{"id":6598,"date":"2020-07-23T10:25:53","date_gmt":"2020-07-23T08:25:53","guid":{"rendered":"https:\/\/pythonprogramming.altervista.org\/?p=6598"},"modified":"2020-07-23T10:25:53","modified_gmt":"2020-07-23T08:25:53","slug":"snake-version-2","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/snake-version-2\/","title":{"rendered":"Snake version 2"},"content":{"rendered":"

A different user evet type of management in this snake game version.<\/p>\n

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import pygame\r\nfrom pygame import gfxdraw\r\nimport random\r\n\r\n\r\n# Define Constants\r\n\r\nBOARD_SIZE = 20  # Size of the board, in block\r\nBLOCK_SIZE = 20  # Size of 1 block, in pixel\r\nGAME_SPEED = 8  # Game speed (Normal = 10), The bigger, the faster\r\nSIZE = (BOARD_SIZE * BLOCK_SIZE, BOARD_SIZE * BLOCK_SIZE)\r\nwindow = pygame.display.set_mode(SIZE)\r\npygame.display.set_caption(\"window\")\r\nscore = 0\r\n\r\n\r\n# ============================ THE SNAKE POSITION AND BEHAVIOUR ======\r\n\r\nclass Snake():\r\n    def __init__(self):\r\n        self.starting_position()\r\n\r\n    def starting_position(self):\r\n        \"The coordinates of the start and direction are here\"\r\n\r\n        self.head = [\r\n            # self.head[0] = x = 5\r\n            int(BOARD_SIZE \/ 4),\r\n            # self.head[1] = x = 5\r\n            int(BOARD_SIZE \/ 4)]\r\n        self.body = [[self.head[0], self.head[1]],\r\n                     [self.head[0] - 1, self.head[1]],\r\n                     [self.head[0] - 2, self.head[1]]\r\n                     ]\r\n        #   [ ][ ][ ] => right\r\n        self.direction = \"RIGHT\"\r\n\r\n    def change_direction_to(self, dir):\r\n        \"When you hit a key in the while loop; avoid going backwards\"\r\n        if dir == \"RIGHT\" and not self.direction == \"LEFT\":\r\n            self.direction = \"RIGHT\"\r\n        if dir == \"LEFT\" and not self.direction == \"RIGHT\":\r\n            self.direction = \"LEFT\"\r\n        if dir == \"UP\" and not self.direction == \"DOWN\":\r\n            self.direction = \"UP\"\r\n        if dir == \"DOWN\" and not self.direction == \"UP\":\r\n            self.direction = \"DOWN\"\r\n\r\n    def move(self, food_pos):\r\n        \"Continue to move in the dir, place one square forward, delete last\"\r\n        # if do not eat, return 1 if you eat\r\n        # so that in the while loop... score += 1 GAME_SPEED +=1 food_spawn\r\n        if self.direction == \"RIGHT\":\r\n            self.head[0] += 1\r\n        if self.direction == \"LEFT\":\r\n            self.head[0] -= 1\r\n        if self.direction == \"UP\":\r\n            self.head[1] -= 1\r\n        if self.direction == \"DOWN\":\r\n            self.head[1] += 1\r\n        # [][][]\r\n        self.body.insert(0, list(self.head))\r\n        # [][][][]\r\n        if self.head == food_pos:\r\n            # [][][][]  it grows after he ate\r\n            return 1\r\n        else:\r\n            \"If do not eat... same size\"\r\n            self.body.pop()\r\n            # pop([])   [][][]  it stays of the same size, but moves\r\n            return 0\r\n\r\n    def check_collision(self):\r\n        # Checks collision with border or himself\r\n\r\n        conditions = (\r\n            # x axis limits  <0 ..... >20\r\n            self.head[0] >= 20 or self.head[0] < 0,\r\n            # y axis\r\n            self.head[1] > 19 or self.head[1] < 0,\r\n            # checks if you hit yourself\r\n            # comprehension list - a for loop with a python syntax\r\n            [x for x in self.body[1:] if self.head == x]\r\n        )\r\n        if any(conditions):\r\n            return 1\r\n        else:\r\n            return 0\r\n\r\n# ============================= SPAWN FOOD =======================\r\n\r\nclass FoodSpawner():\r\n    def __init__(self):\r\n        self.food_pos = [random.randrange(1, BOARD_SIZE), random.randrange(1, BOARD_SIZE)]\r\n        self.is_food_on_screen = True\r\n\r\n    def spawn_food(self):\r\n        if self.is_food_on_screen == False:\r\n            self.food_pos = [random.randrange(1, BOARD_SIZE), random.randrange(1, BOARD_SIZE)]\r\n            self.is_food_on_screen = True\r\n        return self.food_pos\r\n\r\n    def set_food_on_screen(self, bool_value):\r\n        self.is_food_on_screen = bool_value\r\n\r\n\r\n# ===================== DRAW