6 files changed, 649 insertions, 267 deletions

diff --git a/src/Generating/ComposableGenerator.cpp b/src/Generating/ComposableGenerator.cpp
index eb1d0e1ee..fa8db8f93 100644
--- a/src/Generating/ComposableGenerator.cpp
+++ b/src/Generating/ComposableGenerator.cpp
@@ -330,6 +330,14 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		{
 			m_FinishGens.push_back(cFinishGenPtr(new cStructGenDirectOverhangs(Seed)));
 		}
+		else if (NoCaseCompare(*itr, "DirtPockets") == 0)
+		{
+			auto gen = std::make_shared<cFinishGenOrePockets>(Seed + 1, cFinishGenOrePockets::DefaultNaturalPatches());
+			if (gen->Initialize(a_IniFile, "DirtPockets"))
+			{
+				m_FinishGens.push_back(gen);
+			}
+		}
 		else if (NoCaseCompare(*itr, "DistortedMembraneOverhangs") == 0)
 		{
 			m_FinishGens.push_back(cFinishGenPtr(new cStructGenDistortedMembraneOverhangs(Seed)));
@@ -397,52 +405,7 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "NaturalPatches") == 0)
 		{
-			cStructGenOreNests::OreList Ores;
-
-			// Dirt vein
-			cStructGenOreNests::OreInfo DirtVein;
-			DirtVein.BlockType = E_BLOCK_DIRT;
-			DirtVein.MaxHeight = 127;
-			DirtVein.NumNests = 20;
-			DirtVein.NestSize = 32;
-			Ores.push_back(DirtVein);
-
-			// Gravel vein
-			cStructGenOreNests::OreInfo GravelVein;
-			GravelVein.BlockType = E_BLOCK_GRAVEL;
-			GravelVein.MaxHeight = 127;
-			GravelVein.NumNests = 20;
-			GravelVein.NestSize = 32;
-			Ores.push_back(GravelVein);
-
-			// Granite vein
-			cStructGenOreNests::OreInfo GraniteVein;
-			GraniteVein.BlockType = E_BLOCK_STONE;
-			GraniteVein.BlockMeta = 1;
-			GraniteVein.MaxHeight = 127;
-			GraniteVein.NumNests = 20;
-			GraniteVein.NestSize = 32;
-			Ores.push_back(GraniteVein);
-
-			// Diorite vein
-			cStructGenOreNests::OreInfo DioriteVein;
-			DioriteVein.BlockType = E_BLOCK_STONE;
-			DioriteVein.BlockMeta = 3;
-			DioriteVein.MaxHeight = 127;
-			DioriteVein.NumNests = 20;
-			DioriteVein.NestSize = 32;
-			Ores.push_back(DioriteVein);
-
-			// Andesite vein
-			cStructGenOreNests::OreInfo AndesiteVein;
-			AndesiteVein.BlockType = E_BLOCK_STONE;
-			AndesiteVein.BlockMeta = 5;
-			AndesiteVein.MaxHeight = 127;
-			AndesiteVein.NumNests = 20;
-			AndesiteVein.NestSize = 32;
-			Ores.push_back(AndesiteVein);
-
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenOreNests(Seed, Ores, E_BLOCK_STONE)));
+			m_FinishGens.push_back(std::make_shared<cFinishGenOreNests>(Seed + 1, cFinishGenOreNests::DefaultNaturalPatches()));
 		}
 		else if (NoCaseCompare(*itr, "NetherClumpFoliage") == 0)
 		{
@@ -457,72 +420,19 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "NetherOreNests") == 0)
 		{
-			cStructGenOreNests::OreList Ores;
-
-			// Quartz vein
-			cStructGenOreNests::OreInfo QuartzVein;
-			QuartzVein.BlockType = E_BLOCK_NETHER_QUARTZ_ORE;
-			QuartzVein.MaxHeight = 255;
-			QuartzVein.NumNests = 80;
-			QuartzVein.NestSize = 8;
-			Ores.push_back(QuartzVein);
-
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenOreNests(Seed, Ores, E_BLOCK_NETHERRACK)));
-
+			m_FinishGens.push_back(std::make_shared<cFinishGenOreNests>(Seed + 2, cFinishGenOreNests::DefaultNetherOres()));
 		}
 		else if (NoCaseCompare(*itr, "OreNests") == 0)
 		{
-			cStructGenOreNests::OreList Ores;
-
-			// Coal vein
-			cStructGenOreNests::OreInfo CoalVein;
-			CoalVein.BlockType = E_BLOCK_COAL_ORE;
-			CoalVein.MaxHeight = 127;
-			CoalVein.NumNests  = 50;
-			CoalVein.NestSize  = 10;
-			Ores.push_back(CoalVein);
-
-			// Iron vein
-			cStructGenOreNests::OreInfo IronVein;
-			IronVein.BlockType = E_BLOCK_IRON_ORE;
-			IronVein.MaxHeight = 64;
-			IronVein.NumNests  = 14;
-			IronVein.NestSize  = 6;
-			Ores.push_back(IronVein);
-
-			// Gold vein
-			cStructGenOreNests::OreInfo GoldVein;
