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Added a voronoi biome generator (#180)

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git-svn-id: http://mc-server.googlecode.com/svn/trunk@511 0a769ca7-a7f5-676a-18bf-c427514a06d6
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madmaxoft@gmail.com
2012-05-27 14:17:47 +00:00
parent fbc497b97d
commit 79fddd3be0
3 changed files with 91 additions and 0 deletions
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57
source/BioGen.cpp
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@@ -120,3 +120,60 @@ void cBioGenCheckerboard::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::Biome
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cBioGenVoronoi :
void cBioGenVoronoi::GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap)
{
int BaseZ = cChunkDef::Width * a_ChunkZ;
int BaseX = cChunkDef::Width * a_ChunkX;
for (int z = 0; z < cChunkDef::Width; z++)
{
int AbsoluteZ = BaseZ + z;
for (int x = 0; x < cChunkDef::Width; x++)
{
cChunkDef::SetBiome(a_BiomeMap, x, z, VoronoiBiome(BaseX + x, AbsoluteZ));
} // for x
} // for z
}
EMCSBiome cBioGenVoronoi::VoronoiBiome(int a_BlockX, int a_BlockZ)
{
int CellX = a_BlockX / m_CellSize;
int CellZ = a_BlockZ / m_CellSize;
// Note that Noise values need to be divided by 8 to gain a uniform modulo-2^n distribution
// Get 5x5 neighboring cell seeds, compare distance to each. Return the biome in the minumim-distance cell
double MinDist = m_CellSize * m_CellSize; // There has to be a cell closer than this
EMCSBiome res = biPlains; // Will be overriden
for (int x = CellX - 2; x <= CellX + 2; x++)
{
int BaseX = x * m_CellSize;
for (int z = CellZ - 2; z < CellZ + 2; z++)
{
int OffsetX = (m_Noise.IntNoise3DInt(x, 16 * x + 32 * z, z) / 8) % m_CellSize;
int OffsetZ = (m_Noise.IntNoise3DInt(x, 32 * x - 16 * z, z) / 8) % m_CellSize;
int SeedX = BaseX + OffsetX;
int SeedZ = z * m_CellSize + OffsetZ;
double Dist = sqrt((double)((SeedX - a_BlockX) * (SeedX - a_BlockX) + (SeedZ - a_BlockZ) * (SeedZ - a_BlockZ)));
if (Dist < MinDist)
{
MinDist = Dist;
res = m_Biomes[(m_Noise.IntNoise3DInt(x, x - z + 1000, z) / 8) % m_BiomesCount];
}
} // for z
} // for x
return res;
}