Scratch

Doesn't MMO stand for Massivly Multiplayer Online? If it does we should start calling the game MMOG for Massivly Multiplayer Online Game. XD

Last edited by Magnie (2009-04-04 10:01:35)

Someone make it so I can get Adobe AIR!! Like make it so I can choose where to install it. Please! 

EDIT: I looked into Adobe AIR (I still can't install it) but it says you can have online application on your computer. I thought could you make it so Snyff can be an online application? Then you don''t need to download anything but the game/scratch project.

Last edited by Magnie (2009-04-06 14:41:15)

Well it like said that "Keep your favorite browser games on your computer"....

Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you! Thank you!

EDIT: It requires AIR.... 

Last edited by Magnie (2009-04-07 16:44:54)

Admins = My Parents 
My Mom says I have to talk to my Dad. So I guess I'll try that. 
But please keep trying thank you. 

This may be off topic. My Dad says that Flash is not in his interests so he won't install that so I might not be able to get AIR. 
Could you explain the second solution? Thanks! 

Actually I put Scratch on my desktop. 

Sounds cool, but why is this on Sensor Boards? 

Yea. I was wondering the same thing. I think it should be in Advanced Topics. 

I agree that Snyff is probably the most advanced Scratch-related topic I have seen in a long time. How about renaming the "Sensor Boards" forum section into something like "External Devices"? That way it would be open to discussions about all kinds of peripherals interfacing with Scratch, not just the - awsome - Picoboard.

is it possible to make games that support more than two players using snyff?

Hey Chalkmarrow-
I've done a couple of tests with Snyff and 1.4 and I can't seem to get either computer to recognize sensor-updates so neither one can read the others' variables. Broadcasts work fine, though. Everything works great when I use the same setup with 1.3. Have you encountered the same problem?

same as archmage.

fullmoon wrote:

I got 1.4 to receive sensor-updates with the following AS3 class:

Code:

package{
    //Import everything we need to work with flash.net.Socket and handle its events
    import flash.events.Event;
    import flash.events.ProgressEvent;
    import flash.events.IOErrorEvent;
    import flash.utils.ByteArray;
    import flash.net.Socket;
    import flash.net.navigateToURL;
    import flash.net.URLRequest;
    public dynamic class ScratchSocket {

        //Reserve space for socket, but don't declare it
        private var socket:Socket;
        public function ScratchSocket() {
            //Declare socket
            socket=new Socket  ;
            connect();

        }
        private function connect():void {
            //Connect with Scratch on localhost, which responds to port 42001
            socket.connect("localhost",42001);
            socket.addEventListener(Event.CONNECT,socketConnect);
            socket.addEventListener(Event.UNLOAD,socketConnect);
            socket.addEventListener(Event.CLOSE,socketConnect);
            socket.addEventListener(IOErrorEvent.IO_ERROR,socketConnect);
            socket.addEventListener(ProgressEvent.SOCKET_DATA,dataIn);
        }
        public function update(sensor:String,value:String):void {
            //Function to send a sensor update to Scratch
            sendScratchMessage("sensor-update "+sensor+" "+value);
        }
        //Function to send a broadcast to Scratch
        public function broadcast(broadcast:String):void {
            trace("ScratchSocket.broadcast");
            sendScratchMessage('broadcast "'+broadcast+'"');
        }
        private function sendScratchMessage(sendData:String):void {
            //The Scratch Connections protocol requires every message sent to Scratch to
            //be preceded by four bytes indicating the message length
            var bytes:ByteArray=new ByteArray  ;
            //Here are three '0' bytes
            bytes[0]=0;
            bytes[1]=0;
            bytes[2]=0;
            //Here's the actual message length
            bytes[3]=sendData.length;
            //Now we write the preceder plus the actual message to the socket
            for (var i:Number=0; i<4; i++) {
                socket.writeByte(bytes[i]);
            }
            //Here comes the airplane!
            socket.writeMultiByte(sendData,"us-ascii");
            socket.flush();
        }
        private function socketConnect(Event):void {
            //Handle connection events linked in constructor
            switch (Event.type) {
                case 'connect' :
                    trace("connection successful");
                    update("sc.io.connectionReady","true");
                    break;
                case 'close' :
                    trace("connection failed");
                    update("sc.io.connectionReady","false");
                    connect();

                    break;
                case 'ioError' :
                    trace("connection failed through IOError");
                    update("sc.io.connectionReady","false");
                    break;
                case 'unload' :
                    update("sc.io.connectionReady","false");
                    break;

            }
        }
        private function dataIn(event:ProgressEvent):void {
            trace("ScratchSocket.dataIn");
            //Create an empty string
            var inString:String="";
            while (socket.bytesAvailable) {
                //Read the next part of the socket data into inString
                inString+=socket.readUTF();
            }
            //Send inString off to class SCparse for evaluation
            evaluate(inString);
        }
        // Parse the data received from Scratch
        private function evaluate(input:String) {
            trace("ScratchSocket.evaluate("+input+")");
            // Look for broadcast from Scratch
            // Matches any string starting with 'broadcast ' followed by a string of non-return characters in "quotes"
            var pattern1:RegExp=/broadcast\s\"(.*)"/;
            var result:Object=pattern1.exec(input);
            if (result!=null) {
                trace('Scratch broadcasted:'+result[1]);
                if (result[1].charAt(0)=="!") {
                    interpret(result[1].slice(1,result[1].length));
                }
            }
            // Look for sensor-update from Scratch
            // Matches any sensor-update string Scratch sends
            var pattern2:RegExp=/sensor-update\s\"Scratch-(.*)\"\s\"(.*)\"/;
            result=pattern2.exec(input);
            if (result!=null) {
                trace('Scratch changed variable '+result[1]+' to '+result[2]);
                //If the variable changed is 'sc.io.command' then interpret it.
                if (result[1]=="sc.io.command") {
                    interpret(result[2]);
                }
            }
        }
        private function interpret(input:String):void {
            trace("ScatchSocket.interpret("+input+")");
            var command:Array=input.split(" :: ");
            trace(command);
            var returnVal="";
            //If the command returns to an invalid sensor then return to the default sensor, 'sc.io.defaultReturn'.
            if (command[2].slice(0,6)!="sc.io.") {
                command[2]="sc.io.defaultReturn";
            }
            //Find out what the command wants
            switch (command[0]) {
                case "getURL" :
                    trace("sc.getURL");
                    navigateToURL(new URLRequest(command[1]));
                    returnVal="success";
                    update(command[2],returnVal);
                    break;
                case "nospace" :
                    trace("sc.concat");
                    var a:Array=command[1].split(" ");
                    for (var i=0; i<a.length; i++) {
                        if (a[i]=="") {
                            a[i]=" ";
                        }
                    }
                    break;
                case "charcode" :
                    trace("sc.charcode");
                    update(command[2],command[1].charCodeAt(0));
                    break;
                case "store" : 
                    //update(command[0],ScratchStorage.store(command[1]))
                    break;
            }


        }

    }
}

If you're interested in replicating this, you must instantiate a new ScratchSocket and call it's update method:

Code:

var s:ScratchSocket=new ScratchSocket();
s.update(variableName,value)

ehh, what?