pygame中的屏幕不刷新[重复]

Question

所以我是 python 新手，我正在编写代码。该代码应该使螺旋计移动，并且我几乎完成了最后一步，但是当我运行它时，即使我通过打印出坐标确定圆圈正在移动，屏幕也不会刷新。我真的不知道发生了什么，因为我确定我拼写正确。有什么帮助吗？

import pygame
import math
import sys
import time
#setting colors
WHITE = (255, 255, 255)
BLUE = (0, 0, 255)
GREEN = (0, 255,  0)
RED = (255, 0, 0)
ORANGE = (255, 127, 0)
YELLOW = (255, 255, 0)
PURPLE = (160, 32, 240)
#setting what order the colors go in
listCircleColor = (RED, BLUE, GREEN, ORANGE, YELLOW, PURPLE, WHITE)
#how many circles per color
intGroup = 5
#the space between each circle
turnangle = 360/35
#width of screen
width = 600
#height of screen
height = 600
#radius of circles
radius = 100
#making the screen
screen = pygame.display.set_mode((width, height))
#if the code is running, then continue
running = True
##.draw.circle(screen, BLUE, (0, 0), radius, width=2)
circles = []

#draw
alpha = turnangle
for i in range(intGroup):
    for cl in listCircleColor:
        surfacetemp = pygame.Surface((width, height))

        ##circlerect = pygame.rect
        if alpha > 0 and alpha < 90:
            circlerect = pygame.draw.circle(surfacetemp, cl, (300 + radius * math.cos(math.radians(alpha)), 300 + radius * math.sin(math.radians(alpha))), radius, width=2)
            # second quarter of circles
        if alpha > 90 and alpha < 180:
            circlerect = pygame.draw.circle(surfacetemp, cl, (300 - radius * math.cos(math.radians(180 - alpha)), 300 + radius * math.sin(math.radians(180 - alpha))), radius, width=2)
            # third quarter of circles
        if alpha > 180 and alpha < 270:
            circlerect = pygame.draw.circle(surfacetemp, cl, (300 - radius * math.cos(math.radians(270 - alpha)), 300 - radius * math.sin(math.radians(270 - alpha))), radius, width=2)
            # last quarter of circles
        if alpha > 270 and alpha < 360:
            circlerect = pygame.draw.circle(surfacetemp, cl, (300 + radius * math.cos(math.radians(360 - alpha)), 300 - radius * math.sin(math.radians(360 - alpha))), radius, width=2)

        alpha = alpha + turnangle
        ##circles.append(circlerect)
        circles.append(surfacetemp)

#move"

#exit only when user clicks on exit button
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()


    for crect in circles:
        ret = crect.get_rect()
        ret.right += 5
        ret.left += 5

        screen.blit(screen, ret)

    ##screen.blit(crect,crect)
    pygame.time.Clock().tick(20)
     pygame.display.update()

##for center, color in circles:
##    pygame.draw.circle(screen, color, center, radius, 2)
##pygame.display.flip()

Answer 1

有很多代码有错误的缩进：

if alpha > 0 and alpha < 90:
            circlerect = pygame.draw.circle(screen, cl, (300 + radius * 
math.cos(math.radians(alpha)), 300 + radius * math.sin(math.radians(alpha))), radius, width=2)

和

if alpha > 90 and alpha < 180:
            circlerect = pygame.draw.circle(screen, cl, (300 - radius * 
math.cos(math.radians(180 - alpha)), 300 + radius * math.sin(math.radians(180 - alpha))), 
radius, width=2)

和

if alpha > 180 and alpha < 270:
        circlerect = pygame.draw.circle(screen, cl, (300 - radius * math.cos(math.radians(270 - alpha)), 300 - radius * math.sin(math.radians(270 - alpha))), radius, width=2)
    # last quarter of circles
if alpha > 270 and alpha < 360:
    circlerect = pygame.draw.circle(screen, cl, (300 + radius * math.cos(math.radians(360 - alpha)), 300 - radius * math.sin(math.radians(360 - alpha))), radius, width=2)

和

if event.type == pygame.QUIT:
    pygame.quit()
    exit()

修复这些部分的缩进，以便我们可以看到问题所在。

Answer 2

代码中有很多问题，主要是缩进，正如Dhrumil Dave 所提到的，但是要修复显示不更新的问题，这是您需要做的。而不是这个

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

"for circle in circles:"
"print(circle[0][0])"
"print(circle[0][1])"
"time.sleep(50)"
"circle[0][0] += 1"

for crect in circles:
    crect.right += 20

   ## screen.fill(0)
    ##for center, color in circles:
    ##    pygame.draw.circle(screen, color, center, radius, 2)
    ##pygame.display.flip()
    pygame.display.update()

您需要将pygame.display.update() 移动到while running 循环内，像这样

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
        pygame.quit()
        exit()
    pygame.display.update()

我也会考虑实现一个时钟来标准化帧速率，就像这样......

FPS = 60
clock = pygame.time.Clock()
running = True
while running:
    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
        pygame.quit()
        exit()
    pygame.display.update()

如果你这样做，游戏每秒只会更新 60 次（while 循环每秒只会运行 60 次）。这将使许多动作的速度标准化，并在游戏更加完整时提供显着帮助。您还可以查看称为 delta time 的内容，您可以了解如何操作 here。