Question

我无法找到错误的来源，“健康”一度下降，但无法持续更新。失败似乎来自第105行，其中' - ='运算符似乎不起作用......

import pygame, random, funks
class screen_attributes():
    def __init__(self):
        global screen
        self.WIDTH=screen.get_width()
        self.HEIGHT=screen.get_height()
        self.CAPTION='space_race'
pygame.init()
s_info = pygame.display.Info()
screen = pygame.display.set_mode((s_info.current_w,s_info.current_h),pygame.FULLSCREEN)
main=screen_attributes()
pygame.display.set_caption(main.CAPTION)
def __init__():
    global main
    global exited
    exited = False
    global objects
    objects=[]
    for i in range(0, 50):
        objects.append(star())
    for i in range(0, 5):
        objects.append(battery())
    objects+=[ship()]
    for i in range(-1*(main.WIDTH-10),2*(main.WIDTH-10), 320):
        objects.append(asteroid(i,main.HEIGHT*-1))
        objects.append(asteroid(i,main.HEIGHT*2))
    for i in range(-1*(main.HEIGHT-10),2*(main.HEIGHT-10), 256):
        objects.append(asteroid(main.WIDTH*-1,i))
        objects.append(asteroid(main.WIDTH*2,i))
    global ui
    ui=[health_bar()]
    global flow
    flow='up'

class ship():
    def __init__(self):
        global main
        self.x= main.WIDTH/2-75
        self.y= main.HEIGHT/2-200
        self.direction= 'up'
        self.directions={'up':0 , 'down':180 , 'right':270 , 'left':90 ,}
        self.original_image=pygame.image.load('ship.png')
        self.image=self.original_image
        self.rects=self.image.get_rect()
        self.type='ship'
    def update(self):
        global flow
        global ui
        if pygame.key.get_pressed()[pygame.K_UP]:
            flow='up'
        if pygame.key.get_pressed()[pygame.K_DOWN]:
            flow='down'
        if pygame.key.get_pressed()[pygame.K_RIGHT]:
            flow='right'
        if pygame.key.get_pressed()[pygame.K_LEFT]:
            flow='left'
        self.image=pygame.transform.rotate(self.original_image, self.directions[flow])
        for item in objects:
            if funks.collided(self, item):
                if item.type=='battery':
                    ui[0].health=1.00
class star():
    def __init__(self):
        global main
        self.image=pygame.image.load('star.png')
        self.x=random.randint(-1*(main.WIDTH-10),2*(main.WIDTH-10))
        self.y=random.randint(-1*(main.HEIGHT-10),2*(main.HEIGHT-10))
        self.type='star'
    def update(self):
        if flow=='up':
            self.y+=1
        if flow=='down':
            self.y-=1
        if flow=='right':
            self.x-=1
        if flow=='left':
            self.x+=1
class asteroid():
    def __init__(self,x,y):
        self.image=pygame.image.load('asteroid.png')
        self.x=x
        self.y=y
        self.rects=self.image.get_rect()
        self.type='asteroid'
    def update(self):
        if flow=='up':
            self.y+=1
        if flow=='down':
            self.y-=1
        if flow=='right':
            self.x-=1
        if flow=='left':
            self.x+=1
class health_bar():
    def __init__(self):
        global main
        self.health=1.00
        self.image=pygame.image.load('health.png')
        self.y=20
        self.x=main.WIDTH*0.8
        self.height=20
        self.width=200
    def update(self):
        if self.health > 0.00:
            self.health-=0.0001
            print self.health
        self.image=pygame.transform.scale(self.image, (int(self.width*self.health), self.height))
class battery():
    def __init__(self):
        self.x=random.randint(-1*(main.WIDTH-10),2*(main.WIDTH-10))
        self.y=random.randint(-1*(main.HEIGHT-10),2*(main.HEIGHT-10))
        self.image=pygame.image.load('battery.png')
        self.rects=self.image.get_rect()
        self.type='battery'
    def update(self):
        if flow=='up':
            self.y+=1
        if flow=='down':
            self.y-=1
        if flow=='right':
            self.x-=1
        if flow=='left':
            self.x+=1












__init__()
while not exited:
    if pygame.key.get_pressed()[pygame.K_ESCAPE]:
        pygame.quit()
    pygame.event.get()
    screen.fill((0,0,0))
    for item in objects:
        item.update()
        screen.blit(item.image, [item.x, item.y])
    for item in ui:
        item.update()
        screen.blit(item.image, [item.x, item.y])
    pygame.display.update()

导入的'funks.py'文件只检测碰撞。

def collided(ob1, ob2):
    try:
        if ob1.x <= (ob2.x + (ob2.rect[0])) and (ob1.x + (ob1.rect[0])) >= ob2.x:
             if ob1.y <= (ob2.y + (ob2.rect[1])) and (ob1.y + (ob1.rect[1])) >= ob2.y:
                return True
    except:
        return 'no rects'

修订该漏洞源于列出的类的更新功能：

class health_bar():
    def __init__(self):
        global main
        self.health=1.00
        self.image=pygame.image.load('health.png')
        self.y=20
        self.x=main.WIDTH*0.8
        self.height=20
        self.width=200
    def update(self):
        if self.health > 0.00:
            self.health-=0.0001
            print self.health
        self.image=pygame.transform.scale(self.image, (int(self.width*self.health), self.height))

Answer 1

我自己发现了这个问题。感谢那些给出了富有成效的答案的人，但是我想告诉所有人，错误源于代码的一部分似乎并不完全相关或“最小”。在“太空船”更新功能中，它会检查船是否与任何“电池”发生碰撞。这段代码总是返回True，以后总是将生命值恢复到100％。

Answer 2

x=5
x-=1
print x

工作得很好......

class health_bar():
    def __init__(self):
        #global main
        self.health=1.00
        #self.image=pygame.image.load('health.png')
        self.y=20
        self.x=20
        self.height=20
        self.width=200
    def update(self):
        if self.health > 0.00:
            self.health-=0.0001
            print self.health

a = health_bar()
a.update()
a.update() 
a.update()

Python / PyGame - 健康栏被卡住; - =运算符似乎不起作用

2 个答案: