1 files changed, 253 insertions, 0 deletions
diff --git a/Minecraft.World/ComparatorTile.cpp b/Minecraft.World/ComparatorTile.cpp
new file mode 100644
index 00000000..f611424d
--- /dev/null
+++ b/Minecraft.World/ComparatorTile.cpp
@@ -0,0 +1,253 @@
+#include "stdafx.h"
+#include "net.minecraft.world.item.h"
+#include "net.minecraft.world.level.h"
+#include "net.minecraft.world.level.redstone.h"
+#include "net.minecraft.world.level.tile.h"
+#include "net.minecraft.world.level.tile.entity.h"
+#include "net.minecraft.h"
+#include "ComparatorTile.h"
+
+ComparatorTile::ComparatorTile(int id, bool on) : DiodeTile(id, on)
+{
+	_isEntityTile = true;
+}
+
+int ComparatorTile::getResource(int data, Random *random, int playerBonusLevel)
+{
+	return Item::comparator_Id;
+}
+
+int ComparatorTile::cloneTileId(Level *level, int x, int y, int z)
+{
+	return Item::comparator_Id;
+}
+
+int ComparatorTile::getTurnOnDelay(int data)
+{
+	return 2;
+}
+
+DiodeTile *ComparatorTile::getOnTile()
+{
+	return Tile::comparator_on;
+}
+
+DiodeTile *ComparatorTile::getOffTile()
+{
+	return Tile::comparator_off;
+}
+
+int ComparatorTile::getRenderShape()
+{
+	return SHAPE_COMPARATOR;
+}
+
+Icon *ComparatorTile::getTexture(int face, int data)
+{
+	bool isOn = on || (data & BIT_IS_LIT) != 0;
+	// down is used by the torch tesselator
+	if (face == Facing::DOWN)
+	{
+		if (isOn)
+		{
+			return Tile::redstoneTorch_on->getTexture(face);
+		}
+		return Tile::redstoneTorch_off->getTexture(face);
+	}
+	if (face == Facing::UP)
+	{
+		if (isOn)
+		{
+			return Tile::comparator_on->icon;
+		}
+		return icon;
+	}
+	// edge of stone half-step
+	return Tile::stoneSlab->getTexture(Facing::UP);
+}
+
+bool ComparatorTile::isOn(int data)
+{
+	return on || (data & BIT_IS_LIT) != 0;
+}
+
+int ComparatorTile::getOutputSignal(LevelSource *levelSource, int x, int y, int z, int data)
+{
+	return getComparator(levelSource, x, y, z)->getOutputSignal();
+}
+
+int ComparatorTile::calculateOutputSignal(Level *level, int x, int y, int z, int data)
+{
+	if (!isReversedOutputSignal(data))
+	{
+		return getInputSignal(level, x, y, z, data);
+	}
+	else
+	{
+		return max(getInputSignal(level, x, y, z, data) - getAlternateSignal(level, x, y, z, data), Redstone::SIGNAL_NONE);
+	}
+}
+
+bool ComparatorTile::isReversedOutputSignal(int data)
+{
+	return (data & BIT_OUTPUT_SUBTRACT) == BIT_OUTPUT_SUBTRACT;
+}
+
+bool ComparatorTile::shouldTurnOn(Level *level, int x, int y, int z, int data)
+{
+	int input = getInputSignal(level, x, y, z, data);
+	if (input >= Redstone::SIGNAL_MAX) return true;
+	if (input == Redstone::SIGNAL_NONE) return false;
+
+	int alt = getAlternateSignal(level, x, y, z, data);
+	if (alt == Redstone::SIGNAL_NONE) return true;
+
+	return input >= alt;
+}
+
+int ComparatorTile::getInputSignal(Level *level, int x, int y, int z, int data)
+{
+	int result = DiodeTile::getInputSignal(level, x, y, z, data);
+
+	int dir = getDirection(data);
+	int xx = x + Direction::STEP_X[dir];
+	int zz = z + Direction::STEP_Z[dir];
+	int tile = level->getTile(xx, y, zz);
+
+	if (tile > 0)
+	{
+		if (Tile::tiles[tile]->hasAnalogOutputSignal())
+		{
+			result = Tile::tiles[tile]->getAnalogOutputSignal(level, xx, y, zz, Direction::DIRECTION_OPPOSITE[dir]);
+		}
+		else if (result < Redstone::SIGNAL_MAX && Tile::isSolidBlockingTile(tile))
+		{
+			xx += Direction::STEP_X[dir];
+			zz += Direction::STEP_Z[dir];
+			tile = level->getTile(xx, y, zz);
+
+			if (tile > 0 && Tile::tiles[tile]->hasAnalogOutputSignal())
+			{
+				result = Tile::tiles[tile]->getAnalogOutputSignal(level, xx, y, zz, Direction::DIRECTION_OPPOSITE[dir]);
+			}
+		}
+	}
+
+	return result;
+}
+
+shared_ptr<ComparatorTileEntity> ComparatorTile::getComparator(LevelSource *level, int x, int y, int z)
+{
+	return dynamic_pointer_cast<ComparatorTileEntity>( level->getTileEntity(x, y, z) );
+}
+
+bool ComparatorTile::use(Level *level, int x, int y, int z, shared_ptr<Player> player, int clickedFace, float clickX, float clickY, float clickZ, bool soundOnly)
+{
+	int data = level->getData(x, y, z);
+	bool isOn = on || ( (data & BIT_IS_LIT) != 0 );
+	bool subtract = !isReversedOutputSignal(data);
+	int outputBit = subtract ? BIT_OUTPUT_SUBTRACT : 0;
+	outputBit |= isOn ? BIT_IS_LIT : 0;
+
+	level->playSound(x + 0.5, y + 0.5, z + 0.5, eSoundType_RANDOM_CLICK, 0.3f, subtract ? 0.55f : 0.5f);
+
+	if (!soundOnly)
+	{
+		level->setData(x, y, z, outputBit | (data & DIRECTION_MASK), Tile::UPDATE_CLIENTS);
+		refreshOutputState(level, x, y, z, level->random);
+	}
+
+	return true;
+}
+
+void ComparatorTile::checkTickOnNeighbor(Level *level, int x, int y, int z, int type)
+{
+	if (!level->isTileToBeTickedAt(x, y, z, id))
+	{
+		int data = level->getData(x, y, z);
+		int outputValue = calculateOutputSignal(level, x, y, z, data);
+		int oldValue = getComparator(level, x, y, z)->getOutputSignal();
+
+		if (outputValue != oldValue || (isOn(data) != shouldTurnOn(level, x, y, z, data)))
+		{
+			// prioritize locking comparators
+			if (shouldPrioritize(level, x, y, z, data))
+			{
+				level->addToTickNextTick(x, y, z, id, getTurnOnDelay(0), -1);
+			}
+			else
+			{
+				level->addToTickNextTick(x, y, z, id, getTurnOnDelay(0), 0);
+			}
+		}
+	}
+}
+
+void ComparatorTile::refreshOutputState(Level *level, int x, int y, int z, Random *random)
+{
+	int data = level->getData(x, y, z);
+	int outputValue = calculateOutputSignal(level, x, y, z, data);
+	int oldValue = getComparator(level, x, y, z)->getOutputSignal();
+	getComparator(level, x, y, z)->setOutputSignal(outputValue);
+
+	if (oldValue != outputValue || !isReversedOutputSignal(data))
+	{
+		bool sourceOn = shouldTurnOn(level, x, y, z, data);
+		bool isOn = on || (data & BIT_IS_LIT) != 0;
+		if (isOn && !sourceOn)
+		{
+			level->setData(x, y, z, data & ~BIT_IS_LIT, Tile::UPDATE_CLIENTS);
+		}
+		else if (!isOn && sourceOn)
+		{
+			level->setData(x, y, z, data | BIT_IS_LIT, Tile::UPDATE_CLIENTS);
+		}
+		updateNeighborsInFront(level, x, y, z);
+	}
+}
+
+void ComparatorTile::tick(Level *level, int x, int y, int z, Random *random)
+{
+	if (on)
+	{
+		// clean-up old tiles with the 'on' id
+		int data = level->getData(x, y, z);
+		level->setTileAndData(x, y, z, getOffTile()->id, data | BIT_IS_LIT, Tile::UPDATE_NONE);
+	}
+	refreshOutputState(level, x, y, z, random);
+}
+
+void ComparatorTile::onPlace(Level *level, int x, int y, int z)
+{
+	DiodeTile::onPlace(level, x, y, z);
+	level->setTileEntity(x, y, z, newTileEntity(level));
+}
+
+void ComparatorTile::onRemove(Level *level, int x, int y, int z, int id, int data)
+{
+	DiodeTile::onRemove(level, x, y, z, id, data);
+	level->removeTileEntity(x, y, z);
+
+	updateNeighborsInFront(level, x, y, z);
+}
+
+bool ComparatorTile::triggerEvent(Level *level, int x, int y, int z, int b0, int b1)
+{
+	DiodeTile::triggerEvent(level, x, y, z, b0, b1);
+	shared_ptr<TileEntity> te = level->getTileEntity(x, y, z);
+	if (te != NULL)
+	{
+		return te->triggerEvent(b0, b1);
+	}
+	return false;
+}
+
+shared_ptr<TileEntity> ComparatorTile::newTileEntity(Level *level)
+{
+	return shared_ptr<ComparatorTileEntity>( new ComparatorTileEntity() );
+}
+
+bool ComparatorTile::TestUse()
+{
+	return true;
+}
+\ No newline at end of file