5 files changed, 93 insertions, 8 deletions

diff --git a/src/Blocks/BlockFluid.h b/src/Blocks/BlockFluid.h
index 0db2f60c4..bce5064bc 100644
--- a/src/Blocks/BlockFluid.h
+++ b/src/Blocks/BlockFluid.h
@@ -54,3 +54,84 @@ public:
 
 
 
+
+class cBlockLavaHandler :
+	public cBlockFluidHandler
+{
+	typedef cBlockFluidHandler super;
+public:
+
+	cBlockLavaHandler(BLOCKTYPE a_BlockType) :
+		super(a_BlockType)
+	{
+	}
+	
+	
+	/// Called to tick the block
+	virtual void OnUpdate(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ) override
+	{
+		if (a_Chunk.GetWorld()->ShouldLavaSpawnFire())
+		{
+			// Try to start up to 5 fires:
+			for (int i = 0; i < 5; i++)
+			{
+				TryStartFireNear(a_RelX, a_RelY, a_RelZ, a_Chunk);
+			}
+		}
+	}
+	
+	
+	/// Tries to start a fire near the lava at given coords. Returns true if fire started.
+	static bool TryStartFireNear(int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk)
+	{
+		// Pick a block next to this lava block:
+		int rnd = a_Chunk.GetWorld()->GetTickRandomNumber(cChunkDef::NumBlocks * 8) / 7;
+		int x = (rnd % 3) - 1;         // -1 .. 1
+		int y = ((rnd / 4) % 4) - 1;   // -1 .. 2
+		int z = ((rnd / 16) % 3) - 1;  // -1 .. 1
+		
+		// Check if it's fuel:
+		BLOCKTYPE BlockType;
+		if (
+			!a_Chunk.UnboundedRelGetBlockType(a_RelX + x, a_RelY + y, a_RelZ + z, BlockType) ||
+			!cFireSimulator::IsFuel(BlockType)
+		)
+		{
+			return false;
+		}
+		
+		// Try to set it on fire:
+		static struct
+		{
+			int x, y, z;
+		} CrossCoords[] =
+		{
+			{-1,  0,  0},
+			{ 1,  0,  0},
+			{ 0, -1,  0},
+			{ 0,  1,  0},
+			{ 0,  0, -1},
+			{ 0,  0,  1},
+		} ;
+		int RelX = a_RelX + x;
+		int RelY = a_RelY + y;
+		int RelZ = a_RelZ + z;
+		for (size_t i = 0; i < ARRAYCOUNT(CrossCoords); i++)
+		{
+			if (
+				a_Chunk.UnboundedRelGetBlockType(RelX + CrossCoords[i].x, RelY + CrossCoords[i].y, RelZ + CrossCoords[i].z, BlockType) &&
+				(BlockType == E_BLOCK_AIR)
+			)
+			{
+				// This is an air block next to a fuel next to lava, light it up:
+				a_Chunk.UnboundedRelSetBlock(RelX + CrossCoords[i].x, RelY + CrossCoords[i].y, RelZ + CrossCoords[i].z, E_BLOCK_FIRE, 0);
+				return true;
+			}
+		}  // for i - CrossCoords[]
+		return false;
+	}
+} ;
+
+
+
+
diff --git a/src/Blocks/BlockHandler.cpp b/src/Blocks/BlockHandler.cpp
index 7bb35efeb..4a6d49449 100644
--- a/src/Blocks/BlockHandler.cpp
+++ b/src/Blocks/BlockHandler.cpp
@@ -144,6 +144,7 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_INACTIVE_COMPARATOR:   return new cBlockComparatorHandler      (a_BlockType);
 		case E_BLOCK_IRON_DOOR:             return new cBlockDoorHandler            (a_BlockType);
 		case E_BLOCK_IRON_ORE:              return new cBlockOreHandler             (a_BlockType);
+		case E_BLOCK_JACK_O_LANTERN:        return new cBlockPumpkinHandler         (a_BlockType);
 		case E_BLOCK_JUKEBOX:               return new cBlockEntityHandler          (a_BlockType);
 		case E_BLOCK_JUNGLE_WOOD_STAIRS:    return new cBlockStairsHandler          (a_BlockType);
 		case E_BLOCK_LADDER:                return new cBlockLadderHandler          (a_BlockType);
@@ -157,18 +158,17 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_MELON_STEM:            return new cBlockStemsHandler           (a_BlockType);
 		case E_BLOCK_MYCELIUM:              return new cBlockMyceliumHandler        (a_BlockType);
 		case E_BLOCK_NETHER_BRICK_STAIRS:   return new cBlockStairsHandler          (a_BlockType);
+		case E_BLOCK_NETHER_PORTAL:         return new cBlockPortalHandler          (a_BlockType);
 		case E_BLOCK_NOTE_BLOCK:            return new cBlockNoteHandler            (a_BlockType);
 		case E_BLOCK_PISTON:                return new cBlockPistonHandler          (a_BlockType);
 		case E_BLOCK_PISTON_EXTENSION:      return new cBlockPistonHeadHandler      (           );
 		case E_BLOCK_PLANKS:                return new cBlockPlanksHandler          (a_BlockType);
-		case E_BLOCK_NETHER_PORTAL:         return new cBlockPortalHandler          (a_BlockType);
+		case E_BLOCK_POTATOES:              return new cBlockCropsHandler           (a_BlockType);
+		case E_BLOCK_POWERED_RAIL:          return new cBlockRailHandler            (a_BlockType);
 		case E_BLOCK_PUMPKIN:               return new cBlockPumpkinHandler         (a_BlockType);
-		case E_BLOCK_JACK_O_LANTERN:        return new cBlockPumpkinHandler         (a_BlockType);
 		case E_BLOCK_PUMPKIN_STEM:          return new cBlockStemsHandler           (a_BlockType);
 		case E_BLOCK_QUARTZ_STAIRS:         return new cBlockStairsHandler          (a_BlockType);
 		case E_BLOCK_RAIL:                  return new cBlockRailHandler            (a_BlockType);
-		case E_BLOCK_POTATOES:              return new cBlockCropsHandler           (a_BlockType);
-		case E_BLOCK_POWERED_RAIL:          return new cBlockRailHandler            (a_BlockType);
 		case E_BLOCK_REDSTONE_ORE:          return new cBlockOreHandler             (a_BlockType);
 		case E_BLOCK_REDSTONE_ORE_GLOWING:  return new cBlockOreHandler             (a_BlockType);
 		case E_BLOCK_REDSTONE_REPEATER_OFF: return new cBlockRedstoneRepeaterHandler(a_BlockType);
@@ -184,8 +184,8 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_SIGN_POST:             return new cBlockSignHandler            (a_BlockType);
 		case E_BLOCK_SNOW:                  return new cBlockSnowHandler            (a_BlockType);
 		case E_BLOCK_SPRUCE_WOOD_STAIRS:    return new cBlockStairsHandler          (a_BlockType);
-		case E_BLOCK_STATIONARY_LAVA:       return new cBlockFluidHandler           (a_BlockType);
-		case E_BLOCK_STATIONARY_WATER:      return new cBlockFluidHandler           (a_BlockType);
+		case E_BLOCK_STATIONARY_LAVA:       return new cBlockLavaHandler            (a_BlockType);
+		case E_BLOCK_STATIONARY_WATER:      return new cBlockLavaHandler            (a_BlockType);
 		case E_BLOCK_STICKY_PISTON:         return new cBlockPistonHandler          (a_BlockType);
 		case E_BLOCK_STONE:                 return new cBlockStoneHandler           (a_BlockType);
 		case E_BLOCK_STONE_BRICK_STAIRS:    return new cBlockStairsHandler          (a_BlockType);
diff --git a/src/Simulator/FireSimulator.h b/src/Simulator/FireSimulator.h
index 0d8a548ef..a788ed327 100644
--- a/src/Simulator/FireSimulator.h
+++ b/src/Simulator/FireSimulator.h
@@ -27,8 +27,8 @@ public:
 
