WorldViz User Forum - Generic UDP or TCP/IP function

Hi,

The networking feature built-in to Vizard uses UDP, but the data is "pickled" before it is sent. This makes it difficult to communicate with non-Python programs, which I assume is what you are doing. If you want to receive raw data over a socket then you can use the Python socket library. Here is some sample code:

Code:

import viz

viz.go()



import socket



#The maximum amount of data to receive at a time

MAX_DATA_SIZE = 1024



#The port to send/receive data on

PORT = 4999



#Get the name of this computer

COMPUTER_NAME = socket.gethostname()



#Get the IP address of this computer

COMPUTER_IP_ADDRESS = socket.gethostbyname('localhost')



#Create a socket to send data over

OutSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

OutSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)



#Create a socket to receive data from

InSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

InSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

InSocket.bind(('', PORT))

InSocket.setblocking(0)



def SendData(data):

        OutSocket.sendto(data,(COMPUTER_IP_ADDRESS,PORT))

        

def ReceiveData():

        try:

                return InSocket.recv(MAX_DATA_SIZE)

        except socket.error:

                #Insert error handling code here

                pass



vizact.onkeydown(' ',SendData,'hello there')



def CheckSocket():

        #Try to receive data from socket

        data = ReceiveData()

        if data:

                print 'Received Message:',data

vizact.ontimer(0,CheckSocket)