Pygame檢查碰撞不起作用

Question

我正在做一個Snake遊戲，我試圖檢測蛇的頭部和尾部之間的碰撞。

class Snake(): 
def __init__(self, screen, startx, starty, width, height, color): 
    self.screen = screen 
    self.startx = startx 
    self.starty = starty 
    self.width = width 
    self.height = height 
    self.color = color 
    self.amount_tiles = 5 
    self.tile = 0 
    self.position = [] 
    self.rect = pygame.Rect(startx, starty, width, height) #rectangle 1: Head of the Snake 
    pygame.draw.rect(screen, color, self.rect) 

-

def existing_tiles(self): 
    self.count = self.tile 

    while self.count > 0: 
     self.current_pos = self.position 
     x = self.current_pos[self.count - 1] 
     self.rect_new = pygame.Rect(x[0], x[1], self.width, self.height) #rectangle 2:Tail of the Snake 
     pygame.draw.rect(self.screen, GREEN, self.rect_new) 
     self.count = self.count - 1 

我嘗試使用pygame.Rect.colliderect（Rect1的，RECT2），因爲我與蛇頭和糧食矩形以前那樣，但它似乎並沒有工作。

Console output: AttributeError: 'Snake' object has no attribute 'rect_new' 

下面是完整的代碼：

import pygame 
import random 

RED = (255,0,0) 
WHITE = (255,255,255) 
GREEN = (0,255,0) 
BLUE = (0,128,255) 

#------------------------------FUNCTIONS--------------------------------# 
def main(): 

    pygame.init() 
    display_width=460 
    display_height=460 
    gameDisplay = pygame.display.set_mode((display_width, display_height)) 
    pygame.display.set_caption('Snake') 
    clock = pygame.time.Clock() 
    FPS = 10 

    schlange = Snake(gameDisplay, 220, 220, 20, 20, BLUE) 
    essen = Food(gameDisplay) 
    speed = (0,0) 

    while True: 
      #event loop 
     for event in pygame.event.get(): 
      if event.type == pygame.QUIT: 
       pygame.quit() 
       quit() 
      if event.type == pygame.KEYDOWN: 
       if event.key == pygame.K_UP: 
        speed = (0, -20) 
       if event.key == pygame.K_DOWN: 
        speed = (0, 20) 
       if event.key == pygame.K_LEFT: 
        speed = (-20, 0) 
       if event.key == pygame.K_RIGHT: 
        speed = (20, 0) 

     if pygame.Rect.colliderect(schlange.rect, essen.rect) == True: 
      essen = Food(gameDisplay) 
      schlange.eat() 

     if pygame.Rect.colliderect(schlange.rect, schlange.rect_new) == True: 
      print('rip') 
      pygame.quit() 
      quit() 


     schlange.move(speed[0], speed[1]) 
     essen.spawn() 
     clock.tick(FPS) 
     pygame.display.update() 

#------------------------------CLASSES---------------------------------# 
class Snake(): 
    def __init__(self, screen, startx, starty, width, height, color): 
     self.screen = screen 
     self.startx = startx 
     self.starty = starty 
     self.width = width 
     self.height = height 
     self.color = color 
     self.amount_tiles = 5 
     self.tile = 0 
     self.position = [] 
     self.rect = pygame.Rect(startx, starty, width, height) 
     pygame.draw.rect(screen, color, self.rect) 

    def move(self, x_change, y_change): 
     self.screen.fill(WHITE) 
     self.x_change = x_change 
     self.y_change = y_change 
     self.position.insert(0, (self.startx, self.starty)) 

     self.pos = self.position[self.tile] 

     '''self.add_tile()''' 
     self.existing_tiles() 

     self.startx += x_change 
     self.starty += y_change 
     self.rect = pygame.Rect(self.startx, self.starty, self.width, self.height) 
     pygame.draw.rect(self.screen, self.color, self.rect) 

    def existing_tiles(self): 
     self.count = self.tile 

     while self.count > 0: 
      self.current_pos = self.position 
      x = self.current_pos[self.count - 1] 
      self.rect_new = pygame.Rect(x[0], x[1], self.width, self.height) 
      pygame.draw.rect(self.screen, GREEN, self.rect_new) 
      self.count = self.count - 1 


    '''def add_tile(self): 
     x = self.pos[0] 
     y = self.pos[1] 
     pygame.draw.rect(self.screen, GREEN, (x, y, self.width, self.height))''' 

    def eat(self): 
     self.amount_tiles += 1 
     self.tile += 1 




class Food(): 

    def __init__(self, screen): 
     self.screen = screen 
     self.width = 20 
     self.height = 20 
     self.spawnx = random.randrange(0, 460, 20) 
     self.spawny = random.randrange(0, 460, 20) 
     self.rect = pygame.Rect(self.spawnx, self.spawny, self.width, self.height) 

    def spawn(self): 
     pygame.draw.rect(self.screen, RED, self.rect) 




if __name__ == '__main__': 
    main() 

