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type = value 1-99
data$ = string containing message to send from = player ID of the sender to = player ID of the recipient (0=broadcast) reliable = flag for sending message reliably |
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First off, this ONLY works when you have joined a network game via StartNetGame or JoinNetGame and you have created a player via CreateNetPlayer (you must create a player, even if it is just to lurk).
This is probably the most complicated of the networking commands. This what you use to actually send a message to one or all of the players on the network game. The other players will use RecvNetMsg() to intercept your message. The TYPE parameter is a number from 1 to 99. These values are denoted as 'user messages'. The Data$ parameter is the actual string that contains the message you want to send. Helpful to know that in order to keep traffic low, you will want to combine details of a message into a single message instead of sending multiple messages with a single element. For example, you might want to send X, Y, and FRAME in a single string like "200,100,4" and parse it out at the recipient's end. FROM is the player's ID that is sending the message. This is the value returned from the CreateNetPlayer() command. TO is the player's ID you wish to send the message to. A default value of 0 will broadcast to ALL players. The RELIABLE flag will put a priority on the message and it will ensure there is no packet loss in the delivery. However, it is at least 3 times slower than a regular non-reliable message. The example requires that you run it on the local machine while the remote computer runs the example in the RecvNetMsg() command. |
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; SendNetMsg example
; ------------------ ; Run this example on the local computer ; run the example for RecvNetMsg() on a remote computer ; Graphics mode with double buffering Graphics 640,480,16 SetBuffer BackBuffer() ; Create a network game with NO requester joinStatus=HostNetGame("ShaneGame") ; A type to hold all the player's information Type multi Field x Field y Field id Field name$ Field xspeed Field boxColor End Type ; make sure the game started ok... If joinStatus=2 Then Print "Hosted game started... " Else Print "Hosted game could not be started!" End End If ; Create 5 local players using TYPEs For t = 1 To 5 ; New type instance player.multi = New Multi ; Assign the ID field with the created player ID and name him playerID=CreateNetPlayer("Player" + t) ; if the player was created ok ... assign some random parameters If playerID <> 0 Then player ame$="Player" + t playerx = Rand(640) playery = Rand(480) playeroxColor = Rand(255) playerxspeed = Rand(1,5) ; Print some text results Print "Player " + t + " has joined the game with ID=" + playerID Else Print "The player couldn't join! Aborting!" End If Next ; We've got them all! Wait for a key Print "All local players are joined! Press a key ..." WaitKey() ; Loop this routine While Not KeyHit(1) Cls ; for each of the players, update their locations on the screen For player = Each multi Color playeroxColor,playeroxColor,playeroxColor Rect playerx,playery,10,10,1 Text playerx-10,playery-15,player ame$ playerx = playerx + playerxspeed If playerx > 640 Or playerx < 0 Then playerxspeed=-playerxspeed message$="Player ID #" + playerID + " hit a wall!" ; Send a broadcast message if a player rebounds off the wall ; this message will show up on the remote machine SendNetMsg Rand(1,99),message$,playerid,0 End If Next Flip Wend End |