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Added the initial version of DirectOverhangs

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1411 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com 2013-04-24 20:30:30 +00:00
parent 2fa4993cad
commit 7387f05650
3 changed files with 138 additions and 0 deletions

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@ -356,6 +356,10 @@ void cComposableGenerator::InitStructureGens(cIniFile & a_IniFile)
float Threshold = (float)a_IniFile.GetValueSetF("Generator", "DualRidgeCavesThreshold", 0.3);
m_StructureGens.push_back(new cStructGenDualRidgeCaves(Seed, Threshold));
}
else if (NoCaseCompare(*itr, "DirectOverhangs") == 0)
{
m_StructureGens.push_back(new cStructGenDirectOverhangs(Seed));
}
else if (NoCaseCompare(*itr, "LavaLakes") == 0)
{
int Probability = a_IniFile.GetValueSetI("Generator", "LavaLakesProbability", 10);

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@ -511,3 +511,117 @@ void cStructGenLakes::CreateLakeImage(int a_ChunkX, int a_ChunkZ, cBlockArea & a
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cStructGenBiomeOverhangs:
cStructGenDirectOverhangs::cStructGenDirectOverhangs(int a_Seed) :
m_Noise1(a_Seed),
m_Noise2(a_Seed + 1000)
{
}
void cStructGenDirectOverhangs::GenStructures(cChunkDesc & a_ChunkDesc)
{
// If there is no column of the wanted biome, bail out:
if (!HasWantedBiome(a_ChunkDesc))
{
return;
}
HEIGHTTYPE MaxHeight = a_ChunkDesc.GetMaxHeight();
const int SEGMENT_HEIGHT = 8;
const int INTERPOL_X = 16; // Must be a divisor of 16
const int INTERPOL_Z = 16; // Must be a divisor of 16
// Interpolate the chunk in 16 * SEGMENT_HEIGHT * 16 "segments", each SEGMENT_HEIGHT blocks high and each linearly interpolated separately.
// Have two buffers, one for the lowest floor and one for the highest floor, so that Y-interpolation can be done between them
// Then swap the buffers and use the previously-top one as the current-bottom, without recalculating it.
int FloorBuf1[17 * 17];
int FloorBuf2[17 * 17];
int * FloorHi = FloorBuf1;
int * FloorLo = FloorBuf2;
int BaseX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
int BaseZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
int BaseY = 63;
// Interpolate the lowest floor:
for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++)
{
FloorLo[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, BaseY, BaseZ + INTERPOL_Z * z) *
m_Noise2.IntNoise3DInt(BaseX + INTERPOL_X * x, BaseY, BaseZ + INTERPOL_Z * z) /
256;
} // for x, z - FloorLo[]
IntArrayLinearInterpolate2D(FloorLo, 17, 17, INTERPOL_X, INTERPOL_Z);
// Interpolate segments:
for (int Segment = BaseY; Segment < MaxHeight; Segment += SEGMENT_HEIGHT)
{
// First update the high floor:
for (int z = 0; z <= 16 / INTERPOL_Z; z++) for (int x = 0; x <= 16 / INTERPOL_X; x++)
{
FloorHi[INTERPOL_X * x + 17 * INTERPOL_Z * z] =
m_Noise1.IntNoise3DInt(BaseX + INTERPOL_X * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) *
m_Noise2.IntNoise3DInt(BaseX + INTERPOL_Z * x, Segment + SEGMENT_HEIGHT, BaseZ + INTERPOL_Z * z) /
256;
} // for x, z - FloorLo[]
IntArrayLinearInterpolate2D(FloorHi, 17, 17, INTERPOL_X, INTERPOL_Z);
// Interpolate between FloorLo and FloorHi:
for (int z = 0; z < 16; z++) for (int x = 0; x < 16; x++)
{
switch (a_ChunkDesc.GetBiome(x, z))
{
case biExtremeHills:
case biExtremeHillsEdge:
{
int Lo = FloorLo[x + 17 * z] / 256;
int Hi = FloorHi[x + 17 * z] / 256;
for (int y = 0; y < SEGMENT_HEIGHT; y++)
{
int Val = Lo + (Hi - Lo) * y / SEGMENT_HEIGHT;
if (Val < 0)
{
a_ChunkDesc.SetBlockType(x, y + Segment, z, E_BLOCK_AIR);
}
} // for y
break;
}
} // switch (biome)
} // for z, x
// Swap the floors:
std::swap(FloorLo, FloorHi);
}
}
bool cStructGenDirectOverhangs::HasWantedBiome(cChunkDesc & a_ChunkDesc) const
{
cChunkDef::BiomeMap & Biomes = a_ChunkDesc.GetBiomeMap();
for (int i = 0; i < ARRAYCOUNT(Biomes); i++)
{
switch (Biomes[i])
{
case biExtremeHills:
case biExtremeHillsEdge:
{
return true;
}
}
} // for i
return false;
}

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@ -123,3 +123,23 @@ protected:
class cStructGenDirectOverhangs :
public cStructureGen
{
public:
cStructGenDirectOverhangs(int a_Seed);
protected:
cNoise m_Noise1;
cNoise m_Noise2;
// cStructureGen override:
virtual void GenStructures(cChunkDesc & a_ChunkDesc) override;
bool HasWantedBiome(cChunkDesc & a_ChunkDesc) const;
} ;