/** Returns the pattern to use for an ocean floor in the specified column.
The returned pattern is guaranteed to be 256 blocks long. */
const cPattern::BlockInfo * ChooseOceanFloorPattern(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ)
{
// Frequencies for the ocean floor selecting noise:
const NOISE_DATATYPE FrequencyX = 3;
const NOISE_DATATYPE FrequencyZ = 3;
// Select the ocean-floor pattern to use:
NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkX * cChunkDef::Width + a_RelX)) / FrequencyX;
NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkZ * cChunkDef::Width + a_RelZ)) / FrequencyZ;
NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
if (Val < -0.95)
{
return patOFClay.Get();
}
else if (Val < 0)
{
return patOFSand.Get();
}
else
{
return patDirt.Get();
}
}
/** Fills the specified column with mesa pattern, based on the column height */
void FillColumnMesa(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const Byte * a_ShapeColumn)
{
// Frequencies for the clay floor noise:
const NOISE_DATATYPE FrequencyX = 50;
const NOISE_DATATYPE FrequencyZ = 50;
int Top = a_ChunkDesc.GetHeight(a_RelX, a_RelZ);
if (Top < m_SeaLevel)
{
// The terrain is below sealevel, handle as regular ocean with red sand floor:
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patOFOrangeClay.Get(), a_ShapeColumn);
return;
}
NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
int ClayFloor = m_SeaLevel - 6 + (int)(4.f * m_MesaFloor.CubicNoise2D(NoiseX, NoiseY));
if (ClayFloor >= Top)
{
ClayFloor = Top - 1;
}
if (Top - m_SeaLevel < 5)
{
// Simple case: top is red sand, then hardened clay down to ClayFloor, then stone:
a_ChunkDesc.SetBlockTypeMeta(a_RelX, Top, a_RelZ, E_BLOCK_SAND, E_META_SAND_RED);
for (int y = Top - 1; y >= ClayFloor; y--)
{
a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_HARDENED_CLAY);
}
for (int y = ClayFloor - 1; y > 0; y--)
{
a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STONE);
}
a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
return;
}
// Difficult case: use the mesa pattern and watch for overhangs:
int PatternIdx = cChunkDef::Height - (Top - ClayFloor); // We want the block at index ClayFloor to be pattern's 256th block (first stone)
const cPattern::BlockInfo * Pattern = m_MesaPattern;
bool HasHadWater = false;
for (int y = Top; y > 0; y--)
{
if (a_ShapeColumn[y] > 0)
{
// "ground" part, use the pattern:
a_ChunkDesc.SetBlockTypeMeta(a_RelX, y, a_RelZ, Pattern[PatternIdx].m_BlockType, Pattern[PatternIdx].m_BlockMeta);
PatternIdx++;
continue;
}
if (y >= m_SeaLevel)
{
// "air" part, do nothing
continue;
}
// "water" part, fill with water and choose new pattern for ocean floor, if not chosen already:
PatternIdx = 0;
a_ChunkDesc.SetBlockType(a_RelX, y, a_RelZ, E_BLOCK_STATIONARY_WATER);
if (HasHadWater)
{
continue;
}
// Select the ocean-floor pattern to use:
Pattern = ChooseOceanFloorPattern(a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ(), a_RelX, a_RelZ);
HasHadWater = true;
} // for y
a_ChunkDesc.SetBlockType(a_RelX, 0, a_RelZ, E_BLOCK_BEDROCK);
EMCSBiome MesaVersion = a_ChunkDesc.GetBiome(a_RelX, a_RelZ);
if ((MesaVersion == biMesaPlateauF) || (MesaVersion == biMesaPlateauFM))
{
if (Top < 95 + static_cast<int>(m_MesaFloor.CubicNoise2D(NoiseY * 2, NoiseX * 2) * 6))
{
return;
}
BLOCKTYPE Block = (m_MesaFloor.CubicNoise2D(NoiseX * 4, NoiseY * 4) < 0) ? E_BLOCK_DIRT : E_BLOCK_GRASS;
