From d622267515c69d553267f362a68aedfd956cbc5b Mon Sep 17 00:00:00 2001
From: madmaxoft <github@xoft.cz>
Date: Thu, 22 Aug 2013 22:31:15 +0200
Subject: [PATCH] Added a few basic fields to cProjectileEntity and
 cArrowEntity.

---
 source/Entities/ProjectileEntity.cpp | 30 +++++++++++++++++-
 source/Entities/ProjectileEntity.h   | 47 ++++++++++++++++++++++++++--
 2 files changed, 73 insertions(+), 4 deletions(-)

diff --git a/source/Entities/ProjectileEntity.cpp b/source/Entities/ProjectileEntity.cpp
index c6c5ecc71..e87f72eed 100644
--- a/source/Entities/ProjectileEntity.cpp
+++ b/source/Entities/ProjectileEntity.cpp
@@ -16,6 +16,7 @@
 
 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)
 {
 }
@@ -26,6 +27,7 @@ cProjectileEntity::cProjectileEntity(eKind a_Kind, cEntity * a_Creator, double a
 
 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)
 {
 	SetSpeed(a_Speed);
@@ -57,13 +59,39 @@ cProjectileEntity * cProjectileEntity::Create(eKind a_Kind, cEntity * a_Creator,
 
 
 
+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 "";
+}
+
+
+
+
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // 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)
+	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);
 }
 
 
diff --git a/source/Entities/ProjectileEntity.h b/source/Entities/ProjectileEntity.h
index 426b2ea84..8c6791e2e 100644
--- a/source/Entities/ProjectileEntity.h
+++ b/source/Entities/ProjectileEntity.h
@@ -29,8 +29,8 @@ public:
 		pkArrow         = 60,
 		pkSnowball      = 61,
 		pkEgg           = 62,
-		pkGhastFireball = 63,  // TODO: Unverified TypeID, check this in ProtoProxy
-		pkFireCharge    = 64,  // TODO: Unverified TypeID, check this in ProtoProxy
+		pkGhastFireball = 63,
+		pkFireCharge    = 64,
 		pkEnderPearl    = 65,
 		pkExpBottle     = 75,
 		pkSplashPotion  = 73,
@@ -50,14 +50,26 @@ public:
 	
 	// 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_Kind;
+	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;
 } ;
 
 
@@ -70,13 +82,42 @@ class cArrowEntity :
 	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
 	
+	/// 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);
 	
+	/// 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;
+	
 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;
+
 	// cEntity overrides:
 	virtual void SpawnOn(cClientHandle & a_Client) override;