├── README.md
└── Snake Game.py


/README.md:
--------------------------------------------------------------------------------
 1 | # Snake Eater
 2 | A snake game written in Python using the Pygame library.
 3 | 
 4 | 
 5 | ## Installing
 6 | Download the Python 3 installer package from the official website and install it, if not installed previously.
 7 | 
 8 | Run the following in the terminal to install the Pygame library
 9 | ```
10 | pip3 install pygame
11 | ```
12 | 
13 | 
14 | ## Running the application
15 | Download the source code from the repository and run the file just as any other Python script (.py) file.
16 | ```
17 | python3 Snake\ Game.py
18 | ```
19 | 
20 | The `difficulty` variable can be changed with the values provided in the comment to set the difficulty level.
21 | 
22 | The rest of the code is properly commented and self explanatory. Tweaks can be made to change the play style or visuals of the game.
23 | 
24 | 
25 | ## Screenshots
26 | 
27 | ![1](https://user-images.githubusercontent.com/32998741/33873439-27f635b2-df45-11e7-8fc1-f7812f17447a.png)
28 | *Written using PyCharm*
29 | 
30 | ![2](https://user-images.githubusercontent.com/32998741/33873437-2780ed2a-df45-11e7-9776-b1f151fa4e02.png)
31 | *Active game screen*
32 | 
33 | ![3](https://user-images.githubusercontent.com/32998741/33873440-28647360-df45-11e7-8291-b82d5646352f.png)
34 | *Game over screen*
35 | 
36 | 
37 | ## Prerequisites
38 | * [Python](https://www.python.org)
39 | * [Pygame](https://www.pygame.org/wiki/GettingStarted), an open source Python library for making multimedia applications
40 | 
41 | 
42 | ## Authors
43 | 
44 | * **Rajat Dipta Biswas** - *Initial work*
45 | 
46 | See also the list of [contributors](https://github.com/rajatdiptabiswas/snake-pygame/graphs/contributors) who participated in this project.
47 | 
48 | ## Acknowledgements
49 | * [Pygame Documentations](https://www.pygame.org/docs/)
50 | * [Udemy: Python Game Development](https://www.udemy.com/python-game-development-creating-a-snake-game-from-scratch/learn/v4/overview)
51 | 