NIBBLETYPE Meta = (Block == E_BLOCK_GRASS) ? 0 : 1;
a_ChunkDesc.SetBlockTypeMeta(a_RelX, Top, a_RelZ, Block, Meta);
}
}
/** Composes a single column in a_ChunkDesc. Chooses what to do based on the biome in that column. */
void ComposeColumn(cChunkDesc & a_ChunkDesc, int a_RelX, int a_RelZ, const Byte * a_ShapeColumn)
{
// Frequencies for the podzol floor selecting noise:
const NOISE_DATATYPE FrequencyX = 8;
const NOISE_DATATYPE FrequencyZ = 8;
EMCSBiome Biome = a_ChunkDesc.GetBiome(a_RelX, a_RelZ);
switch (Biome)
{
case biOcean:
case biPlains:
case biForest:
case biTaiga:
case biSwampland:
case biRiver:
case biFrozenOcean:
case biFrozenRiver:
case biIcePlains:
case biIceMountains:
case biForestHills:
case biTaigaHills:
case biExtremeHillsEdge:
case biExtremeHillsPlus:
case biExtremeHills:
case biJungle:
case biJungleHills:
case biJungleEdge:
case biDeepOcean:
case biStoneBeach:
case biColdBeach:
case biBirchForest:
case biBirchForestHills:
case biRoofedForest:
case biColdTaiga:
case biColdTaigaHills:
case biSavanna:
case biSavannaPlateau:
case biSunflowerPlains:
case biFlowerForest:
case biTaigaM:
case biSwamplandM:
case biIcePlainsSpikes:
case biJungleM:
case biJungleEdgeM:
case biBirchForestM:
case biBirchForestHillsM:
case biRoofedForestM:
case biColdTaigaM:
case biSavannaM:
case biSavannaPlateauM:
{
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patGrass.Get(), a_ShapeColumn);
return;
}
case biMegaTaiga:
case biMegaTaigaHills:
case biMegaSpruceTaiga:
case biMegaSpruceTaigaHills:
{
// Select the pattern to use - podzol, grass or grassless dirt:
NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
const cPattern::BlockInfo * Pattern = (Val < -0.9) ? patGrassLess.Get() : ((Val > 0) ? patPodzol.Get() : patGrass.Get());
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern, a_ShapeColumn);
return;
}
case biDesertHills:
case biDesert:
case biDesertM:
case biBeach:
{
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patSand.Get(), a_ShapeColumn);
return;
}
case biMushroomIsland:
case biMushroomShore:
{
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, patMycelium.Get(), a_ShapeColumn);
return;
}
case biMesa:
case biMesaPlateauF:
case biMesaPlateau:
case biMesaBryce:
case biMesaPlateauFM:
case biMesaPlateauM:
{
// Mesa biomes need special handling, because they don't follow the usual "4 blocks from top pattern",
// instead, they provide a "from bottom" pattern with varying base height,
// usually 4 blocks below the ocean level
FillColumnMesa(a_ChunkDesc, a_RelX, a_RelZ, a_ShapeColumn);
return;
}
case biExtremeHillsPlusM:
case biExtremeHillsM:
{
// Select the pattern to use - gravel, stone or grass:
NOISE_DATATYPE NoiseX = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkX() * cChunkDef::Width + a_RelX)) / FrequencyX;
NOISE_DATATYPE NoiseY = ((NOISE_DATATYPE)(a_ChunkDesc.GetChunkZ() * cChunkDef::Width + a_RelZ)) / FrequencyZ;
NOISE_DATATYPE Val = m_OceanFloorSelect.CubicNoise2D(NoiseX, NoiseY);
const cPattern::BlockInfo * Pattern = (Val < 0.0) ? patStone.Get() : patGrass.Get();
FillColumnPattern(a_ChunkDesc, a_RelX, a_RelZ, Pattern, a_ShapeColumn);
return;
}
case biInvalidBiome:
case biHell:
case biSky:
case biNumBiomes:
case biVariant:
case biNumVariantBiomes:
{
ASSERT(!"Unhandled biome");
return;
}
} // switch (Biome)
}
