; SendNetMsg Example
; ------------------

; Run TWO copies of this program on one machine: the first copy
; hosts "demo game", the second finds it over loopback and joins.
; The copies then greet each other with SendNetMsg.

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)+"'"

    ; SendNetMsg type,data$,from,to,reliable
    ;   type 1-99 = your own message kinds (here 1 = greeting)
    ;   to 0      = broadcast to every player in the game
    ;   reliable  = 1 guarantees delivery
    SendNetMsg 1,"Hello from "+NetPlayerName$(me),me,0,1
    Print "Broadcast a greeting with SendNetMsg"

    ; Listen for the other copy for 6 seconds
    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
                Print "Received '"+NetMsgData$()+"' from "+NetPlayerName$(NetMsgFrom())
                ; Answer greetings directly to their sender
                If mtype=1 Then SendNetMsg 2,"Nice to meet you!",me,NetMsgFrom(),1
            EndIf
            If mtype=100 Then Print NetPlayerName$(NetMsgFrom())+" joined the game"
        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 exchange."
    EndIf

    StopNetGame
    Print "Left the game"
EndIf

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

End