Question

我正在在线观看一系列视频，以协助开发pygame项目。我无法让我的playerobject类在我的游戏中移动。一切都能正确编译，但是当我按向左，向右，向上，向下等按钮时，什么都不会发生。唯一起作用的是绘制对象和pygame退出事件。

我尝试过移动一些代码，但无济于事。

import os
import random
import time

#declarations
displaywidth = 600
displayheight = 850
gamedisplay = pygame.display.set_mode((displaywidth, displayheight))
fps = 60
white = (255, 255, 255)
black = (0, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
red = (255, 0, 0)

#initializations
pygame.init()
pygame.mixer.init()
pygame.display.set_caption("Into The Battlefield")
clock = pygame.time.Clock()


#classes
class playerobject(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface((50, 40))
        self.image.fill(green)
        self.rect = self.image.get_rect()
        self.rect.centerx = displaywidth / 2
        self.rect.bottom = displayheight - 10
        self.speedx = 0
        self.speedy = 0

def update(self):
    self.speedx = 0
    self.speedy = 0
    keypress = pygame.key.get_pressed()
    if keypress[pygame.K_LEFT]:
        self.speedx = -5
    if keypress[pygame.K_RIGHT]:
        self.speedx = 5
    if keypress[pygame.K_UP]:
        self.speedy = 5
    if keypress[pygame.K_DOWN]:
        self.speedy = -5
    self.rect.x += self.speedx
    self.rect.y += self.speedy

#sprite group
sprites = pygame.sprite.Group()
playerobject = playerobject()
sprites.add(playerobject)

#gameloop
def gameloop():
    gameon = True
    while gameon:
        clock.tick(fps)

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


        gamedisplay.fill(black)
        sprites.update()
        sprites.draw(gamedisplay)
        pygame.display.update()
        pygame.display.flip()


gameloop()
pygame.quit()

我只是想让我的绿色方块左右移动。

Answer 1

除非只是一个代码粘贴问题，否则看来playerobject类没有正确定义update()函数（因为它缺少足够的缩进以使其成为playerobject的一部分））。

代码中有一个样式问题，因为它处理playerobject和主循环中的用户输入。最好在主循环中（或至少在一个地方）处理所有用户输入。我重新安排了代码，使其具有这种行为。哦，您的上/下数字被颠倒了（可能是故意的）。

import os
import random
import time
import pygame

#declarations
displaywidth = 600
displayheight = 850
gamedisplay = pygame.display.set_mode((displaywidth, displayheight))
fps = 60
white = (255, 255, 255)
black = (0, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
red = (255, 0, 0)

#initializations
pygame.init()
pygame.mixer.init()
pygame.display.set_caption("Into The Battlefield")
clock = pygame.time.Clock()


#classes
class playerobject(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface((50, 40))
        self.image.fill(green)
        self.rect = self.image.get_rect()
        self.rect.centerx = displaywidth / 2
        self.rect.bottom = displayheight - 10
        self.speedx = 0
        self.speedy = 0

    def setSpeedXY( self, x, y ):
        self.speedx = x
        self.speedy = y

    def adjustSpeedX( self, x ):
        self.speedx += x
    def adjustSpeedY( self, y ):
        self.speedy += y

    def update(self):
        self.rect.x += self.speedx
        self.rect.y += self.speedy

#sprite group
sprites = pygame.sprite.Group()
playerobject = playerobject()
sprites.add(playerobject)

#gameloop
def gameloop():
    gameon = True
    while gameon:
        clock.tick(fps)

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

        keypress = pygame.key.get_pressed()
        if keypress[pygame.K_LEFT]:
            playerobject.adjustSpeedX( -5 )
        if keypress[pygame.K_RIGHT]:
            playerobject.adjustSpeedX( 5 )
        if keypress[pygame.K_UP]:
            playerobject.adjustSpeedY( -5 )
        if keypress[pygame.K_DOWN]:
            playerobject.adjustSpeedY( 5 )
        if keypress[pygame.K_SPACE]:
            playerobject.setSpeedXY( 0, 0 )

        gamedisplay.fill(black)
        sprites.update()
        sprites.draw(gamedisplay)
        pygame.display.update()
        pygame.display.flip()


gameloop()
pygame.quit()

现在它可以真正快速地移动。

我需要帮助让我的物体移动

1 个答案: