; NetMsgFrom Example
; ------------------

; Run TWO copies of this program on one machine: the first copy
; hosts "demo game", the second finds it over loopback and joins.
; NetMsgFrom identifies who sent each received message.

SeedRnd MilliSecs()

; Join an existing demo game if one is running, else host one
status=JoinNetGame("demo game","127.0.0.1")
If status=1 Then
    Print "Joined an existing demo game as a client"
Else
    If HostNetGame("demo game")=2 Then status=2
    If status=2 Then Print "No game found - hosting a new demo game"
EndIf

If status=0 Then
    Print "Could not host or join a network game."
Else
    ; A player must exist before messages can be sent or received
    me=CreateNetPlayer("Player"+Rand(100,999))
    Print "Playing as '"+NetPlayerName$(me)+"' (id "+me+")"

    ; Broadcast a greeting for the other copy to receive
    SendNetMsg 1,"Hello from "+NetPlayerName$(me),me,0,1

    Print "Listening for messages for 6 seconds..."
    start=MilliSecs()
    heard=0
    While MilliSecs()-start<6000
        If RecvNetMsg() Then
            mtype=NetMsgType()
            If mtype>=1 And mtype<=99 Then
                heard=heard+1
                ; NetMsgFrom returns the sender's player id -
                ; NetPlayerName$ turns it back into a name
                sender=NetMsgFrom()
                Print "Message '"+NetMsgData$()+"'"
                Print "    NetMsgFrom = "+sender+" ('"+NetPlayerName$(sender)+"')"
                If mtype=1 Then SendNetMsg 2,"Reply!",me,sender,1
            EndIf
        EndIf
        Delay 10
    Wend
    If heard=0 Then
        Print "No messages arrived - a program only hears OTHER copies."
        Print "Start a second copy of this example to see the senders."
    EndIf

    StopNetGame
    Print "Left the game"
EndIf

Print ""
Print "Press any key to close the example"
WaitKey

End