change from single followable item to multiple

Server/Plugins/APIDump/APIDesc.lua

@@ -1550,6 +1550,8 @@ end
 					{ Params = "Index, ItemType, ItemCount, ItemDamage", Return = "", Notes = "Sets the item at the specified index to the specified item" },
 				},
 				Size = { Params = "", Return = "number", Notes = "Returns the number of items in the collection" },
+				Contains = { Params = "{{cItem|cItem}}", Return = "bool", Notes = "Returns true if the collection contains an item that is fully equivalent to the parameter" },
+				ContainsType = { Params = "{{cItem|cItem}}", Return = "bool", Notes = "Returns true if the collection contains an item that is the same type as the parameter" },
 			},
 		},  -- cItems
 

src/Item.cpp

@@ -459,3 +459,33 @@ void cItems::Set(int a_Idx, short a_ItemType, char a_ItemCount, short a_ItemDama
 
 
 
+
+bool cItems::Contains(const cItem & a_Item)
+{
+	for (auto itr : *this)
+	{
+		if (a_Item.IsEqual(itr))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+
+
+bool cItems::ContainsType(const cItem & a_Item)
+{
+	for (auto itr : *this)
+	{
+		if (a_Item.IsSameType(itr))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+

src/Item.h

@@ -239,6 +239,8 @@ public:
 	void    Clear (void) {clear(); }
 	size_t  Size  (void) const { return size(); }
 	void    Set   (int a_Idx, short a_ItemType, char a_ItemCount, short a_ItemDamage);
+	bool    Contains(const cItem & a_Item);
+	bool    ContainsType(const cItem & a_Item);
 
 	void    Add   (short a_ItemType, char a_ItemCount, short a_ItemDamage)
 	{

src/Mobs/Chicken.h

@@ -19,7 +19,10 @@ public:
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
 
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_SEEDS); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_SEEDS);
+	}
 
 	virtual void HandleFalling(void) override;
 

src/Mobs/Cow.h

@@ -20,7 +20,10 @@ public:
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_WHEAT); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_WHEAT);
+	}
 
 } ;
 

src/Mobs/Mooshroom.h

@@ -20,7 +20,10 @@ public:
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_WHEAT); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_WHEAT);
+	}
 } ;
 
 

src/Mobs/PassiveMonster.cpp

@@ -43,15 +43,17 @@ void cPassiveMonster::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 	{
 		CheckEventLostPlayer();
 	}
-	cItem FollowedItem = GetFollowedItem();
+	cItems FollowedItems;
-	if (FollowedItem.IsEmpty())
+	GetFollowedItems(FollowedItems);
+	if (FollowedItems.Size() <= 0)
 	{
 		return;
 	}
 	cPlayer * a_Closest_Player = m_World->FindClosestPlayer(GetPosition(), static_cast<float>(m_SightDistance));
 	if (a_Closest_Player != nullptr)
 	{
-		if (a_Closest_Player->GetEquippedItem().IsEqual(FollowedItem))
+		cItem EquippedItem = a_Closest_Player->GetEquippedItem();
+		if (FollowedItems.ContainsType(EquippedItem))
 		{
 			Vector3d PlayerPos = a_Closest_Player->GetPosition();
 			MoveToPosition(PlayerPos);

src/Mobs/PassiveMonster.h

@@ -20,9 +20,8 @@ public:
 	/** When hit by someone, run away */
 	virtual bool DoTakeDamage(TakeDamageInfo & a_TDI) override;
 
-	/** Returns the item that the animal of this class follows when a player holds it in hand
+	/** Returns the items that the animal of this class follows when a player holds it in hand. */
-	Return an empty item not to follow (default). */
+	virtual void GetFollowedItems(cItems & a_Items) { }
-	virtual const cItem GetFollowedItem(void) const { return cItem(); }
 
 } ;
 

src/Mobs/Pig.h

@@ -24,7 +24,10 @@ public:
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
 
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_CARROT); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_CARROT);
+	}
 
 	bool IsSaddled(void) const { return m_bIsSaddled; }
 

src/Mobs/Rabbit.h

@@ -34,7 +34,12 @@ public:
 	CLASS_PROTODEF(cRabbit)
 
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_CARROT); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_CARROT);
+		a_Items.Add(E_ITEM_GOLDEN_CARROT);
+		a_Items.Add(E_BLOCK_DANDELION);
+	}
 
 	eRabbitType GetRabbitType()         const { return m_Type; }
 	UInt8       GetRabbitTypeAsNumber() const { return static_cast<UInt8>(GetRabbitType()); }

src/Mobs/Sheep.h

@@ -26,7 +26,10 @@ public:
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
 
-	virtual const cItem GetFollowedItem(void) const override { return cItem(E_ITEM_WHEAT); }
+	virtual void GetFollowedItems(cItems & a_Items) override
+	{
+		a_Items.Add(E_ITEM_WHEAT);
+	}
 
 	/** Generates a random color for the sheep like the vanilla server.
 	The percent's where used are from the wiki: http://minecraft.gamepedia.com/Sheep#Breeding */