提前感謝！

Answer 1

請嘗試下面您的遊戲的編輯版本。我做了兩個修改，並在代碼中寫了幾個註釋。

import pygame 
import random 

RED = (255,0,0) 
WHITE = (255,255,255) 
GREEN = (0,255,0) 
BLUE = (0,128,255) 

#------------------------------FUNCTIONS--------------------------------# 
def main(): 

    pygame.init() 
    display_width=460 
    display_height=460 
    gameDisplay = pygame.display.set_mode((display_width, display_height)) 
    pygame.display.set_caption('Snake') 
    clock = pygame.time.Clock() 
    FPS = 10 

    schlange = Snake(gameDisplay, 220, 220, 20, 20, BLUE) 
    essen = Food(gameDisplay) 
    speed = (0,0) 

    while True: 
      #event loop 
     for event in pygame.event.get(): 
      if event.type == pygame.QUIT: 
       pygame.quit() 
       quit() 
      if event.type == pygame.KEYDOWN: 
       if event.key == pygame.K_UP: 
        speed = (0, -20) 
       if event.key == pygame.K_DOWN: 
        speed = (0, 20) 
       if event.key == pygame.K_LEFT: 
        speed = (-20, 0) 
       if event.key == pygame.K_RIGHT: 
        speed = (20, 0) 

     if pygame.Rect.colliderect(schlange.rect, essen.rect) == True: 
      essen = Food(gameDisplay) 
      schlange.eat() 

     """ ADDED """ 

     """ I realized that you're storing the tail pieces in self.position. 
      Iterating through this list and checking for collisions seems to do the trick. 
      Skip check when there's only one element in schlange.position to avoid a collision as soon as the game starts. 
      Now you probably just need to prevent the snake from going straight back 
      into itself (180 degree turn) since that would trigger a collision that you might not want """ 

     if len(schlange.position) > 1: 
      for coords in schlange.position: 
       if pygame.Rect.colliderect(schlange.rect, pygame.Rect(coords[0], coords[1], schlange.width, schlange.height)) == True: 
        print('rip') 
        pygame.quit() 
        quit()    

     """ /ADDED """ 


     schlange.move(speed[0], speed[1]) 
     essen.spawn() 
     clock.tick(FPS) 
     pygame.display.update() 

#------------------------------CLASSES---------------------------------# 
class Snake(): 
    def __init__(self, screen, startx, starty, width, height, color): 
     self.screen = screen 
     self.startx = startx 
     self.starty = starty 
     self.width = width 
     self.height = height 
     self.color = color 
     self.amount_tiles = 5 
     self.tile = 0 
     self.position = [] 
     self.rect = pygame.Rect(startx, starty, width, height) 
     pygame.draw.rect(screen, color, self.rect) 

    def move(self, x_change, y_change): 
     self.screen.fill(WHITE) 
     self.x_change = x_change 
     self.y_change = y_change 
     self.position.insert(0, (self.startx, self.starty)) 

     self.pos = self.position[self.tile] 

     '''self.add_tile()''' 
     self.existing_tiles() 

     self.startx += x_change 
     self.starty += y_change 
     self.rect = pygame.Rect(self.startx, self.starty, self.width, self.height) 
     pygame.draw.rect(self.screen, self.color, self.rect) 


     """ ADDED """ 

     """ You kept adding to self.position but never deleted any elements. 
      That's unnecessary and would eventually cause a MemoryError """ 

     if len(self.position) > self.tile+1: 
      del self.position[-1] 

     """ /ADDED """ 

    def existing_tiles(self): 
     self.count = self.tile 

     while self.count > 0: 
      self.current_pos = self.position 
      x = self.current_pos[self.count - 1] 
      self.rect_new = pygame.Rect(x[0], x[1], self.width, self.height) 
      pygame.draw.rect(self.screen, GREEN, self.rect_new) 
      self.count = self.count - 1 


    '''def add_tile(self): 
     x = self.pos[0] 
     y = self.pos[1] 
     pygame.draw.rect(self.screen, GREEN, (x, y, self.width, self.height))''' 

    def eat(self): 
     self.amount_tiles += 1 
     self.tile += 1 




class Food(): 

    def __init__(self, screen): 
     self.screen = screen 
     self.width = 20 
     self.height = 20 
     self.spawnx = random.randrange(0, 460, 20) 
     self.spawny = random.randrange(0, 460, 20) 
     self.rect = pygame.Rect(self.spawnx, self.spawny, self.width, self.height) 

    def spawn(self): 
     pygame.draw.rect(self.screen, RED, self.rect) 




if __name__ == '__main__': 
    main()