTerrainCompositionGen
+ public cTerrainShapeGen
{
public:
cNoise3DComposable(int a_Seed);
@@ -74,31 +81,135 @@ public:
void Initialize(cIniFile & a_IniFile);
protected:
- cNoise m_Noise1;
- cNoise m_Noise2;
- cNoise m_Noise3;
+ /** The 3D noise that is used to choose between density noise A and B. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_ChoiceNoise;
+
+ /** Density 3D noise, variant A. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseA;
+
+ /** Density 3D noise, variant B. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseB;
+
+ /** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_BaseNoise;
- 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 GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
+ virtual void InitializeShapeGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
+} ;
+
+
+
+
+
+class cBiomalNoise3DComposable :
+ public cTerrainShapeGen
+{
+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. Must be less than or equal to 16. */
+ static const int AVERAGING_SIZE = 9;
+
+ /** Type used for a single parameter across the entire (downscaled) chunk. */
+ typedef NOISE_DATATYPE ChunkParam[5 * 5];
- // cTerrainCompositionGen overrides:
- virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+
+ /** The noise that is used to choose between density noise A and B. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_ChoiceNoise;
+
+ /** Density 3D noise, variant A. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseA;
+
+ /** Density 3D noise, variant B. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> m_DensityNoiseB;
+
+ /** Heightmap-like noise used to provide variance for low-amplitude biomes. */
+ cOctavedNoise<cInterpolNoise<Interp5Deg>> 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]; // 257 * x + y + 257 * 17 * z
+
+ /** 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);
+
+ // cTerrainShapeGen overrides:
+ virtual void GenShape(int a_ChunkX, int a_ChunkZ, cChunkDesc::Shape & a_Shape) override;
+ virtual void InitializeShapeGen(cIniFile & a_IniFile) override { Initialize(a_IniFile); }
} ;