1 files changed, 701 insertions, 0 deletions

diff --git a/source/RedstoneSimulator.cpp b/source/RedstoneSimulator.cpp
new file mode 100644
index 000000000..3d5fd51f0
--- /dev/null
+++ b/source/RedstoneSimulator.cpp
@@ -0,0 +1,701 @@
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "RedstoneSimulator.h"
+#include "Piston.h"
+#include "World.h"
+#include "BlockID.h"
+#include "Torch.h"
+
+#include "Redstone.h"
+
+
+
+cRedstoneSimulator::cRedstoneSimulator( cWorld* a_World )
+	: super(a_World)
+{
+}
+
+
+
+
+
+cRedstoneSimulator::~cRedstoneSimulator()
+{
+}
+
+
+
+
+
+void cRedstoneSimulator::WakeUp( int a_X, int a_Y, int a_Z )
+{
+	if( cRedstone::s_UseRedstone ) return; // Using the other/broken simulator
+
+	cCSLock Lock( m_CS );
+	m_Blocks.push_back( Vector3i( a_X, a_Y, a_Z ) );
+}
+
+
+
+
+
+void cRedstoneSimulator::Simulate( float a_Dt )
+{
+	if( cRedstone::s_UseRedstone ) return; // Using the other/broken simulator
+
+	// Toggle torches on/off
+	while( !m_RefreshTorchesAround.empty() )
+	{
+		Vector3i pos = m_RefreshTorchesAround.front();
+		m_RefreshTorchesAround.pop_front();
+
+		RefreshTorchesAround( pos );
+	}
+
+	// Set repeaters to correct values, and decrement ticks
+	for( RepeaterList::iterator itr = m_SetRepeaters.begin(); itr != m_SetRepeaters.end(); )
+	{
+		(*itr).Ticks--;
+		if( (*itr).Ticks <= 0 )
+		{
+			char Block = m_World->GetBlock( (*itr).Position );
+			if( (*itr).bPowerOn == true && Block == E_BLOCK_REDSTONE_REPEATER_OFF )
+			{
+				m_World->FastSetBlock( (*itr).Position.x, (*itr).Position.y, (*itr).Position.z, E_BLOCK_REDSTONE_REPEATER_ON, m_World->GetBlockMeta( (*itr).Position ) );
+				m_Blocks.push_back( (*itr).Position );
+			}
+			else if( (*itr).bPowerOn == false && Block == E_BLOCK_REDSTONE_REPEATER_ON )
+			{
+				m_World->FastSetBlock( (*itr).Position.x, (*itr).Position.y, (*itr).Position.z, E_BLOCK_REDSTONE_REPEATER_OFF, m_World->GetBlockMeta( (*itr).Position ) );
+				m_Blocks.push_back( (*itr).Position );
+			}
+
+			if( (*itr).bPowerOffNextTime )
+			{
+				(*itr).bPowerOn = false;
+				(*itr).bPowerOffNextTime = false;
+				(*itr).Ticks = 10; // TODO: Look up actual ticks from block metadata
+				++itr;
+			}
+			else
+			{
+				itr = m_SetRepeaters.erase( itr );
+			}
+		}
+		else
+		{
+			++itr;
+		}
+	}
+
+	// Handle changed blocks
+	{
+		cCSLock Lock( m_CS );
+		std::swap( m_Blocks, m_BlocksBuffer );
+	}
+	for( BlockList::iterator itr = m_BlocksBuffer.begin(); itr != m_BlocksBuffer.end(); ++itr )
+	{
+		HandleChange( *itr );
+	}
+	m_BlocksBuffer.clear();
+}
+
+
+
+
+
+void cRedstoneSimulator::RefreshTorchesAround( const Vector3i & a_BlockPos )
+{
+	static Vector3i Surroundings [] = {
+		Vector3i(-1, 0, 0),
+		Vector3i( 1, 0, 0),
+		Vector3i( 0, 0,-1),
+		Vector3i( 0, 0, 1),
+		Vector3i( 0, 1, 0), // Also toggle torch on top
+	};
+	char TargetBlockID = E_BLOCK_REDSTONE_TORCH_ON;
+	char TargetRepeaterID = E_BLOCK_REDSTONE_REPEATER_OFF;
+	if( IsPowered( a_BlockPos, true ) )
+	{
+		TargetBlockID = E_BLOCK_REDSTONE_TORCH_OFF;
+		TargetRepeaterID = E_BLOCK_REDSTONE_REPEATER_ON;
+		//if( m_World->GetBlock( a_BlockPos ) == E_BLOCK_DIRT )
+		//{
+		//	m_World->FastSetBlock( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z, E_BLOCK_STONE, 0 );
+		//}
+	}
+	else
+	{
+		//if( m_World->GetBlock( a_BlockPos ) == E_BLOCK_STONE )
+		//{
+		//	m_World->FastSetBlock( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z, E_BLOCK_DIRT, 0 );
+		//}
+	}
+
+	for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+	{
+		Vector3i TorchPos = a_BlockPos + Surroundings[i];
+		const char Block = m_World->GetBlock( TorchPos );
+		switch( Block )
+		{
+		case E_BLOCK_REDSTONE_TORCH_ON:
+		case E_BLOCK_REDSTONE_TORCH_OFF:
+			if( Block != TargetBlockID )
+			{
+				char TorchMeta = m_World->GetBlockMeta( TorchPos );
+				if( cTorch::IsAttachedTo( TorchPos, TorchMeta, a_BlockPos ) )
+				{
+					m_World->FastSetBlock( TorchPos.x, TorchPos.y, TorchPos.z, TargetBlockID, m_World->GetBlockMeta( TorchPos ) );
+					m_Blocks.push_back( TorchPos );
+				}
+			}
+			break;
+		case E_BLOCK_REDSTONE_REPEATER_ON:
+		case E_BLOCK_REDSTONE_REPEATER_OFF:
+			if( Block != TargetRepeaterID && cRedstone::IsRepeaterPointingAway( TorchPos, m_World->GetBlockMeta( TorchPos ), a_BlockPos ) )
+			{
+				SetRepeater( TorchPos, 10, TargetRepeaterID == E_BLOCK_REDSTONE_REPEATER_ON );
+			}
+			break;
+		default:
+			break;
+		};
+	}
+}
+
+
+
+
+
+void cRedstoneSimulator::HandleChange( const Vector3i & a_BlockPos )
+{
+	std::deque< Vector3i > SpreadStack;
+
+	Vector3i Surroundings[] = {
+		Vector3i( 1, 0, 0 ),
+		Vector3i( 1, 1, 0 ),
+		Vector3i( 1,-1, 0 ),
+		Vector3i(-1, 0, 0 ),
+		Vector3i(-1, 1, 0 ),
+		Vector3i(-1,-1, 0 ),
+		Vector3i( 0, 0, 1 ),
+		Vector3i( 0, 1, 1 ),
+		Vector3i( 0,-1, 1 ),
+		Vector3i( 0, 0,-1 ),
+		Vector3i( 0, 1,-1 ),
+		Vector3i( 0,-1,-1 ),
+		Vector3i( 0,-1, 0 ),
+	};
+
+	char Block = m_World->GetBlock( a_BlockPos );
+
+	// First check whether torch should be on or off
+	if( Block == E_BLOCK_REDSTONE_TORCH_ON || Block == E_BLOCK_REDSTONE_TORCH_OFF )
+	{
+		static Vector3i Surroundings [] = {
+			Vector3i(-1, 0, 0),
+			Vector3i( 1, 0, 0),
+			Vector3i( 0, 0,-1),
+			Vector3i( 0, 0, 1),
+			Vector3i( 0,-1, 0),
+		};
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i pos = a_BlockPos + Surroundings[i];
+			char OtherBlock = m_World->GetBlock( pos );
+			if( (OtherBlock != E_BLOCK_AIR) && (OtherBlock != E_BLOCK_REDSTONE_TORCH_ON) && (OtherBlock != E_BLOCK_REDSTONE_TORCH_OFF) )
+			{
+				RefreshTorchesAround( pos );
+			}
+		}
+		Block = m_World->GetBlock( a_BlockPos ); // Make sure we got the updated block
+	}
+	else if( Block == E_BLOCK_REDSTONE_REPEATER_ON || Block == E_BLOCK_REDSTONE_REPEATER_OFF ) // Check if repeater is powered by a 'powered block' (not wires/torch)
+	{
+		Vector3i Direction = cRedstone::GetRepeaterDirection( m_World->GetBlockMeta( a_BlockPos ) );
+		Vector3i pos = a_BlockPos - Direction; // NOTE: It's minus Direction
+		char OtherBlock = m_World->GetBlock( pos );
+		if( (OtherBlock != E_BLOCK_AIR) && (OtherBlock != E_BLOCK_REDSTONE_TORCH_ON) && (OtherBlock != E_BLOCK_REDSTONE_TORCH_OFF) && (OtherBlock != E_BLOCK_REDSTONE_WIRE) )
+		{
+			RefreshTorchesAround( pos );
+		}
+		else
+		{
+			SetRepeater( a_BlockPos, 10, IsPowered( a_BlockPos, false ) );
+		}
+		Block = m_World->GetBlock( a_BlockPos );
+	}
+
+	BlockList Sources;
+	// If torch is still on, use it as a source
+	if( Block == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		Sources.push_back( a_BlockPos );
+	}
+	else if( Block == E_BLOCK_REDSTONE_REPEATER_ON )
+	{
+		static Vector3i Surroundings [] = { // It only spreads right in front, and one block up
+			Vector3i( 0, 0, 0),
+			Vector3i( 0, 1, 0),
+		};
+		Vector3i Direction = cRedstone::GetRepeaterDirection( m_World->GetBlockMeta( a_BlockPos ) );
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i pos = a_BlockPos + Direction + Surroundings[i];
+			if( PowerBlock( pos, a_BlockPos, 0xf ) )
+			{
+				SpreadStack.push_back( pos );
+			}
+		}
+	}
+
+	// Power all blocks legally connected to the sources
+	if( Block != E_BLOCK_REDSTONE_REPEATER_ON )
+	{
+		BlockList NewSources = RemoveCurrent( a_BlockPos );
+		Sources.insert( Sources.end(), NewSources.begin(), NewSources.end() );
+		while( !Sources.empty() )
+		{
+			Vector3i SourcePos = Sources.back();
+			Sources.pop_back();
+
+			char Block = m_World->GetBlock( SourcePos );
+			switch( Block )
+			{
+			case E_BLOCK_REDSTONE_TORCH_OFF:
+			case E_BLOCK_REDSTONE_TORCH_ON:
+				{
+					static Vector3i Surroundings [] = {
+						Vector3i(-1, 0, 0),
+						Vector3i( 1, 0, 0),
+						Vector3i( 0, 0,-1),
+						Vector3i( 0, 0, 1),
+					};
+					for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+					{
+						Vector3i OtherPos =  SourcePos + Surroundings[i];
+						if( PowerBlock( OtherPos, a_BlockPos, 0xf ) )
+						{
+							SpreadStack.push_back( OtherPos ); // Changed, so add to stack
+						}
+					}
+				}
+				break;
+			case E_BLOCK_REDSTONE_REPEATER_OFF:
+			case E_BLOCK_REDSTONE_REPEATER_ON:
+				{
+					static Vector3i Surroundings [] = {
+						Vector3i( 0, 0, 0),
+						Vector3i( 0, 1, 0),
+					};
+					Vector3i Direction = cRedstone::GetRepeaterDirection( m_World->GetBlockMeta( SourcePos ) );
+					for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+					{
+						Vector3i pos = SourcePos + Direction + Surroundings[i];
+						if( PowerBlock( pos, a_BlockPos, 0xf ) )
+						{
+							SpreadStack.push_back( pos );
+						}
+					}
+				}
+				break;
+			};
+
+			
+		}
+	}
+
+
+	// Do a floodfill
+	while( !SpreadStack.empty() )
+	{
+		Vector3i pos = SpreadStack.back();
+		SpreadStack.pop_back();
+
+		char Meta = m_World->GetBlockMeta( pos );
+
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i OtherPos =  pos + Surroundings[i];
+			if( PowerBlock( OtherPos, pos, Meta-1 ) )
+			{
+				SpreadStack.push_back( OtherPos ); // Changed, so add to stack
+			}
+		}
+	}
+
+	// Only after a redstone area has been completely simulated the redstone entities can react
+	while( !m_RefreshPistons.empty() )
+	{
+		Vector3i pos = m_RefreshPistons.back();
+		m_RefreshPistons.pop_back();
