Pygame window 会突然填充白色

Question

我正在制作一个砍树游戏，当你砍倒一棵树时，它会从 3 开始倒计时，直到砍倒它。然而，在倒计时过程中，window 将全部填充为白色，除了屏幕底部的倒计时文本外，什么也看不到。倒计时结束后，一切都会return恢复正常。有人能告诉我为什么会这样吗？完整代码如下：

import pygame
import time
pygame.init()
root = pygame.display.set_mode((603, 573))
pygame.display.set_caption("Foraging Simulator")
window_is_open = True
white = (255, 255, 255)
black = (0, 0, 0)
width = 10
leaves_width = 30
height = 20
leaves_height = 10
x = 0
tree_trunk_x = 10
y = 0
tree_trunk_y = 10
vel = 5
brown = (150, 75, 0)
green = (58, 95, 11)
class Tree:
    def __init__(self, tree_x, tree_y, tree_property_name):
        self.tree_x = tree_x
        self.tree_y = tree_y
        self.tree_property_name = tree_property_name
        self.trunk = None
        self.leaves = None
    def destroy(self):
        count = pygame.font.SysFont('Tahoma', 18, True, False)
        countdown = count.render('3', True, (0, 0, 0))
        root.blit(countdown, (583, 553))
        pygame.display.update()
        time.sleep(1)
        pygame.draw.rect(root, (255, 255, 255), (583, 553, 20, 30))
        pygame.display.update()
        count = pygame.font.SysFont('Tahoma', 18, True, False)
        countdown = count.render('2', True, (0, 0, 0))
        root.blit(countdown, (583, 553))
        pygame.display.update()
        time.sleep(1)
        pygame.draw.rect(root, (255, 255, 255), (583, 553, 20, 30))
        pygame.display.update()
        count = pygame.font.SysFont('Tahoma', 18, True, False)
        countdown = count.render('1', True, (0, 0, 0))
        root.blit(countdown, (583, 553))
        pygame.display.update()
        time.sleep(1)
        pygame.draw.rect(root, (255, 255, 255), (583, 553, 20, 30))
        pygame.display.update()
        self.tree_property_name = False
    def create_tree(self):
        if self.tree_property_name:
            trunk_x = self.tree_x + 10
            trunk_y = self.tree_y + 10
            self.trunk = pygame.draw.rect(root, brown, (trunk_x, trunk_y, width, height))
            self.leaves = pygame.draw.rect(root, green, (self.tree_x, self.tree_y, leaves_width, leaves_height))
    def redraw(self):
        self.create_tree()
tree_one_property = True
tree_two_property = True
tree_three_property = True
tree_four_property = True
tree_five_property = True
tree_six_property = True
tree_seven_property = True
tree_eight_property = True
tree_nine_property = True
tree_ten_property = True
tree_eleven_property = True
tree_twelve_property = True
tree_thirteen_property = True
tree_fourteen_property = True
tree_fifteen_property = True
tree_sixteen_property = True
tree_seventeen_property = True
tree_eighteen_property = True
tree_nineteen_property = True
tree_twenty_property = True
tree_twenty_one_property = True
tree_twenty_two_property = True
tree_twenty_three_property = True
tree_twenty_four_property = True
tree_twenty_five_property = True
tree_one = Tree(0, 0, tree_one_property)
tree_two = Tree(50, 0, tree_two_property)
tree_three = Tree(100, 0, tree_three_property)
tree_four = Tree(150, 0, tree_four_property)
tree_five = Tree(200, 0, tree_five_property)
tree_six = Tree(0, 50, tree_six_property)
tree_eight = Tree(100, 50, tree_eight_property)
tree_seven = Tree(50, 50, tree_seven_property)
tree_nine = Tree(150, 50, tree_nine_property)
tree_ten = Tree(200, 50, tree_ten_property)
tree_eleven = Tree(0, 100, tree_eleven_property)
tree_twelve = Tree(50, 100, tree_twelve_property)
tree_thirteen = Tree(100, 100, tree_thirteen_property)
tree_fourteen = Tree(150, 100, tree_fourteen_property)
tree_fifteen = Tree(200, 100, tree_fifteen_property)
tree_sixteen = Tree(0, 150, tree_sixteen_property)
tree_seventeen = Tree(50, 150, tree_seventeen_property)
tree_eighteen = Tree(100, 150, tree_eighteen_property)
tree_nineteen = Tree(150, 150, tree_nineteen_property)
tree_twenty = Tree(200, 150, tree_twenty_property)
tree_twenty_one = Tree(0, 200, tree_twenty_one_property)
tree_twenty_two = Tree(50, 200, tree_twenty_two_property)
tree_twenty_three = Tree(100, 200, tree_twenty_three_property)
tree_twenty_four = Tree(150, 200, tree_twenty_four_property)
tree_twenty_five = Tree(200, 200, tree_twenty_five_property)
root.fill(white)
while window_is_open:
    pygame.time.delay(100)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            window_is_open = False
        if pygame.mouse.get_pressed()[0] and tree_one.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_one.destroy()
        if pygame.mouse.get_pressed()[0] and tree_two.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_two.destroy()
        if pygame.mouse.get_pressed()[0] and tree_three.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_three.destroy()
        if pygame.mouse.get_pressed()[0] and tree_four.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_four.destroy()
        if pygame.mouse.get_pressed()[0] and tree_five.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_five.destroy()
        if pygame.mouse.get_pressed()[0] and tree_six.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_six.destroy()
        if pygame.mouse.get_pressed()[0] and tree_seven.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_seven.destroy()
        if pygame.mouse.get_pressed()[0] and tree_eight.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_eight.destroy()
        if pygame.mouse.get_pressed()[0] and tree_nine.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_nine.destroy()
        if pygame.mouse.get_pressed()[0] and tree_ten.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_ten.destroy()
        if pygame.mouse.get_pressed()[0] and tree_eleven.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_eleven.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twelve.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twelve.destroy()
        if pygame.mouse.get_pressed()[0] and tree_thirteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_thirteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_fourteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_fourteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_fifteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_fifteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_sixteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_sixteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_seventeen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_seventeen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_eighteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_eighteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_nineteen.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_nineteen.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty_one.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty_one.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty_two.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty_two.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty_three.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty_three.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty_four.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty_four.destroy()
        if pygame.mouse.get_pressed()[0] and tree_twenty_five.trunk.collidepoint(pygame.mouse.get_pos()):
            tree_twenty_five.destroy()
    keys = pygame.key.get_pressed()
    if keys[pygame.K_RIGHT]:
        x += vel
    if keys[pygame.K_LEFT]:
        x -= vel
    if keys[pygame.K_UP]:
        y -= vel
    if keys[pygame.K_DOWN]:
        y += vel
    font = pygame.font.SysFont('Tahoma', 18, True, False)
    score = font.render('Score:', True, (0, 0, 0))
    root.blit(score, (410, 0))
    rectangle = pygame.draw.rect(root, (0, 0, 0), (x, y, width, 10)) 
    tree_one.redraw()
    tree_two.redraw()
    tree_three.redraw()
    tree_four.redraw()
    tree_five.redraw()
    tree_six.redraw()
    tree_seven.redraw()
    tree_eight.redraw()
    tree_nine.redraw()
    tree_ten.redraw()
    tree_eleven.redraw()
    tree_twelve.redraw()
    tree_thirteen.redraw()
    tree_fourteen.redraw()
    tree_fifteen.redraw()
    tree_sixteen.redraw()
    tree_seventeen.redraw()
    tree_eighteen.redraw()
    tree_nineteen.redraw()
    tree_twenty.redraw()
    tree_twenty_one.redraw()
    tree_twenty_two.redraw()
    tree_twenty_three.redraw()
    tree_twenty_four.redraw()
    tree_twenty_five.redraw()
    pygame.display.update()
    root.fill(white)   
pygame.quit()