HEAD, BODY and FOOD ================\r\n\r\n\r\ndef draw_head(pos):\r\n    pygame.draw.rect(\r\n        window,\r\n        (0, 255, 0),\r\n        pygame.Rect(\r\n            pos[0] * BLOCK_SIZE,\r\n            pos[1] * BLOCK_SIZE,\r\n            BLOCK_SIZE,\r\n            BLOCK_SIZE))\r\n\r\ndef draw_body(pos):\r\n    pygame.draw.rect(window, (0, 128, 0), pygame.Rect(pos[0] * BLOCK_SIZE, pos[1] * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE))\r\n\r\ndef delete_tail(pos):\r\n    pygame.draw.rect(window, (0, 0, 0), pygame.Rect(snake.body[-1][0] * BLOCK_SIZE, snake.body[-1][1] * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE))\r\n\r\ndef delete_fruit(pos, food_pos):\r\n    x = food_pos[0] * BLOCK_SIZE + 10\r\n    y = food_pos[1] * BLOCK_SIZE + 10\r\n    r = 9\r\n    gfxdraw.filled_circle(window, x, y, r, (0, 0, 0))\r\n\r\ndef draw_fruit(food_pos):\r\n    gfxdraw.filled_circle(window, food_pos[0] * BLOCK_SIZE + 10, food_pos[1] * BLOCK_SIZE + 10, 9, (255, 0, 0))\r\n\r\n\r\n# =========== To write on the window surface on the screen ========\r\n\r\ndef write(text_to_show, x=0, y=0, middle=\"both\"):\r\n    \"It write in the middle by default, if not middle='both' middle='x'\"\r\n    text = font.render(text_to_show, 1, pygame.Color(\"Coral\"))\r\n    if middle == \"x\":\r\n        text_rect = text.get_rect(center=((size \/\/ 2, y)))\r\n        window.blit(text, text_rect)      \r\n    elif middle == \"both\":\r\n        text_rect = text.get_rect(center=((size \/\/ 2, size \/\/ 2)))\r\n        window.blit(text, text_rect)\r\n    else:\r\n        window.blit(text, (x, y))\r\n    pygame.display.update()\r\n\r\n\r\n# ================================= MANAGE GAME PART =================\r\n\r\ndef restart():\r\n    global GAME_SPEED\r\n\r\n    GAME_SPEED = 8\r\n    window.fill((0, 0, 0))\r\n    snake.starting_position()\r\n    start()\r\n\r\n\r\ndef press_to_start():\r\n    \"Initial menu\"\r\n    global loop, snake, food_spawner\r\n    global font, size\r\n\r\n    pygame.init()\r\n    font = pygame.font.SysFont(\"Arial\", 24)\r\n    size = BOARD_SIZE * BLOCK_SIZE # 400 20x20\r\n    snake = Snake()\r\n    food_spawner = FoodSpawner()\r\n    write(\"Python vs Snake\", y=30, middle=\"x\")\r\n    write(\"Press s to start\")\r\n    while True:\r\n        event = pygame.event.wait()\r\n        if event.type == pygame.QUIT:\r\n            loop = 0\r\n            break\r\n        if event.type == pygame.KEYDOWN:\r\n            if event.key == pygame.K_ESCAPE:\r\n                loop = 0\r\n                break\r\n            if event.key == pygame.K_s:\r\n                restart()\r\n                break\r\n    pygame.quit()\r\n\r\n\r\ndef start():\r\n    \"Starts the game\"\r\n    global GAME_SPEED, score, loop\r\n\r\n    clock = pygame.time.Clock()\r\n    food_pos = food_spawner.spawn_food()\r\n    loop = 1\r\n    while loop:\r\n        for event in pygame.event.get():\r\n            if event.type == pygame.QUIT:\r\n                loop = 0\r\n            elif event.type == pygame.KEYDOWN:\r\n                if event.key == pygame.K_ESCAPE:\r\n                    loop = 0\r\n                elif event.key == pygame.K_RIGHT:\r\n                    snake.change_direction_to(\"RIGHT\")\r\n                elif event.key == pygame.K_UP:\r\n                    snake.change_direction_to(\"UP\")\r\n                elif event.key == pygame.K_DOWN:\r\n                    snake.change_direction_to(\"DOWN\")\r\n                elif event.key == pygame.K_LEFT:\r\n                    snake.change_direction_to(\"LEFT\")\r\n        if snake.move(food_pos) == 1:\r\n            # delete_fruit(pos, food_pos)\r\n            score += 1\r\n            food_spawner.set_food_on_screen(False)\r\n            GAME_SPEED += 1\r\n            food_pos = food_spawner.spawn_food()\r\n\r\n        head = 1\r\n        for pos in snake.body:\r\n            if head == 1:\r\n                draw_head(pos)\r\n                head = 0\r\n            else:\r\n                draw_body(pos)\r\n        delete_tail(pos)\r\n        draw_fruit(food_pos)\r\n\r\n        if snake.check_collision() == 1:\r\n            loop = 0\r\n            press_to_start()\r\n        pygame.display.update()\r\n        clock.tick(GAME_SPEED)\r\n\r\n    pygame.quit()\r\n\r\npress_to_start()\r\n<\/pre>\n
 <\/p>\n\r\n