6 files changed, 174 insertions, 2 deletions

diff --git a/source/BlockID.cpp b/source/BlockID.cpp
index c3bd3c750..ecdbc0c34 100644
--- a/source/BlockID.cpp
+++ b/source/BlockID.cpp
@@ -630,11 +630,13 @@ public:
 		// TODO: Any other transparent blocks?
 
 		// One hit break blocks
+		g_BlockOneHitDig[E_BLOCK_ACTIVE_COMPARATOR]     = true;
 		g_BlockOneHitDig[E_BLOCK_BROWN_MUSHROOM]        = true;
 		g_BlockOneHitDig[E_BLOCK_CARROTS]               = true;
 		g_BlockOneHitDig[E_BLOCK_CROPS]                 = true;
 		g_BlockOneHitDig[E_BLOCK_FIRE]                  = true;
 		g_BlockOneHitDig[E_BLOCK_FLOWER_POT]            = true;
+		g_BlockOneHitDig[E_BLOCK_INACTIVE_COMPARATOR]   = true;
 		g_BlockOneHitDig[E_BLOCK_LOCKED_CHEST]          = true;
 		g_BlockOneHitDig[E_BLOCK_MELON_STEM]            = true;
 		g_BlockOneHitDig[E_BLOCK_POTATOES]              = true;
@@ -655,6 +657,7 @@ public:
 		g_BlockOneHitDig[E_BLOCK_YELLOW_FLOWER]         = true;
 
 		// Blocks that breaks when pushed by piston
+		g_BlockPistonBreakable[E_BLOCK_ACTIVE_COMPARATOR]     = true;
 		g_BlockPistonBreakable[E_BLOCK_AIR]                   = true;
 		g_BlockPistonBreakable[E_BLOCK_BED]                   = true;
 		g_BlockPistonBreakable[E_BLOCK_BROWN_MUSHROOM]        = true;
@@ -662,6 +665,7 @@ public:
 		g_BlockPistonBreakable[E_BLOCK_CROPS]                 = true;
 		g_BlockPistonBreakable[E_BLOCK_DEAD_BUSH]             = true;
 		g_BlockPistonBreakable[E_BLOCK_FIRE]                  = true;
+		g_BlockPistonBreakable[E_BLOCK_INACTIVE_COMPARATOR]   = true;
 		g_BlockPistonBreakable[E_BLOCK_IRON_DOOR]             = true;
 		g_BlockPistonBreakable[E_BLOCK_JACK_O_LANTERN]        = true;
 		g_BlockPistonBreakable[E_BLOCK_LADDER]                = true;
@@ -694,6 +698,7 @@ public:
 
 
 		// Blocks that can be snowed over:
+		g_BlockIsSnowable[E_BLOCK_ACTIVE_COMPARATOR]     = false;
 		g_BlockIsSnowable[E_BLOCK_AIR]                   = false;
 		g_BlockIsSnowable[E_BLOCK_BROWN_MUSHROOM]        = false;
 		g_BlockIsSnowable[E_BLOCK_CACTUS]                = false;
@@ -702,6 +707,7 @@ public:
 		g_BlockIsSnowable[E_BLOCK_FIRE]                  = false;
 		g_BlockIsSnowable[E_BLOCK_GLASS]                 = false;
 		g_BlockIsSnowable[E_BLOCK_ICE]                   = false;
+		g_BlockIsSnowable[E_BLOCK_INACTIVE_COMPARATOR]   = false;
 		g_BlockIsSnowable[E_BLOCK_LAVA]                  = false;
 		g_BlockIsSnowable[E_BLOCK_LILY_PAD]              = false;
 		g_BlockIsSnowable[E_BLOCK_LOCKED_CHEST]          = false;
diff --git a/source/Blocks/BlockComparator.cpp b/source/Blocks/BlockComparator.cpp
new file mode 100644
index 000000000..e6fa64e2c
--- /dev/null
+++ b/source/Blocks/BlockComparator.cpp
@@ -0,0 +1,64 @@
+
+#include "Globals.h"
+#include "BlockComparator.h"
+#include "../Item.h"
+#include "../World.h"
+#include "../Simulator/RedstoneSimulator.h"
+#include "../Entities/Player.h"
+
+
+
+
+
+cBlockComparatorHandler::cBlockComparatorHandler(BLOCKTYPE a_BlockType)
+	: cBlockHandler(a_BlockType)
+{
+}
+
+
+
+
+
+void cBlockComparatorHandler::OnDestroyed(cWorld *a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	// Nothing needed yet
+}
+
+
+
+
+
+void cBlockComparatorHandler::OnUse(cWorld *a_World, cPlayer *a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ)
+{
+	NIBBLETYPE Meta = a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+	Meta ^= 0x04; // Toggle 3rd (addition/subtraction) bit with XOR
+	a_World->FastSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, Meta);
+}
+
+
+
+
+
+void cBlockComparatorHandler::OnDigging(cWorld *a_World, cPlayer *a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	OnUse(a_World, a_Player, a_BlockX, a_BlockY, a_BlockZ, BLOCK_FACE_NONE, 8, 8, 8);
+}
+
+
+
+
+bool cBlockComparatorHandler::GetPlacementBlockTypeMeta(
+	cWorld * a_World, cPlayer * a_Player,
+	int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, 
+	int a_CursorX, int a_CursorY, int a_CursorZ,
+	BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+)
+{
+	a_BlockType = m_BlockType;
+	a_BlockMeta = cRedstoneSimulator::RepeaterRotationToMetaData(a_Player->GetRotation());
+	return true;
+}
+
+
+
+
diff --git a/source/Blocks/BlockComparator.h b/source/Blocks/BlockComparator.h
new file mode 100644
index 000000000..208727107
--- /dev/null
+++ b/source/Blocks/BlockComparator.h
@@ -0,0 +1,57 @@
+
+#pragma once
+
+#include "BlockHandler.h"
+#include "../World.h"
+
+
+
+
+
+class cBlockComparatorHandler :
+	public cBlockHandler
+{
+public:
+	cBlockComparatorHandler(BLOCKTYPE a_BlockType);
+	virtual void OnDestroyed(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ) override;
+	
+	virtual void OnDigging(cWorld * a_World, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) override;
+	virtual void OnUse(cWorld * a_World, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override;
+
+
+	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
+	{
+		// Reset meta to 0
+		a_Pickups.push_back(cItem(E_ITEM_COMPARATOR, 1, 0));
+	}
+
+
+	virtual bool IsUseable(void) override
+	{
+		return true;
+	}
+	
+	
+	virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
+	{
+		return ((a_RelY > 0) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR));
+	}
+	
+
+	virtual bool GetPlacementBlockTypeMeta(
+		cWorld * a_World, cPlayer * a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, 
+		int a_CursorX, int a_CursorY, int a_CursorZ,
+		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+	) override;
+
+
+	virtual const char * GetStepSound(void) override
+	{
+		return "step.wood";
+	}
+} ;
+
+
+
+
diff --git a/source/Blocks/BlockHandler.cpp b/source/Blocks/BlockHandler.cpp
index e1cfebb56..43330befa 100644
--- a/source/Blocks/BlockHandler.cpp
+++ b/source/Blocks/BlockHandler.cpp
@@ -13,6 +13,7 @@
 #include "BlockChest.h"
 #include "BlockCloth.h"
 #include "BlockCobWeb.h"
+#include "BlockComparator.h"
 #include "BlockCrops.h"
 #include "BlockDeadBush.h"
 #include "BlockDirt.h"
@@ -110,6 +111,7 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_CAULDRON:              return new cBlockCauldronHandler        (a_BlockType);
 		case E_BLOCK_CHEST:                 return new cBlockChestHandler           (a_BlockType);
 		case E_BLOCK_COAL_ORE:              return new cBlockOreHandler             (a_BlockType);
+		case E_BLOCK_ACTIVE_COMPARATOR:     return new cBlockComparatorHandler      (a_BlockType);
 		case E_BLOCK_COBBLESTONE:           return new cBlockStoneHandler           (a_BlockType);
 		case E_BLOCK_COBBLESTONE_STAIRS:    return new cBlockStairsHandler          (a_BlockType);
 		case E_BLOCK_COBWEB:                return new cBlockCobWebHandler          (a_BlockType);
@@ -124,7 +126,7 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_DROPPER:               return new cBlockDropSpenserHandler     (a_BlockType);
 		case E_BLOCK_EMERALD_ORE:           return new cBlockOreHandler             (a_BlockType);
 		case E_BLOCK_ENDER_CHEST:           return new cBlockEnderchestHandler      (a_BlockType);
-		case E_BLOCK_FARMLAND:              return new cBlockFarmlandHandler;
+		case E_BLOCK_FARMLAND:              return new cBlockFarmlandHandler        (           );
 		case E_BLOCK_FENCE_GATE:            return new cBlockFenceGateHandler       (a_BlockType);
 		case E_BLOCK_FIRE:                  return new cBlockFireHandler            (a_BlockType);
 		case E_BLOCK_FLOWER_POT:            return new cBlockFlowerPotHandler       (a_BlockType);
@@ -136,6 +138,7 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_GRAVEL:                return new cBlockGravelHandler          (a_BlockType);
 		case E_BLOCK_HOPPER:                return new cBlockHopperHandler          (a_BlockType);
 		case E_BLOCK_ICE:                   return new cBlockIceHandler             (a_BlockType);
+		case E_BLOCK_INACTIVE_COMPARATOR:   return new cBlockComparatorHandler      (a_BlockType);
 		case E_BLOCK_IRON_DOOR:             return new cBlockDoorHandler            (a_BlockType);
 		case E_BLOCK_IRON_ORE:              return new cBlockOreHandler             (a_BlockType);
 		case E_BLOCK_JUKEBOX:               return new cBlockEntityHandler          (a_BlockType);
@@ -153,7 +156,7 @@ cBlockHandler * cBlockHandler::CreateBlockHandler(BLOCKTYPE a_BlockType)
 		case E_BLOCK_NETHER_BRICK_STAIRS:   return new cBlockStairsHandler          (a_BlockType);
 		case E_BLOCK_NOTE_BLOCK:            return new cBlockNoteHandler            (a_BlockType);
 		case E_BLOCK_PISTON:                return new cBlockPistonHandler          (a_BlockType);
-		case E_BLOCK_PISTON_EXTENSION:      return new cBlockPistonHeadHandler      ();
+		case E_BLOCK_PISTON_EXTENSION:      return new cBlockPistonHeadHandler      (           );
 		case E_BLOCK_PLANKS:                return new cBlockPlanksHandler          (a_BlockType);
 		case E_BLOCK_PUMPKIN:               return new cBlockPumpkinHandler         (a_BlockType);
 		case E_BLOCK_JACK_O_LANTERN:        return new cBlockPumpkinHandler         (a_BlockType);
diff --git a/source/Items/ItemComparator.h b/source/Items/ItemComparator.h
new file mode 100644
index 000000000..53dbd020d
--- /dev/null
+++ b/source/Items/ItemComparator.h
@@ -0,0 +1,40 @@
+
+#pragma once
+
+#include "ItemHandler.h"
+#include "../Simulator/RedstoneSimulator.h"
+
+
+
+
+
+class cItemComparatorHandler :
+	public cItemHandler
+{
+public:
+	cItemComparatorHandler(int a_ItemType) :
+		cItemHandler(a_ItemType)
+	{
+	}
+
+	virtual bool IsPlaceable(void) override
+	{
+		return true;
+	}
+
+	virtual bool GetPlacementBlockTypeMeta(
+		cWorld * a_World, cPlayer * a_Player,
+		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, 
+		int a_CursorX, int a_CursorY, int a_CursorZ,
+		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
+	) override
+	{
+		a_BlockType = E_BLOCK_INACTIVE_COMPARATOR;
+		a_BlockMeta = cRedstoneSimulator::RepeaterRotationToMetaData(a_Player->GetRotation());
+		return true;
+	}
+} ;
+
+
+
+
diff --git a/source/Items/ItemHandler.cpp b/source/Items/ItemHandler.cpp
index 3c2fa1e79..9d38e6f3a 100644
--- a/source/Items/ItemHandler.cpp
+++ b/source/Items/ItemHandler.cpp
@@ -14,6 +14,7 @@
 #include "ItemBucket.h"
 #include "ItemCauldron.h"
 #include "ItemCloth.h"
+#include "ItemComparator.h"
 #include "ItemDoor.h"
 #include "ItemDye.h"
 #include "ItemFlowerPot.h"
@@ -92,6 +93,7 @@ cItemHandler *cItemHandler::CreateItemHandler(int a_ItemType)
 		case E_ITEM_BOW:               return new cItemBowHandler;
 		case E_ITEM_BREWING_STAND:     return new cItemBrewingStandHandler(a_ItemType);
 		case E_ITEM_CAULDRON:          return new cItemCauldronHandler(a_ItemType);
+		case E_ITEM_COMPARATOR:        return new cItemComparatorHandler(a_ItemType);
 		case E_ITEM_DYE:               return new cItemDyeHandler(a_ItemType);
 		case E_ITEM_EGG:               return new cItemEggHandler();
 		case E_ITEM_ENDER_PEARL:       return new cItemEnderPearlHandler();