当food.rect
和snake.rect
碰撞时,我正在尝试向蛇克隆中的玩家添加片段。但是,该函数内部的代码将无法执行。
def add_segment(self,food):
if self.rect.colliderect(food.rect):
snake_segment = Snake(GREEN,RECTANGLE_WIDTH,RECTANGLE_HEIGHT)
self.body.append(snake_segment)
print('this code works!')
如果需要,这里是我的其余代码。我已经为这个问题苦苦挣扎了好几天了,所以任何帮助将不胜感激!
import pygame,sys,random
from pygame.locals import *
pygame.init()
WINDOW_HEIGHT = 500
WINDOW_WIDTH = 500
RECTANGLE_HEIGHT = 20
RECTANGLE_WIDTH = 20
GREEN = (0,255,0)
WHITE = (255,255,255)
BLACK = (0,0,0)
RED = (255,0,0)
clock = pygame.time.Clock()
SCREEN = pygame.display.set_mode((WINDOW_WIDTH,WINDOW_HEIGHT))
pygame.display.set_caption("Snake")
class Snake(object):
def __init__(self, color, width, height):
self.body = []
self.image = pygame.Surface((width,height))
self.image.fill(GREEN)
self.rect = self.image.get_rect()
self.speed = 20
self.direction = 'right'
self.body = []
self.living = True
self.move = (0,0)
def movement(self):
self.rect.move_ip(self.move)
self.rect.clamp_ip(SCREEN.get_rect())
def blit(self):
SCREEN.blit(self.image,self.rect)
def update(self,food):
self.add_segment(food)
self.draw_snake()
self.movement()
print(self.rect.colliderect(food.rect))
print(self.body)
def add_segment(self,food):
if self.rect.colliderect(food.rect):
snake_segment = Snake(GREEN,RECTANGLE_WIDTH,RECTANGLE_HEIGHT)
self.body.append(snake_segment)
print('this code works!')
def draw_snake(self):
if len(self.body) == 0:
self.blit()
elif len(self.body) >= 1:
for snake_segment in self.body:
snake_segment.blit()
class Food(object):
def __init__(self,color,width,height):
self.image = pygame.Surface((width,height))
self.image.fill(RED)
self.rect = self.image.get_rect()
self.rect.x = random.randrange(20,500,20)
self.rect.y = random.randrange(20,500,20)
self.state = 'uneaten'
def check_eaten(self,snake):
if snake.rect.colliderect(self.rect):
self.state = 'eaten'
def blit(self):
SCREEN.blit(self.image,self.rect)
def update_state(self,snake):
self.check_eaten(snake)
if self.state == 'uneaten':
self.blit()
elif self.state == 'eaten':
self.rect.x = random.randrange(0,500,20)
self.rect.y = random.randrange(0,500,20)
if self.rect.x == snake.rect.x or self.rect.x == snake.rect.y:
self.rect.x = random.randrange(0,500,20)
self.rect.y = random.randrange(0,500,20)
self.blit()
self.state = 'uneaten'
def update(self,snake):
self.update_state(snake)
print(self.state)
def event_loop(snake,food):
while True:
SCREEN.fill(BLACK)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_RIGHT:
snake.move = (snake.speed,0)
snake.direction = 'right'
elif event.key == K_LEFT:
snake.move = (-snake.speed,0)
snake.direction = 'left'
elif event.key == K_UP:
snake.move = (0,-snake.speed)
snake.direction = 'up'
elif event.key == K_DOWN:
snake.move = (0,snake.speed)
snake.direction = 'down'
food.update(snake)
snake.update(food)
pygame.display.update()
clock.tick(5)
SNAKE = Snake(GREEN,RECTANGLE_WIDTH,RECTANGLE_HEIGHT)
FOOD = Food(RED,RECTANGLE_WIDTH,RECTANGLE_HEIGHT)
event_loop(SNAKE,FOOD)
答案 0 :(得分:0)
这都是秩序的问题。
food.update(snake)
测试食物是否与奶昔碰撞并将食物放置在新位置。
snake.update(food)
测试是蛇与食物碰撞并将一段附加到蛇上。
因此,如果在food.update(snake)
之前执行snake.update(food)
,则蛇将永远不会吃掉食物,因为食物在以下时间之前被移走了:
food.update(snake)
snake.update(food)
snake.update(food)
food.update(snake)
蛇永远不会在绘制位置,因为在移动self.draw_snake()
之前,蛇已绘制self.movement()
。
您必须按以下顺序进行:
class Snake(object):
# [...]
def update(self,food):
self.movement()
self.add_segment(food)
self.draw_snake()