Merge pull request #50 from ravenscroftj/feature/drowning

Made player drowning implementation

source/Player.cpp

@@ -40,6 +40,8 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName)
 	, m_IP("")
 	, m_LastBlockActionTime( 0 )
 	, m_LastBlockActionCnt( 0 )
+	, m_AirLevel( MAX_AIR_LEVEL )
+	, m_AirTickTimer( DROWNING_TICKS )
 	, m_bVisible( true )
 	, m_LastGroundHeight( 0 )
 	, m_bTouchGround( false )
@@ -178,6 +180,10 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 	}
 	
 	super::Tick(a_Dt, a_Chunk);
+
+	//handle air drowning stuff
+	HandleAir(a_Chunk);
+
 	if (m_bDirtyPosition)
 	{
 		// Apply food exhaustion from movement:
@@ -1200,7 +1206,7 @@ bool cPlayer::LoadFromDisk()
 	}
 
 	m_Health = root.get("health", 0).asInt();
-	
+	m_AirLevel            = root.get("air",            MAX_AIR_LEVEL).asInt();
 	m_FoodLevel           = root.get("food",           MAX_FOOD_LEVEL).asInt();
 	m_FoodSaturationLevel = root.get("foodSaturation", MAX_FOOD_LEVEL).asDouble();
 	m_FoodTickTimer       = root.get("foodTickTimer",  0).asInt();
@@ -1246,6 +1252,7 @@ bool cPlayer::SaveToDisk()
 	root["rotation"]       = JSON_PlayerRotation;
 	root["inventory"]      = JSON_Inventory;
 	root["health"]         = m_Health;
+	root["air"]            = m_AirLevel;
 	root["food"]           = m_FoodLevel;
 	root["foodSaturation"] = m_FoodSaturationLevel;
 	root["foodTickTimer"]  = m_FoodTickTimer;
@@ -1313,7 +1320,42 @@ void cPlayer::UseEquippedItem()
 }
 
 
+void cPlayer::HandleAir(cChunk & a_Chunk)
+{
+	// Ref.: http://www.minecraftwiki.net/wiki/Chunk_format
+	// see if the player is /submerged/ water (block above is water)
+	// Get the type of block the player's standing in:
+	BLOCKTYPE BlockIn;
+	int RelX = (int)floor(m_LastPosX) - a_Chunk.GetPosX() * cChunkDef::Width;
+	int RelY = (int)floor(m_LastPosY + 1.1);
+	int RelZ = (int)floor(m_LastPosZ) - a_Chunk.GetPosZ() * cChunkDef::Width;
+	// Use Unbounded, because we're being called *after* processing super::Tick(), which could have changed our chunk
+	VERIFY(a_Chunk.UnboundedRelGetBlockType(RelX, RelY, RelZ, BlockIn));
 
+	if (IsBlockWater(BlockIn))
+	{
+		// either reduce air level or damage player
+		if(m_AirLevel < 1)
+		{
+			if(m_AirTickTimer < 1)
+			{
+				// damage player 
+				TakeDamage(dtDrowning, NULL, 1, 1, 0);
+				// reset timer
+				m_AirTickTimer = DROWNING_TICKS;
+			}else{
+				m_AirTickTimer -= 1;
+			}
+		}else{
+			// reduce air supply
+			m_AirLevel -= 1;
+		}
+	}else{
+		// set the air back to maximum
+		m_AirLevel = MAX_AIR_LEVEL;
+		m_AirTickTimer = DROWNING_TICKS;
+	}
+}
 
 
 void cPlayer::HandleFood(void)

source/Player.h

@@ -29,6 +29,8 @@ public:
 		MAX_HEALTH = 20,
 		MAX_FOOD_LEVEL = 20,
 		EATING_TICKS = 30,  ///< Number of ticks it takes to eat an item
+		MAX_AIR_LEVEL = 300,
+		DROWNING_TICKS = 10, //number of ticks per heart of damage
 	} ;
 	// tolua_end
 	
@@ -161,6 +163,8 @@ public:
 	double GetFoodExhaustionLevel       (void) const { return m_FoodExhaustionLevel; }
 	int    GetFoodPoisonedTicksRemaining(void) const { return m_FoodPoisonedTicksRemaining; }
 
+        int GetAirLevel                     (void) const { return m_AirLevel; }
+	
 	/// Returns true if the player is satiated, i. e. their foodlevel is at the max and they cannot eat anymore
 	bool IsSatiated(void) const { return (m_FoodLevel >= MAX_FOOD_LEVEL); }
 	
@@ -267,6 +271,11 @@ protected:
 	std::string m_PlayerName;
 	std::string m_LoadedWorldName;
 
+	/// Player's air level (for swimming)
+	int m_AirLevel;
+	/// used to time ticks between damage taken via drowning/suffocation
+	int m_AirTickTimer;
+
 	bool m_bVisible;
 
 	// Food-related variables:
@@ -329,7 +338,6 @@ protected:
 	/// The world tick in which eating will be finished. -1 if not eating
 	Int64 m_EatingFinishTick;
 
-
 	virtual void Destroyed(void);
 
 	/// Filters out damage for creative mode
@@ -338,6 +346,9 @@ protected:
 	/// Called in each tick to handle food-related processing
 	void HandleFood(void);
 	
+	/// Called in each tick to handle air-related processing i.e. drowning
+	void HandleAir(cChunk & a_Chunk);
+
 	/// Adds food exhaustion based on the difference between Pos and LastPos, sprinting status and swimming (in water block)
 	void ApplyFoodExhaustionFromMovement(cChunk & a_Chunk);
 } ; // tolua_export