connectfour.py

import numpy as np
import pygame
import sys
import math

#Defining colors for board
BLUE = (0, 0, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
YELLOW = (255, 255, 0)

ROW_COUNT = 6
COLUMN_COUNT = 7

def create_board():
    board = np.zeros((ROW_COUNT,COLUMN_COUNT))
    return board

def drop_piece(board, row, col, piece):
    board[row][col] = piece

def is_valid_location(board, col):
    return board[ROW_COUNT-1][col] == 0
    

def get_next_open_row(board, col):
    for r in range(ROW_COUNT):
        if board[r][col] == 0:
            return r
# creating a new function for the board because
#the numbers were starting to print at the top of the row, this flips board
def print_board(board):
    print(np.flip(board, 0))

def winning_move(board, piece):
    #Check horizontal locations for win
    for c in range(COLUMN_COUNT-3):
        for r in range(ROW_COUNT):
            if board[r][c] == piece and board[r][c+1] == piece and board[r][c+2] == piece and board[r][c+3] == piece:
                return True
    # Check vertical locations for win
    for c in range(COLUMN_COUNT):
        for r in range(ROW_COUNT-3):
            if board[r][c] == piece and board[r+1][c] == piece and board[r+2][c] == piece and board[r+3][c] == piece:
                return True
    # Check positively sloped diagonal
    for c in range(COLUMN_COUNT-3):
        for r in range(ROW_COUNT-3):
            if board[r][c] == piece and board[r+1][c+1] == piece and board[r+2][c+2] == piece and board[r+3][c+3] == piece:
                return True
                
    #Check for negative sloped diagonal
    for c in range(COLUMN_COUNT-3):
        for r in range(3, ROW_COUNT):
            if board[r][c] == piece and board[r-1][c+1] == piece and board[r-2][c+2] == piece and board[r-3][c+3] == piece:
                return True
            
def draw_board(board):
    for c in range(COLUMN_COUNT):
        for r in range(ROW_COUNT):
            pygame.draw.rect(screen, BLUE, (c*SQUARESIZE, r*SQUARESIZE+SQUARESIZE, SQUARESIZE, SQUARESIZE))
            pygame.draw.circle(screen, BLACK, (int(c*SQUARESIZE+SQUARESIZE/2), int(r*SQUARESIZE+SQUARESIZE+SQUARESIZE/2)), RADIUS)
            

    for c in range(COLUMN_COUNT):
        for r in range(ROW_COUNT):
            if board[r][c] == 1:
                pygame.draw.circle(screen, RED, (int(c*SQUARESIZE+SQUARESIZE/2), height-int(r*SQUARESIZE+SQUARESIZE/2)), RADIUS)
            elif board[r][c] == 2:
                pygame.draw.circle(screen, YELLOW, (int(c*SQUARESIZE+SQUARESIZE/2), height-int(r*SQUARESIZE+SQUARESIZE/2)), RADIUS)

        pygame.display.update
                
            
    pygame.display.update()

board = create_board()
print_board(board)
game_over = False
turn = 0

pygame.init()

SQUARESIZE = 100 

width = COLUMN_COUNT * SQUARESIZE
height = (ROW_COUNT+1) * SQUARESIZE

size = (width, height)

RADIUS = int(SQUARESIZE/2 - 5)

screen = pygame.display.set_mode(size)
draw_board(board)
pygame.display.update()

myfont = pygame.font.SysFont("monospace", 75)
 
while not game_over:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        
        if event.type == pygame.MOUSEMOTION:
            pygame.draw.rect(screen, BLACK, (0,0, width, SQUARESIZE))
            posx = event.pos[0]
            if turn == 0:
                pygame.draw.circle(screen, RED, (posx, int(SQUARESIZE/2)), RADIUS)
            else:
                pygame.draw.circle(screen, YELLOW, (posx, int(SQUARESIZE/2)), RADIUS)
        pygame.display.update()

 
 
        if event.type == pygame.MOUSEBUTTONDOWN: 
             
            if turn == 0:
                posx = event.pos[0]
                col = int(math.floor(posx/SQUARESIZE))
                

                if is_valid_location(board,col):
                    row = get_next_open_row(board,col)
                    drop_piece(board, row, col, 1)
            
                    if winning_move(board,1):
                        #label = myfont.render("Player 1 wins!!", 1, RED)
                        #screen.blit(label, (40,10))
                        game_over = True
                        break

    # Ask for Player 2 Input
            else:
                posx = event.pos[0]
                col = int(math.floor(posx/SQUARESIZE))

                if is_valid_location(board, col):
                    row = get_next_open_row(board,col)
                    drop_piece(board, row, col, 2)

                    if winning_move(board,2):
                        #label = myfont.render("Player wins!!", 2, YELLOW)
                        #screen.blit(label, (40,10))
                        game_over = True
                        break
                
            
            draw_board(board)

            turn +=1 
            turn = turn % 2

            if game_over:
                pygame.time.wait(3000)
# Modulus here with turn is used to alternate player turns, takes the remainder and divides by two