-			GoldVein.BlockType = E_BLOCK_GOLD_ORE;
-			GoldVein.MaxHeight = 32;
-			GoldVein.NumNests = 2;
-			GoldVein.NestSize = 6;
-			Ores.push_back(GoldVein);
-
-			// Redstone vein
-			cStructGenOreNests::OreInfo RedstoneVein;
-			RedstoneVein.BlockType = E_BLOCK_REDSTONE_ORE;
-			RedstoneVein.MaxHeight = 16;
-			RedstoneVein.NumNests = 4;
-			RedstoneVein.NestSize = 6;
-			Ores.push_back(RedstoneVein);
-
-			// Lapis vein
-			cStructGenOreNests::OreInfo LapisVein;
-			LapisVein.BlockType = E_BLOCK_LAPIS_ORE;
-			LapisVein.MaxHeight = 30;
-			LapisVein.NumNests = 2;
-			LapisVein.NestSize = 5;
-			Ores.push_back(LapisVein);
-
-			// Diamond vein
-			cStructGenOreNests::OreInfo DiamondVein;
-			DiamondVein.BlockType = E_BLOCK_DIAMOND_ORE;
-			DiamondVein.MaxHeight = 15;
-			DiamondVein.NumNests = 1;
-			DiamondVein.NestSize = 4;
-			Ores.push_back(DiamondVein);
-
-			m_FinishGens.push_back(cFinishGenPtr(new cStructGenOreNests(Seed, Ores, E_BLOCK_STONE)));
+			m_FinishGens.push_back(std::make_shared<cFinishGenOreNests>(Seed + 3, cFinishGenOreNests::DefaultOverworldOres()));
+		}
+		else if (NoCaseCompare(*itr, "OrePockets") == 0)
+		{
+			auto gen = std::make_shared<cFinishGenOrePockets>(Seed + 2, cFinishGenOrePockets::DefaultOverworldOres());
+			if (gen->Initialize(a_IniFile, "OrePockets"))
+			{
+				m_FinishGens.push_back(gen);
+			}
 		}
 		else if (NoCaseCompare(*itr, "POCPieces") == 0)
 		{
diff --git a/src/Generating/FinishGen.cpp b/src/Generating/FinishGen.cpp
index 513c2bd49..6e833ad6d 100644
--- a/src/Generating/FinishGen.cpp
+++ b/src/Generating/FinishGen.cpp
@@ -1395,3 +1395,456 @@ eMonsterType cFinishGenPassiveMobs::GetRandomMob(cChunkDesc & a_ChunkDesc)
 
 
 
+
+////////////////////////////////////////////////////////////////////////////////
+// cFinishGenOres:
+
+void cFinishGenOres::GenFinish(cChunkDesc & a_ChunkDesc)
+{
+	int seq = 1;
+
+	// Generate the ores from the ore list.
+	for (const auto & ore: m_OreInfos)
+	{
+		GenerateOre(
+			a_ChunkDesc,
+			ore.m_BlockType, ore.m_BlockMeta,
+			ore.m_MaxHeight, ore.m_NumNests, ore.m_NestSize,
+			seq
+		);
+		seq++;
+	}
+}
+
+
+
+
+
+const cFinishGenOres::OreInfos & cFinishGenOres::DefaultOverworldOres(void)
+{
+	static OreInfos res
+	{
+		// OreType,            OreMeta, MaxHeight, NumNests, NestSize
+		{E_BLOCK_COAL_ORE,     0,       127,       20,       16},
+		{E_BLOCK_IRON_ORE,     0,        64,       20,        8},
+		{E_BLOCK_GOLD_ORE,     0,        32,        2,        8},
+		{E_BLOCK_REDSTONE_ORE, 0,        16,        8,        7},
+		{E_BLOCK_DIAMOND_ORE,  0,        15,        1,        7},
+		{E_BLOCK_LAPIS_ORE,    0,        30,        1,        6},
+	};
+	return res;
+}
+
+
+
+
+
+const cFinishGenOres::OreInfos & cFinishGenOres::DefaultNetherOres(void)
+{
+	static OreInfos res
+	{
+		// OreType,                 OreMeta, MaxHeight, NumNests, NestSize
+		{E_BLOCK_NETHER_QUARTZ_ORE, 0,       127,       20,       8},
+	};
+	return res;
+}
+
+
+
+
+
+const cFinishGenOres::OreInfos & cFinishGenOres::DefaultNaturalPatches(void)
+{
+	static OreInfos res
+	{
+		// OreType,      OreMeta,               MaxHeight, NumNests, NestSize
+		{E_BLOCK_DIRT,   0,                     127,       20,       32},
+		{E_BLOCK_GRAVEL, 0,                     127,       10,       32},
+		{E_BLOCK_STONE,  E_META_STONE_GRANITE,  127,       20,       32},
+		{E_BLOCK_STONE,  E_META_STONE_DIORITE,  127,       20,       32},
+		{E_BLOCK_STONE,  E_META_STONE_ANDESITE, 127,       20,       32},
+	};
+	return res;
+}
+
+
+
+
+
+cFinishGenOres::OreInfos cFinishGenOres::OreInfosFromString(const AString & a_OreInfosString)
+{
+	// The string is expected to be formatted as "<OreInfo1> | <OreInfo2> | <OreInfo3> | ..."
