Ramakrushna Mohapatra

Posted on Sep 6, 2020 • Updated on Aug 9, 2022

A Simple Python Tic-Tac-Toe Game Using Pygame

#python #pygame #tictactoe

Hello Dev world! This blog is about to create a simple and cool game which we were playing from our childhood. the best game we played as a 90's kid during school time.Yes you heard it right! its TIC TAC TOE game. I am going to show you how you can build in Python. But, moving far let me give you the definition of the Tic Tac Toe Game.

Definition of Tic Tac Toe Game:

It is a traditional strategy game where two players look for different turns to complete a row, a column, or a diagonal with either three O’s or three X’s drawn in the spaces of a grid of nine squares. The squares contain different noughts and crosses. It is typically a paper-and-pencil game but now programmed like a computer game. The player whoever first completes placing three of their marks in a horizontal, vertical, or diagonal row in a square wins.

As we got to know about this, lets go to the first step of making this game:

REQUIREMENTS FOR THE GAME:

A good & fast processing PC with a Python environment & pygame package installed. You can choose Mac Book, Asus Zenbook, Dell Inspiron, or any Pc with a high processor.
Code Ide or Code Editor.(I used Pycharm editor. Its fully depends on you)
A notebook for writing important notation.
Your Focus.

HOW THE GAME WORKS:

Our Tic Tac Toe is programmed in other to allow two users or players to play the game in the same time.
It is GUI game & gives an instant alert when players wins or losses or draw the game.

STEPS REQUIRED TO MAKE THIS AWESOME GAME LIVE:

First of all, create a folder named any in your PC & drag it to your code editor.
Secondly, open your command prompt(CMD) & install the Pygame package by typing pip install pygame command.(I used windows10 OS)
Thirdly, make a file called TicTacToeGame.py & folders called image. It will you to store all your codes & image resource files needed for the game.
Set your codes which are given below to your respective files. And about the images i used in that code, depends on you. just download your convenience images for X and O and put it inside the image folder. and give the path correctly under:

**X_IMAGE = pygame.transform.scale(pygame.image.load("**Images/x.png**"), (150, 150))

O_IMAGE = pygame.transform.scale(pygame.image.load("**Images/o.png**"),(150, 150))**

Lastly just run this code and enjoy the game.

CODE

I have mentioned comments before every new code addes to this project. Hope it will help for the new dev guys who is trying to built this game.

TicTacToeGame.py

import pygame
import math
# Initializing Pygame
pygame.init()

# Screen
WIDTH = 500
ROWS = 3
win = pygame.display.set_mode((WIDTH, WIDTH))
pygame.display.set_caption("TicTacToe")

# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
GRAY = (200, 200, 200)
RED = (255, 0, 0)
BLUE = (0, 0, 255)

# Images
X_IMAGE = pygame.transform.scale(pygame.image.load("Images/x.png"), (150, 150))
O_IMAGE = pygame.transform.scale(pygame.image.load("Images/o.png"), (150, 150))

# Fonts
END_FONT = pygame.font.SysFont('courier', 40)


def draw_grid():
    gap = WIDTH // ROWS

    # Starting points
    x = 0
    y = 0

    for i in range(ROWS):
        x = i * gap

        pygame.draw.line(win, GRAY, (x, 0), (x, WIDTH), 3)
        pygame.draw.line(win, GRAY, (0, x), (WIDTH, x), 3)


def initialize_grid():
    dis_to_cen = WIDTH // ROWS // 2

    # Initializing the array
    game_array = [[None, None, None], [None, None, None], [None, None, None]]

    for i in range(len(game_array)):
        for j in range(len(game_array[i])):
            x = dis_to_cen * (2 * j + 1)
            y = dis_to_cen * (2 * i + 1)

            # Adding centre coordinates
            game_array[i][j] = (x, y, "", True)

    return game_array


def click(game_array):
    global x_turn, o_turn, images

    # Mouse position
    m_x, m_y = pygame.mouse.get_pos()

    for i in range(len(game_array)):
        for j in range(len(game_array[i])):
            x, y, char, can_play = game_array[i][j]

            # Distance between mouse and the centre of the square
            dis = math.sqrt((x - m_x) ** 2 + (y - m_y) ** 2)

            # If it's inside the square
            if dis < WIDTH // ROWS // 2 and can_play:
                if x_turn:  # If it's X's turn
                    images.append((x, y, X_IMAGE))
                    x_turn = False
                    o_turn = True
                    game_array[i][j] = (x, y, 'x', False)

                elif o_turn:  # If it's O's turn
                    images.append((x, y, O_IMAGE))
                    x_turn = True
                    o_turn = False
                    game_array[i][j] = (x, y, 'o', False)


