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
---
 .../TripwireHookHandler.h                          | 136 +++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 src/Simulator/IncrementalRedstoneSimulator/TripwireHookHandler.h

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

diff --git a/src/Simulator/IncrementalRedstoneSimulator/TripwireHookHandler.h b/src/Simulator/IncrementalRedstoneSimulator/TripwireHookHandler.h
new file mode 100644
index 000000000..d472d2dfb
--- /dev/null
+++ b/src/Simulator/IncrementalRedstoneSimulator/TripwireHookHandler.h
@@ -0,0 +1,136 @@
+
+#pragma once
+
+#include "RedstoneHandler.h"
+#include "Blocks/BlockTripwireHook.h"
+
+
+
+
+
+class cTripwireHookHandler : public cRedstoneHandler
+{
+	typedef cRedstoneHandler super;
+public:
+
+	cTripwireHookHandler(cWorld & a_World) :
+		super(a_World)
+	{
+	}
+
+	virtual unsigned char GetPowerDeliveredToPosition(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, const Vector3i & a_QueryPosition, BLOCKTYPE a_QueryBlockType) override
+	{
+		UNUSED(a_QueryBlockType);
+		UNUSED(a_QueryPosition);
+
+		return (GetPowerLevel(a_Position, a_BlockType, a_Meta) == 15) ? 15 : 0;
+	}
+
+	virtual unsigned char GetPowerLevel(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta) override
+	{
+		UNUSED(a_BlockType);
+
+		bool FoundActivated = false;
+		auto Position = a_Position;
+		eBlockFace FaceToGoTowards = cBlockTripwireHookHandler::MetadataToDirection(a_Meta);
+
+		for (int i = 0; i < 40; ++i)  // Tripwires can be connected up to 40 blocks
+		{
+			BLOCKTYPE Type;
+			NIBBLETYPE Meta;
+
+			AddFaceDirection(Position.x, Position.y, Position.z, FaceToGoTowards);
+			m_World.GetBlockTypeMeta(Position.x, Position.y, Position.z, Type, Meta);
+
+			if (Type == E_BLOCK_TRIPWIRE)
+			{
+				class cTripwireCallback :
+					public cEntityCallback
+				{
+				public:
+					cTripwireCallback(void) :
+						m_NumberOfEntities(0),
+						m_FoundPlayer(false)
+					{
+					}
+
+					virtual bool Item(cEntity * a_Entity) override
+					{
+						return true;
+					}
+
+					unsigned int m_NumberOfEntities;
+					bool m_FoundPlayer;
+				} TripwireCallback;
+
+				if (!m_World.ForEachEntityInBox(cBoundingBox(Vector3d(0.5, 0, 0.5) + Position, 0.5, 0.5), TripwireCallback))
+				{
+					FoundActivated = true;
+				}
+			}
+			else if (Type == E_BLOCK_TRIPWIRE_HOOK)
+			{
+				if (ReverseBlockFace(cBlockTripwireHookHandler::MetadataToDirection(Meta)) == FaceToGoTowards)
+				{
+					// Other hook facing in opposite direction - circuit completed!
+					return FoundActivated ? 15 : 1;
+				}
+				else
+				{
+					// Tripwire hook not connected at all
+					return 0;
+				}
+			}
+			else
+			{
+				// Tripwire hook not connected at all
+				return 0;
+			}
+		}
+
+		return 0;
+	}
+
+	virtual cVector3iArray Update(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, PoweringData a_PoweringData) override
+	{
+		// LOGD("Evaluating hooky the tripwire hook (%d %d %d)", a_Position.x, a_Position.y, a_Position.z);
+
+		auto Power = GetPowerLevel(a_Position, a_BlockType, a_Meta);
+		NIBBLETYPE Meta;
+		if (Power == 0)
+		{
+			Meta = (a_Meta & 0x3);
+		}
+		else if (Power == 1)
+		{
+			// Connected but not activated, AND away the highest bit
+			Meta = (a_Meta & 0x7) | 0x4;
+		}
+		else if (Power == 15)
+		{
+			// Connected and activated, set the 3rd and 4th highest bits
+			Meta = (a_Meta | 0xC);
+		}
+		else
+		{
+			ASSERT(!"Unexpected tripwire hook power level!");
+			return {};
+		}
+
+		if (Meta != a_Meta)
+		{
+			m_World.SetBlockMeta(a_Position, Meta);
+			return GetAdjustedRelatives(a_Position, GetRelativeAdjacents());
+		}
+		
+		return {};
+	}
+
+	virtual cVector3iArray GetValidSourcePositions(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta) override
+	{
+		UNUSED(a_BlockType);
+		UNUSED(a_Meta);
+		UNUSED(a_Position);
+		return {};
+	}
+};
-- 
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