feat(TU31): Creepers can be ignited with flint and steel (#84)

* TU31 feature: Creepers can be ignited with flint and steel

* make mobInteract more accurate to decomp

---------

Co-authored-by: piebot <274605694+pieeebot@users.noreply.github.com>

Minecraft.World/Creeper.cpp

@@ -26,6 +26,7 @@ void Creeper::_init()
 	oldSwell = 0;
 	maxSwell = 30;
 	explosionRadius = 3;
+	ignited = false;
 }
 
 Creeper::Creeper(Level *level) : Monster( level )
@@ -190,3 +191,38 @@ void Creeper::thunderHit(const LightningBolt *lightningBolt)
 	Monster::thunderHit(lightningBolt);
 	entityData->set(DATA_IS_POWERED, static_cast<byte>(1));
 }
+
+void Creeper::Ignite()
+{
+	setSwellDir(1);
+	ignited = true;
+}
+
+bool Creeper::isIgnited()
+{
+	return ignited;
+}
+
+bool Creeper::mobInteract(shared_ptr<Player> player)
+{
+	shared_ptr<ItemInstance> item = player->inventory->getSelected();
+
+	if (item == nullptr || item->id != Item::flintAndSteel_Id)
+		return Mob::mobInteract(player);
+
+	playSound(eSoundType_FIRE_NEWIGNITE, 1, random->nextFloat() * 0.4f + 0.8f);
+	player->swing();
+
+	if (!level->isClientSide)
+	{
+		if (!isIgnited())
+		{
+			Ignite();
+			item->hurtAndBreak(1, player);
+			return true;
+		}
+		return Mob::mobInteract(player);
+	}
+
+	return true;
+}

Minecraft.World/Creeper.h

@@ -21,6 +21,8 @@ private:
 	int maxSwell;
 	int explosionRadius;
 
+	bool ignited;
+
 	void _init();
 
 public:
@@ -34,6 +36,8 @@ public:
 
 	virtual int getMaxFallDistance();
 
+	virtual bool mobInteract(shared_ptr<Player> player);
+
 protected:
 	virtual void causeFallDamage(float distance);
 	virtual void defineSynchedData();
@@ -61,5 +65,9 @@ protected:
 public:
 	int getSwellDir();
 	void setSwellDir(int dir);
-	void thunderHit(const LightningBolt *lightningBolt) ;
+	void thunderHit(const LightningBolt *lightningBolt);
+
+public:
+	void Ignite();
+	bool isIgnited();
 };

Minecraft.World/SwellGoal.cpp

@@ -32,6 +32,12 @@ void SwellGoal::stop()
 
 void SwellGoal::tick()
 {
+	if(creeper->isIgnited())
+	{ 
+		creeper->setSwellDir(1);
+		return;
+	}
+
 	if (target.lock() == nullptr)
 	{
 		creeper->setSwellDir(-1);