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Merge pull request #8 from terminal-based-games/release/v0.1
Release/v0.1
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| # Contributing to OpenOuroboros | ||
| # Contributing to Ouroboros | ||
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| Thank you for taking the time to contribute! :tada: | ||
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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env python3 | ||
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| import curses | ||
| from curses import KEY_RIGHT, KEY_LEFT, KEY_UP, KEY_DOWN | ||
| from random import randint, choice | ||
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| class Apple: | ||
| """Responsible for an apple's location on the game board.""" | ||
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| def __init__(self): | ||
| """Initializes the Apple class.""" | ||
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| def get_apple(self, snake): | ||
| """Returns random coordinates representing an apple's placement on the game board. These coordinates will not overlap with the snake coordinates.""" | ||
| apple = [] | ||
| width = Board.width - 2 | ||
| height = Board.height - 2 | ||
| while apple == []: | ||
| apple = [randint(1, height), randint(1, width)] | ||
| # If apple coordinates are in snake's coordinates, start over | ||
| if apple in snake: | ||
| apple = [] | ||
| return apple | ||
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| class Snake: | ||
| """Responsible for handling the snake moving on the game board.""" | ||
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| def __init__(self): | ||
| """Initializes the Snake class.""" | ||
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| def get_snake(self): | ||
| """Returns random coordinates representing a snake's placement on the game board.""" | ||
| width = Board.width - 2 | ||
| height = Board.height - 2 | ||
| snake = [[randint(1, height), randint(1, width)]] | ||
| return snake | ||
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| def move_across_edges(self, snake): | ||
| """Enables snake to move across the edges of the game's window.""" | ||
| # Snake will enter opposite side of screen if it moves across the edge | ||
| # Moves through top edge | ||
| if snake[0][0] == 0: | ||
| snake[0][0] = Board.height - 2 | ||
| # Moves through left edge | ||
| if snake[0][1] == 0: | ||
| snake[0][1] = Board.width - 2 | ||
| # Moves through bottom edge | ||
| if snake[0][0] == (Board.height - 1): | ||
| snake[0][0] = 1 | ||
| # Moves through right edge | ||
| if snake[0][1] == (Board.width - 1): | ||
| snake[0][1] = 1 | ||
| return snake | ||
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| def move(self, snake, key, window): | ||
| """Calculates the new coordinates of the snake on the game board.""" | ||
| snake.insert( | ||
| 0, | ||
| [ | ||
| snake[0][0] + (key == KEY_DOWN and 1) + (key == KEY_UP and -1), | ||
| snake[0][1] + (key == KEY_LEFT and -1) + (key == KEY_RIGHT and 1), | ||
| ], | ||
| ) | ||
| return snake | ||
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| def run_over_self(self, snake): | ||
| """If snake runs over itself, the game is over.""" | ||
| if snake[0] in snake[1:]: | ||
| return True | ||
| else: | ||
| return False | ||
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| class Board: | ||
| """Responsible for game board (terminal window) setup.""" | ||
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| def __init__(self, height, width, begin_y, begin_x): | ||
| """Initializes the Board class.""" | ||
| Board.height = height | ||
| Board.width = width | ||
| self.begin_y = begin_y | ||
| self.begin_x = begin_x | ||
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| def initial_setup(self): | ||
| """Initializes curses and window (game board) settings.""" | ||
| # Set up curses | ||
| curses.initscr() # Initialize curses | ||
| curses.start_color() # Initialize color | ||
| curses.use_default_colors() # Allow default color values | ||
| # Change definition of color pair | ||
| curses.init_pair(1, curses.COLOR_GREEN, curses.COLOR_BLACK) | ||
| curses.init_pair(2, curses.COLOR_RED, curses.COLOR_BLACK) | ||
| curses.noecho() # Turn off automatic echoing of keys to the screen | ||
| curses.cbreak() # Enable application to react to keys instantly | ||
| curses.curs_set(0) # Disable cursor | ||
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| # Initialize a new window | ||
| window = curses.newwin( | ||
| self.height, self.width, self.begin_y, self.begin_x | ||
| ) # Return a new window | ||
| window.keypad(1) # Keypad will be interpreted by curses | ||
| window.nodelay(1) # getch() will be non-blocking | ||
| window.border(0) # Default border | ||
| window.timeout(220) # getch() will block delay for number of milliseconds given | ||
| window.bkgd(" ", curses.color_pair(1) | curses.A_BOLD) # Set window attributes | ||
| window.addstr(window.getmaxyx()[0] - 1, 2, "Press ESC to exit") | ||
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| return window | ||
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| def render(self, snake, apple): | ||
| """Render the game board in a window generated by the curses library.""" | ||
| window = self.initial_setup() | ||
| # Snake is represented by an "o" character | ||
| window.addch(snake[0][0], snake[0][1], "o") | ||
| # Apple is represented by an "*" character | ||
| window.addch(apple[0], apple[1], "*", curses.color_pair(2)) | ||
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| return window | ||
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| class Game: | ||
| """Responsible for executing the game.""" | ||
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| def __init__(self): | ||
| """Initializes the Game class.""" | ||
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| def pause(self, key, prev_key, window): | ||
| """Pauses game if the space bar is pressed; resumes game if pressed again.""" | ||
| if key == ord(" "): | ||
| key = -1 | ||
| # loop waiting to unpause when space bar is pressed again | ||
| while key != ord(" "): | ||
| key = window.getch() | ||
| key = prev_key | ||
| return key | ||
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| def game_over(self): | ||
| """Sets terminal functionality back to original state.""" | ||
| curses.nocbreak() | ||
| curses.echo() | ||
| curses.endwin() | ||
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| def play(self, snake, apple, score, window): | ||
| """Primary controller to play the game of snake.""" | ||
| try: | ||
| # Initial values | ||
| key = KEY_RIGHT | ||
| game_over = False | ||
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| # Key 27 = ESC | ||
| while key != 27 and game_over == False: | ||
| # Displays the user's current score | ||
| window.addstr( | ||
| 0, | ||
| window.getmaxyx()[1] - 12, | ||
| " Score: " + str(score) + " ", | ||
| curses.color_pair(1), | ||
| ) | ||
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| prev_key = key | ||
| # getch() refreshes the screen and waits for the user to hit a key | ||
| event = window.getch() | ||
| key = key if event == -1 else event | ||
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| # Pause game if space bar is pressed; | ||
| # Resume game if space bar is pressed again | ||
| self.pause(key, prev_key, window) | ||
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| # If an invalid key is pressed, do nothing | ||
| if key not in [KEY_LEFT, KEY_RIGHT, KEY_UP, KEY_DOWN, 27]: | ||
| key = prev_key | ||
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| # Calculate coordinates of snake | ||
| snake = Snake().move(snake, key, window) | ||
| # Enable snake to move across game board edges | ||
| Snake().move_across_edges(snake) | ||
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| # Game over if snake runs over itself | ||
| game_over = Snake().run_over_self(snake) | ||
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| # Snake ate apple | ||
| if snake[0] == apple: | ||
| score += 1 | ||
| apple = Apple().get_apple(snake) | ||
| # Paint a "*" character at the given (y, x) coordinates to display an apple | ||
| window.addch(apple[0], apple[1], "*", curses.color_pair(2)) | ||
| else: | ||
| last = snake.pop() | ||
| window.addch(last[0], last[1], " ") | ||
| # Snake ate apple, increase its length | ||
| window.addch(snake[0][0], snake[0][1], "o") | ||
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| finally: | ||
| self.game_over() | ||
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| def main(): | ||
| # Initial game values | ||
| height = 25 | ||
| width = 75 | ||
| begin_y = 0 | ||
| begin_x = 0 | ||
| score = 0 | ||
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| # Initialize game board | ||
| board = Board(height, width, begin_y, begin_x) | ||
| # Set initial coordinates for snake and apple | ||
| snake = Snake().get_snake() | ||
| apple = Apple().get_apple(snake) | ||
| # Initialize window (terminal screen) | ||
| window = board.render(snake, apple) | ||
| # Play game! | ||
| Game().play(snake, apple, score, window) | ||
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| if __name__ == "__main__": | ||
| main() |
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