+	// Each OreInfo is expected to be formatted as "<OreType> : <OreMeta> : <MaxHeight> : <NumNests> : <NestSize>"
+
+	OreInfos res;
+	auto ores = StringSplitAndTrim(a_OreInfosString, "|");
+	for (const auto & ore: ores)
+	{
+		auto parts = StringSplitAndTrim(ore, ":");
+		if (parts.size() != 5)
+		{
+			LOGWARNING("Cannot parse ore information from string, not enough OreInfo members (exp 5, got %d). Offending item: \"%s\".",
+				static_cast<unsigned>(parts.size()), ore.c_str()
+			);
+			continue;
+		}
+		auto oreType = BlockStringToType(parts[0]);
+		if (oreType < 0)
+		{
+			LOGWARNING("Cannot parse ore information from string, invalid OreType: \"%s\".", parts[0].c_str());
+			continue;
+		}
+		NIBBLETYPE oreMeta;
+		int maxHeight, numNests, nestSize;
+		if (
+			!StringToInteger(parts[1], oreMeta) ||
+			!StringToInteger(parts[2], maxHeight) ||
+			!StringToInteger(parts[3], numNests) ||
+			!StringToInteger(parts[4], nestSize)
+		)
+		{
+			LOGWARNING("Cannot parse ore information from string, invalid number in OreInfo \"%s\".", ore.c_str());
+			continue;
+		}
+		res.emplace_back(oreType, oreMeta, maxHeight, numNests, nestSize);
+	}  // for i - split[]
+	return res;
+}
+
+
+
+
+
+AString cFinishGenOres::OreInfosToString(const cFinishGenOres::OreInfos & a_OreInfos)
+{
+	AString res;
+	for (const auto & ore: a_OreInfos)
+	{
+		if (!res.empty())
+		{
+			res.append(" | ");
+		}
+		AppendPrintf(res, "%s:%d:%d:%d:%d",
+			ItemTypeToString(ore.m_BlockType).c_str(), ore.m_BlockMeta,
+			ore.m_MaxHeight, ore.m_NumNests, ore.m_NestSize
+		);
+	}  // for ore - a_OreInfos[]
+	return res;
+}
+
+
+
+
+
+void cFinishGenOres::SetSeed(int a_Seed)
+{
+	m_Noise.SetSeed(a_Seed);
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cFinishGenOreNests:
+
+void cFinishGenOreNests::GenerateOre(
+	cChunkDesc & a_ChunkDesc,
+	BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+	int a_MaxHeight, int a_NumNests, int a_NestSize,
+	int a_Seq
+)
+{
+	// This function generates several "nests" of ore, each nest consisting of number of ore blocks relatively adjacent to each other.
+	// It does so by making a random XYZ walk and adding ore along the way in cuboids of different (random) sizes
+	// Only "terraformable" blocks get replaced with ore, all other blocks stay (so the nest can actually be smaller than specified).
+
+	auto chunkX = a_ChunkDesc.GetChunkX();
+	auto chunkZ = a_ChunkDesc.GetChunkZ();
+	auto & blockTypes = a_ChunkDesc.GetBlockTypes();
+	auto & blockMetas = a_ChunkDesc.GetBlockMetasUncompressed();
+	for (int i = 0; i < a_NumNests; i++)
+	{
+		int nestRnd = m_Noise.IntNoise3DInt(chunkX + i, a_Seq, chunkZ + 64 * i) / 8;
+		int BaseX = nestRnd % cChunkDef::Width;
+		nestRnd /= cChunkDef::Width;
+		int BaseZ = nestRnd % cChunkDef::Width;
+		nestRnd /= cChunkDef::Width;
+		int BaseY = nestRnd % a_MaxHeight;
+		nestRnd /= a_MaxHeight;
+		int NestSize = a_NestSize + (nestRnd % (a_NestSize / 4));  // The actual nest size may be up to 1 / 4 larger
+		int Num = 0;
+		while (Num < NestSize)
+		{
+			// Put a cuboid around [BaseX, BaseY, BaseZ]
+			int rnd = m_Noise.IntNoise3DInt(chunkX + 64 * i, 2 * a_Seq + Num, chunkZ + 32 * i) / 8;
+			int xsize = rnd % 2;
+			int ysize = (rnd / 4) % 2;
+			int zsize = (rnd / 16) % 2;
+			rnd >>= 8;
+			for (int x = xsize; x >= 0; --x)
+			{
+				int BlockX = BaseX + x;
+				if (cChunkDef::IsValidWidth(BlockX))
+				{
+					Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
+					continue;
+				}
+				for (int y = ysize; y >= 0; --y)
+				{
+					int BlockY = BaseY + y;
+					if (!cChunkDef::IsValidHeight(BlockY))
+					{
+						Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
+						continue;
+					}
+					for (int z = zsize; z >= 0; --z)
+					{
+						int BlockZ = BaseZ + z;
+						if (cChunkDef::IsValidWidth(BlockZ))
+						{
+							Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
+							continue;
+						}
+
+						int Index = cChunkDef::MakeIndexNoCheck(BlockX, BlockY, BlockZ);
+						auto blockType = blockTypes[Index];
+						if ((blockType == E_BLOCK_STONE) || (blockType == E_BLOCK_NETHERRACK))
+						{
+							blockTypes[Index] = a_OreType;
+							blockMetas[Index] = a_OreMeta;
+						}
+						Num++;
+					}  // for z
+				}  // for y
+			}  // for x
+
+			// Move the base to a neighbor voxel
+			switch (rnd % 4)
+			{
+				case 0: BaseX--; break;
+				case 1: BaseX++; break;
+			}
+			switch ((rnd >> 3) % 4)
+			{
+				case 0: BaseY--; break;
+				case 1: BaseY++; break;
+			}
+			switch ((rnd >> 6) % 4)
+			{
+				case 0: BaseZ--; break;
+				case 1: BaseZ++; break;
+			}
+		}  // while (Num < NumBlocks)
+	}  // for i - NumNests
+}
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// cFinishGenOrePockets:
+
+bool cFinishGenOrePockets::Initialize(cIniFile & a_IniFile, const AString & a_GenName)
+{
+	// Read the OreInfos configuration:
+	auto valueName = a_GenName + "_blocks";
+	auto pocketCfg = a_IniFile.GetValue("Generator", valueName, "");
+	if (pocketCfg.empty())
+	{
+		// There's no config currently stored in the INI file. Store the defaults as the config:
+		a_IniFile.SetValue("Generator", valueName, OreInfosToString(m_OreInfos));
+	}
+	else
+	{
+		m_OreInfos = OreInfosFromString(pocketCfg);
+	}
+
+	// Read the optional seed configuration (but do not store the default):
+	valueName = a_GenName + "_seed";
+	SetSeed(a_IniFile.GetValueI("Generator", valueName, m_Noise.GetSeed()));
+
+	return true;
+}
+
+
+
+
+
+void cFinishGenOrePockets::GenerateOre(
+	cChunkDesc & a_ChunkDesc,
+	BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+	int a_MaxHeight, int a_NumNests, int a_NestSize,
+	int a_Seq
+)
+{
+	// This function generates several "pockets" of the specified ore
+	// Each chunk can contain only pockets that are generated for that chunk, or for its XM / ZM neighbors.
+
+	// Generate for the 3 neighbors in the XP / ZP direction as well, so that pockets crossing the boundaries are accounted for as well:
+	int chunkZ = a_ChunkDesc.GetChunkZ();
+	int chunkX = a_ChunkDesc.GetChunkX();
+	imprintChunkOrePockets(chunkX - 1, chunkZ - 1, a_ChunkDesc, a_OreType, a_OreMeta, a_MaxHeight, a_NumNests, a_NestSize, a_Seq);
+	imprintChunkOrePockets(chunkX - 1, chunkZ,     a_ChunkDesc, a_OreType, a_OreMeta, a_MaxHeight, a_NumNests, a_NestSize, a_Seq);
+	imprintChunkOrePockets(chunkX,     chunkZ - 1, a_ChunkDesc, a_OreType, a_OreMeta, a_MaxHeight, a_NumNests, a_NestSize, a_Seq);
+	imprintChunkOrePockets(chunkX,     chunkZ,     a_ChunkDesc, a_OreType, a_OreMeta, a_MaxHeight, a_NumNests, a_NestSize, a_Seq);
+}
+
+
+
+
+
+void cFinishGenOrePockets::imprintChunkOrePockets(
+	int a_ChunkX, int a_ChunkZ,
+	cChunkDesc & a_ChunkDesc,
+	BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+	int a_MaxHeight, int a_NumNests, int a_NestSize,
+	int a_Seq
+)
+{
+	// Pick a starting coord for each nest:
+	int baseBlockX = a_ChunkX * cChunkDef::Width;
+	int baseBlockZ = a_ChunkZ * cChunkDef::Width;
+	for (int i = 0; i < a_NumNests; i++)
+	{
+		int nestRnd = m_Noise.IntNoise3DInt(a_ChunkX + i, a_Seq, a_ChunkZ + 64 * i) / 7;
+		int baseX = (nestRnd % cChunkDef::Width) + baseBlockX;
+		nestRnd /= cChunkDef::Width;
+		int baseZ = (nestRnd % cChunkDef::Width) + baseBlockZ;
+		nestRnd /= cChunkDef::Width;
+		int baseY = nestRnd % a_MaxHeight;
+		nestRnd /= a_MaxHeight;
+		imprintPocket(
+			a_ChunkDesc,
+			baseX, baseY, baseZ,
+			a_NestSize, i + 200 * a_Seq,
+			a_OreType, a_OreMeta
+		);
+	}  // for i - NumNests
+}
+
+
+
+
+
+void cFinishGenOrePockets::imprintPocket(
+	cChunkDesc & a_ChunkDesc,
+	int a_MinPocketX, int a_PocketY, int a_MinPocketZ,
+	int a_NestSize, int a_Seq,
+	BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta
+)
+{
+	// A line segment in a random direction is chosen. Then, several spheres are formed along this line segment,
+	// with their diameters diminishing towards the line ends (one half of a sinusoid)
+
+	double x1 = static_cast<double>(a_MinPocketX) + 0.5;
+	double y1 = static_cast<double>(a_PocketY)    + 0.5;
+	double z1 = static_cast<double>(a_MinPocketZ) + 0.5;
