1 files changed, 133 insertions, 0 deletions

diff --git a/source/FireSimulator.cpp b/source/FireSimulator.cpp
new file mode 100644
index 000000000..9a08524ef
--- /dev/null
+++ b/source/FireSimulator.cpp
@@ -0,0 +1,133 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "FireSimulator.h"
+#include "World.h"
+#include "Vector3i.h"
+#include "BlockID.h"
+#include "Defines.h"
+
+cFireSimulator::cFireSimulator( cWorld* a_World )
+	: cSimulator(a_World)
+	, m_Blocks(new BlockList)
+	, m_Buffer(new BlockList)
+	, m_BurningBlocks(new BlockList)
+{
+
+}
+
+cFireSimulator::~cFireSimulator()
+{
+	delete m_Buffer;
+	delete m_Blocks;
+	delete m_BurningBlocks;
+}
+
+void cFireSimulator::Simulate( float a_Dt )
+{
+	m_Buffer->clear();
+	std::swap( m_Blocks, m_Buffer );
+
+	for( BlockList::iterator itr = m_Buffer->begin(); itr != m_Buffer->end(); ++itr )
+	{
+		Vector3i Pos = *itr;
+
+		char BlockID = m_World->GetBlock(Pos.x, Pos.y, Pos.z);
+
+		if(!IsAllowedBlock(BlockID))	//Check wheather the block is still burning
+			continue;
+
+		if(BurnBlockAround(Pos.x, Pos.y, Pos.z))	//Burn single block and if there was one -> next time again
+			_AddBlock(Pos.x, Pos.y, Pos.z);
+		else
+			if(!IsForeverBurnable(m_World->GetBlock(Pos.x, Pos.y - 1, Pos.z)) && !FiresForever(BlockID))
+				m_World->SetBlock(Pos.x, Pos.y, Pos.z, E_BLOCK_AIR, 0);
+
+	}
+		
+}
+
+
+bool cFireSimulator::IsAllowedBlock( char a_BlockID )
+{
+	return a_BlockID == E_BLOCK_FIRE
+		|| IsBlockLava(a_BlockID);
+}
+
+void cFireSimulator::AddBlock(int a_X, int a_Y, int a_Z)
+{
+	char BlockID = m_World->GetBlock(a_X, a_Y, a_Z);
+	if(!IsAllowedBlock(BlockID))		//This should save very much time because it doesn´t have to iterate through all blocks
+		return;
+	
+	//check for duplicates
+	for( BlockList::iterator itr = m_Blocks->begin(); itr != m_Blocks->end(); ++itr )
+	{
+		Vector3i Pos = *itr;
+		if( Pos.x == a_X && Pos.y == a_Y && Pos.z == a_Z )
+			return;
+	}
+
+	_AddBlock(a_X, a_Y, a_Z);
+
+}
+
+void cFireSimulator::_AddBlock(int a_X, int a_Y, int a_Z)
+{
+	m_Blocks->push_back( Vector3i(a_X, a_Y, a_Z) );
+
+}
+
+bool cFireSimulator::IsForeverBurnable( char a_BlockID )
+{
+	return a_BlockID == E_BLOCK_BLOODSTONE;
+}
+
+bool cFireSimulator::IsBurnable( char a_BlockID )
+{
+	return a_BlockID == E_BLOCK_PLANKS
+		|| a_BlockID == E_BLOCK_LEAVES
+		|| a_BlockID == E_BLOCK_LOG
+		|| a_BlockID == E_BLOCK_WOOL
+		|| a_BlockID == E_BLOCK_BOOKCASE
+		|| a_BlockID == E_BLOCK_FENCE
+		|| a_BlockID == E_BLOCK_TNT
+		|| a_BlockID == E_BLOCK_VINES;
+}
+
+bool cFireSimulator::FiresForever( char a_BlockID )
+{
+	return a_BlockID != E_BLOCK_FIRE;
+}
+
+bool cFireSimulator::BurnBlockAround(int a_X, int a_Y, int a_Z)
+{
+	return BurnBlock(a_X + 1, a_Y, a_Z)
+		|| BurnBlock(a_X - 1, a_Y, a_Z)
+		|| BurnBlock(a_X, a_Y + 1, a_Z)
+		|| BurnBlock(a_X, a_Y - 1, a_Z)
+		|| BurnBlock(a_X, a_Y, a_Z + 1)
+		|| BurnBlock(a_X, a_Y, a_Z - 1);
+}
+
+bool cFireSimulator::BurnBlock(int a_X, int a_Y, int a_Z)
+{
+	char BlockID = m_World->GetBlock(a_X, a_Y, a_Z);
+	if(IsBurnable(BlockID))
+	{
+		m_World->SetBlock(a_X, a_Y, a_Z, E_BLOCK_FIRE, 0);
+		return true;
+	}
+	if(IsForeverBurnable(BlockID))
+	{
+		char BlockAbove = m_World->GetBlock(a_X, a_Y + 1, a_Z);
+		if(BlockAbove == E_BLOCK_AIR)
+		{
+			m_World->SetBlock(a_X, a_Y + 1, a_Z, E_BLOCK_FIRE, 0);	//Doesn´t notify the simulator so it won´t go off
+			return true;
+		}
+		return false;
+	}
+
+	return false;
+}
\ No newline at end of file