179 lines
4.7 KiB
Python
179 lines
4.7 KiB
Python
# importing libraries
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import pygame
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import time
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import random
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snake_speed = 15
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# Window size
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window_x = 720
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window_y = 480
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# defining colors
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black = pygame.Color(0, 0, 0)
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white = pygame.Color(255, 255, 255)
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red = pygame.Color(255, 0, 0)
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green = pygame.Color(0, 255, 0)
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blue = pygame.Color(0, 0, 255)
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# Initialising pygame
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pygame.init()
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# Initialise game window
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pygame.display.set_caption('GeeksforGeeks Snakes')
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game_window = pygame.display.set_mode((window_x, window_y))
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# FPS (frames per second) controller
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fps = pygame.time.Clock()
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# defining snake default position
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snake_position = [100, 50]
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# defining first 4 blocks of snake body
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snake_body = [[100, 50],
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[90, 50],
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[80, 50],
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[70, 50]
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]
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# fruit position
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fruit_position = [random.randrange(1, (window_x//10)) * 10,
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random.randrange(1, (window_y//10)) * 10]
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fruit_spawn = True
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# setting default snake direction towards
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# right
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direction = 'RIGHT'
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change_to = direction
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# initial score
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score = 0
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# displaying Score function
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def show_score(choice, color, font, size):
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# creating font object score_font
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score_font = pygame.font.SysFont(font, size)
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# create the display surface object
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# score_surface
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score_surface = score_font.render('Score : ' + str(score), True, color)
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# create a rectangular object for the text
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# surface object
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score_rect = score_surface.get_rect()
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# displaying text
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game_window.blit(score_surface, score_rect)
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# game over function
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def game_over():
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# creating font object my_font
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my_font = pygame.font.SysFont('times new roman', 50)
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# creating a text surface on which text
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# will be drawn
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game_over_surface = my_font.render(
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'Your Score is : ' + str(score), True, red)
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# create a rectangular object for the text
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# surface object
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game_over_rect = game_over_surface.get_rect()
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# setting position of the text
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game_over_rect.midtop = (window_x/2, window_y/4)
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# blit will draw the text on screen
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game_window.blit(game_over_surface, game_over_rect)
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pygame.display.flip()
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# after 2 seconds we will quit the program
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time.sleep(2)
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# deactivating pygame library
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pygame.quit()
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# quit the program
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quit()
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# Main Function
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while True:
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# handling key events
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for event in pygame.event.get():
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if event.type == pygame.KEYDOWN:
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if event.key == pygame.K_UP:
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change_to = 'UP'
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if event.key == pygame.K_DOWN:
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change_to = 'DOWN'
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if event.key == pygame.K_LEFT:
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change_to = 'LEFT'
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if event.key == pygame.K_RIGHT:
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change_to = 'RIGHT'
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# If two keys pressed simultaneously
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# we don't want snake to move into two
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# directions simultaneously
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if change_to == 'UP' and direction != 'DOWN':
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direction = 'UP'
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if change_to == 'DOWN' and direction != 'UP':
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direction = 'DOWN'
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if change_to == 'LEFT' and direction != 'RIGHT':
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direction = 'LEFT'
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if change_to == 'RIGHT' and direction != 'LEFT':
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direction = 'RIGHT'
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# Moving the snake
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if direction == 'UP':
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snake_position[1] -= 10
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if direction == 'DOWN':
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snake_position[1] += 10
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if direction == 'LEFT':
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snake_position[0] -= 10
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if direction == 'RIGHT':
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snake_position[0] += 10
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# Snake body growing mechanism
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# if fruits and snakes collide then scores
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# will be incremented by 10
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snake_body.insert(0, list(snake_position))
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if snake_position[0] == fruit_position[0] and snake_position[1] == fruit_position[1]:
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score += 10
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fruit_spawn = False
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else:
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snake_body.pop()
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if not fruit_spawn:
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fruit_position = [random.randrange(1, (window_x//10)) * 10,
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random.randrange(1, (window_y//10)) * 10]
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fruit_spawn = True
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game_window.fill(black)
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for pos in snake_body:
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pygame.draw.rect(game_window, green,
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pygame.Rect(pos[0], pos[1], 10, 10))
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pygame.draw.rect(game_window, white, pygame.Rect(
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fruit_position[0], fruit_position[1], 10, 10))
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# Game Over conditions
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if snake_position[0] < 0 or snake_position[0] > window_x-10:
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game_over()
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if snake_position[1] < 0 or snake_position[1] > window_y-10:
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game_over()
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# Touching the snake body
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for block in snake_body[1:]:
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if snake_position[0] == block[0] and snake_position[1] == block[1]:
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game_over()
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# displaying score continuously
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show_score(1, white, 'times new roman', 20)
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# Refresh game screen
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pygame.display.update()
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# Frame Per Second /Refresh Rate
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fps.tick(snake_speed)
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