+	int rnd = m_Noise.IntNoise2DInt(a_MinPocketX + 7 * a_Seq, a_MinPocketZ + a_PocketY * 11) / 7;
+	double angle = static_cast<double>(rnd % 256) / (256.0 * M_PI / 2.0);  // range [0 .. pi / 2]
+	rnd /= 256;
+	double length = static_cast<double>(a_NestSize) / 4.0;
+	double x2 = x1 + sin(angle) * length;  // Always larger than x1
+	double z2 = z1 + cos(angle) * length;  // Always larger than z1
+	double y2 = y1 + static_cast<double>((rnd % 3) - 1);  // Up to 1 block away from y1
+
+	// Iterate over the line segment in a total of a_NestSize steps:
+	double stepX = (x2 - x1) / static_cast<double>(a_NestSize);
+	double stepY = (y2 - y1) / static_cast<double>(a_NestSize);
+	double stepZ = (z2 - z1) / static_cast<double>(a_NestSize);
+	double stepR = M_PI / static_cast<double>(a_NestSize);
+	double size = static_cast<double>(a_NestSize) / 16.0;
+	for (int i = 0; i < a_NestSize; ++i)
+	{
+		double iDbl = static_cast<double>(i);
+		double sphereX = x1 + stepX * iDbl;
+		double sphereY = y1 + stepY * iDbl;
+		double sphereZ = z1 + stepZ * iDbl;
+		double radius = (sin(stepR * iDbl) + 1.0) * size + 1.0;
+		imprintSphere(a_ChunkDesc, sphereX, sphereY, sphereZ, radius, a_OreType, a_OreMeta);
+	}  // for i
+}
+
+
+
+
+
+void cFinishGenOrePockets::imprintSphere(
+	cChunkDesc & a_ChunkDesc,
+	double a_SphereX, double a_SphereY, double a_SphereZ, double a_Radius,
+	BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta
+)
+{
+	// Get the sphere's bounding box, unioned with the chunk's bounding box (possibly empty):
+	int baseX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
+	int baseZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
+	int minX = std::max(FloorC(a_SphereX - a_Radius), baseX);
+	int minY = std::max(FloorC(a_SphereY - a_Radius), 0);
+	int minZ = std::max(FloorC(a_SphereZ - a_Radius), baseZ);
+	int maxX = std::min(CeilC(a_SphereX + a_Radius), baseX + cChunkDef::Width - 1);
+	int maxY = std::min(CeilC(a_SphereY + a_Radius), cChunkDef::Height - 1);
+	int maxZ = std::min(CeilC(a_SphereZ + a_Radius), baseZ + cChunkDef::Width - 1);
+
+	/*
+	// DEBUG:
+	int blockX = FloorC(a_SphereX);
+	int blockY = FloorC(a_SphereY);
+	int blockZ = FloorC(a_SphereZ);
+	if (
+		(blockX >= baseX) && (blockX < baseX + cChunkDef::Width) &&
+		(blockY >= 0) && (blockY < cChunkDef::Height) &&
+		(blockZ >= baseZ) && (blockZ < baseZ + cChunkDef::Width)
+	)
+	{
+		// LOGD("Imprinting a sphere center at {%d, %d, %d}", blockX, blockY, blockZ);
+		a_ChunkDesc.SetBlockTypeMeta(blockX - baseX, blockY, blockZ - baseZ, a_OreType, a_OreMeta);
+	}
+	return;
+	//*/
+
+	// Imprint the parts of the sphere intersecting the chunk:
+	double radiusSq = a_Radius * a_Radius / 4.0;
+	for (int y = minY; y <= maxY; y++)
+	{
+		double relY = static_cast<double>(y) + 0.5 - a_SphereY;
+		double relYSq = relY * relY;
+		if (relYSq > radiusSq)
+		{
+			// outside the sphere, bail out
+			continue;
+		}
+		for (int z = minZ; z <= maxZ; z++)
+		{
+			double relZ = static_cast<double>(z) + 0.5 - a_SphereZ;
+			double relZSq = relZ * relZ;
+			if (relZSq + relYSq > radiusSq)
+			{
+				// outside the sphere, bail out
+				continue;
+			}
+			for (int x = minX; x <= maxX; x++)
+			{
+				double relX = static_cast<double>(x) + 0.5 - a_SphereX;
+				double relXSq = relX * relX;
+				if (relZSq + relYSq + relXSq > radiusSq)
+				{
+					// outside the sphere, bail out
+					continue;
+				}
+				int bX = x - baseX;
+				int bZ = z - baseZ;
+				auto blockType = a_ChunkDesc.GetBlockType(bX, y, bZ);
+				if ((blockType == E_BLOCK_STONE) || (blockType == E_BLOCK_NETHERRACK))
+				{
+					a_ChunkDesc.SetBlockTypeMeta(bX, y, bZ, a_OreType, a_OreMeta);
+				}
+			}  // for x
+		}  // for z
+	}  // for y
+}
+
+
+
+
+
diff --git a/src/Generating/FinishGen.h b/src/Generating/FinishGen.h
index aa2d0a12d..464ed209f 100644
--- a/src/Generating/FinishGen.h
+++ b/src/Generating/FinishGen.h
@@ -398,3 +398,179 @@ protected:
 
 
 
+
+/** Base class for generators that have an ore list attached to them.
