问题
my problem here is that for my last 2 check points for my enemy for my tower defense game the enemys wont move down for the second last go untile they damage the tower video they just move forward idk why they just move out from there
its the same for the last one to
# move the enemy
for spider in spiders:
if spider.x < 230:
spider.x += spider.speed
elif spider.y < 160:
spider.x += spider.speed
elif spider.x > 540:
spider.y -= spider.speed
elif spider.y < 566:
spider.y += spider.speed
elif spider.y > 290:
spider.x += spider.speed
elif spider.y > 566:
spider.x += spider.speed
# THIS part isnt working IDK why if the enemy is close to the 4th check point it should go down but it wont??
elif spider.x < 628:
spider.y += spider.speed
# idk if this part will work because the last second part didnt work
elif spider.y < 550:
spider.x += spider.speed
my full code
import pygame,random
pygame.init()
# window
window = pygame.display.set_mode((1000,700), pygame.NOFRAME)
red = (0,255,0)
#
class spider:
def __init__(self,x,y,height,width,color):
self.x = x
self.y = y
self.height = height
self.width = width
self.color = color
self.speed = 13
self.rect = pygame.Rect(x,y,height,width)
self.health = 10
self.hitbox = (self.x + 20, self.y, 26,60)
# image frame
self.image = [pygame.image.load("weak (1).png"),
pygame.image.load("weak (2).png"),
pygame.image.load("weak (3).png"),
pygame.image.load("weak (4).png"),
pygame.image.load("weak (5).png"),
pygame.image.load("weak (6).png"),
pygame.image.load("weak (7).png"),
pygame.image.load("weak (8).png"),
pygame.image.load("weak (9).png"),
pygame.image.load("weak (10).png"),
pygame.image.load("weak (11).png"),
pygame.image.load("weak (12).png"),
pygame.image.load("weak (13).png"),
pygame.image.load("weak (14).png"),
pygame.image.load("weak (15).png"),
pygame.image.load("weak (16).png"),
pygame.image.load("weak (17).png"),
pygame.image.load("weak (18).png"),
pygame.image.load("weak (19).png")]
self.image = [pygame.transform.scale(image,(image.get_width()//2,image.get_height()//2)) for image in self.image]
self.anim_index = 0
self.walkrights = 0
self.fps = 40
self.clock = pygame.time.Clock()
self.direction = "up"
self.direction = "right"
def draw(self):
self.rect.topleft = (self.x,self.y)
self.clock.tick(self.fps)
image_list = self.image
if self.anim_index >= len(image_list):
self.anim_index = 0
player_image = image_list[self.anim_index]
self.anim_index += 1
player_rect = player_image.get_rect(center = self.rect.center)
player_rect.centerx += 3 # 10 is just an example
player_rect.centery += -10# 15 is just an example
window.blit(player_image, player_rect)
self.hitbox = (self.x + -18, self.y, 46,60)
pygame.draw.rect(window, (255,0,0), (self.hitbox[0], self.hitbox[1] - 40, 40, 13)) # NEW
pygame.draw.rect(window, (231, 76, 60), (self.hitbox[0], self.hitbox[1] - 40, 80 - (5 * (10 - self.health)), 13))
spiders = []
platformGroup = pygame.sprite.Group
level = [
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" c c c c c c c c c ",
" ",
" ",
" ",
" ",
" ",
" "]
for iy, row in enumerate(level):
for ix, col in enumerate(row):
if col == "c":
new_platforms = spider(ix*-24, iy*46, 50,50,(23, 32, 42))
spiders.append(new_platforms)
class tower:
def __init__(self,x,y,height,width,color):
self.x = x
self.y =y
self.height = height
self.width = width
self.color = color
self.rect = pygame.Rect(x,y,height,width)
self.health = 10
self.hitbox = (self.x + -18, self.y, 46,60)
def draw(self):
self.rect.topleft = (self.x,self.y)
self.hitbox = (self.x + -18, self.y, 46,60)
pygame.draw.rect(window, (255,0,0), (self.hitbox[0], self.hitbox[1] - 40, 140, 25)) # NEW
pygame.draw.rect(window, (46, 204, 113), (self.hitbox[0], self.hitbox[1] - 40, 140 - (5 * (10 - self.health)), 25))
tower1 = tower(875,450,50,50,red)
# check points for the player to turn
class check():
def __init__(self,x,y,height,width,color):
self.x = x
self.y = y
self.height = height
self.width = width
self.color = color
self.rect = pygame.Rect(x,y,height,width)
def draw(self):
self.rect.topleft = (self.x,self.y)
pygame.draw.rect(window,self.color,self.rect)
check1 = check(250,366,50,50,red)
check2 = check(250,566,50,50,red)
check3 = check(540,566,50,50,red)
check4 = check(780,166,50,50,red)
check5 = check(780,550,50,50,red)
checks = [check1,check2,check3,check4,check5]
# the background for my gameee
bg = pygame.image.load("bg2.png")
# redraw window
def draw():
window.fill((0,0,0))
window.blit(bg,(0,0))
for spider in spiders:
spider.draw()
for check in checks:
check.draw()
tower1.draw()
clock = pygame.time.Clock()
fps = 60
# the main loop
runninggame = True
while runninggame:
clock.tick(fps)
for event in pygame.event.get():
if event.type == pygame.QUIT:
runninggame = False
# move the enemy
for spider in spiders:
if spider.x < 230:
spider.x += spider.speed
elif spider.y < 160:
spider.x += spider.speed
elif spider.x > 540:
spider.y -= spider.speed
elif spider.y < 566:
spider.y += spider.speed
elif spider.y > 290:
spider.x += spider.speed
elif spider.y > 566:
spider.x += spider.speed
# THIS part isnt working IDK why if the enemy is close to the 4th check point it should go down but it wont??
elif spider.x < 628:
spider.y += spider.speed
# idk if this part will work because the last second part didnt work
elif spider.y < 550:
spider.x += spider.speed
# redraw the window
draw()
pygame.display.update()
pygame.quit()
回答1:
I recommend to move the scorpion along a list of points (spider_move). Use a variable that states the index of the next point (spider_move_to) and move the scorpion to this point (next_p). Every time when a point is reached, then increment the index (spider_move_to += 1). If no more point is in the list, then stop the movement. To move the scorpion, compute the difference ( dx, dy) between the current position of spider and the point from the list (next_p). Increment or decrement to position of the scorpion (spider.x, spider.y) by spider.speed, dependent on the amount of dx and dy:
spider_move_to = 0
spider_move = [
(240, 330), (240, 550), (540, 550), (540, 160),
(770, 160), (770, 550), (870, 550)]
runninggame = True
while runninggame:
# [...]
if spider_move_to < len(spider_move):
next_p = spider_move[spider_move_to]
dx, dy = (next_p[0] - spider.x, next_p[1] - spider.y)
if dx > spider.speed:
spider.x += spider.speed
elif dx < -spider.speed:
spider.x -= spider.speed
else:
spider.x = next_p[0]
if dy > spider.speed:
spider.y += spider.speed
elif dy < -spider.speed:
spider.y -= spider.speed
else:
spider.y = next_p[1]
if spider.x == next_p[0] and spider.y == next_p[1]:
spider_move_to += 1
# [...]
If you have multiple scorpions, then I recommend to make spider_move_to an attribute of the class spider
class spider:
def __init__(self,x,y,height,width,color):
# [...]
self.spider_move_to
Use the attribute instead of the global variable:
spider_move = [
(240, 330), (240, 550), (540, 550), (540, 160),
(770, 160), (770, 550), (870, 550)]
runninggame = True
while runninggame:
# [...]
for spider in spiders:
if spider.spider_move_to < len(spider_move):
next_p = spider_move[spider.spider_move_to]
dx, dy = (next_p[0] - spider.x, next_p[1] - spider.y)
# [...]
if spider.x == next_p[0] and spider.y == next_p[1]:
spider .spider_move_to += 1
# [...]
回答2:
A youtuber Tech With Tim has created a tower defense game with pygame in his 12 hour livestream . You will find his code on this github-link and you can figure it out where is the error.
Note: The assets are not included in this github code doesn't contain the assets(images and sounds)so you can create your assets folder and reference your images and sounds in your game script.
回答3:
When looking at your code I noticed this oddity
elif spider.x > 540:
spider.y -= spider.speed
...
elif spider.x < 628:
spider.y += spider.speed
this is based on the order you provided. The second elif can Never run as the spider doesn't ever go - x meaning we will never be able to get a result that is < 540 meaning > 540 is always true which also means that since Elif always runs the first true condition then we cannot actually get a value that will cause the condition < 628 to run before >540. I would suggest modifying the code to remove the possibility of this occurring by adding self.checkpoint as a property of each spider. Then when it reaches a check point you do a check in your if as so
elif spider.x > 540 and (spider.checkpoint = 3 or spider.checkpoint = 4):
if spider.checkpoint != 4:
spider.checkpoint = 4
spider.y -= spider.speed
for each checkpoint this will increment it to the next one for the first run and keep it there so that when you reach the next checkpoint just increment each number by 1 so that the spider always knows which checkpoint it is travelling to.
来源：https://stackoverflow.com/questions/63734280/pygame-enemys-wont-move-down-tower-defense-game