--------------------------------------------------------------------------------
/Snake Game.py:
--------------------------------------------------------------------------------
  1 | """
  2 | Snake Eater
  3 | Made with PyGame
  4 | """
  5 | 
  6 | import pygame, sys, time, random
  7 | 
  8 | 
  9 | # Difficulty settings
 10 | # Easy      ->  10
 11 | # Medium    ->  25
 12 | # Hard      ->  40
 13 | # Harder    ->  60
 14 | # Impossible->  120
 15 | difficulty = 25
 16 | 
 17 | # Window size
 18 | frame_size_x = 720
 19 | frame_size_y = 480
 20 | 
 21 | # Checks for errors encountered
 22 | check_errors = pygame.init()
 23 | # pygame.init() example output -> (6, 0)
 24 | # second number in tuple gives number of errors
 25 | if check_errors[1] > 0:
 26 |     print(f'[!] Had {check_errors[1]} errors when initialising game, exiting...')
 27 |     sys.exit(-1)
 28 | else:
 29 |     print('[+] Game successfully initialised')
 30 | 
 31 | 
 32 | # Initialise game window
 33 | pygame.display.set_caption('Snake Eater')
 34 | game_window = pygame.display.set_mode((frame_size_x, frame_size_y))
 35 | 
 36 | 
 37 | # Colors (R, G, B)
 38 | black = pygame.Color(0, 0, 0)
 39 | white = pygame.Color(255, 255, 255)
 40 | red = pygame.Color(255, 0, 0)
 41 | green = pygame.Color(0, 255, 0)
 42 | blue = pygame.Color(0, 0, 255)
 43 | 
 44 | 
 45 | # FPS (frames per second) controller
 46 | fps_controller = pygame.time.Clock()
 47 | 
 48 | 
 49 | # Game variables
 50 | snake_pos = [100, 50]
 51 | snake_body = [[100, 50], [100-10, 50], [100-(2*10), 50]]
 52 | 
 53 | food_pos = [random.randrange(1, (frame_size_x//10)) * 10, random.randrange(1, (frame_size_y//10)) * 10]
 54 | food_spawn = True
 55 | 
 56 | direction = 'RIGHT'
 57 | change_to = direction
 58 | 
 59 | score = 0
 60 | 
 61 | 
 62 | # Game Over
 63 | def game_over():
 64 |     my_font = pygame.font.SysFont('times new roman', 90)
 65 |     game_over_surface = my_font.render('YOU DIED', True, red)
 66 |     game_over_rect = game_over_surface.get_rect()
 67 |     game_over_rect.midtop = (frame_size_x/2, frame_size_y/4)
 68 |     game_window.fill(black)
 69 |     game_window.blit(game_over_surface, game_over_rect)
 70 |     show_score(0, red, 'times', 20)
 71 |     pygame.display.flip()
 72 |     time.sleep(3)
 73 |     pygame.quit()
 74 |     sys.exit()
 75 | 
 76 | 
 77 | # Score
 78 | def show_score(choice, color, font, size):
 79 |     score_font = pygame.font.SysFont(font, size)
 80 |     score_surface = score_font.render('Score : ' + str(score), True, color)
 81 |     score_rect = score_surface.get_rect()
 82 |     if choice == 1:
 83 |         score_rect.midtop = (frame_size_x/10, 15)
 84 |     else:
 85 |         score_rect.midtop = (frame_size_x/2, frame_size_y/1.25)
 86 |     game_window.blit(score_surface, score_rect)
 87 |     # pygame.display.flip()
 88 | 
 89 | 
 90 | # Main logic
 91 | while True:
 92 |     for event in pygame.event.get():
 93 |         if event.type == pygame.QUIT:
 94 |             pygame.quit()
 95 |             sys.exit()
 96 |         # Whenever a key is pressed down
 97 |         elif event.type == pygame.KEYDOWN:
 98 |             # W -> Up; S -> Down; A -> Left; D -> Right
 99 |             if event.key == pygame.K_UP or event.key == ord('w'):
100 |                 change_to = 'UP'
101 |             if event.key == pygame.K_DOWN or event.key == ord('s'):
102 |                 change_to = 'DOWN'
103 |             if event.key == pygame.K_LEFT or event.key == ord('a'):
104 |                 change_to = 'LEFT'
105 |             if event.key == pygame.K_RIGHT or event.key == ord('d'):
106 |                 change_to = 'RIGHT'
107 |             # Esc -> Create event to quit the game
108 |             if event.key == pygame.K_ESCAPE:
109 |                 pygame.event.post(pygame.event.Event(pygame.QUIT))
110 | 
111 |     # Making sure the snake cannot move in the opposite direction instantaneously
112 |     if change_to == 'UP' and direction != 'DOWN':
113 |         direction = 'UP'
114 |     if change_to == 'DOWN' and direction != 'UP':
115 |         direction = 'DOWN'
116 |     if change_to == 'LEFT' and direction != 'RIGHT':
117 |         direction = 'LEFT'
118 |     if change_to == 'RIGHT' and direction != 'LEFT':
119 |         direction = 'RIGHT'
120 | 
121 |     # Moving the snake
122 |     if direction == 'UP':
123 |         snake_pos[1] -= 10
124 |     if direction == 'DOWN':
125 |         snake_pos[1] += 10
126 |     if direction == 'LEFT':
127 |         snake_pos[0] -= 10
128 |     if direction == 'RIGHT':
129 |         snake_pos[0] += 10
130 | 
131 |     # Snake body growing mechanism
132 |     snake_body.insert(0, list(snake_pos))
133 |     if snake_pos[0] == food_pos[0] and snake_pos[1] == food_pos[1]:
134 |         score += 1
135 |         food_spawn = False
136 |     else:
137 |         snake_body.pop()
138 | 
139 |     # Spawning food on the screen
140 |     if not food_spawn:
141 |         food_pos = [random.randrange(1, (frame_size_x//10)) * 10, random.randrange(1, (frame_size_y//10)) * 10]
142 |     food_spawn = True
143 | 
144 |     # GFX
145 |     game_window.fill(black)
146 |     for pos in snake_body:
147 |         # Snake body
148 |         # .draw.rect(play_surface, color, xy-coordinate)
149 |         # xy-coordinate -> .Rect(x, y, size_x, size_y)
150 |         pygame.draw.rect(game_window, green, pygame.Rect(pos[0], pos[1], 10, 10))
151 | 
152 |     # Snake food
153 |     pygame.draw.rect(game_window, white, pygame.Rect(food_pos[0], food_pos[1], 10, 10))
154 | 
155 |     # Game Over conditions
156 |     # Getting out of bounds
157 |     if snake_pos[0] < 0 or snake_pos[0] > frame_size_x-10:
158 |         game_over()
159 |     if snake_pos[1] < 0 or snake_pos[1] > frame_size_y-10:
160 |         game_over()
161 |     # Touching the snake body
162 |     for block in snake_body[1:]:
163 |         if snake_pos[0] == block[0] and snake_pos[1] == block[1]:
164 |             game_over()
165 | 
166 |     show_score(1, white, 'consolas', 20)
167 |     # Refresh game screen
168 |     pygame.display.update()
169 |     # Refresh rate
170 |     fps_controller.tick(difficulty)


--------------------------------------------------------------------------------