# Checking if someone has won
def has_won(game_array):
    # Checking rows
    for row in range(len(game_array)):
        if (game_array[0][2] == game_array[1][2] == game_array[2][2]) and game_array[0][2] != "":
            display_message(game_array[0][2].upper() + " has won!")
            return True

    # Checking columns
    for col in range(len(game_array)):
        if (game_array[0][2] == game_array[1][2] == game_array[2][2]) and game_array[0][2] != "":
            display_message(game_array[0][2].upper() + " has won!")
            return True

    # Checking main diagonal
    if (game_array[0][0][2] == game_array[1][1][2] == game_array[2][2][2]) and game_array[0][0][2] != "":
        display_message(game_array[0][0][2].upper() + " has won!")
        return True

    # Checking reverse diagonal
    if (game_array[0][2][2] == game_array[1][1][2] == game_array[2][0][2]) and game_array[0][2][2] != "":
        display_message(game_array[0][2][2].upper() + " has won!")
        return True

    return False


def has_drawn(game_array):
    for i in range(len(game_array)):
        for j in range(len(game_array[i])):
            if game_array[i][j][2] == "":
                return False

    display_message("It's a draw!")
    return True


def display_message(content):
    pygame.time.delay(500)
    win.fill(WHITE)
    end_text = END_FONT.render(content, 1, BLACK)
    win.blit(end_text, ((WIDTH - end_text.get_width()) // 2, (WIDTH - end_text.get_height()) // 2))
    pygame.display.update()
    pygame.time.delay(3000)


def render():
    win.fill(WHITE)
    draw_grid()

    # Drawing X's and O's
    for image in images:
        x, y, IMAGE = image
        win.blit(IMAGE, (x - IMAGE.get_width() // 2, y - IMAGE.get_height() // 2))

    pygame.display.update()


def main():
    global x_turn, o_turn, images, draw

    images = []
    draw = False

    run = True

    x_turn = True
    o_turn = False

    game_array = initialize_grid()

    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                click(game_array)

        render()

        if has_won(game_array) or has_drawn(game_array):
            run = False


while True:
    if __name__ == '__main__':
        main()

FINAL STATEMENT:

It is simple beginner friendly Tic-Tac-Toe Game which is easy for any beginners to built & understand. You can also download this code from my github page directly. Hope this will help you to build this game and enjoy this game with you hoomies or with your friends. Let's connect and built together a great dev enovironment.

Cheers! Happy coding

Top comments (5)

Abdur-Rahmaan Janhangeer • Dec 1 '20

Put python after the 3 backsticks so that your code is syntax-highlighted.

print(1)

Else have a look at this lib. You think it make PyGame programming easier? Thanks

Timur Berezhnoy • May 26 '22 • Edited

Checking rows and columns doesn't work, so I changed some lines a little bit. It works properly now.

# Checking rows
for row in range(0,3):
    if (game_array[row][0][2] == game_array[row][1][2] == game_array[row][2][2]) and game_array[row][0][2] != "":
        display_message(game_array[row][0][2].upper() + " has won!")
        return True

# Checking columns
for col in range(0, 3):
    if (game_array[0][col][2] == game_array[1][col][2] == game_array[2][col][2]) and game_array[0][col][2] != "":
        display_message(game_array[0][col][2].upper() + " has won!")
        return True

Ramakrushna Mohapatra • Aug 9 '22

Worked for me. may be version issue. Thanks for your comment.

Hairash • Feb 28 '21

Hello! Thanks for code!
I have noticed one moment there:
You have constant ROWS = 3, and it's value can be changed.
And at the same time you create game array:

game_array = [[None, None, None], [None, None, None], [None, None, None]]

that means you have 3x3 field.
I think, it's better to replace this line with:

game_array = [[None] * ROWS for _ in range(ROWS)]

So it will work for every field size.

Ramakrushna Mohapatra • Jul 28 '22

Yeah, For generic purpose its better to use your mentioned line. Thanks.

DEV Community

A Simple Python Tic-Tac-Toe Game Using Pygame

REQUIREMENTS FOR THE GAME:

HOW THE GAME WORKS:

STEPS REQUIRED TO MAKE THIS AWESOME GAME LIVE:

CODE

FINAL STATEMENT:

Top comments (5)

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