 	virtual bool IsAllowedBlock(BLOCKTYPE a_BlockType) override;
 
-	bool IsFuel   (BLOCKTYPE a_BlockType);
-	bool IsForever(BLOCKTYPE a_BlockType);
+	static bool IsFuel   (BLOCKTYPE a_BlockType);
+	static bool IsForever(BLOCKTYPE a_BlockType);
 
 protected:
 	/// Time (in msec) that a fire block takes to burn with a fuel block into the next step
diff --git a/src/World.cpp b/src/World.cpp
index bed5d6701..7982924ae 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -522,6 +522,7 @@ void cWorld::Start(void)
 	m_IsSugarcaneBonemealable   = IniFile.GetValueSetB("Plants",        "IsSugarcaneBonemealable",   false);
 	m_bEnabledPVP               = IniFile.GetValueSetB("PVP",           "Enabled",                   true);
 	m_IsDeepSnowEnabled         = IniFile.GetValueSetB("Physics",       "DeepSnow",                  false);
+	m_ShouldLavaSpawnFire       = IniFile.GetValueSetB("Physics",       "ShouldLavaSpawnFire",       true);
 
 	m_GameMode = (eGameMode)IniFile.GetValueSetI("GameMode", "GameMode", m_GameMode);
 
diff --git a/src/World.h b/src/World.h
index a6b61f2e2..ea0db53e6 100644
--- a/src/World.h
+++ b/src/World.h
@@ -129,6 +129,8 @@ public:
 	bool IsPVPEnabled(void) const { return m_bEnabledPVP; }
 	bool IsDeepSnowEnabled(void) const { return m_IsDeepSnowEnabled; }
 	
+	bool ShouldLavaSpawnFire(void) const { return m_ShouldLavaSpawnFire; }
+	
 	eDimension GetDimension(void) const { return m_Dimension; }
 
 	/// Returns the world height at the specified coords; waits for the chunk to get loaded / generated
@@ -654,6 +656,7 @@ private:
 	eGameMode m_GameMode;
 	bool m_bEnabledPVP;
 	bool m_IsDeepSnowEnabled;
+	bool m_ShouldLavaSpawnFire;
 
 	// The cRedstone class simulates redstone and needs access to m_RSList
 	// friend class cRedstone;