Floody fluid simulator can create sourceblocks (configurable in World.ini)

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1119 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/Simulator/FloodyFluidSimulator.cpp

@@ -26,9 +26,17 @@
 
 
 
-cFloodyFluidSimulator::cFloodyFluidSimulator(cWorld * a_World, BLOCKTYPE a_Fluid, BLOCKTYPE a_StationaryFluid, NIBBLETYPE a_Falloff, int a_TickDelay) :
+cFloodyFluidSimulator::cFloodyFluidSimulator(
+	cWorld * a_World,
+	BLOCKTYPE a_Fluid,
+	BLOCKTYPE a_StationaryFluid,
+	NIBBLETYPE a_Falloff,
+	int a_TickDelay,
+	int a_NumNeighborsForSource
+) :
 	super(a_World, a_Fluid, a_StationaryFluid, a_TickDelay),
-	m_Falloff(a_Falloff)
+	m_Falloff(a_Falloff),
+	m_NumNeighborsForSource(a_NumNeighborsForSource)
 {
 }
 
@@ -62,8 +70,10 @@ void cFloodyFluidSimulator::SimulateBlock(int a_BlockX, int a_BlockY, int a_Bloc
 
 	if (MyMeta != 0)
 	{
+		// Source blocks aren't checked for tributaries, others are.
 		if (CheckTributaries(a_BlockX, a_BlockY, a_BlockZ, Area, MyMeta))
 		{
+			// Has no tributary, has been decreased, no more processing needed (neighbors have been scheduled by the decrease)
 			return;
 		}
 	}
@@ -81,6 +91,19 @@ void cFloodyFluidSimulator::SimulateBlock(int a_BlockX, int a_BlockY, int a_Bloc
 	}
 	else if (NewMeta < 8)   // Can reach there
 	{
+		// If source creation is on, check for it here:
+		if (
+			(m_NumNeighborsForSource > 0) &&  // Source creation is on
+			(MyMeta == m_Falloff) &&          // Only exactly one block away from a source (fast bail-out)
+			!IsPassableForFluid(Below) &&     // Only exactly 1 block deep
+			CheckNeighborsForSource(a_BlockX, a_BlockY, a_BlockZ, Area)  // Did we create a source?
+		)
+		{
+			// We created a source, no more spreading is to be done now
+			// Also has been re-scheduled for ticking in the next wave
+			return;
+		}
+		
 		// Spread to the neighbors:
 		SpreadToNeighbor(a_BlockX - 1, a_BlockY, a_BlockZ,     Area, NewMeta);
 		SpreadToNeighbor(a_BlockX + 1, a_BlockY, a_BlockZ,     Area, NewMeta);
@@ -229,3 +252,46 @@ void cFloodyFluidSimulator::SpreadToNeighbor(int a_BlockX, int a_BlockY, int a_B
 
 
 
+
+bool cFloodyFluidSimulator::CheckNeighborsForSource(int a_BlockX, int a_BlockY, int a_BlockZ, const cBlockArea & a_Area)
+{
+	FLOG("  Checking neighbors for source creation");
+	
+	static const Vector3i NeighborCoords[] =
+	{
+		Vector3i(-1, 0, 0),
+		Vector3i( 1, 0, 0),
+		Vector3i( 0, 0,-1),
+		Vector3i( 0, 0, 1),
+	} ;
+	
+	int NumNeeded = m_NumNeighborsForSource;
+	for (int i = 0; i < ARRAYCOUNT(NeighborCoords); i++)
+	{
+		int x = a_BlockX + NeighborCoords[i].x;
+		int y = a_BlockY + NeighborCoords[i].y;
+		int z = a_BlockZ + NeighborCoords[i].z;
+		BLOCKTYPE BlockType;
+		NIBBLETYPE BlockMeta;
+		a_Area.GetBlockTypeMeta(x, y, z, BlockType, BlockMeta);
+		FLOG("   Neighbor at {%d, %d, %d}: %s", x, y, z, ItemToFullString(cItem(BlockType, 1, BlockMeta)).c_str());
+		if ((BlockMeta == 0) && IsAnyFluidBlock(BlockType))
+		{
+			NumNeeded--;
+			FLOG("    Found a neighbor source at {%d, %d, %d}, NumNeeded := %d", x, y, z, NumNeeded);
+			if (NumNeeded == 0)
+			{
+				// Found enough, turn into a source and bail out
+				FLOG("    Found enough neighbor sources, turning into a source");
+				m_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, m_FluidBlock, 0);
+				return true;
+			}
+		}
+	}
+	FLOG("    Not enough neighbors for turning into a source, NumNeeded = %d", NumNeeded);
+	return false;
+}
+
+
+
+

source/Simulator/FloodyFluidSimulator.h

@@ -29,10 +29,11 @@ class cFloodyFluidSimulator :
 	typedef cDelayedFluidSimulator super;
 	
 public:
-	cFloodyFluidSimulator(cWorld * a_World, BLOCKTYPE a_Fluid, BLOCKTYPE a_StationaryFluid, NIBBLETYPE a_Falloff, int a_TickDelay);
+	cFloodyFluidSimulator(cWorld * a_World, BLOCKTYPE a_Fluid, BLOCKTYPE a_StationaryFluid, NIBBLETYPE a_Falloff, int a_TickDelay, int a_NumNeighborsForSource);
 	
 protected:
 	NIBBLETYPE m_Falloff;
+	int        m_NumNeighborsForSource;
 	
 	// cDelayedFluidSimulator overrides:
 	virtual void SimulateBlock(int a_BlockX, int a_BlockY, int a_BlockZ) override;
@@ -40,8 +41,11 @@ protected:
 	/// Checks tributaries, if not fed, decreases the block's level and returns true
 	bool CheckTributaries(int a_BlockX, int a_BlockY, int a_BlockZ, const cBlockArea & a_Area, NIBBLETYPE a_MyMeta);
 
-	/// Spreads into the specified block, if the block there allows. a_Area is for checking.
+	/// Spreads into the specified block, if the blocktype there allows. a_Area is for checking.
 	void SpreadToNeighbor(int a_BlockX, int a_BlockY, int a_BlockZ, const cBlockArea & a_Area, NIBBLETYPE a_NewMeta);
+	
+	/// Checks if there are enough neighbors to create a source at the coords specified; turns into source and returns true if so
+	bool CheckNeighborsForSource(int a_BlockX, int a_BlockY, int a_BlockZ, const cBlockArea & a_Area);
 } ;
 
 

source/World.cpp

@@ -2249,11 +2249,10 @@ cFluidSimulator * cWorld::InitializeFluidSimulator(cIniFile & a_IniFile, const c
 	int Rate = 1;
 	if (NoCaseCompare(SimulatorName, "floody") == 0)
 	{
-		int DefaultFalloff   = IsWater ? 1 : 2;
+		int Falloff               = a_IniFile.GetValueSetI(SimulatorSectionName, "Falloff",               IsWater ? 1 : 2);
-		int DefaultTickDelay = IsWater ? 5 : 30;
+		int TickDelay             = a_IniFile.GetValueSetI(SimulatorSectionName, "TickDelay",             IsWater ? 5 : 30);
-		int Falloff   = a_IniFile.GetValueSetI(SimulatorSectionName, "Falloff",   DefaultFalloff);
+		int NumNeighborsForSource = a_IniFile.GetValueSetI(SimulatorSectionName, "NumNeighborsForSource", IsWater ? 2 : -1);
-		int TickDelay = a_IniFile.GetValueSetI(SimulatorSectionName, "TickDelay", DefaultTickDelay);
+		res = new cFloodyFluidSimulator(this, a_SimulateBlock, a_StationaryBlock, Falloff, TickDelay, NumNeighborsForSource);
-		res = new cFloodyFluidSimulator(this, a_SimulateBlock, a_StationaryBlock, Falloff, TickDelay);
 	}
 	else
 	{