Question

我只是搞乱了Pygame而且我无法看到我做错了什么让红色圆圈用箭头键移动。我无法判断它是否在我的主循环中。我也无法通过Pygame找到关于sprite或循环动画的很多教程。例如，如果我想制作一个方形振荡，例如移动平台，我该怎么做？



import pygame
import time

## event handling varibles
player_x = 0
player_y = 0
x = 250
y = 250


## screen display
display_width = 500
display_height = 500
pygame.init()
game_screen = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("test")

# player
def player():
    pygame.draw.circle(game_screen,red,(x,y),15)


# colors
white = (255,255,255)
red = (255,0,0)
black = (0,0,0)

### main loop

dead = False
while dead != True:
     for event in pygame.event.get():
         if event.type == pygame.QUIT:
            dead = True
            if event.type == pygame.KEYDOWN:
             if event.key == pygame.K_LEFT:
                player_x = -1
            elif event.key == pygame.K_RIGHT:
                player_x = +1
            if event.key == pygame.K_UP:
                player_y = +1
            elif event.key == pygame.K_DOWN:
                 player_y = -1
            if event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or pygame.K_RIGHT:
                    player_x = 0
            if event.key == pygame.K_UP or pygame.K_DOWN:
                    player_y = 0

     game_screen.fill(black)
     player()
     pygame.display.update()
     x -= player_x
     y -= player_y


pygame.quit()
quit()

Answer 1

你的压抑都搞砸了。

除非事件是QUIT，否则您的代码将无法执行任何操作...然后退出。

您的布尔逻辑错误。

这不是正确的语法event.key == pygame.K_UP or pygame.K_DOWN。此处的优先顺序如下(event.key == pygame.K_UP) or (K_DOWN)。由于K_DOWN是真实的，它总是正确的，因此整个陈述总是正确的。

我认为你的意思是：event.key == pygame.K_UP or event.key == pygame.K_DOWN

最后，它不会＆＃39;按照你的意愿继续前进。

只有在队列中有事件时才会移动。您可以通过生成事件使其继续移动。也许有一个事件计时器。

这是一个固定版本，希望这会有所帮助：

import pygame
import time

## event handling varibles
player_x = 0
player_y = 0
x = 250
y = 250

## screen display
display_width = 500
display_height = 500
pygame.init()
game_screen = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("test")

# player
def player(game_screen, red, point):   # Use parameters not globals
    pygame.draw.circle(game_screen, red, point, 15)

# colors
white = (255,255,255)
red = (255,0,0)
black = (0,0,0)

### main loop
pygame.time.set_timer(pygame.USEREVENT, 1)  # 1 per second

dead = False
while not dead:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            dead = True
        elif event.type == pygame.USEREVENT:
            pygame.time.set_timer(pygame.USEREVENT, 1)  # Set another timer for another 1 second

        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                player_x = +10
            elif event.key == pygame.K_RIGHT:
                player_x = -10
            elif event.key == pygame.K_UP:
                player_y = +10
            elif event.key == pygame.K_DOWN:
                player_y = -10
        elif event.type == pygame.KEYUP:
            if event.key in [pygame.K_LEFT, pygame.K_RIGHT]:
                player_x = 0
            elif event.key in [pygame.K_UP, pygame.K_DOWN]:
                player_y = 0
        game_screen.fill(black)
        player(game_screen,red,(x,y))
        pygame.display.update()
        x -= player_x
        y -= player_y

pygame.quit()

无法弄清楚为什么我的图像不会在pygame中移动

1 个答案: