Sending Objects

Sending Objects

In this python online game tutorial I will be showing how we can send objects over our network. In the last video we sent string data containing the position of each of our clients. This worked... but it is not very scale-able. Being able to send actual objects is a much better and more scale-bale solution and is what we will be doing here.

client.py

import pygame
from network import Network
from player import Player

width = 500
height = 500
win = pygame.display.set_mode((width, height))
pygame.display.set_caption("Client")


def redrawWindow(win,player, player2):
    win.fill((255,255,255))
    player.draw(win)
    player2.draw(win)
    pygame.display.update()


def main():
    run = True
    n = Network()
    p = n.getP()
    clock = pygame.time.Clock()

    while run:
        clock.tick(60)
        p2 = n.send(p)

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                pygame.quit()

        p.move()
        redrawWindow(win, p, p2)

main()

network.py

import socket
import pickle


class Network:
    def __init__(self):
        self.client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server = "10.11.250.207"
        self.port = 5555
        self.addr = (self.server, self.port)
        self.p = self.connect()

    def getP(self):
        return self.p

    def connect(self):
        try:
            self.client.connect(self.addr)
            return pickle.loads(self.client.recv(2048))
        except:
            pass

    def send(self, data):
        try:
            self.client.send(pickle.dumps(data))
            return pickle.loads(self.client.recv(2048))
        except socket.error as e:
            print(e)

player.py

import pygame

class Player():
    def __init__(self, x, y, width, height, color):
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.color = color
        self.rect = (x,y,width,height)
        self.vel = 3

    def draw(self, win):
        pygame.draw.rect(win, self.color, self.rect)

    def move(self):
        keys = pygame.key.get_pressed()

        if keys[pygame.K_LEFT]:
            self.x -= self.vel

        if keys[pygame.K_RIGHT]:
            self.x += self.vel

        if keys[pygame.K_UP]:
            self.y -= self.vel

        if keys[pygame.K_DOWN]:
            self.y += self.vel

        self.update()

    def update(self):
        self.rect = (self.x, self.y, self.width, self.height)

server.py

import socket
from _thread import *
from player import Player
import pickle

server = "10.11.250.207"
port = 5555

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
    s.bind((server, port))
except socket.error as e:
    str(e)

s.listen(2)
print("Waiting for a connection, Server Started")


players = [Player(0,0,50,50,(255,0,0)), Player(100,100, 50,50, (0,0,255))]

def threaded_client(conn, player):
    conn.send(pickle.dumps(players[player]))
    reply = ""
    while True:
        try:
            data = pickle.loads(conn.recv(2048))
            players[player] = data

            if not data:
                print("Disconnected")
                break
            else:
                if player == 1:
                    reply = players[0]
                else:
                    reply = players[1]

                print("Received: ", data)
                print("Sending : ", reply)

            conn.sendall(pickle.dumps(reply))
        except:
            break

    print("Lost connection")
    conn.close()

currentPlayer = 0
while True:
    conn, addr = s.accept()
    print("Connected to:", addr)

    start_new_thread(threaded_client, (conn, currentPlayer))
    currentPlayer += 1