Question

我正在制作一个游戏但我正在使用下面的代码制作我正在为这个游戏制作的Hp酒吧课程有问题：

import pygame, sys

class hpbar():
    def __init__(self, hpchunk, screen, posx, posy):
        # hpchunk can either be 125 or 250
        self.hpchunk = hpchunk
        self.screen = screen
        self.posx = posx
        self.posy = posy
        self.unit_h = 18
        self.unit_w = 250
        self.image = pygame.image.load('hpbar.png')
        self.total_hp = [self.posx + 3, self.posy + 3, self.unit_w, self.unit_h]  # +3 is there due to the thickness of the actual HP bar 
        self.val_per_chunk = self.unit_w / self.hpchunk                     # units of a single chunk e.g. 250 / 125 = 2
        self.startPos = 253
        screen.blit(self.image, [self.posx, self.posy])
        pygame.draw.rect(screen, [0, 255, 0], self.total_hp, 0)

    def loss(self, loss_val):
        self.loss_val = loss_val
        total_chunk = self.loss_val * self.val_per_chunk                    
        chunkPosx = self.posx + self.startPos                               # e.g. if hpchunk = 125, then the hp will be in chunks of two
        healthbar = [0, 255, 0]
        chunkRangeEnd = self.unit_w - total_chunk                           
        total_chunk = 0                                                     # first iterative value
        stop_val = chunkPosx - total_chunk
        for lossx in range(self.unit_w, chunkRangeEnd, -self.val_per_chunk):
            pygame.draw.rect(self.screen, healthbar, self.total_hp, 0)      # hp bar 
            chunkPosx = chunkPosx - self.val_per_chunk                      # x position of chunk 
            total_chunk = total_chunk + self.val_per_chunk                  # total size of chunk
            if chunkPosx <= self.posx + 141:                                # yellow zone
                healthbar = [255, 255, 0]
            if chunkPosx <= self.posx + 48:                                 # red zone
                if self.val_per_chunk == 25:
                    healthbar = [255, 255, 255]
                else:
                    healthbar = [255, 0, 0]
            pygame.draw.rect(self.screen, [255, 0, 255], [chunkPosx, self.posy + 3, total_chunk, self.unit_h], 0)
            pygame.time.delay(200)
            pygame.display.flip()

    # chunkPosx = 253 + 150 = 403
    # total_chunk = 5 * 2 = 10
    # chunkRangeEnd = 250 - 20 = 230

    # chunkPosx iteration
    # x = x - 2
    # 403 = 403 - 2
    # 401 = 403 - 2     1st
    # 399 = 401 - 2     2nd
    # 397 = 399 - 2     3rd
    # 395 = 397 - 2     4th
    # 393 = 395 - 2     5th

    # total_chunk iteration
    # x = x + 2
    # 0 = 0 + 2
    # 2 = 0 + 2     1st 
    # 4 = 2 + 2     2nd
    # 6 = 4 + 2     3rd
    # 8 = 6 + 2     4th
    #10 = 8 + 2     5th 

pygame.init()
screen = pygame.display.set_mode([720, 480])
screen.fill((255, 255, 255))
pygame.display.flip()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

    # test, using hp bar instance
    newbar = hpbar(125, screen, 150, 150)
    newbar.loss(5)
    pygame.display.flip()

我这样编写了我的模块，以便在游戏的不同区域重复使用。另外需要注意的是，图像和一系列矩形用于显示hp。

每当我给我的损失方法赋值时，它会继续迭代从起始位置丢失的相同数量的块;这使得我很难在前一次调用第二种甚至第三种损失方法后叠加值，无论如何我可以阻止它吗？另一方面，这些块会随着时间的推移设置损耗/增益，所有这些都显示在我的hp条形图像上;我尝试在代码的不同区域使用break语句，但它们不会生成预期的输出，而是限制了丢失的总块值

如果你能帮助我，那将非常感激。如果我没有正确解释这一点，谢谢和apoligies。

Answer 1

我不清楚什么不起作用。

我认为你正在绘制HP栏，显示目标X％。随着时间的推移，这些块是否会为损失制作动画？如果是这样，暂停那里的延迟，将阻止你的程序的其余部分能够更新，直到它完成。或者它是否在栏中显示块？

你可以这样做的一种方式是：

class HpBar():
    def __init__(self, max_hp=56, cur_hp=20):
        self.max_hp = 56
        self.cur_hp = 20
        self.animating = False
        self.animate_delay = 200

    def damage(self, dmg):
        # damage and start animation
        self.cur_hp -= dmg
        self.started_ticks = pygame.time.get_ticks()        
        self.animating = True

    @property
    def ratio(self):
        # get ratio in the range [0., 1.] from original range [0, max_hp]
        return self.cur_hp * (1. / self.max_hp)

    def draw(self):
        # draw background max and current

        # start the same
        hp_box_max = Rect(...)
        hp_box_cur = Rect(hp_box_max)
        hp_box_animate = Rect(hp_box_max)
        hp_box_cur.width = self.ratio * hp_box_max.width

        # always show hp cur/max
        draw(hp_box_max)
        draw(hp_box_cur)

        # animation over?
        now = pygame.time.get_ticks()
        elapsed = now - self.started_ticks
        if now - elapsed > self.animate_duration:
            self.animating = False

        # only show extra effect if animating
        if self.animating:
            hp_box_animate.left = hp_box_cur.right
            hp_box_animate.right = hp_box_cur.right

            # now animate based on time elapsed
            chunks = elapsed / self.animate_delay

            # if elapsed is 200, chunks = 1
            # elapsed 400, chunks = 2 , etc...
            hp_box_animate.width = chunks * chunk_width    
            draw(hp_box_animate)

draw()重新计算3个rects，（如果动画结束，则为2）。如果您愿意，cur_hp可以升级为@property，它将自动呈现并缓存更新的曲面。我使用类似的方法来缓存文本的渲染，并且只有在数据导致设置脏bool时才重新渲染。

在我的hp栏中停止循环

1 个答案: