3 files changed, 92 insertions, 22 deletions

diff --git a/src/Generating/ComposableGenerator.cpp b/src/Generating/ComposableGenerator.cpp
index 0d9bedf45..a0355ff8d 100644
--- a/src/Generating/ComposableGenerator.cpp
+++ b/src/Generating/ComposableGenerator.cpp
@@ -324,7 +324,25 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "DeadBushes") == 0)
 		{
-			m_FinishGens.push_back(new cFinishGenSingleBiomeSingleTopBlock(Seed, E_BLOCK_DEAD_BUSH, biDesert, 2, E_BLOCK_SAND, E_BLOCK_SAND));
+			// A list with all the allowed biomes.
+			cFinishGenSingleTopBlock::BiomeList AllowedBiomes;
+			AllowedBiomes.push_back(biDesert);
+			AllowedBiomes.push_back(biDesertHills);
+			AllowedBiomes.push_back(biDesertM);
+			AllowedBiomes.push_back(biMesa);
+			AllowedBiomes.push_back(biMesaBryce);
+			AllowedBiomes.push_back(biMesaPlateau);
+			AllowedBiomes.push_back(biMesaPlateauF);
+			AllowedBiomes.push_back(biMesaPlateauFM);
+			AllowedBiomes.push_back(biMesaPlateauM);
+
+			// A list with all the allowed blocks that can be below the dead bush.
+			cFinishGenSingleTopBlock::BlockList AllowedBlocks;
+			AllowedBlocks.push_back(E_BLOCK_SAND);
+			AllowedBlocks.push_back(E_BLOCK_HARDENED_CLAY);
+			AllowedBlocks.push_back(E_BLOCK_STAINED_CLAY);
+
+			m_FinishGens.push_back(new cFinishGenSingleTopBlock(Seed, E_BLOCK_DEAD_BUSH, AllowedBiomes, 2, AllowedBlocks));
 		}
 		else if (NoCaseCompare(*itr, "DirectOverhangs") == 0)
 		{
@@ -371,7 +389,17 @@ void cComposableGenerator::InitFinishGens(cIniFile & a_IniFile)
 		}
 		else if (NoCaseCompare(*itr, "Lilypads") == 0)
 		{
-			m_FinishGens.push_back(new cFinishGenSingleBiomeSingleTopBlock(Seed, E_BLOCK_LILY_PAD, biSwampland, 4, E_BLOCK_WATER, E_BLOCK_STATIONARY_WATER));
+			// A list with all the allowed biomes.
+			cFinishGenSingleTopBlock::BiomeList AllowedBiomes;
+			AllowedBiomes.push_back(biSwampland);
+			AllowedBiomes.push_back(biSwamplandM);
+
+			// A list with all the allowed blocks that can be below the lilypad.
+			cFinishGenSingleTopBlock::BlockList AllowedBlocks;
+			AllowedBlocks.push_back(E_BLOCK_WATER);
+			AllowedBlocks.push_back(E_BLOCK_STATIONARY_WATER);
+
+			m_FinishGens.push_back(new cFinishGenSingleTopBlock(Seed, E_BLOCK_LILY_PAD, AllowedBiomes, 4, AllowedBlocks));
 		}
 		else if (NoCaseCompare(*itr, "NetherClumpFoliage") == 0)
 		{
diff --git a/src/Generating/FinishGen.cpp b/src/Generating/FinishGen.cpp
index 9f0c8f3fa..842c9ccc5 100644
--- a/src/Generating/FinishGen.cpp
+++ b/src/Generating/FinishGen.cpp
@@ -454,14 +454,14 @@ void cFinishGenIce::GenFinish(cChunkDesc & a_ChunkDesc)
 
 
 ////////////////////////////////////////////////////////////////////////////////
-// cFinishGenLilypads:
+// cFinishGenSingleTopBlock:
 
-int cFinishGenSingleBiomeSingleTopBlock::GetNumToGen(const cChunkDef::BiomeMap & a_BiomeMap)
+int cFinishGenSingleTopBlock::GetNumToGen(const cChunkDef::BiomeMap & a_BiomeMap)
 {
 	int res = 0;
 	for (size_t i = 0; i < ARRAYCOUNT(a_BiomeMap); i++)
 	{
-		if (a_BiomeMap[i] == m_Biome)
+		if (IsAllowedBiome(a_BiomeMap[i]))
 		{
 			res++;
 		}
@@ -473,7 +473,7 @@ int cFinishGenSingleBiomeSingleTopBlock::GetNumToGen(const cChunkDef::BiomeMap &
 
 
 
-void cFinishGenSingleBiomeSingleTopBlock::GenFinish(cChunkDesc & a_ChunkDesc)
+void cFinishGenSingleTopBlock::GenFinish(cChunkDesc & a_ChunkDesc)
 {
 	// Add Lilypads on top of water surface in Swampland
 
@@ -486,11 +486,13 @@ void cFinishGenSingleBiomeSingleTopBlock::GenFinish(cChunkDesc & a_ChunkDesc)
 		int z = (m_Noise.IntNoise3DInt(ChunkX - ChunkZ, i, ChunkZ) / 11) % cChunkDef::Width;
 