+Provides the storage and parsing for the ore list, as well as the generic plumbing for generating individual ores.
+Descendants should override GenerateOre() to provide the specific ore generation technique.
+Note that this class uses the "Nest" terminology for individual packs of ore, it doesn't imply any shape or algorithm. */
+class cFinishGenOres:
+	public cFinishGen
+{
+	typedef cFinishGen Super;
+
+public:
+	struct OreInfo
+	{
+		BLOCKTYPE  m_BlockType;  // The type of the nest.
+		NIBBLETYPE m_BlockMeta;  // The block meta
+		int        m_MaxHeight;  // The highest possible a nest can occur
+		int        m_NumNests;   // How many nests per chunk
+		int        m_NestSize;   // The amount of blocks a nest can have.
+
+		OreInfo() :
+			m_BlockType(0),
+			m_BlockMeta(0),
+			m_MaxHeight(0),
+			m_NumNests(0),
+			m_NestSize(0)
+		{
+		}
+
+		OreInfo(BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta, int a_MaxHeight, int a_NumNests, int a_NestSize) :
+			m_BlockType(a_OreType),
+			m_BlockMeta(a_OreMeta),
+			m_MaxHeight(a_MaxHeight),
+			m_NumNests(a_NumNests),
+			m_NestSize(a_NestSize)
+		{
+		}
+	};
+
+	typedef std::vector<OreInfo> OreInfos;
+
+	cFinishGenOres(int a_Seed, const OreInfos & a_OreInfos):
+		m_Noise(a_Seed),
+		m_OreInfos(a_OreInfos)
+	{
+	}
+
+	// cFinishGen overrides:
+	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
+
+	/** Returns a vector of OreInfo structures describing the default Overworld ores, usable in the constructor. */
+	static const OreInfos & DefaultOverworldOres(void);
+
+	/** Returns a vector of OreInfo structures describing the default Nether ores, usable in the constructor. */
+	static const OreInfos & DefaultNetherOres(void);
+
+	/** Returns a vector of OreInfo structures describing the default Overworld non-ore pockets (dirt, diorite etc), usable in the constructor. */
+	static const OreInfos & DefaultNaturalPatches(void);
+
+	/** Parses the parameter string into OreInfos array.
+	See OreInfosToString() for the complementary function.
+	Used for loading configuration from INI files. */
+	static OreInfos OreInfosFromString(const AString & a_OreInfosString);
+
+	/** Returns a string that represents the OreInfos given as the parameter.
+	See OreInfosFromString() for the complementary function.
+	Used for storing defaults in the INI file. */
+	static AString OreInfosToString(const OreInfos & a_OreInfos);
+
+	/** (Re-)sets the seed used by the internal generating mechanisms. */
+	void SetSeed(int a_Seed);
+
+protected:
+	/** The noise used for generating. */
+	cNoise m_Noise;
+
+	/** All the ores enabled in this generator. */
+	OreInfos m_OreInfos;
+
+
+	/** Generates a single ore in the specified chunk image.
+	a_Seq is the sequencing number (used as a complement to seed to make each ore in the same chunk have different nests) */
+	virtual void GenerateOre(
+		cChunkDesc & a_ChunkDesc,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+		int a_MaxHeight, int a_NumNests, int a_NestSize,
+		int a_Seq
+	) = 0;
+
+	// TODO: Helper function to parse a config string into m_OreInfos
+};
+
+
+
+
+
+class cFinishGenOreNests :
+	public cFinishGenOres
+{
+	typedef cFinishGenOres Super;
+
+public:
+	cFinishGenOreNests(int a_Seed, const OreInfos & a_OreInfos):
+		Super(a_Seed, a_OreInfos)
+	{}
+
+protected:
+
+	// cFinishGenOreClumps overrides:
+	virtual void GenerateOre(
+		cChunkDesc & a_ChunkDesc,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+		int a_MaxHeight, int a_NumNests, int a_NestSize,
+		int a_Seq
+	) override;
+} ;
+
+
+
+
+
+class cFinishGenOrePockets:
+	public cFinishGenOres
+{
+	typedef cFinishGenOres Super;
+
+public:
+	cFinishGenOrePockets(int a_Seed, const OreInfos & a_OreInfos):
+		Super(a_Seed, a_OreInfos)
+	{}
+
+	/** Reads the configuration from the specified INI file.
+	a_GenName is the name of the generator (this class may be used for OrePockets and DirtPockets, each has a different default).
+	Returns true on success, false and logs errors to console on failure. */
+	bool Initialize(cIniFile & a_IniFile, const AString & a_GenName);
+
+protected:
+
+	// cFinishGenOreClumps overrides:
+	virtual void GenerateOre(
+		cChunkDesc & a_ChunkDesc,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+		int a_MaxNestHeight, int a_NumNests, int a_NestSize,
+		int a_Seq
+	) override;
+
+	/** Calculates the pockets for the specified chunk and imprints them into the specified ChunkDesc (not necessarily the same chunk).
+	a_Seq is the sequence number of the ore, to provide another source of randomness. */
+	void imprintChunkOrePockets(
+		int a_ChunkX, int a_ChunkZ,
+		cChunkDesc & a_ChunkDesc,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta,
+		int a_MaxHeight, int a_NumNests, int a_NestSize,
+		int a_Seq
+	);
+
+	/** Imprints a single pocket of the specified ore at the specified coords into the chunk.
+	The pocket shape has its minimum X and Z coords specified, Y can be anywhere around the specified Y coord.
+	a_Seq is the sequence number of the ore, to provide another source of randomness. */
+	void imprintPocket(
+		cChunkDesc & a_ChunkDesc,
+		int a_MinPocketX, int a_PocketY, int a_MinPocketZ,
+		int a_NestSize, int a_Seq,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta
+	);
+
+	/** Imprints a single sphere of the specified ore at the specified coords. */
+	void imprintSphere(
+		cChunkDesc & a_ChunkDesc,
+		double a_SphereX, double a_SphereY, double a_SphereZ, double a_Radius,
+		BLOCKTYPE a_OreType, NIBBLETYPE a_OreMeta
+	);
+};
+
+
+
+
diff --git a/src/Generating/StructGen.cpp b/src/Generating/StructGen.cpp
index 3b04f66b7..29cab86f1 100644
--- a/src/Generating/StructGen.cpp
+++ b/src/Generating/StructGen.cpp
@@ -273,116 +273,6 @@ int cStructGenTrees::GetNumTrees(
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cStructGenOreNests:
-
-void cStructGenOreNests::GenFinish(cChunkDesc & a_ChunkDesc)
-{
-	int ChunkX = a_ChunkDesc.GetChunkX();
-	int ChunkZ = a_ChunkDesc.GetChunkZ();
-	cChunkDef::BlockTypes & BlockTypes = a_ChunkDesc.GetBlockTypes();
-	cChunkDesc::BlockNibbleBytes & BlockMetas = a_ChunkDesc.GetBlockMetasUncompressed();
-
-	int seq = 1;
-	
-	// Generate the ores from the ore list.
-	for (OreList::const_iterator itr = m_OreList.begin(); itr != m_OreList.end(); ++itr)
-	{
-		GenerateOre(ChunkX, ChunkZ, itr->BlockType, itr->BlockMeta, itr->MaxHeight, itr->NumNests, itr->NestSize, BlockTypes, BlockMetas, seq);
-		seq++;
-	}
-}
-
-
-
-
-
-void cStructGenOreNests::GenerateOre(int a_ChunkX, int a_ChunkZ, BLOCKTYPE a_OreType, NIBBLETYPE a_BlockMeta, int a_MaxHeight, int a_NumNests, int a_NestSize, cChunkDef::BlockTypes & a_BlockTypes, cChunkDesc::BlockNibbleBytes & a_BlockMetas, int a_Seq)
-{
-	// This function generates several "nests" of ore, each nest consisting of number of ore blocks relatively adjacent to each other.
-	// It does so by making a random XYZ walk and adding ore along the way in cuboids of different (random) sizes
-	// Only stone gets replaced with ore, all other blocks stay (so the nest can actually be smaller than specified).
