14 files changed, 728 insertions, 87 deletions

diff --git a/source/Entities/Entity.cpp b/source/Entities/Entity.cpp
index b9810aabb..56fd36a05 100644
--- a/source/Entities/Entity.cpp
+++ b/source/Entities/Entity.cpp
@@ -144,6 +144,10 @@ bool cEntity::Initialize(cWorld * a_World)
 	m_World->AddEntity(this);
 	
 	cPluginManager::Get()->CallHookSpawnedEntity(*a_World, *this);
+	
+	// Spawn the entity on the clients:
+	a_World->BroadcastSpawnEntity(*this);
+	
 	return true;
 }
 
@@ -477,7 +481,7 @@ void cEntity::Tick(float a_Dt, cChunk & a_Chunk)
 void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 {
 	// TODO Add collision detection with entities.
-	a_Dt /= 1000;
+	a_Dt /= 1000;  // Convert from msec to sec
 	Vector3d NextPos = Vector3d(GetPosX(),GetPosY(),GetPosZ());
 	Vector3d NextSpeed = Vector3d(GetSpeedX(),GetSpeedY(),GetSpeedZ());
 	int BlockX = (int) floor(NextPos.x);
@@ -493,7 +497,7 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 	}
 	
 	// Make sure we got the correct chunk and a valid one. No one ever knows...
-	cChunk * NextChunk = a_Chunk.GetNeighborChunk(BlockX,BlockZ);
+	cChunk * NextChunk = a_Chunk.GetNeighborChunk(BlockX, BlockZ);
 	if (NextChunk != NULL)
 	{
 		int RelBlockX = BlockX - (NextChunk->GetPosX() * cChunkDef::Width);
@@ -513,11 +517,12 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 		}
 		else
 		{
-			//Push out entity.
+			// Push out entity.
 			m_bOnGround = true;
 			NextPos.y += 0.2;
-			LOGD("Entity #%d (%s) is inside a block at {%d,%d,%d}",
-				m_UniqueID, GetClass(), BlockX, BlockY, BlockZ);
+			LOGD("Entity #%d (%s) is inside a block at {%d, %d, %d}",
+				m_UniqueID, GetClass(), BlockX, BlockY, BlockZ
+			);
 		}
 
 		if (!m_bOnGround)
@@ -525,16 +530,16 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 			float fallspeed;
 			if (IsBlockWater(BlockIn))
 			{
-				fallspeed = -3.0f * a_Dt; //Fall slower in water.
+				fallspeed = m_Gravity * a_Dt / 3;  // Fall 3x slower in water.
 			}
 			else if (BlockIn == E_BLOCK_COBWEB)
 			{
-				NextSpeed.y *= 0.05; //Reduce overall falling speed
-				fallspeed = 0; //No falling.
+				NextSpeed.y *= 0.05;  // Reduce overall falling speed
+				fallspeed = 0;  // No falling.
 			}
 			else
 			{
-				//Normal gravity
+				// Normal gravity
 				fallspeed = m_Gravity * a_Dt;
 			}
 			NextSpeed.y += fallspeed;
@@ -548,19 +553,25 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 				(BlockBelow != E_BLOCK_ACTIVATOR_RAIL)
 				)
 			{
-				//Friction
+				// Friction
 				if (NextSpeed.SqrLength() > 0.0004f)
 				{
-					NextSpeed.x *= 0.7f/(1+a_Dt);
-					if ( fabs(NextSpeed.x) < 0.05 ) NextSpeed.x = 0;
-					NextSpeed.z *= 0.7f/(1+a_Dt);
-					if ( fabs(NextSpeed.z) < 0.05 ) NextSpeed.z = 0;
+					NextSpeed.x *= 0.7f / (1 + a_Dt);
+					if (fabs(NextSpeed.x) < 0.05)
+					{
+						NextSpeed.x = 0;
+					}
+					NextSpeed.z *= 0.7f / (1 + a_Dt);
+					if (fabs(NextSpeed.z) < 0.05)
+					{
+						NextSpeed.z = 0;
+					}
 				}
 			}
 		}
 
-		//Adjust X and Z speed for COBWEB temporary. This speed modification should be handled inside block handlers since we
-		//might have different speed modifiers according to terrain.
+		// Adjust X and Z speed for COBWEB temporary. This speed modification should be handled inside block handlers since we
+		// might have different speed modifiers according to terrain.
 		if (BlockIn == E_BLOCK_COBWEB)
 		{
 			NextSpeed.x *= 0.25;
@@ -1037,9 +1048,9 @@ void cEntity::SetMass(double a_Mass)
 	}
 	else
 	{
-		//Make sure that mass is not zero. 1g is the default because we 
-		//have to choose a number. It's perfectly legal to have a mass 
-		//less than 1g as long as is NOT equal or less than zero.
+		// Make sure that mass is not zero. 1g is the default because we 
+		// have to choose a number. It's perfectly legal to have a mass 
+		// less than 1g as long as is NOT equal or less than zero.
 		m_Mass = 0.001;
 	}
 }
diff --git a/source/Entities/Entity.h b/source/Entities/Entity.h
index 119cb2fe5..2d058abae 100644
--- a/source/Entities/Entity.h
+++ b/source/Entities/Entity.h
@@ -90,12 +90,13 @@ public:
 		etPlayer,
 		etPickup,
 		etMonster,
-		etMob = etMonster,  // DEPRECATED, use etMonster instead!
 		etFallingBlock,
 		etMinecart,
 		etTNT,
+		etProjectile,
 		
 		// DEPRECATED older constants, left over for compatibility reasons (plugins)
+		etMob = etMonster,  // DEPRECATED, use etMonster instead!
 		eEntityType_Entity = etEntity,
 		eEntityType_Player = etPlayer,
 		eEntityType_Pickup = etPickup,
@@ -162,7 +163,7 @@ public:
 	void SetPosY    (double a_PosY);
 	void SetPosZ    (double a_PosZ);
 	void SetPosition(double a_PosX, double a_PosY, double a_PosZ);
-	void SetPosition(const Vector3d & a_Pos) { SetPosition(a_Pos.x,a_Pos.y,a_Pos.z);}
+	void SetPosition(const Vector3d & a_Pos) { SetPosition(a_Pos.x, a_Pos.y, a_Pos.z); }
 	void SetRot     (const Vector3f & a_Rot);
 	void SetRotation(double a_Rotation);
 	void SetPitch   (double a_Pitch);
@@ -276,9 +277,8 @@ public:
 
 	/** Descendants override this function to send a command to the specified client to spawn the entity on the client.
 	To spawn on all eligible clients, use cChunkMap::BroadcastSpawnEntity()
-	Needs to have a default implementation due to Lua bindings.
 	*/
-	virtual void SpawnOn(cClientHandle & a_Client) {ASSERT(!"SpawnOn() unimplemented!"); }
+	virtual void SpawnOn(cClientHandle & a_Client) = 0;
 
 	// tolua_begin
 	
diff --git a/source/Entities/FallingBlock.cpp b/source/Entities/FallingBlock.cpp
index 237327975..9fcd9ac80 100644
--- a/source/Entities/FallingBlock.cpp
+++ b/source/Entities/FallingBlock.cpp
@@ -22,20 +22,6 @@ cFallingBlock::cFallingBlock(const Vector3i & a_BlockPosition, BLOCKTYPE a_Block
 
 
 
-bool cFallingBlock::Initialize(cWorld * a_World)
-{
-	if (super::Initialize(a_World))
-	{
-		a_World->BroadcastSpawnEntity(*this);
-		return true;
-	}
-	return false;
-}
-
-
-
-
-
 void cFallingBlock::SpawnOn(cClientHandle & a_ClientHandle)
 {
 	a_ClientHandle.SendSpawnFallingBlock(*this);
diff --git a/source/Entities/FallingBlock.h b/source/Entities/FallingBlock.h
index 13931f061..5ba9909bb 100644
--- a/source/Entities/FallingBlock.h
+++ b/source/Entities/FallingBlock.h
@@ -29,7 +29,6 @@ public:
 	NIBBLETYPE GetBlockMeta(void) const { return m_BlockMeta; }
 	
 	// cEntity overrides:
-	virtual bool Initialize(cWorld * a_World) override;
 	virtual void SpawnOn(cClientHandle & a_ClientHandle) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
 	
diff --git a/source/Entities/Minecart.cpp b/source/Entities/Minecart.cpp
index 9a92df38e..685067e79 100644
--- a/source/Entities/Minecart.cpp
+++ b/source/Entities/Minecart.cpp
@@ -26,20 +26,6 @@ cMinecart::cMinecart(ePayload a_Payload, double a_X, double a_Y, double a_Z) :
 
 
 
-bool cMinecart::Initialize(cWorld * a_World)
-{
-	if (super::Initialize(a_World))
-	{
-		a_World->BroadcastSpawnEntity(*this);
-		return true;
-	}
-	return false;
-}
-
-
-
-
-
 void cMinecart::SpawnOn(cClientHandle & a_ClientHandle)
 {
 	char SubType = 0;
diff --git a/source/Entities/Minecart.h b/source/Entities/Minecart.h
index b3386fbc9..f98b02bb5 100644
--- a/source/Entities/Minecart.h
+++ b/source/Entities/Minecart.h
@@ -35,7 +35,6 @@ public:
 	} ;
 	
 	// cEntity overrides:
-	virtual bool Initialize(cWorld * a_World) override;
 	virtual void SpawnOn(cClientHandle & a_ClientHandle) override;
 	virtual void HandlePhysics(float a_Dt, cChunk & a_Chunk) override;
 	void HandleRailPhysics(float a_Dt, cChunk & a_Chunk);
diff --git a/source/Entities/Pickup.cpp b/source/Entities/Pickup.cpp
index 0417b861d..9b388366a 100644
--- a/source/Entities/Pickup.cpp
+++ b/source/Entities/Pickup.cpp
@@ -40,20 +40,6 @@ cPickup::cPickup(int a_MicroPosX, int a_MicroPosY, int a_MicroPosZ, const cItem
 
 
 
-bool cPickup::Initialize(cWorld * a_World)
-{
-	if (super::Initialize(a_World))
-	{
-		a_World->BroadcastSpawnEntity(*this);
-		return true;
-	}
-	return false;
-}
-
-
-
-
-
 void cPickup::SpawnOn(cClientHandle & a_Client)
 {
 	a_Client.SendPickupSpawn(*this);	
@@ -73,18 +59,19 @@ void cPickup::Tick(float a_Dt, cChunk & a_Chunk)
 	if (!m_bCollected)
 	{
 		int BlockY = (int) floor(GetPosY());
-		if (BlockY < cChunkDef::Height)  // Don't do anything except for falling when above the world
+		if ((BlockY >= 0) && (BlockY < cChunkDef::Height))  // Don't do anything except for falling when outside the world
 		{
 			int BlockX = (int) floor(GetPosX());
 			int BlockZ = (int) floor(GetPosZ());
-			//Position might have changed due to physics. So we have to make sure we have the correct chunk.
+			// Position might have changed due to physics. So we have to make sure we have the correct chunk.
 			cChunk * CurrentChunk = a_Chunk.GetNeighborChunk(BlockX, BlockZ);
 			if (CurrentChunk != NULL)  // Make sure the chunk is loaded
 			{
 				int RelBlockX = BlockX - (CurrentChunk->GetPosX() * cChunkDef::Width);
 				int RelBlockZ = BlockZ - (CurrentChunk->GetPosZ() * cChunkDef::Width);
 				
-				BLOCKTYPE BlockBelow = CurrentChunk->GetBlock(RelBlockX, BlockY - 1, RelBlockZ);
+				// If the pickup is on the bottommost block position, make it think the void is made of air: (#131)
+				BLOCKTYPE BlockBelow = (BlockY > 0) ? CurrentChunk->GetBlock(RelBlockX, BlockY - 1, RelBlockZ) : E_BLOCK_AIR;
 				BLOCKTYPE BlockIn = CurrentChunk->GetBlock(RelBlockX, BlockY, RelBlockZ);
 
 				if (
diff --git a/source/Entities/Pickup.h b/source/Entities/Pickup.h
index b0323dd92..af6eaf3bb 100644
--- a/source/Entities/Pickup.h
+++ b/source/Entities/Pickup.h
@@ -26,8 +26,6 @@ public:
 
 	cPickup(int a_MicroPosX, int a_MicroPosY, int a_MicroPosZ, const cItem & a_Item, float a_SpeedX = 0.f, float a_SpeedY = 0.f, float a_SpeedZ = 0.f);	// tolua_export
 	
-	virtual bool Initialize(cWorld * a_World) override;
-
 	cItem &       GetItem(void)       {return m_Item; }								// tolua_export
 	const cItem & GetItem(void) const {return m_Item; }
 
diff --git a/source/Entities/Player.cpp b/source/Entities/Player.cpp
index 3ccb4ca1d..0943f61ff 100644
--- a/source/Entities/Player.cpp
+++ b/source/Entities/Player.cpp
@@ -64,6 +64,8 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName)
 	, m_IsSwimming(false)
 	, m_IsSubmerged(false)
 	, m_EatingFinishTick(-1)
+	, m_IsChargingBow(false)
+	, m_BowCharge(0)
 {
 	LOGD("Created a player object for \"%s\" @ \"%s\" at %p, ID %d", 
 		a_PlayerName.c_str(), a_Client->GetIPString().c_str(),
@@ -200,6 +202,12 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 		}
 	}
 	
+	if (!a_Chunk.IsValid())
+	{
+		// This may happen if the cPlayer is created before the chunks have the chance of being loaded / generated (#83)
+		return;
+	}
+	
 	super::Tick(a_Dt, a_Chunk);
 	
 	// Set player swimming state
@@ -207,6 +215,13 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 
 	// Handle air drowning stuff
 	HandleAir();
+	
+	// Handle charging the bow:
+	if (m_IsChargingBow)
+	{
+		m_BowCharge += 1;
+		LOGD("Player \"%s\" charging bow: %d", m_PlayerName.c_str(), m_BowCharge);
+	}
 
 	if (m_bDirtyPosition)
 	{
@@ -247,6 +262,41 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 
 
 
+void cPlayer::StartChargingBow(void)
+{
+	LOGD("Player \"%s\" started charging their bow", m_PlayerName.c_str());
+	m_IsChargingBow = true;
+	m_BowCharge = 0;
+}
+
+
+
+
+
+int cPlayer::FinishChargingBow(void)
+{
+	LOGD("Player \"%s\" finished charging their bow at a charge of %d", m_PlayerName.c_str(), m_BowCharge);
+	int res = m_BowCharge;
+	m_IsChargingBow = false;
+	m_BowCharge = 0;
+	return res;
+}
+
+
+
+
+
+void cPlayer::CancelChargingBow(void)
+{
+	LOGD("Player \"%s\" cancelled charging their bow at a charge of %d", m_PlayerName.c_str(), m_BowCharge);
+	m_IsChargingBow = false;
+	m_BowCharge = 0;
+}
+
+
+
+
+
 void cPlayer::SetTouchGround(bool a_bTouchGround)
 {
 	// If just
@@ -807,6 +857,36 @@ void cPlayer::TeleportToCoords(double a_PosX, double a_PosY, double a_PosZ)
 
 
 
+Vector3d cPlayer::GetThrowStartPos(void) const
+{
+	Vector3d res = GetEyePosition();
+	
+	// Adjust the position to be just outside the player's bounding box:
+	res.x += 0.16 * cos(GetPitch());
+	res.y += -0.1;
+	res.z += 0.16 * sin(GetPitch());
+	
+	return res;
+}
+
+
+
+
+
+Vector3d cPlayer::GetThrowSpeed(double a_SpeedCoeff) const
+{
+	Vector3d res = GetLookVector();
+	res.Normalize();
+	
+	// TODO: Add a slight random change (+-0.0075 in each direction)
+	
+	return res * a_SpeedCoeff;
+}	
+
+
+
+
+
 void cPlayer::MoveTo( const Vector3d & a_NewPos )
 {
 	if ((a_NewPos.y < -990) && (GetPosY() > -100))
diff --git a/source/Entities/Player.h b/source/Entities/Player.h
index 5dcce8421..82ff48954 100644
--- a/source/Entities/Player.h
+++ b/source/Entities/Player.h
@@ -62,6 +62,18 @@ public:
 	
 	/// Returns the currently equipped boots; empty item if none
 	virtual cItem GetEquippedBoots(void) const override { return m_Inventory.GetEquippedBoots(); }
+	
+	/// Starts charging the equipped bow
+	void StartChargingBow(void);
+	
+	/// Finishes charging the current bow. Returns the number of ticks for which the bow has been charged
+	int FinishChargingBow(void);
+	
+	/// Cancels the current bow charging
+	void CancelChargingBow(void);
+	
+	/// Returns true if the player is currently charging the bow
+	bool IsChargingBow(void) const { return m_IsChargingBow; }
 
 	void SetTouchGround( bool a_bTouchGround );
 	inline void SetStance( const double a_Stance ) { m_Stance = a_Stance; }
@@ -78,6 +90,12 @@ public:
 
 	// tolua_begin
 	
+	/// Returns the position where projectiles thrown by this player should start, player eye position + adjustment
+	Vector3d GetThrowStartPos(void) const;
+	
+	/// Returns the initial speed vector of a throw, with a 3D length of a_SpeedCoeff.
+	Vector3d GetThrowSpeed(double a_SpeedCoeff) const;
+	
 	/// Returns the current gamemode. Partly OBSOLETE, you should use IsGameModeXXX() functions wherever applicable
 	eGameMode GetGameMode(void) const { return m_GameMode; }
 	
@@ -351,6 +369,9 @@ protected:
 
 	/// The world tick in which eating will be finished. -1 if not eating
 	Int64 m_EatingFinishTick;
+	
+	bool m_IsChargingBow;
+	int  m_BowCharge;
 
 	virtual void Destroyed(void);
 
diff --git a/source/Entities/ProjectileEntity.cpp b/source/Entities/ProjectileEntity.cpp
new file mode 100644
index 000000000..91b2c97a8
--- /dev/null
+++ b/source/Entities/ProjectileEntity.cpp
@@ -0,0 +1,351 @@
+
+// ProjectileEntity.cpp
+
+// Implements the cProjectileEntity class representing the common base class for projectiles, as well as individual projectile types
+
+#include "Globals.h"
+#include "ProjectileEntity.h"
+#include "../ClientHandle.h"
+#include "Player.h"
+#include "../LineBlockTracer.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cProjectileTracerCallback:
+
+class cProjectileTracerCallback :
+	public cBlockTracer::cCallbacks
+{
+public:
+	cProjectileTracerCallback(cProjectileEntity * a_Projectile) :
+		m_Projectile(a_Projectile)
+	{
+	}
+	
+protected:
+	cProjectileEntity * m_Projectile;
+	
+	virtual bool OnNextBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, char a_EntryFace) override
+	{
+		if (g_BlockIsSolid[a_BlockType])
+		{
+			// The projectile hit a solid block
+			m_Projectile->OnHitSolidBlock(a_BlockX, a_BlockY, a_BlockZ, a_EntryFace);
+			return true;
+		}
+		
+		// Convey some special effects from special blocks:
+		switch (a_BlockType)
+		{
+			case E_BLOCK_LAVA:
+			case E_BLOCK_STATIONARY_LAVA:
+			{
+				m_Projectile->StartBurning(30);
+				break;
+			}
+			case E_BLOCK_WATER:
+			case E_BLOCK_STATIONARY_WATER:
+			{
+				m_Projectile->StopBurning();
+				break;
+			}
+		}  // switch (a_BlockType)
+		
+		// Continue tracing
+		return false;
+	}
+} ;
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cProjectileEntity:
+
+cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, double a_Width, double a_Height) :
+	super(etProjectile, a_X, a_Y, a_Z, a_Width, a_Height),
+	m_ProjectileKind(a_Kind),
+	m_Creator(a_Creator),
+	m_IsInGround(false)
+{
+}
+
+
+
+
+
+cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Vector3d & a_Pos, const Vector3d & a_Speed, double a_Width, double a_Height) :
+	super(etProjectile, a_Pos.x, a_Pos.y, a_Pos.z, a_Width, a_Height),
+	m_ProjectileKind(a_Kind),
+	m_Creator(a_Creator),
+	m_IsInGround(false)
+{
+	SetSpeed(a_Speed);
+}
+
+
+
+
+
+cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d * a_Speed)
+{
+	Vector3d Speed;
+	if (a_Speed != NULL)
+	{
+		Speed = *a_Speed;
+	}
+
+	switch (a_Kind)
+	{
+		case pkArrow:      return new cArrowEntity           (a_Creator, a_X, a_Y, a_Z, Speed);
+		case pkEgg:        return new cThrownEggEntity       (a_Creator, a_X, a_Y, a_Z, Speed);
+		case pkEnderPearl: return new cThrownEnderPearlEntity(a_Creator, a_X, a_Y, a_Z, Speed);
+		case pkSnowball:   return new cThrownSnowballEntity  (a_Creator, a_X, a_Y, a_Z, Speed);
+		// TODO: the rest
+	}
+	
+	LOGWARNING("%s: Unknown projectile kind: %d", __FUNCTION__, a_Kind);
+	return NULL;
+}
+
+
+
+
+
+void cProjectileEntity::OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace)
+{
+	// TODO: Set proper position based on what face was hit
+	switch (a_BlockFace)
+	{
+		case BLOCK_FACE_TOP:    SetPosition(0.5 + a_BlockX, 1.0 + a_BlockY, 0.5 + a_BlockZ); break;
+		case BLOCK_FACE_BOTTOM: SetPosition(0.5 + a_BlockX,       a_BlockY, 0.5 + a_BlockZ); break;
+		case BLOCK_FACE_EAST:   SetPosition(      a_BlockX, 0.5 + a_BlockY, 0.5 + a_BlockZ); break;
+		case BLOCK_FACE_WEST:   SetPosition(1.0 + a_BlockX, 0.5 + a_BlockY, 0.5 + a_BlockZ); break;
+		case BLOCK_FACE_NORTH:  SetPosition(0.5 + a_BlockX, 0.5 + a_BlockY, 1.0 + a_BlockZ); break;
+		case BLOCK_FACE_SOUTH:  SetPosition(0.5 + a_BlockX, 0.5 + a_BlockY,       a_BlockZ); break;
+		case BLOCK_FACE_NONE:   SetPosition(0.5 + a_BlockX, 0.5 + a_BlockY, 0.5 + a_BlockZ); break;
+	}
+	SetSpeed(0, 0, 0);
+
+	// DEBUG:
+	LOGD("Projectile %d: pos {%.02f, %.02f, %.02f}, hit solid block at face %d",
+		m_UniqueID,
+		GetPosX(), GetPosY(), GetPosZ(),
+		a_BlockFace
+	);
+
+	m_IsInGround = true;
+}
+
+
+
+
+
+AString cProjectileEntity::GetMCAClassName(void) const
+{
+	switch (m_ProjectileKind)
+	{
+		case pkArrow:         return "Arrow";
+		case pkSnowball:      return "Snowball";
+		case pkEgg:           return "Egg";
+		case pkGhastFireball: return "Fireball";
+		case pkFireCharge:    return "SmallFireball";
+		case pkEnderPearl:    return "ThrownEnderPearl";
+		case pkExpBottle:     return "ThrownExpBottle";
+		case pkSplashPotion:  return "ThrownPotion";
+		case pkWitherSkull:   return "WitherSkull";
+		case pkFishingFloat:  return "";  // Unknown, perhaps MC doesn't save this?
+	}
+	ASSERT(!"Unhandled projectile entity kind!");
+	return "";
+}
+
+
+
+
+
+void cProjectileEntity::Tick(float a_Dt, cChunk & a_Chunk)
+{
+	super::Tick(a_Dt, a_Chunk);
+	BroadcastMovementUpdate();
+}
+
+
+
+
+
+void cProjectileEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
+{
+	if (m_IsInGround)
+	{
+		// Already-grounded projectiles don't move at all
+		return;
+	}
+	
+	Vector3d PerTickSpeed = GetSpeed() / 20;
+	Vector3d Pos = GetPosition();
+	
+	// Trace the tick's worth of movement as a line:
+	Vector3d NextPos = Pos + PerTickSpeed;
+	cProjectileTracerCallback TracerCallback(this);
+	if (cLineBlockTracer::Trace(*m_World, TracerCallback, Pos, NextPos))
+	{
+		// Nothing in the way, update the position
+		SetPosition(NextPos);
+	}
+	
+	// Add gravity effect to the vertical speed component:
+	SetSpeedY(GetSpeedY() + m_Gravity / 20);
+
+	// DEBUG:
+	LOGD("Arrow %d: pos {%.02f, %.02f, %.02f}, speed {%.02f, %.02f, %.02f}",
+		m_UniqueID,
+		GetPosX(), GetPosY(), GetPosZ(),
+		GetSpeedX(), GetSpeedY(), GetSpeedZ()
+	);
+}
+
+
+
+
+
+void cProjectileEntity::SpawnOn(cClientHandle & a_Client)
+{
+	// Default spawning - use the projectile kind to spawn an object:
+	a_Client.SendSpawnObject(*this, m_ProjectileKind, 0, 0, 0);
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cArrowEntity:
+
+cArrowEntity::cArrowEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
+	super(pkArrow, a_Creator, a_X, a_Y, a_Z, 0.5, 0.5),
+	m_PickupState(psNoPickup),
+	m_DamageCoeff(2)
+{
+	SetSpeed(a_Speed);
+	SetMass(0.1);
+	LOGD("Created arrow %d with speed {%.02f, %.02f, %.02f}",
+		m_UniqueID, GetSpeedX(), GetSpeedY(), GetSpeedZ()
+	);
+}
+
+
+
+
+
+cArrowEntity::cArrowEntity(cPlayer & a_Player, double a_Force) :
+	super(pkArrow, &a_Player, a_Player.GetThrowStartPos(), a_Player.GetThrowSpeed(a_Force * 1.5 * 20), 0.5, 0.5),
+	m_PickupState(psInSurvivalOrCreative),
+	m_DamageCoeff(2)
+{
+}
+
+
+
+
+
+bool cArrowEntity::CanPickup(const cPlayer & a_Player) const
+{
+	switch (m_PickupState)
+	{
+		case psNoPickup:             return false;
+		case psInSurvivalOrCreative: return (a_Player.IsGameModeSurvival() || a_Player.IsGameModeCreative());
+		case psInCreative:           return a_Player.IsGameModeCreative();
+	}
+	ASSERT(!"Unhandled pickup state");
+	return false;
+}
+
+
+
+
+
+void cArrowEntity::SpawnOn(cClientHandle & a_Client)
+{
+	a_Client.SendSpawnObject(*this, pkArrow, 0, 0, 0);
+}
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cThrownEggEntity:
+
+cThrownEggEntity::cThrownEggEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
+	super(pkEgg, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
+{
+	SetSpeed(a_Speed);
+}
+
+
+
+
+
+void cThrownEggEntity::OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace)
+{
+	// TODO: Random-spawn a chicken or four
+	
+	Destroy();
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cThrownEnderPearlEntity :
+
+cThrownEnderPearlEntity::cThrownEnderPearlEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
+	super(pkEnderPearl, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
+{
+	SetSpeed(a_Speed);
+}
+
+
+
+
+
+void cThrownEnderPearlEntity::OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace)
+{
+	// TODO: Teleport the creator here, make them take 5 damage
+	
+	Destroy();
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cThrownSnowballEntity :
+
+cThrownSnowballEntity::cThrownSnowballEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed) :
+	super(pkSnowball, a_Creator, a_X, a_Y, a_Z, 0.25, 0.25)
+{
+	SetSpeed(a_Speed);
+}
+
+
+
+
+
+void cThrownSnowballEntity::OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace)
+{
+	// TODO: Apply damage to certain mobs (blaze etc.) and anger all mobs
+	
+	Destroy();
+}
+
+
+
+
+
diff --git a/source/Entities/ProjectileEntity.h b/source/Entities/ProjectileEntity.h
new file mode 100644
index 000000000..95dc00abc
--- /dev/null
+++ b/source/Entities/ProjectileEntity.h
@@ -0,0 +1,238 @@
+
+// ProjectileEntity.h
+
+// Declares the cProjectileEntity class representing the common base class for projectiles, as well as individual projectile types
+
+
+
+
+
+#pragma once
+
+#include "Entity.h"
+
+
+
+
+
+// tolua_begin
+
+class cProjectileEntity :
+	public cEntity
+{
+	typedef cEntity super;
+	
+public:
+	/// The kind of the projectile. The numbers correspond to the network type ID used for spawning via the 0x17 packet.
+	enum eKind
+	{
+		pkArrow         = 60,
+		pkSnowball      = 61,
+		pkEgg           = 62,
+		pkGhastFireball = 63,
+		pkFireCharge    = 64,
+		pkEnderPearl    = 65,
+		pkExpBottle     = 75,
+		pkSplashPotion  = 73,
+		pkWitherSkull   = 66,
+		pkFishingFloat  = 90,
+	} ;
+	
+	// tolua_end
+	
+	CLASS_PROTODEF(cProjectileEntity);
+
+	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, double a_Width, double a_Height);
+	cProjectileEntity(eKind a_Kind, cEntity * a_Creator, const Vector3d & a_Pos, const Vector3d & a_Speed, double a_Width, double a_Height);
+	
+	static cProjectileEntity * Create(eKind a_Kind, cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d * a_Speed = NULL);
+	
+	/// Called by the physics blocktracer when the entity hits a solid block, the block's coords and the face hit is given
+	virtual void OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace);
+	
+	// tolua_begin
+
+	/// Returns the kind of the projectile (fast class identification)
+	eKind GetProjectileKind(void) const { return m_ProjectileKind; }
+	
+	/// Returns the entity who created this projectile; may be NULL
+	cEntity * GetCreator(void) { return m_Creator; }
+	
+	/// Returns the string that is used as the entity type (class name) in MCA files
+	AString GetMCAClassName(void) const;
+	
+	/// Returns true if the projectile has hit the ground and is stuck there
+	bool IsInGround(void) const { return m_IsInGround; }
+	
+protected:
+	eKind m_ProjectileKind;
+	
+	/// The entity who has created this projectile; may be NULL (e. g. for dispensers)
+	cEntity * m_Creator;
+	
+	/// True if the projectile has hit the ground and is stuck there
+	bool m_IsInGround;
+	
+	// tolua_end
+	
+	// cEntity overrides:
+	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;
+	virtual void HandlePhysics(float a_Dt, cChunk & a_Chunk) override;
+	virtual void SpawnOn(cClientHandle & a_Client) override;
+	
+	// tolua_begin
+} ;
+
+
+
+
+
+class cArrowEntity :
+	public cProjectileEntity
+{
+	typedef cProjectileEntity super;
+	
+public:
+	/// Determines when the arrow can be picked up (depending on player gamemode). Corresponds to the MCA file "pickup" field
+	enum ePickupState
+	{
+		psNoPickup             = 0,
+		psInSurvivalOrCreative = 1,
+		psInCreative           = 2,
+	} ;
+
