Pygame 没有响应变量更新

Question

我正在尝试构建一个程序，将 Pygame 表面中的每个单独像素更改为随机颜色。

对于固定且恒定的表面尺寸（例如 1300 x 700），这可以工作，并且整个表面都充满了随机颜色，但是我正在尝试使用 Pygame 的 pygame.RESIZABLE 特性动态调整表面的大小（通过更新程序工作的计算 X 和 Y 值），但是每次调整表面大小时，Pygame 表面仅输出程序初始表面宽度和高度（在本例中为 1300 x 700）内的像素的随机颜色像素并且表面的其余部分保持黑色（我设置的默认背景颜色），即使当我将响应屏幕高度和宽度的变量（并用于迭代所有像素）打印到程序日志时，它们按预期更新。

我不明白表面如何不响应这些更新的变量，我不知道如何解决这个问题。

非常感谢任何帮助，欢迎对我的代码提出任何问题，谢谢！

import pygame
import random
pygame.init() #initiates pygame

Comp_X = 1300
Comp_Y = 700

Window = pygame.display.set_mode((Comp_X, Comp_Y), pygame.RESIZABLE) #defines the window size (the varible doesnt have to be called window)
pygame.display.set_caption("Random Colours") #sets the title of the window
clock = pygame.time.Clock() #sets the refresh rate of the program



def GameLoop():    
    global Comp_X #computed pixles for the X axis
    global Comp_Y #computed pixles for the Y axis
    Comp_Tot = Comp_X * Comp_Y #total pixles on the screen
    print("initial computed total pixles = " + str(Comp_Tot))

    #setting x and y position
    x = 0
    y = 0


    GameExit = False #sets the defult value of this varible to true

    while not GameExit: #this is effectivly a "while true" loop, unless the varible "crashed" is set to false

        for event in pygame.event.get(): #this for loop will listen for events
            print(event.type)
            print("X = " + str(Comp_X))
            print("Y = " + str(Comp_Y))

            if event.type == pygame.QUIT: # this if statement checks to see if the X in the top right of the window was pressed
                GameExit = True # this will break the while loop if the condition is met
                print("X = " + str(Comp_X))
                print("Y = " + str(Comp_Y))

            if event.type == 16: #event type 16 is the window resizing event
                Comp_X = event.dict['size'][0]
                Comp_Y = event.dict['size'][1]
                Comp_Tot = Comp_X * Comp_Y
                print("current computed total pixles = " + str(Comp_Tot))

            #Creating the colours
            if event.type == pygame.KEYDOWN:

                if event.key == pygame.K_RETURN:

                    for pixle in range (0, Comp_Tot):
                        if x == Comp_X:
                            print("Computed X = " + str(Comp_X))
                            print("Computed Y = " + str(Comp_Y))
                            x = 0
                            y += 1
                        pygame.draw.rect(Window, (random.randint(0,255), random.randint(0,255), random.randint(0,255)), [x, y, 2, 2])# draws a red square
                        x += 1


        #Drawing the frame
        pygame.display.update() #This updates the frame
        clock.tick(60) # this defines the FPS



GameLoop()
pygame.quit() # this will close the window if the "while GameLoop" loop stops running
quit()

Using defult height and width of 1300 x 700

Resizing surface to 1457 x 992 - not all of the surface is filled!

Answer 1

导致错误的代码实际上有两个问题。第一个是没有

Window = pygame.display.set_mode((Comp_X, Comp_Y), pygame.RESIZABLE)

如前所述，if event.type == 16: 内的行。

另一个问题非常小，但如果在填充屏幕一次后调​​整大小会导致它无法正常工作，也就是说，在填充屏幕后您永远不会将 x 或 y 的值重置回 0。

固定部分代码：

            if event.type == pygame.VIDEORESIZE: 
                Comp_X = event.w
                Comp_Y = event.h
                Comp_Tot = Comp_X * Comp_Y
                print("current computed total pixles = " + str(Comp_Tot))
                Window = pygame.display.set_mode((Comp_X, Comp_Y), pygame.RESIZABLE)

            #Creating the colours
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_RETURN:
                    for pixle in range (0, Comp_Tot):
                        if x == Comp_X:
                            #print("Computed X = " + str(Comp_X))
                            #print("Computed Y = " + str(Comp_Y))
                            x = 0
                            y += 1
                        pygame.draw.rect(Window, (random.randint(0,255), random.randint(0,255), random.randint(0,255)), [x, y, 2, 2])# draws a red square
                        x += 1
                    x = 0
                    y = 0

我还将event.type == 16 更改为event.type == pygame.VIDEORESIZE，因为它更具可读性。

Answer 2

当窗口调整大小事件触发时，您需要再次调用pygame.display.set_mode((w, h)) 以分配该大小的新表面。否则，您仍在写入原始 1300x700 Surface 实例。