如何为简单应用正确设置脏矩形：逻辑问题

问题描述

我目前只是在使用 Pygame 显示器测试水域，因为我对这个模块非常陌生。

代码如下：

import pygame 

pygame.init() 

SCALE = 1
display_width = int(1200 * SCALE)
display_height = int(800 * SCALE)
x = (display_width * 0.45)
y = (display_height * 0.8)

transparent = (0,0)
black = (0,0)
white = (255,255,255)
green = (44,215,223)
red = (255,67,34)
blue = (77,77,77)

count = 0
running = True
Box1_image = True
Box3_image = True

background = pygame.image.load('C:/Users/Justi/source/repos/03 Game/Game/assets/background.jpg')
dirty_spot = pygame.image.load('C:/Users/Justi/source/repos/03 Game/Game/assets/dirty.png')

background_resized = pygame.transform.scale(dirty_spot,(display_width,display_height))
background_rect = background_resized.get_rect()
gamedisplay = pygame.display.set_mode(background_rect.size)

pygame.display.set_caption("Game 1") 
clock = pygame.time.Clock()

dirty_spot_resized = pygame.transform.scale(dirty_spot,(200,200))
square_dirty_spot = dirty_spot_resized.convert()
rect_dirty_spot = square_dirty_spot.get_rect()

def dirtyspot1(imagex,imagey):

    gamedisplay.blit(dirty_spot_resized,(imagex,imagey))

while running:

    rects = []
    if rects != []:
        pygame.display.update(rects)        

    for event in pygame.event.get():
        if event.type == pygame.quit:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_r:
                running = False

    #if Box3_image: #Replacing the Bool passing variable with a simple loop count to trigger the else condition
    if count < 50:
        print("Test 1")
        dirtyspot1(0,0)
        pygame.display.update() 
    else:
        print("Test 2")
        dirty_rect = background.subsurface(rect_dirty_spot)
        gamedisplay.blit(dirty_rect,(0,0))
        rects.append(pygame.Rect(0,200,200))
        
    gamedisplay.fill(white)
    clock.tick(30)
    count += 1

pygame.quit()
quit()

Box1_image 和 Box1_image 是布尔变量，用于标记从另一个函数传递的某些条件。

但是我通过使用 print("Test 2") 进行了一个简单的测试，使上述变量得以通过。但是，当它尝试 blit dirty_rect 时。 pygame 显示没有任何变化。

资产（如果需要）： background.jpg dirty.png

我可以检查缺少什么以正确“移除/删除”dirty_spot blit？提前致谢。

解决方法

喜欢吗？ （我把FPS改成5了所以需要一段时间才能改）

import pygame 

pygame.init() 

SCALE = 1
display_width = int(1200 * SCALE)
display_height = int(800 * SCALE)
x = (display_width * 0.45)
y = (display_height * 0.8)

transparent = (0,0)
black = (0,0)
white = (255,255,255)
green = (44,215,223)
red = (255,67,34)
blue = (77,77,77)

count = 0
running = True
box1_image = True
box3_image = True

background = pygame.image.load('background.jpg')
dirty_spot = pygame.image.load('dirty.png')

background_resized = pygame.transform.scale(background,(display_width,display_height))
background_rect = background_resized.get_rect()
gameDisplay = pygame.display.set_mode(background_rect.size)

pygame.display.set_caption("Game 1") 
clock = pygame.time.Clock()

dirty_spot_resized = pygame.transform.scale(dirty_spot,(200,200))
square_dirty_spot = dirty_spot_resized.convert()
rect_dirty_spot = square_dirty_spot.get_rect()

def dirtyspot1(imagex,imagey):

    gameDisplay.blit(dirty_spot_resized,(imagex,imagey))

while running:

    rects = []
    if rects != []:
        pygame.display.update(rects)        

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_r:
                running = False

    gameDisplay.fill(white)
    
    #if box3_image: #Replacing the Bool passing variable with a simple loop count to trigger the else condition
    if count < 50:
        print("Test 1")
        dirtyspot1(0,0)
    else:
        print("Test 2")
        dirty_rect = background.subsurface(rect_dirty_spot)
        gameDisplay.blit(dirty_rect,(0,0))
        rects.append(pygame.Rect(0,200,200))
   
    pygame.display.update() 
        
    clock.tick(5)
    count += 1

pygame.quit()
quit()

我认为您误解了一些事情。您可以将一个图像或表面 blit 到另一个顶部，然后像这样构建内容，然后将它们 blit 到显示器上，最后更新显示器。

你有这条线：

background_resized = pygame.transform.scale(dirty_spot,display_height))

我认为应该是背景而不是dirty_spot。

我把对 display.update() 的调用移出了 if 循环，因为你最后调用了 display.update()。

,

import pygame 

pygame.init() 

SCALE = 1
display_width = int(1200 * SCALE)
display_height = int(800 * SCALE)
x = (display_width * 0.45)
y = (display_height * 0.8)

transparent = (0,display_height))
background_rect = background_resized.get_rect()

gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("Game 1") 
clock = pygame.time.Clock()

dirty_spot_resized = pygame.transform.scale(dirty_spot,200))
square_dirty_spot = dirty_spot_resized.convert()
rect_dirty_spot = square_dirty_spot.get_rect()

show_dirt = False

def dirtyspot1(imagex,imagey))

while running:

    rects = []
    if rects != []:
        pygame.display.update(rects)        

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_r:
                running = False
            
            if event.key == pygame.K_d:
                show_dirt = not show_dirt
                
            if event.key == pygame.K_UP:
                rect_dirty_spot.y -= 5
            
            if event.key == pygame.K_DOWN:
                rect_dirty_spot.y += 5
                
            if event.key == pygame.K_RIGHT:
                rect_dirty_spot.x += 5
            
            if event.key == pygame.K_LEFT:
                rect_dirty_spot.x -= 5
                
    gameDisplay.blit(background_resized,0))

    if show_dirt:
        gameDisplay.blit(dirty_spot_resized,rect_dirty_spot)
        
    pygame.display.update() 
        
    clock.tick(5)
    count += 1

pygame.quit()
quit()