+
+		char Block = m_World->GetBlock( pos );
+		switch( Block )
+		{
+		case E_BLOCK_PISTON:
+		case E_BLOCK_STICKY_PISTON:
+			if( IsPowered( pos ) )
+			{
+				cPiston Piston( m_World );
+				Piston.ExtendPiston( pos.x, pos.y, pos.z );
+			}
+			else
+			{
+				cPiston Piston( m_World );
+				Piston.RetractPiston( pos.x, pos.y, pos.z );
+			}
+			break;
+		default:
+			break;
+		};
+	}
+}
+
+
+
+
+
+bool cRedstoneSimulator::PowerBlock( const Vector3i & a_BlockPos, const Vector3i & a_FromBlock, char a_Power )
+{
+	char Block = m_World->GetBlock( a_BlockPos );
+	switch( Block )
+	{
+	case E_BLOCK_REDSTONE_WIRE:
+		{
+			if( m_World->GetBlockMeta( a_BlockPos ) < a_Power )
+			{
+				m_World->SetBlockMeta( a_BlockPos, a_Power );
+				return true;
+			}
+		}
+		break;
+	case E_BLOCK_PISTON:
+	case E_BLOCK_STICKY_PISTON:
+		{
+			m_RefreshPistons.push_back( a_BlockPos );
+		}
+		break;
+	case E_BLOCK_REDSTONE_REPEATER_OFF:
+	case E_BLOCK_REDSTONE_REPEATER_ON:
+		{
+			if( cRedstone::IsRepeaterPointingAway( a_BlockPos, m_World->GetBlockMeta( a_BlockPos ), a_FromBlock ) )
+			{
+				SetRepeater( a_BlockPos, 10, true );
+			}
+		}
+		break;
+	default:
+		{
+			if( Block != E_BLOCK_AIR && Block != E_BLOCK_REDSTONE_TORCH_ON && Block != E_BLOCK_REDSTONE_TORCH_OFF )
+			{
+				if( IsPowered( a_BlockPos, true ) )
+				{
+					m_RefreshTorchesAround.push_back( a_BlockPos );
+				}
+			}
+		}
+		break;
+	};
+
+	return false;
+}
+
+
+
+
+
+int cRedstoneSimulator::UnPowerBlock( const Vector3i & a_BlockPos, const Vector3i & a_FromBlock )
+{
+	char Block = m_World->GetBlock( a_BlockPos );
+	switch( Block )
+	{
+	case E_BLOCK_REDSTONE_WIRE:
+		{
+			if( m_World->GetBlockMeta( a_BlockPos ) > 0 )
+			{
+				m_World->SetBlockMeta( a_BlockPos, 0 );
+				return 1;
+			}
+		}
+		break;
+	case E_BLOCK_PISTON:
+	case E_BLOCK_STICKY_PISTON:
+		{
+			m_RefreshPistons.push_back( a_BlockPos );
+		}
+		break;
+	case E_BLOCK_REDSTONE_TORCH_ON:
+		{
+			return 2;
+		}
+		break;
+	case E_BLOCK_REDSTONE_REPEATER_ON:
+		{
+			if( cRedstone::IsRepeaterPointingTo( a_BlockPos, m_World->GetBlockMeta( a_BlockPos ), a_FromBlock )
+				|| cRedstone::IsRepeaterPointingTo( a_BlockPos, m_World->GetBlockMeta( a_BlockPos ), a_FromBlock - Vector3i(0, 1, 0) ) ) // Check if repeater is next/below wire
+			{
+				return 2;
+			}
+			else if( cRedstone::IsRepeaterPointingAway( a_BlockPos, m_World->GetBlockMeta( a_BlockPos ), a_FromBlock ) )
+			{
+				SetRepeater( a_BlockPos, 10, false );
+			}
+		}
+	case E_BLOCK_REDSTONE_REPEATER_OFF:
+		if( cRedstone::IsRepeaterPointingAway( a_BlockPos, m_World->GetBlockMeta( a_BlockPos ), a_FromBlock ) )
+		{
+			SetRepeater( a_BlockPos, 10, false );
+		}
+		break;
+	default:
+		if( Block != E_BLOCK_AIR && Block != E_BLOCK_REDSTONE_TORCH_ON && Block != E_BLOCK_REDSTONE_TORCH_OFF )
+		{
+			if( !IsPowered( a_BlockPos, true ) )
+			{
+				m_RefreshTorchesAround.push_back( a_BlockPos );
+			}
+		}
+		break;
+	};
+
+	return 0;
+}
+
+
+
+
+
+// Removes current from all powered redstone wires until it reaches an energy source.
+// Also returns all energy sources it encountered
+cRedstoneSimulator::BlockList cRedstoneSimulator::RemoveCurrent( const Vector3i & a_BlockPos )
+{
+
+
+	std::deque< Vector3i > SpreadStack;
+	std::deque< Vector3i > FoundSources;
+
+	Vector3i Surroundings[] = {
+		Vector3i( 1, 0, 0 ),
+		Vector3i( 1, 1, 0 ),
+		Vector3i( 1,-1, 0 ),
+		Vector3i(-1, 0, 0 ),
+		Vector3i(-1, 1, 0 ),
+		Vector3i(-1,-1, 0 ),
+		Vector3i( 0, 0, 1 ),
+		Vector3i( 0, 1, 1 ),
+		Vector3i( 0,-1, 1 ),
+		Vector3i( 0, 0,-1 ),
+		Vector3i( 0, 1,-1 ),
+		Vector3i( 0,-1,-1 ),
+		Vector3i( 0,-1, 0 ),
+	};
+
+	char Block = m_World->GetBlock( a_BlockPos );
+	if( Block == E_BLOCK_REDSTONE_REPEATER_ON || Block == E_BLOCK_REDSTONE_REPEATER_OFF )
+	{
+		static Vector3i Surroundings [] = { // Repeaters only spread right in front and 1 block up
+			Vector3i( 0, 0, 0),
+			Vector3i( 0, 1, 0),
+		};
+		Vector3i Direction = cRedstone::GetRepeaterDirection( m_World->GetBlockMeta( a_BlockPos ) );
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i pos = a_BlockPos + Direction + Surroundings[i];
+			int RetVal = UnPowerBlock( pos, a_BlockPos );
+			if( RetVal == 1 )
+			{
+				SpreadStack.push_back( pos ); // Changed, so add to stack
+			}
+			else if( RetVal == 2 )
+			{
+				FoundSources.push_back( pos );
+			}
+		}
+	}
+	else if( Block == E_BLOCK_REDSTONE_TORCH_OFF || Block == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		static Vector3i Surroundings [] = {	// Torches only spread on the same level
+			Vector3i(-1, 0, 0),
+			Vector3i( 1, 0, 0),
+			Vector3i( 0, 0,-1),
+			Vector3i( 0, 0, 1),
+		};
+
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i pos = Vector3i( a_BlockPos ) + Surroundings[i];
+			int RetVal = UnPowerBlock( pos, a_BlockPos );
+			if( RetVal == 1 )
+			{
+				SpreadStack.push_back( pos ); // Changed, so add to stack
+			}
+			else if( RetVal == 2 )
+			{
+				FoundSources.push_back( pos );
+			}
+		}
+	}
+	else
+	{
+		SpreadStack.push_back( a_BlockPos );
+	}
+
+
+	while( !SpreadStack.empty() )
+	{
+		Vector3i pos = SpreadStack.back();
+		SpreadStack.pop_back();
+
+		for( unsigned int i = 0; i < ARRAYCOUNT( Surroundings ); ++i )
+		{
+			Vector3i OtherPos =  pos + Surroundings[i];
+			int RetVal = UnPowerBlock( OtherPos, pos );
+			if( RetVal == 1 )
+			{
+				SpreadStack.push_back( OtherPos ); // Changed, so add to stack
+			}
+			else if( RetVal == 2 )
+			{
+				FoundSources.push_back( OtherPos );
+			}
+		}
+	}
+
+	return FoundSources;
+}
+
+
+
+
+
+bool cRedstoneSimulator::IsPowering( const Vector3i & a_PowerPos, const Vector3i & a_BlockPos, eRedstoneDirection a_WireDirection, bool a_bOnlyByWire )
+{
+	char PowerBlock = m_World->GetBlock( a_PowerPos );
+	if( !a_bOnlyByWire && PowerBlock == E_BLOCK_REDSTONE_TORCH_ON )	return true;
+	if( PowerBlock == E_BLOCK_REDSTONE_REPEATER_ON ) // A repeater pointing towards block is regarded as wire
+	{
+		if( cRedstone::IsRepeaterPointingTo( a_PowerPos, m_World->GetBlockMeta( a_PowerPos ), a_BlockPos ) )
+		{
+			return true;
+		}
+	}
+	if( PowerBlock == E_BLOCK_REDSTONE_WIRE )
+	{
+		if( m_World->GetBlockMeta( a_PowerPos ) > 0 )
+		{
+			if( GetDirection( a_PowerPos ) == a_WireDirection )
+			{
+				return true;
+			}
+		}
+	}
+
+	return false;
+}
+
+
+
+
+
+bool cRedstoneSimulator::IsPowered( const Vector3i & a_BlockPos, bool a_bOnlyByWire /* = false */ )
+{
+	char Block = m_World->GetBlock( a_BlockPos );
+	if( Block == E_BLOCK_REDSTONE_REPEATER_OFF || Block == E_BLOCK_REDSTONE_REPEATER_ON )
+	{
+		Vector3i Behind = a_BlockPos - cRedstone::GetRepeaterDirection( m_World->GetBlockMeta( a_BlockPos ) );
+		char BehindBlock = m_World->GetBlock( Behind );
+		if( BehindBlock == E_BLOCK_REDSTONE_TORCH_ON )
+		{
+			return true;
+		}
+		if( BehindBlock == E_BLOCK_REDSTONE_WIRE )
+		{
+			if( m_World->GetBlockMeta( Behind ) > 0 )
+			{
+				return true;
+			}
+		}
+		if( BehindBlock == E_BLOCK_REDSTONE_REPEATER_ON )
+		{
+			if( cRedstone::IsRepeaterPointingTo( Behind, m_World->GetBlockMeta( Behind ), a_BlockPos ) )
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+	if( IsPowering( Vector3i( a_BlockPos.x-1, a_BlockPos.y, a_BlockPos.z ), a_BlockPos, REDSTONE_X_POS, a_bOnlyByWire ) )
+		return true;
+	if( IsPowering( Vector3i( a_BlockPos.x+1, a_BlockPos.y, a_BlockPos.z ), a_BlockPos, REDSTONE_X_NEG, a_bOnlyByWire ) )
+		return true;
+	if( IsPowering( Vector3i( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z-1 ), a_BlockPos, REDSTONE_Z_POS, a_bOnlyByWire ) )
+		return true;
+	if( IsPowering( Vector3i( a_BlockPos.x, a_BlockPos.y, a_BlockPos.z+1 ), a_BlockPos, REDSTONE_Z_NEG, a_bOnlyByWire ) )
+		return true;
+
+	// Only wires can power the bottom block
+	char PosY = m_World->GetBlock( a_BlockPos.x, a_BlockPos.y+1, a_BlockPos.z );
+	if( PosY == E_BLOCK_REDSTONE_WIRE )
+	{
+		if( m_World->GetBlockMeta( a_BlockPos.x, a_BlockPos.y+1, a_BlockPos.z ) > 0 )
+		{
+			return true;
+		}
+	}
+
+	return false;
+}
+
+
+
+
+// Believe me, it works!! TODO: Add repeaters and low/high wires
+cRedstoneSimulator::eRedstoneDirection cRedstoneSimulator::GetDirection( int a_X, int a_Y, int a_Z )
+{
+	int Dir = REDSTONE_NONE;
+
+	char NegX = m_World->GetBlock( a_X-1, a_Y, a_Z );
+	if( NegX == E_BLOCK_REDSTONE_WIRE || NegX == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		Dir |= (REDSTONE_X_POS);
+	}
+	char PosX = m_World->GetBlock( a_X+1, a_Y, a_Z );
+	if( PosX == E_BLOCK_REDSTONE_WIRE || PosX == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		Dir |= (REDSTONE_X_NEG);
+	}
+	char NegZ = m_World->GetBlock( a_X, a_Y, a_Z-1 );
+	if( NegZ == E_BLOCK_REDSTONE_WIRE || NegZ == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		if( (Dir & REDSTONE_X_POS) && !(Dir & REDSTONE_X_NEG ) ) //corner
+		{
+			Dir ^= REDSTONE_X_POS;
+			Dir |= REDSTONE_X_NEG;
+		}
+		if( (Dir & REDSTONE_X_NEG) && !(Dir & REDSTONE_X_POS ) ) //corner
+		{
+			Dir ^= REDSTONE_X_NEG;
+			Dir |= REDSTONE_X_POS;
+		}
+		Dir |= REDSTONE_Z_POS;
+	}
+	char PosZ = m_World->GetBlock( a_X, a_Y, a_Z+1 );
+	if( PosZ == E_BLOCK_REDSTONE_WIRE || PosZ == E_BLOCK_REDSTONE_TORCH_ON )
+	{
+		if( (Dir & REDSTONE_X_POS) && !(Dir & REDSTONE_X_NEG ) ) //corner
+		{
+			Dir ^= REDSTONE_X_POS;
+			Dir |= REDSTONE_X_NEG;
+		}
+		if( (Dir & REDSTONE_X_NEG) && !(Dir & REDSTONE_X_POS ) ) //corner
+		{
+			Dir ^= REDSTONE_X_NEG;
+			Dir |= REDSTONE_X_POS;
+		}
+		Dir |= REDSTONE_Z_NEG;
+	}
+
+	return (eRedstoneDirection)Dir;
+}
\ No newline at end of file