1 files changed, 12 insertions, 2 deletions

diff --git a/src/BlockEntities/CommandBlockEntity.cpp b/src/BlockEntities/CommandBlockEntity.cpp
index ca617b04d..7e9015d33 100644
--- a/src/BlockEntities/CommandBlockEntity.cpp
+++ b/src/BlockEntities/CommandBlockEntity.cpp
@@ -7,6 +7,7 @@
 #include "json/json.h"
 #include "CommandBlockEntity.h"
 #include "../Entities/Player.h"
+#include "../WorldStorage/FastNBT.h"
 
 #include "../CommandOutput.h"
 #include "../Root.h"
@@ -40,6 +41,15 @@ void cCommandBlockEntity::UsedBy(cPlayer * a_Player)
 void cCommandBlockEntity::SetCommand(const AString & a_Cmd)
 {
 	m_Command = a_Cmd;
+
+	/*
+	Vanilla requires that the server send a Block Entity Update after a command has been set
+	Therefore, command blocks don't support on-the-fly (when window is open) updating of a command and therefore...
+	...the following code can't be put in UsedBy just before the window opens
+
+	Just documenting my experience in getting this to work :P
+	*/
+	m_World->BroadcastBlockEntity(GetPosX(), GetPosY(), GetPosZ());
 }
 
 
@@ -48,6 +58,7 @@ void cCommandBlockEntity::SetCommand(const AString & a_Cmd)
 
 void cCommandBlockEntity::SetLastOutput(const AString & a_LastOut)
 {
+	m_World->BroadcastBlockEntity(GetPosX(), GetPosY(), GetPosZ());
 	m_LastOutput = a_LastOut;
 }
 
@@ -131,8 +142,7 @@ bool cCommandBlockEntity::Tick(float a_Dt, cChunk & a_Chunk)
 
 void cCommandBlockEntity::SendTo(cClientHandle & a_Client)
 {
-	// Nothing needs to be sent
-	UNUSED(a_Client);
+	a_Client.SendUpdateBlockEntity(*this);
 }