16. Python Game Development in Hindi - Eating Apple Logic

Code :

import pygame

import time

import random

pygame.init()

game_width = 800

game_height = 600

white = (255,255,255)

black = (0,0,0)

red = (255,0,0)

green = (0,255,0)

blue = (0,0,255)

gameWindow = pygame.display.set_mode((game_width,game_height))

pygame.display.set_caption('Snake Game')

pygame.display.update()

block = 20

FPS = 13

clk = pygame.time.Clock()

font = pygame.font.SysFont(None,30)

def message_to_screen(msg,color):

    screen_text = font.render(msg,True,color)

    gameWindow.blit(screen_text,[game_width/4,game_height/2])

background_image = pygame.image.load("background.jpg").convert()

def loop():

    gameClose = False

    gameOver = False

    rAppleX = round(random.randrange(0,game_width-block)/20.0)*20.0

    rAppleY = round(random.randrange(0,game_height-block)/20.0)*20.0

    start_x = game_width / 2

    start_y = game_height / 2

    update_x = 0

    update_y = 0

    while not gameClose:

        while gameOver == True:

            gameWindow.fill(white)

            message_to_screen("You loose!!!, Press 'r' to Replay or Press 'q' to Quit", red)

            pygame.display.update()

            for event in pygame.event.get():

                if event.type == pygame.KEYDOWN:

                    if event.key == pygame.K_q:

                        gameClose = True

                        gameOver = False

                    if event.key == pygame.K_r:

                        loop()

        for event in pygame.event.get():

            if event.type == pygame.QUIT:

                gameClose = True

            if event.type == pygame.KEYDOWN:

                if event.key == pygame.K_LEFT:

                    update_x = -block

                    update_y = 0

                if event.key == pygame.K_RIGHT:

                    update_x = +block

                    update_y = 0

                if event.key == pygame.K_UP:

                    update_y = -block

                    update_x = 0

                if event.key == pygame.K_DOWN:

                    update_y = +block

                    update_x = 0

        if start_x >= game_width or start_x < 0 or start_y >= game_height or start_y < 0:

            gameOver = True

        start_x += update_x

        start_y += update_y

        gameWindow.blit(background_image,[0,0])

        pygame.draw.rect(gameWindow, green, [rAppleX, rAppleY, block, block])

        pygame.draw.rect(gameWindow,blue,[start_x,start_y,block,block])

        pygame.display.update()

        if start_x == rAppleX and start_y == rAppleY:

            rAppleX = round(random.randrange(0, game_width - block) / 20.0) * 20.0

            rAppleY = round(random.randrange(0, game_height - block) / 20.0) * 20.0

        clk.tick(FPS)

    pygame.quit()

    quit()

loop()

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