4 files changed, 56 insertions, 20 deletions

diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index 3e046f38d..286c17513 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -342,7 +342,16 @@ void cClientHandle::Authenticate(const AString & a_Name, const AString & a_UUID,
 	}
 
 	// Send time
-	m_Protocol->SendTimeUpdate(World->GetWorldAge(), World->GetTimeOfDay());
+	Int64 TimeOfDay = World->GetTimeOfDay();
+	if (!World->IsDaylightCycleEnabled())
+	{
+		TimeOfDay *= -1;
+		if (TimeOfDay == 0)
+		{
+			TimeOfDay = -1;
+		}
+	}
+	m_Protocol->SendTimeUpdate(World->GetWorldAge(), TimeOfDay);
 
 	// Send contents of the inventory window
 	m_Protocol->SendWholeInventory(*m_Player->GetWindow());
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index ee1db3155..1bf397ad2 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -179,7 +179,7 @@ public:
 	void SendTabCompletionResults(const AStringVector & a_Results);
 	void SendTeleportEntity      (const cEntity & a_Entity);
 	void SendThunderbolt         (int a_BlockX, int a_BlockY, int a_BlockZ);
-	void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay);
+	void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay);  // tolua_export
 	void SendUnloadChunk         (int a_ChunkX, int a_ChunkZ);
 	void SendUpdateBlockEntity   (cBlockEntity & a_BlockEntity);
 	void SendUpdateSign          (int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4);
diff --git a/src/World.cpp b/src/World.cpp
index d2213d1e5..ab46e886c 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -243,6 +243,7 @@ cWorld::cWorld(const AString & a_WorldName, eDimension a_Dimension, const AStrin
 #endif
 	m_Dimension(a_Dimension),
 	m_IsSpawnExplicitlySet(false),
+	m_CycleDaylight(true),
 	m_WorldAgeSecs(0),
 	m_TimeOfDaySecs(0),
 	m_WorldAge(0),
@@ -827,28 +828,32 @@ void cWorld::Tick(float a_Dt, int a_LastTickDurationMSec)
 	{
 		SetChunkData(**itr);
 	}  // for itr - SetChunkDataQueue[]
-	
-	// We need sub-tick precision here, that's why we store the time in seconds and calculate ticks off of it
+
 	m_WorldAgeSecs  += (double)a_Dt / 1000.0;
-	m_TimeOfDaySecs += (double)a_Dt / 1000.0;
+	m_WorldAge  = (Int64)(m_WorldAgeSecs  * 20.0);
 
-	// Wrap time of day each 20 minutes (1200 seconds)
-	if (m_TimeOfDaySecs > 1200.0)
+	if (m_CycleDaylight)
 	{
-		m_TimeOfDaySecs -= 1200.0;
-	}
+		// We need sub-tick precision here, that's why we store the time in seconds and calculate ticks off of it
+		m_TimeOfDaySecs += (double)a_Dt / 1000.0;
 
-	m_WorldAge  = (Int64)(m_WorldAgeSecs  * 20.0);
-	m_TimeOfDay = (Int64)(m_TimeOfDaySecs * 20.0);
+		// Wrap time of day each 20 minutes (1200 seconds)
+		if (m_TimeOfDaySecs > 1200.0)
+		{
+			m_TimeOfDaySecs -= 1200.0;
+		}
 
-	// Updates the sky darkness based on current time of day
-	UpdateSkyDarkness();
+		m_TimeOfDay = (Int64)(m_TimeOfDaySecs * 20.0);
 
-	// Broadcast time update every 40 ticks (2 seconds)
-	if (m_LastTimeUpdate < m_WorldAge - 40)
-	{
-		BroadcastTimeUpdate();
-		m_LastTimeUpdate = m_WorldAge;
+		// Updates the sky darkness based on current time of day
+		UpdateSkyDarkness();
+
+		// Broadcast time update every 40 ticks (2 seconds)
+		if (m_LastTimeUpdate < m_WorldAge - 40)
+		{
+			BroadcastTimeUpdate();
+			m_LastTimeUpdate = m_WorldAge;
+		}
 	}
 
 	// Add entities waiting in the queue to be added:
@@ -2243,6 +2248,16 @@ void cWorld::BroadcastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ, cons
 
 void cWorld::BroadcastTimeUpdate(const cClientHandle * a_Exclude)
 {
+	int TimeOfDay = m_TimeOfDay;
+	if (!m_CycleDaylight)
+	{
+		TimeOfDay *= -1;
+		if (TimeOfDay == 0)
+		{
+			TimeOfDay = -1;
+		}
+	}
+
 	cCSLock Lock(m_CSPlayers);
 	for (cPlayerList::iterator itr = m_Players.begin(); itr != m_Players.end(); ++itr)
 	{
@@ -2251,7 +2266,7 @@ void cWorld::BroadcastTimeUpdate(const cClientHandle * a_Exclude)
 		{
 			continue;
 		}
-		ch->SendTimeUpdate(m_WorldAge, m_TimeOfDay);
+		ch->SendTimeUpdate(m_WorldAge, TimeOfDay);
 	}
 }
 
diff --git a/src/World.h b/src/World.h
index 90b798e8e..4e85087fc 100644
--- a/src/World.h
+++ b/src/World.h
@@ -145,7 +145,17 @@ public:
 	// tolua_begin
 
 	int GetTicksUntilWeatherChange(void) const { return m_WeatherInterval; }
-	
+
+	/** Is the daylight cyclus enabled? */
+	virtual bool IsDaylightCycleEnabled(void) const { return m_CycleDaylight; }
+
+	/** Sets the daylight cyclus to true/false. */
+	virtual void SetDoDaylightCycle(bool a_CycleDaylight)
+	{
+		m_CycleDaylight = a_CycleDaylight;
+		BroadcastTimeUpdate();
+	}
+
 	virtual Int64 GetWorldAge (void) const override { return m_WorldAge; }
 	virtual Int64 GetTimeOfDay(void) const override { return m_TimeOfDay; }
 	
@@ -158,6 +168,7 @@ public:
 	{
 		m_TimeOfDay = a_TimeOfDay;
 		m_TimeOfDaySecs = (double)a_TimeOfDay / 20.0;
+		UpdateSkyDarkness();
 		BroadcastTimeUpdate();
 	}
 	
@@ -868,6 +879,7 @@ private:
 	bool m_BroadcastDeathMessages;
 	bool m_BroadcastAchievementMessages;
 
+	bool   m_CycleDaylight;     // Is the daylight cyclus enabled?
 	double m_WorldAgeSecs;      // World age, in seconds. Is only incremented, cannot be set by plugins.
 	double m_TimeOfDaySecs;     // Time of day in seconds. Can be adjusted. Is wrapped to zero each day.
 	Int64  m_WorldAge;          // World age in ticks, calculated off of m_WorldAgeSecs