+	// tolua_end
+	
+	CLASS_PROTODEF(cArrowEntity);
+
+	/// Creates a new arrow with psNoPickup state and default damage modifier coeff
+	cArrowEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed);
+	
+	/// Creates a new arrow as shot by a player, initializes it from the player object
+	cArrowEntity(cPlayer & a_Player, double a_Force);
+	
+	// tolua_begin
+	
+	/// Returns whether the arrow can be picked up by players
+	ePickupState GetPickupState(void) const { return m_PickupState; }
+	
+	/// Sets a new pickup state
+	void SetPickupState(ePickupState a_PickupState) { m_PickupState = a_PickupState; }
+	
+	/// Returns the damage modifier coeff.
+	double GetDamageCoeff(void) const { return m_DamageCoeff; }
+	
+	/// Sets the damage modifier coeff
+	void SetDamageCoeff(double a_DamageCoeff) { m_DamageCoeff = a_DamageCoeff; }
+	
+	/// Returns true if the specified player can pick the arrow up
+	bool CanPickup(const cPlayer & a_Player) const;
+	
+	// tolua_end
+	
+protected:
+
+	/// Determines when the arrow can be picked up by players
+	ePickupState m_PickupState;
+	
+	/// The coefficient applied to the damage that the arrow will deal, based on the bow enchantment. 2.0 for normal arrow
+	double m_DamageCoeff;
+
+	// cProjectileEntity overrides:
+	virtual void SpawnOn(cClientHandle & a_Client) override;
+	
+	// tolua_begin
+} ;
+
+
+
+
+
+class cThrownEggEntity :
+	public cProjectileEntity
+{
+	typedef cProjectileEntity super;
+	
+public:
+
+	// tolua_end
+	
+	CLASS_PROTODEF(cThrownEggEntity);
+
+	cThrownEggEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed);
+	
+protected:
+
+	// tolua_end
+	
+	// cProjectileEntity overrides:
+	virtual void OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace) override;
+
+	// tolua_begin
+	
+} ;
+
+
+
+
+
+class cThrownEnderPearlEntity :
+	public cProjectileEntity
+{
+	typedef cProjectileEntity super;
+	
+public:
+
+	// tolua_end
+	
+	CLASS_PROTODEF(cThrownEnderPearlEntity);
+
+	cThrownEnderPearlEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed);
+	
+protected:
+
+	// tolua_end
+	
+	// cProjectileEntity overrides:
+	virtual void OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace) override;
+
+	// tolua_begin
+	
+} ;
+
+
+
+
+
+class cThrownSnowballEntity :
+	public cProjectileEntity
+{
+	typedef cProjectileEntity super;
+	
+public:
+
+	// tolua_end
+	
+	CLASS_PROTODEF(cThrownSnowballEntity);
+
+	cThrownSnowballEntity(cEntity * a_Creator, double a_X, double a_Y, double a_Z, const Vector3d & a_Speed);
+	
+protected:
+
+	// tolua_end
+	
+	// cProjectileEntity overrides:
+	virtual void OnHitSolidBlock(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace) override;
+
+	// tolua_begin
+	
+} ;
+
+
+
+
+
+// tolua_end
+
+
+
diff --git a/source/Entities/TNTEntity.cpp b/source/Entities/TNTEntity.cpp
index 43a0dea09..ad3d9ae0c 100644
--- a/source/Entities/TNTEntity.cpp
+++ b/source/Entities/TNTEntity.cpp
@@ -29,20 +29,6 @@ cTNTEntity::cTNTEntity(const Vector3d & a_Pos, double a_FuseTimeInSec) :
 
 
 
-bool cTNTEntity::Initialize(cWorld * a_World)
-{
-	if (super::Initialize(a_World))
-	{
-		a_World->BroadcastSpawnEntity(*this);
-		return true;
-	}
-	return false;
-}
-
-
-
-
-
 void cTNTEntity::SpawnOn(cClientHandle & a_ClientHandle)
 {
 	a_ClientHandle.SendSpawnObject(*this, 50, 1, 0, 0);  // 50 means TNT
diff --git a/source/Entities/TNTEntity.h b/source/Entities/TNTEntity.h
index ae6fc75e2..eb5040e8a 100644
--- a/source/Entities/TNTEntity.h
+++ b/source/Entities/TNTEntity.h
@@ -19,7 +19,6 @@ public:
 	cTNTEntity(const Vector3d & a_Pos, double a_FuseTimeInSec);
 	
 	// cEntity overrides:
-	virtual bool Initialize(cWorld * a_World) override;
 	virtual void SpawnOn(cClientHandle & a_ClientHandle) override;
 	virtual void Tick(float a_Dt, cChunk & a_Chunk) override;