Implemented SteerVehicle packet.

source/ClientHandle.cpp

@@ -1090,6 +1090,15 @@ void cClientHandle::HandleSlotSelected(short a_SlotNum)
 
 
 
+void cClientHandle::HandleSteerVehicle(float a_Forward, float a_Sideways)
+{
+	m_Player->SteerVehicle(a_Forward, a_Sideways);
+}
+
+
+
+
+
 void cClientHandle::HandleWindowClose(char a_WindowID)
 {
 	m_Player->CloseWindowIfID(a_WindowID);

source/ClientHandle.h

@@ -177,6 +177,7 @@ public:
 	void HandleRespawn          (void);
 	void HandleRightClick       (int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ, const cItem & a_HeldItem);
 	void HandleSlotSelected     (short a_SlotNum);
+	void HandleSteerVehicle     (float Forward, float Sideways);
 	void HandleTabCompletion    (const AString & a_Text);
 	void HandleUpdateSign       (
 		int a_BlockX, int a_BlockY, int a_BlockZ, 

source/Entities/Entity.cpp

@@ -546,6 +546,8 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 		}
 		else
 		{
+			// TODO: This condition belongs to minecarts, without it, they derails too much.
+			// But it shouldn't be here for other entities. We need a complete minecart physics overhaul.
 			if (
 				(BlockBelow != E_BLOCK_RAIL) &&
 				(BlockBelow != E_BLOCK_DETECTOR_RAIL) &&
@@ -556,12 +558,12 @@ void cEntity::HandlePhysics(float a_Dt, cChunk & a_Chunk)
 				// Friction
 				if (NextSpeed.SqrLength() > 0.0004f)
 				{
-					NextSpeed.x *= 0.7f / (1 + a_Dt);
+					NextSpeed.x *= 0.6666;
 					if (fabs(NextSpeed.x) < 0.05)
 					{
 						NextSpeed.x = 0;
 					}
-					NextSpeed.z *= 0.7f / (1 + a_Dt);
+					NextSpeed.z *= 0.6666;
 					if (fabs(NextSpeed.z) < 0.05)
 					{
 						NextSpeed.z = 0;
@@ -1225,6 +1227,25 @@ void cEntity::AddSpeedZ(double a_AddSpeedZ)
 
 
 
+void cEntity::SteerVehicle(float a_Forward, float a_Sideways)
+{
+	if (m_AttachedTo == NULL)
+	{
+		return;
+	}
+	if ((a_Forward != 0) || (a_Sideways != 0))
+	{
+		Vector3d LookVector = GetLookVector();
+		double AddSpeedX = LookVector.x * a_Forward + LookVector.z * a_Sideways;
+		double AddSpeedZ = LookVector.z * a_Forward - LookVector.x * a_Sideways;
+		m_AttachedTo->AddSpeed(AddSpeedX, 0, AddSpeedZ);
+	}
+}
+
+
+
+
+
 //////////////////////////////////////////////////////////////////////////
 // Get look vector (this is NOT a rotation!)
 Vector3d cEntity::GetLookVector(void) const

source/Entities/Entity.h

@@ -186,6 +186,8 @@ public:
 	void AddSpeedY  (double a_AddSpeedY);
 	void AddSpeedZ  (double a_AddSpeedZ);
 	
+	void SteerVehicle(float a_Forward, float a_Sideways);
+
 	inline int  GetUniqueID(void) const { return m_UniqueID; }
 	inline bool IsDestroyed(void) const { return !m_IsInitialized; }
 

source/Protocol/Protocol16x.cpp

@@ -213,6 +213,10 @@ int cProtocol161::ParseSteerVehicle(void)
 	{
 		m_Client->HandleUnmount();
 	}
+	else
+	{
+		m_Client->HandleSteerVehicle(Forward, Sideways);
+	}
 	return PARSE_OK;
 }