From 0eb519b35add5b8ac9553ed4716430fbd26b660e Mon Sep 17 00:00:00 2001
From: Gargaj <gargaj@conspiracy.hu>
Date: Sat, 12 Dec 2015 20:55:58 +0100
Subject: sheep color inheritance

---
 src/Mobs/PassiveMonster.cpp | 21 ++++++++++++++++++++-
 src/Mobs/PassiveMonster.h   |  3 +++
 src/Mobs/Sheep.cpp          | 40 ++++++++++++++++++++++++++++++++++++++++
 src/Mobs/Sheep.h            |  1 +
 4 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/src/Mobs/PassiveMonster.cpp b/src/Mobs/PassiveMonster.cpp
index b700c0c5d..30b46500d 100644
--- a/src/Mobs/PassiveMonster.cpp
+++ b/src/Mobs/PassiveMonster.cpp
@@ -92,7 +92,26 @@ void cPassiveMonster::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 		{
 			// Mating finished. Spawn baby
 			Vector3f Pos = (GetPosition() + m_LovePartner->GetPosition()) * 0.5;
-			m_World->SpawnMob(Pos.x, Pos.y, Pos.z, GetMobType(), true);
+			UInt32 BabyID = m_World->SpawnMob(Pos.x, Pos.y, Pos.z, GetMobType(), true);
+
+			class cBabyInheritCallback :
+				public cEntityCallback
+			{
+			public:
+				cPassiveMonster * Baby;
+				cBabyInheritCallback() : Baby(nullptr) { }
+				virtual bool Item(cEntity * a_Entity) override
+				{
+					Baby = static_cast<cPassiveMonster *>(a_Entity);
+					return true;
+				}
+			} Callback;
+
+			m_World->DoWithEntityByID(BabyID, Callback);
+			if (Callback.Baby != nullptr)
+			{
+				Callback.Baby->InheritFromParents(this, m_LovePartner);
+			}
 
 			cFastRandom Random;
 			m_World->SpawnExperienceOrb(Pos.x, Pos.y, Pos.z, 1 + Random.NextInt(6));
diff --git a/src/Mobs/PassiveMonster.h b/src/Mobs/PassiveMonster.h
index 0e9250e6c..1106ffb91 100644
--- a/src/Mobs/PassiveMonster.h
+++ b/src/Mobs/PassiveMonster.h
@@ -27,6 +27,9 @@ public:
 	/** Returns the items that make the animal breed - this is usually the same as the ones that make the animal follow, but not necessarily. */
 	virtual void GetBreedingItems(cItems & a_Items) { GetFollowedItems(a_Items); }
 
+	/** Called after the baby is born, allows the baby to inherit the parents' properties (color, etc.) */
+	virtual void InheritFromParents(cPassiveMonster * a_Parent1, cPassiveMonster * a_Parent2) { }
+
 	/** Returns the partner which the monster is currently mating with. */
 	cPassiveMonster * GetPartner(void) const { return m_LovePartner; }
 
diff --git a/src/Mobs/Sheep.cpp b/src/Mobs/Sheep.cpp
index 5f763508b..7bca03e7e 100644
--- a/src/Mobs/Sheep.cpp
+++ b/src/Mobs/Sheep.cpp
@@ -131,6 +131,46 @@ void cSheep::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 
 
 
+void cSheep::InheritFromParents(cPassiveMonster * a_Parent1, cPassiveMonster * a_Parent2)
+{
+	static const struct
+	{
+		short Parent1, Parent2, Child;
+	} ColorInheritance[] =
+	{
+		{ E_META_WOOL_BLUE,   E_META_WOOL_RED,   E_META_WOOL_PURPLE     },
+		{ E_META_WOOL_BLUE,   E_META_WOOL_GREEN, E_META_WOOL_CYAN       },
+		{ E_META_WOOL_YELLOW, E_META_WOOL_RED,   E_META_WOOL_ORANGE     },
+		{ E_META_WOOL_GREEN,  E_META_WOOL_WHITE, E_META_WOOL_LIGHTGREEN },
+		{ E_META_WOOL_RED,    E_META_WOOL_WHITE, E_META_WOOL_PINK       },
+		{ E_META_WOOL_WHITE,  E_META_WOOL_BLACK, E_META_WOOL_GRAY       },
+		{ E_META_WOOL_PURPLE, E_META_WOOL_PINK,  E_META_WOOL_MAGENTA    },
+		{ E_META_WOOL_WHITE,  E_META_WOOL_GRAY,  E_META_WOOL_LIGHTGRAY  },
+		{ E_META_WOOL_BLUE,   E_META_WOOL_WHITE, E_META_WOOL_LIGHTBLUE  },
+	};
+	cSheep * Parent1 = static_cast<cSheep *>(a_Parent1);
+	cSheep * Parent2 = static_cast<cSheep *>(a_Parent2);
+	for (size_t i = 0; i < ARRAYCOUNT(ColorInheritance); i++)
+	{
+		if (
+			((Parent1->GetFurColor() == ColorInheritance[i].Parent1) && (Parent2->GetFurColor() == ColorInheritance[i].Parent2)) ||
+			((Parent1->GetFurColor() == ColorInheritance[i].Parent2) && (Parent2->GetFurColor() == ColorInheritance[i].Parent1))
+		)
+		{
+			SetFurColor(ColorInheritance[i].Child);
+			m_World->BroadcastEntityMetadata(*this);
+			return;
+		}
+	}
+	cFastRandom Random;
+	SetFurColor((Random.NextInt(100) < 50) ? Parent1->GetFurColor() : Parent2->GetFurColor());
+	m_World->BroadcastEntityMetadata(*this);
+}
+
+
+
+
+
 NIBBLETYPE cSheep::GenerateNaturalRandomColor(void)
 {
 	cFastRandom Random;
diff --git a/src/Mobs/Sheep.h b/src/Mobs/Sheep.h
index ff7632eb7..97f481bec 100644
--- a/src/Mobs/Sheep.h
+++ b/src/Mobs/Sheep.h
@@ -25,6 +25,7 @@ public:
 	virtual void GetDrops(cItems & a_Drops, cEntity * a_Killer = nullptr) override;
 	virtual void OnRightClicked(cPlayer & a_Player) override;
 	virtual void Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk) override;
+	virtual void InheritFromParents(cPassiveMonster * a_Parent1, cPassiveMonster * a_Parent2) override;
 
 	virtual void GetFollowedItems(cItems & a_Items) override
 	{
-- 
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