From 5b62c4c3145c08b093521e42c565922fa85de4ad Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@hotmail.co.uk>
Date: Fri, 26 Jun 2015 17:24:51 -0500
Subject: Reorganised the redstone simulator

-> Many thanks to @worktycho for the idea, and @Haxi52 for the implementation plan!
* Uses classes and inheritance now
* Speed should be improved
---
 .../RedstoneWireHandler.h                          | 134 +++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h

(limited to 'src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h')

diff --git a/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h b/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h
new file mode 100644
index 000000000..fbf6eb646
--- /dev/null
+++ b/src/Simulator/IncrementalRedstoneSimulator/RedstoneWireHandler.h
@@ -0,0 +1,134 @@
+
+#pragma once
+
+#include "RedstoneHandler.h"
+
+
+
+
+
+class cRedstoneWireHandler : public cRedstoneHandler
+{
+	typedef cRedstoneHandler super;
+public:
+
+	cRedstoneWireHandler(cWorld & a_World) :
+		super(a_World)
+	{
+	}
+
+	inline static bool IsDirectlyConnectingMechanism(BLOCKTYPE a_Block)
+	{
+		switch (a_Block)
+		{
+			case E_BLOCK_REDSTONE_REPEATER_ON:
+			case E_BLOCK_REDSTONE_REPEATER_OFF:
+			case E_BLOCK_ACTIVE_COMPARATOR:
+			case E_BLOCK_INACTIVE_COMPARATOR:
+			case E_BLOCK_REDSTONE_TORCH_OFF:
+			case E_BLOCK_REDSTONE_TORCH_ON:
+			case E_BLOCK_REDSTONE_WIRE: return true;
+			default: return false;
+		}
+	}
+
+	const cVector3iArray GetTerracingConnectionOffsets(const Vector3i & a_Position)
+	{
+		cVector3iArray RelativePositions;
+		bool IsYPTerracingBlocked = cBlockInfo::IsSolid(m_World.GetBlock(a_Position + OffsetYP()));
+
+		for (const auto Adjacent : GetRelativeLaterals())
+		{
+			if (
+				!IsYPTerracingBlocked &&
+				(m_World.GetBlock(a_Position + Adjacent + OffsetYP()) == E_BLOCK_REDSTONE_WIRE)
+				)
+			{
+				RelativePositions.emplace_back(Adjacent + OffsetYP());
+			}
+
+			if (
+				!cBlockInfo::IsSolid(m_World.GetBlock(a_Position + Adjacent)) &&  // IsYMTerracingBlocked (i.e. check block above lower terracing position, a.k.a. just the plain adjacent)
+				(m_World.GetBlock(a_Position + Adjacent + OffsetYM()) == E_BLOCK_REDSTONE_WIRE)
+			)
+			{
+				RelativePositions.emplace_back(Adjacent + OffsetYM());
+			}
+		}
+
+		return RelativePositions;
+	}
+
+	virtual unsigned char GetPowerDeliveredToPosition(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, const Vector3i & a_QueryPosition, BLOCKTYPE a_QueryBlockType) override
+	{
+		if (a_QueryPosition == (a_Position + OffsetYP()))
+		{
+			// Wires do not power things above them
+			return 0;
+		}
+
+		if (a_QueryBlockType != E_BLOCK_REDSTONE_WIRE)
+		{
+			// For mechanisms, wire of power one will still power them
+			a_Meta++;
+		}
+
+		if ((a_QueryPosition != (a_Position + OffsetYM())) && !IsDirectlyConnectingMechanism(a_QueryBlockType))
+		{
+			Vector3i PotentialOffset;
+			bool FoundOneBorderingMechanism = false;
+
+			for (const auto & Offset : StaticAppend(GetRelativeLaterals(), GetTerracingConnectionOffsets(a_Position)))
+			{
+				if (IsDirectlyConnectingMechanism(m_World.GetBlock(Offset + a_Position)))
+				{
+					if (FoundOneBorderingMechanism)
+					{
+						return 0;
+					}
+					else
+					{
+						FoundOneBorderingMechanism = true;
+						PotentialOffset = { -Offset.x, 0, -Offset.z };
+					}
+				}
+			}
+
+			if (FoundOneBorderingMechanism && (a_QueryPosition != (a_Position + PotentialOffset)))
+			{
+				return 0;
+			}
+		}
+
+		return (a_Meta != 0) ? --a_Meta : a_Meta;
+	}
+
+	virtual unsigned char GetPowerLevel(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta) override
+	{
+		UNUSED(a_Position);
+		UNUSED(a_BlockType);
+		return a_Meta;
+	}
+
+	virtual cVector3iArray Update(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, PoweringData a_PoweringData) override
+	{
+		UNUSED(a_BlockType);
+		LOGD("Evaluating dusty the wire (%d %d %d) %i", a_Position.x, a_Position.y, a_Position.z, a_PoweringData.PowerLevel);
+
+		if (a_Meta != a_PoweringData.PowerLevel)
+		{
+			m_World.SetBlockMeta(a_Position, a_PoweringData.PowerLevel);
+			return GetAdjustedRelatives(a_Position, StaticAppend(StaticAppend(GetRelativeLaterals(), GetTerracingConnectionOffsets(a_Position)), cVector3iArray{ OffsetYM() }));
+		}
+
+		return {};
+	}
+
+	virtual cVector3iArray GetValidSourcePositions(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta) override
+	{
+		UNUSED(a_BlockType);
+		UNUSED(a_Meta);
+
+		return GetAdjustedRelatives(a_Position, StaticAppend(GetRelativeAdjacents(), GetTerracingConnectionOffsets(a_Position)));
+	}
+};
-- 
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