 		// Place the block at {x, z} if possible:
-		if (a_ChunkDesc.GetBiome(x, z) != m_Biome)
+		EMCSBiome Biome = a_ChunkDesc.GetBiome(x, z);
+		if (!IsAllowedBiome(Biome))
 		{
 			// Incorrect biome
 			continue;
 		}
+
 		int Height = a_ChunkDesc.GetHeight(x, z);
 		if (Height >= cChunkDef::Height)
 		{
@@ -502,13 +504,16 @@ void cFinishGenSingleBiomeSingleTopBlock::GenFinish(cChunkDesc & a_ChunkDesc)
 			// Not an empty block
 			continue;
 		}
+
 		BLOCKTYPE BlockBelow = a_ChunkDesc.GetBlockType(x, Height, z);
-		if ((BlockBelow == m_AllowedBelow1) || (BlockBelow == m_AllowedBelow2))
+		if (!IsAllowedBlockBelow(BlockBelow))
 		{
-			a_ChunkDesc.SetBlockType(x, Height + 1, z, m_BlockType);
-			a_ChunkDesc.SetHeight(x, z, Height + 1);
+			continue;
 		}
-	}  // for i
+
+		a_ChunkDesc.SetBlockType(x, Height + 1, z, m_BlockType);
+		a_ChunkDesc.SetHeight(x, z, Height + 1);
+	}
 }
 
 
diff --git a/src/Generating/FinishGen.h b/src/Generating/FinishGen.h
index 810bb4a91..ed32768b3 100644
--- a/src/Generating/FinishGen.h
+++ b/src/Generating/FinishGen.h
@@ -143,32 +143,69 @@ Used for:
 - Lilypads finisher
 - DeadBushes finisher
 */
-class cFinishGenSingleBiomeSingleTopBlock :
+class cFinishGenSingleTopBlock :
 	public cFinishGen
 {
 public:
-	cFinishGenSingleBiomeSingleTopBlock(
-		int a_Seed, BLOCKTYPE a_BlockType, EMCSBiome a_Biome, int a_Amount,
-		BLOCKTYPE a_AllowedBelow1, BLOCKTYPE a_AllowedBelow2
+	typedef std::vector<BLOCKTYPE> BlockList;
+	bool m_IsAllowedBelow[256];
+
+	typedef std::vector<EMCSBiome> BiomeList;
+	bool m_IsBiomeAllowed[256];
+
+
+	cFinishGenSingleTopBlock(
+		int a_Seed, BLOCKTYPE a_BlockType, BiomeList a_Biomes, int a_Amount,
+		BlockList a_AllowedBelow
 	) :
 		m_Noise(a_Seed),
 		m_BlockType(a_BlockType),
-		m_Biome(a_Biome),
-		m_Amount(a_Amount),
-		m_AllowedBelow1(a_AllowedBelow1),
-		m_AllowedBelow2(a_AllowedBelow2)
+		m_Amount(a_Amount)
 	{
+		// Initialize all the block types.
+		for (int idx = 0; idx < ARRAYCOUNT(m_IsAllowedBelow); ++idx)
+		{
+			m_IsAllowedBelow[idx] = false;
+		}
+		
+		// Load the allowed blocks into m_IsAllowedBelow
+		for (BlockList::iterator itr = a_AllowedBelow.begin(); itr != a_AllowedBelow.end(); ++itr)
+		{
+			m_IsAllowedBelow[*itr] = true;
+		}
+		
+		// Initialize all the biome types.
+		for (int idx = 0; idx < ARRAYCOUNT(m_IsBiomeAllowed); ++idx)
+		{
+			m_IsBiomeAllowed[idx] = false;
+		}
+		
+		// Load the allowed biomes into m_IsBiomeAllowed
+		for (BiomeList::iterator itr = a_Biomes.begin(); itr != a_Biomes.end(); ++itr)
+		{
+			m_IsBiomeAllowed[*itr] = true;
+		}
 	}
 	
 protected:
 	cNoise m_Noise;
 	BLOCKTYPE m_BlockType;
-	EMCSBiome m_Biome;
 	int       m_Amount;         ///< Relative amount of blocks to try adding. 1 = one block per 256 biome columns.
-	BLOCKTYPE m_AllowedBelow1;  ///< First  of the two blocktypes that are allowed below m_BlockType
-	BLOCKTYPE m_AllowedBelow2;  ///< Second of the two blocktypes that are allowed below m_BlockType
 	
 	int GetNumToGen(const cChunkDef::BiomeMap & a_BiomeMap);
+
+	// Returns true if the given biome is a biome that is allowed.
+	inline bool IsAllowedBiome(EMCSBiome a_Biome)
+	{
+		return m_IsBiomeAllowed[a_Biome];
+	}
+
+	// Returns true if the given blocktype may be below m_BlockType
+	inline bool IsAllowedBlockBelow(BLOCKTYPE a_BlockBelow)
+	{
+		return m_IsAllowedBelow[a_BlockBelow];
+	}
+
 	
 	// cFinishGen override:
 	virtual void GenFinish(cChunkDesc & a_ChunkDesc) override;