Answer 1

当树被摧毁时属性self.tree_property_name就足够了:

class Tree:
    def __init__(self, tree_x, tree_y):
        self.tree_x = tree_x
        self.tree_y = tree_y
        self.tree_property_name = True
        self.trunk = None
        self.leaves = None

    # [...]

    def destroy(self):
        self.tree_property_name = False

创建一个树列表而不是单独的变量：

trees = []
for x in range(4):
    for y in range (4):
        trees.append(Tree(x*50, y*50))

在列表中画树：

while window_is_open:
    # [...]

    for tree in trees:
        tree.redraw()

评估是否循环单击树并在几秒内启动 count_down:

count_down = 0
destroy_tree = None
while window_is_open:
    delta_time = pygame.time.delay(100)

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            window_is_open = False

        elif event.type == pygame.MOUSEBUTTONDOWN:
            if destroy_tree == None and event.button == 1:
                for tree in trees:
                    if tree.tree_property_name:
                        if tree.trunk.collidepoint(event.pos) or tree.leaves.collidepoint(event.pos):
                            count_down = 3
                            destroy_tree = tree

当计数到期时销毁密钥：

while window_is_open:
    # [...]

    number = 0
    if destroy_tree != None:
        count_down -= delta_time / 1000
        if count_down > 0:
            number = int(count_down) +1
        else:
            destroy_tree.destroy()
            destroy_tree = None

看例子：

import pygame
import time
pygame.init()
root = pygame.display.set_mode((603, 573))
pygame.display.set_caption("Foraging Simulator")
window_is_open = True
white = (255, 255, 255)
black = (0, 0, 0)
width = 10
leaves_width = 30
height = 20
leaves_height = 10
x = 0
tree_trunk_x = 10
y = 0
tree_trunk_y = 10
vel = 5
brown = (150, 75, 0)
green = (58, 95, 11)

class Tree:
    def __init__(self, tree_x, tree_y):
        self.tree_x = tree_x
        self.tree_y = tree_y
        self.tree_property_name = True
        self.trunk = None
        self.leaves = None
    def create_tree(self):
        if self.tree_property_name:
            trunk_x = self.tree_x + 10
            trunk_y = self.tree_y + 10
            self.trunk = pygame.draw.rect(root, brown, (trunk_x, trunk_y, width, height))
            self.leaves = pygame.draw.rect(root, green, (self.tree_x, self.tree_y, leaves_width, leaves_height))
    def destroy(self):
        self.tree_property_name = False
    def redraw(self):
        self.create_tree()

trees = []
for x in range(4):
    for y in range (4):
        trees.append(Tree(x*50, y*50))

count_down = 0
destroy_tree = None
while window_is_open:
    delta_time = pygame.time.delay(100)

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            window_is_open = False

        elif event.type == pygame.MOUSEBUTTONDOWN:
            if destroy_tree == None and event.button == 1:
                for tree in trees:
                    if tree.tree_property_name:
                        if tree.trunk.collidepoint(event.pos) or tree.leaves.collidepoint(event.pos):
                            count_down = 3
                            destroy_tree = tree

    keys = pygame.key.get_pressed()
    if keys[pygame.K_RIGHT]:
        x += vel
    if keys[pygame.K_LEFT]:
        x -= vel
    if keys[pygame.K_UP]:
        y -= vel
    if keys[pygame.K_DOWN]:
        y += vel

    number = 0
    if destroy_tree != None:
        count_down -= delta_time / 1000
        if count_down > 0:
            number = int(count_down) + 1
        else:
            destroy_tree.destroy()
            destroy_tree = None

    font = pygame.font.SysFont('Tahoma', 18, True, False)
    score = font.render('Score:', True, (0, 0, 0))  
    countdown = font.render(str(number), True, (0, 0, 0))

    root.fill(white)   
    root.blit(score, (410, 0))
    root.blit(countdown, (583, 553))  
    for tree in trees:
        tree.redraw()
    pygame.display.update()

pygame.quit()

Pygame window 会突然填充白色

Pygame window will suddenly fill with white

python

pygame

fill

python-3.x

pygame-surface