-	
-	for (int i = 0; i < a_NumNests; i++)
-	{
-		int Nestrnd = m_Noise.IntNoise3DInt(a_ChunkX + i, a_Seq, a_ChunkZ + 64 * i) / 8;
-		int BaseX = Nestrnd % cChunkDef::Width;
-		Nestrnd /= cChunkDef::Width;
-		int BaseZ = Nestrnd % cChunkDef::Width;
-		Nestrnd /= cChunkDef::Width;
-		int BaseY = Nestrnd % a_MaxHeight;
-		Nestrnd /= a_MaxHeight;
-		int NestSize = a_NestSize + (Nestrnd % (a_NestSize / 4));  // The actual nest size may be up to 1 / 4 larger
-		int Num = 0;
-		while (Num < NestSize)
-		{
-			// Put a cuboid around [BaseX, BaseY, BaseZ]
-			int rnd = m_Noise.IntNoise3DInt(a_ChunkX + 64 * i, 2 * a_Seq + Num, a_ChunkZ + 32 * i) / 8;
-			int xsize = rnd % 2;
-			int ysize = (rnd / 4) % 2;
-			int zsize = (rnd / 16) % 2;
-			rnd >>= 8;
-			for (int x = xsize; x >= 0; --x)
-			{
-				int BlockX = BaseX + x;
-				if ((BlockX < 0) || (BlockX >= cChunkDef::Width))
-				{
-					Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
-					continue;
-				}
-				for (int y = ysize; y >= 0; --y)
-				{
-					int BlockY = BaseY + y;
-					if ((BlockY < 0) || (BlockY >= cChunkDef::Height))
-					{
-						Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
-						continue;
-					}
-					for (int z = zsize; z >= 0; --z)
-					{
-						int BlockZ = BaseZ + z;
-						if ((BlockZ < 0) || (BlockZ >= cChunkDef::Width))
-						{
-							Num++;  // So that the cycle finishes even if the base coords wander away from the chunk
-							continue;
-						}
-
-						int Index = cChunkDef::MakeIndexNoCheck(BlockX, BlockY, BlockZ);
-						if (a_BlockTypes[Index] == m_ToReplace)
-						{
-							a_BlockTypes[Index] = a_OreType;
-							a_BlockMetas[Index] = a_BlockMeta;
-						}
-						Num++;
-					}  // for z
-				}  // for y
-			}  // for x
-			
-			// Move the base to a neighbor voxel
-			switch (rnd % 4)
-			{
-				case 0: BaseX--; break;
-				case 1: BaseX++; break;
-			}
-			switch ((rnd >> 3) % 4)
-			{
-				case 0: BaseY--; break;
-				case 1: BaseY++; break;
-			}
-			switch ((rnd >> 6) % 4)
-			{
-				case 0: BaseZ--; break;
-				case 1: BaseZ++; break;
-			}
-		}  // while (Num < NumBlocks)
-	}  // for i - NumNests
-}
-
-
-
-
-
-
-////////////////////////////////////////////////////////////////////////////////
 // cStructGenLakes:
 
 void cStructGenLakes::GenFinish(cChunkDesc & a_ChunkDesc)
diff --git a/src/Generating/StructGen.h b/src/Generating/StructGen.h
index 796abf0f5..b5cfcb07c 100644
--- a/src/Generating/StructGen.h
+++ b/src/Generating/StructGen.h
@@ -72,54 +72,6 @@ protected:
 
 
 
-class cStructGenOreNests :
-	public cFinishGen
-{
-public:
-	struct OreInfo
-	{
-		BLOCKTYPE  BlockType;  // The type of the nest.
-		NIBBLETYPE BlockMeta;  // The block meta
-		int        MaxHeight;  // The highest possible a nest can occur
-		int        NumNests;   // How many nests per chunk
-		int        NestSize;   // The amount of blocks a nest can have.
-
-		OreInfo() :
-			BlockType(0),
-			BlockMeta(0),
-			MaxHeight(0),
-			NumNests(0),
-			NestSize(0)
-		{
-		}
-	};
-
-	typedef std::vector<OreInfo> OreList;
-
-	cStructGenOreNests(int a_Seed, OreList a_OreList, BLOCKTYPE a_ToReplace) :
-		m_Noise(a_Seed),
-		m_Seed(a_Seed),
-		m_OreList(a_OreList),
-		m_ToReplace(a_ToReplace)
-	{}
-
-protected:
-	cNoise  m_Noise;
-	int     m_Seed;
-
-	OreList   m_OreList;  // A list of possible ores.
-	BLOCKTYPE m_ToReplace;
-	
-	// cFinishGen override:
-	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;
-	
-	void GenerateOre(int a_ChunkX, int a_ChunkZ, BLOCKTYPE a_OreType, NIBBLETYPE a_BlockMeta, int a_MaxHeight, int a_NumNests, int a_NestSize, cChunkDef::BlockTypes & a_BlockTypes, cChunkDesc::BlockNibbleBytes & a_BlockMetas, int a_Seq);
-} ;
-
-
-
-
-
 class cStructGenLakes :
 	public cFinishGen
 {
diff --git a/src/Noise/Noise.h b/src/Noise/Noise.h
index b08b96e24..4c99cee5b 100644
--- a/src/Noise/Noise.h
+++ b/src/Noise/Noise.h
@@ -49,6 +49,7 @@ public:
 	NOISE_DATATYPE CubicNoise3D (NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z) const;
 
 	void SetSeed(int a_Seed) { m_Seed = a_Seed; }
+	int GetSeed(void) const { return m_Seed; }
 
 	inline static NOISE_DATATYPE CubicInterpolate (NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_C, NOISE_DATATYPE a_D, NOISE_DATATYPE a_Pct);
 	inline static NOISE_DATATYPE CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct);