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MultiStepMap BiomeGen: made 3x faster by using 2D noise instead of 3D noise.

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git-svn-id: http://mc-server.googlecode.com/svn/trunk@1410 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com 2013-04-24 14:35:13 +00:00
parent 7d039dfa90
commit 2fa4993cad
2 changed files with 32 additions and 20 deletions
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43
source/Generating/BioGen.cpp
View File

@ -390,7 +390,12 @@ void cBioGenDistortedVoronoi::Distort(int a_BlockX, int a_BlockZ, int & a_Distor
// cBioGenMultiStepMap :
cBioGenMultiStepMap::cBioGenMultiStepMap(int a_Seed) :
m_Noise(a_Seed),
m_Noise1(a_Seed + 1000),
m_Noise2(a_Seed + 2000),
m_Noise3(a_Seed + 3000),
m_Noise4(a_Seed + 4000),
m_Noise5(a_Seed + 5000),
m_Noise6(a_Seed + 6000),
m_Seed(a_Seed),
m_OceanCellSize(384),
m_MushroomIslandSize(64),
@ -461,11 +466,11 @@ void cBioGenMultiStepMap::DecideOceanLandMushroom(int a_ChunkX, int a_ChunkZ, cC
{
int RealCellZ = zc + CellZ - NEIGHBORHOOD_SIZE;
int CellBlockZ = RealCellZ * m_OceanCellSize;
int OffsetX = (m_Noise.IntNoise3DInt(RealCellX, 16 * RealCellX + 32 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
int OffsetZ = (m_Noise.IntNoise3DInt(RealCellX, 32 * RealCellX - 16 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
int OffsetX = (m_Noise2.IntNoise3DInt(RealCellX, 16 * RealCellX + 32 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
int OffsetZ = (m_Noise4.IntNoise3DInt(RealCellX, 32 * RealCellX - 16 * RealCellZ, RealCellZ) / 8) % m_OceanCellSize;
SeedX[xc][zc] = CellBlockX + OffsetX;
SeedZ[xc][zc] = CellBlockZ + OffsetZ;
SeedV[xc][zc] = (((m_Noise.IntNoise3DInt(RealCellX, RealCellX - RealCellZ + 1000, RealCellZ) / 11) % 256) > 90) ? biOcean : ((EMCSBiome)(-1));
SeedV[xc][zc] = (((m_Noise6.IntNoise3DInt(RealCellX, RealCellX - RealCellZ + 1000, RealCellZ) / 11) % 256) > 90) ? biOcean : ((EMCSBiome)(-1));
} // for z
} // for x
@ -546,9 +551,9 @@ void cBioGenMultiStepMap::AddRivers(int a_ChunkX, int a_ChunkZ, cChunkDef::Biome
float NoiseCoordX = (float)(a_ChunkX * cChunkDef::Width + x) / m_RiverCellSize;
double Noise = m_Noise.CubicNoise3D( NoiseCoordX, NoiseCoordZ, 4000);
Noise += 0.5 * m_Noise.CubicNoise3D(2 * NoiseCoordX, 2 * NoiseCoordZ, 5000);
Noise += 0.1 * m_Noise.CubicNoise3D(8 * NoiseCoordX, 8 * NoiseCoordZ, 6000);
double Noise = m_Noise1.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
Noise += 0.5 * m_Noise3.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
Noise += 0.1 * m_Noise5.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
if ((Noise > 0) && (Noise < m_RiverWidthThreshold))
{
@ -578,12 +583,12 @@ void cBioGenMultiStepMap::ApplyTemperatureHumidity(int a_ChunkX, int a_ChunkZ, c
void cBioGenMultiStepMap::Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ, int a_CellSize)
{
double NoiseX = m_Noise.CubicNoise3D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize, 1000);
NoiseX += 0.5 * m_Noise.CubicNoise3D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize, 2000);
NoiseX += 0.1 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize, 3000);
double NoiseZ = m_Noise.CubicNoise3D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize, 4000);
NoiseZ += 0.5 * m_Noise.CubicNoise3D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize, 5000);
NoiseZ += 0.1 * m_Noise.CubicNoise3D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize, 6000);
double NoiseX = m_Noise3.CubicNoise2D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize);
NoiseX += 0.5 * m_Noise2.CubicNoise2D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize);
NoiseX += 0.1 * m_Noise1.CubicNoise2D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize);
double NoiseZ = m_Noise6.CubicNoise2D( (float)a_BlockX / a_CellSize, (float)a_BlockZ / a_CellSize);
NoiseZ += 0.5 * m_Noise5.CubicNoise2D(2 * (float)a_BlockX / a_CellSize, 2 * (float)a_BlockZ / a_CellSize);
NoiseZ += 0.1 * m_Noise4.CubicNoise2D(16 * (float)a_BlockX / a_CellSize, 16 * (float)a_BlockZ / a_CellSize);
a_DistortedX = a_BlockX + (int)(a_CellSize * 0.5 * NoiseX);
a_DistortedZ = a_BlockZ + (int)(a_CellSize * 0.5 * NoiseZ);
@ -605,14 +610,14 @@ void cBioGenMultiStepMap::BuildTemperatureHumidityMaps(int a_ChunkX, int a_Chunk
{
float NoiseCoordX = (float)(a_ChunkX * cChunkDef::Width + x) / m_LandBiomesSize;
double NoiseT = m_Noise.CubicNoise3D( NoiseCoordX, NoiseCoordZ, 7000);
NoiseT += 0.5 * m_Noise.CubicNoise3D(2 * NoiseCoordX, 2 * NoiseCoordZ, 8000);
NoiseT += 0.1 * m_Noise.CubicNoise3D(8 * NoiseCoordX, 8 * NoiseCoordZ, 9000);
double NoiseT = m_Noise1.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
NoiseT += 0.5 * m_Noise2.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
NoiseT += 0.1 * m_Noise3.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
TemperatureMap[x + 17 * z] = NoiseT;
double NoiseH = m_Noise.CubicNoise3D( NoiseCoordX, NoiseCoordZ, 9000);
NoiseH += 0.5 * m_Noise.CubicNoise3D(2 * NoiseCoordX, 2 * NoiseCoordZ, 5000);
NoiseH += 0.1 * m_Noise.CubicNoise3D(8 * NoiseCoordX, 8 * NoiseCoordZ, 1000);
double NoiseH = m_Noise4.CubicNoise2D( NoiseCoordX, NoiseCoordZ);
NoiseH += 0.5 * m_Noise5.CubicNoise2D(2 * NoiseCoordX, 2 * NoiseCoordZ);
NoiseH += 0.1 * m_Noise6.CubicNoise2D(8 * NoiseCoordX, 8 * NoiseCoordZ);
HumidityMap[x + 17 * z] = NoiseH;
} // for x
} // for z

9
source/Generating/BioGen.h
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@ -175,7 +175,14 @@ public:
cBioGenMultiStepMap(int a_Seed);
protected:
cNoise m_Noise;
// Noises used for composing the perlin-noise:
cNoise m_Noise1;
cNoise m_Noise2;
cNoise m_Noise3;
cNoise m_Noise4;
cNoise m_Noise5;
cNoise m_Noise6;
int m_Seed;
int m_OceanCellSize;
int m_MushroomIslandSize;