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HeiGenBiomal: interpolate in 4x4 blocks on float values 

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1406 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com 2013-04-22 20:12:04 +00:00
parent 9fdc7219f0
commit 0e7b64eed2
2 changed files with 17 additions and 15 deletions
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30
source/Generating/HeiGen.cpp
View File

@ -234,12 +234,12 @@ void cHeiGenBiomal::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMa
resulting in speed DEcrease.
*/
/*
//*
// Linearly interpolate 4x4 blocks of heightmap:
// This is fast, but really ugly! Do not use!
// Must be done on a floating point datatype, else the results are ugly!
const int STEPZ = 4; // Must be a divisor of 16
const int STEPX = 4; // Must be a divisor of 16
int Height[17 * 17];
NOISE_DATATYPE Height[17 * 17];
for (int z = 0; z < 17; z += STEPZ)
{
for (int x = 0; x < 17; x += STEPX)
@ -247,18 +247,19 @@ void cHeiGenBiomal::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMa
Height[x + 17 * z] = GetHeightAt(x, z, a_ChunkX, a_ChunkZ, Biomes);
}
}
IntArrayLinearInterpolate2D(Height, 17, 17, STEPX, STEPZ);
ArrayLinearInterpolate2D(Height, 17, 17, STEPX, STEPZ);
// Copy into the heightmap
for (int z = 0; z < cChunkDef::Width; z++)
{
for (int x = 0; x < cChunkDef::Width; x++)
{
cChunkDef::SetHeight(a_HeightMap, x, z, Height[x + 17 * z]);
cChunkDef::SetHeight(a_HeightMap, x, z, (int)Height[x + 17 * z]);
}
}
*/
//*/
/*
// For each height, go through neighboring biomes and add up their idea of height:
for (int z = 0; z < cChunkDef::Width; z++)
{
@ -267,13 +268,14 @@ void cHeiGenBiomal::GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMa
cChunkDef::SetHeight(a_HeightMap, x, z, GetHeightAt(x, z, a_ChunkX, a_ChunkZ, Biomes));
} // for x
}
//*/
}
HEIGHTTYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const cHeiGenBiomal::BiomeNeighbors & a_BiomeNeighbors)
NOISE_DATATYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const cHeiGenBiomal::BiomeNeighbors & a_BiomeNeighbors)
{
// Sum up how many biomes of each type there are in the neighborhood:
int BiomeCounts[biNumBiomes];
@ -304,7 +306,7 @@ HEIGHTTYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int
// For each biome type that has a nonzero count, calc its height and add it:
if (Sum > 0)
{
int Height = 0;
NOISE_DATATYPE Height = 0;
int BlockX = a_ChunkX * cChunkDef::Width + a_RelX;
int BlockZ = a_ChunkZ * cChunkDef::Width + a_RelZ;
for (int i = 0; i < ARRAYCOUNT(BiomeCounts); i++)
@ -313,13 +315,13 @@ HEIGHTTYPE cHeiGenBiomal::GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int
{
continue;
}
float oct1 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq1, BlockZ * m_GenParam[i].m_HeightFreq1) * m_GenParam[i].m_HeightAmp1;
float oct2 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq2, BlockZ * m_GenParam[i].m_HeightFreq2) * m_GenParam[i].m_HeightAmp2;
float oct3 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq3, BlockZ * m_GenParam[i].m_HeightFreq3) * m_GenParam[i].m_HeightAmp3;
Height += BiomeCounts[i] * (int)(m_GenParam[i].m_BaseHeight + oct1 + oct2 + oct3);
NOISE_DATATYPE oct1 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq1, BlockZ * m_GenParam[i].m_HeightFreq1) * m_GenParam[i].m_HeightAmp1;
NOISE_DATATYPE oct2 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq2, BlockZ * m_GenParam[i].m_HeightFreq2) * m_GenParam[i].m_HeightAmp2;
NOISE_DATATYPE oct3 = m_Noise.CubicNoise2D(BlockX * m_GenParam[i].m_HeightFreq3, BlockZ * m_GenParam[i].m_HeightFreq3) * m_GenParam[i].m_HeightAmp3;
Height += BiomeCounts[i] * (m_GenParam[i].m_BaseHeight + oct1 + oct2 + oct3);
}
int res = (HEIGHTTYPE)(Height / Sum);
return std::min(250, std::max(res, 5));
NOISE_DATATYPE res = Height / Sum;
return std::min((NOISE_DATATYPE)250, std::max(res, (NOISE_DATATYPE)5));
}
// No known biome around? Weird. Return a bogus value:

2
source/Generating/HeiGen.h
View File

@ -129,7 +129,7 @@ protected:
// cTerrainHeightGen override:
virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
HEIGHTTYPE GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const BiomeNeighbors & a_BiomeNeighbors);
NOISE_DATATYPE GetHeightAt(int a_RelX, int a_RelZ, int a_ChunkX, int a_ChunkZ, const BiomeNeighbors & a_BiomeNeighbors);
} ;