Pygame Sprite未立即更新
Pygame Sprite未立即更新
提问于 2017-01-30 04:32:48
编辑:我已经修复了它，应该有一个自己的前面的返回invader_position_x
我在做一个太空入侵者游戏。然而，我遇到了一些奇怪的行为。
当我按键盘上的右键时，精灵不会移动，但在按住它几秒钟后，它会跳到右边界。
太空入侵者游戏使用的是类，这是主类：
# IMPORTS
import pygame, sys
from pygame.locals import *
import invader
pygame.init()
###################
#IMAGE SIZE AND FPS
width = 800
height = 600
fps = 30
fpsClock = pygame.time.Clock()
DISPLAY = pygame.display.set_mode((width,height))
#################
#OTHER VARIABLES
pygame.display.set_caption('space invaders!')
white = (225,225,225)# The colour white
invader_sprite = pygame.image.load("cross.png")
invader_lenght = 40
invader_position_x = 400
invader_position_y = 560
right_boundary = width- invader_lenght
keypress = ""
my_invader = invader.Invader(invader_position_x,right_boundary,keypress)# Initialising invader
while True: # main game loop
DISPLAY.fill(white)
DISPLAY.blit(invader_sprite,(invader_position_x,invader_position_y))
keypress = pygame.key.get_pressed()
invader_position_x=my_invader.invader_move(keypress,right_boundary,invader_position_x)
print(invader_position_x)
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
pygame.display.update()
fpsClock.tick(fps)这是我在一个单独的文件中的侵略者类：
import pygame, sys
from pygame.locals import *
pygame.init()
class Invader():
def __init__(self,invader_position_x,right_boundary,keypress):
self.invader_position_x= invader_position_x
self.right_boundary=right_boundary
self.keypress= keypress
def invader_move(self,keypress,right_boundary,invader_position_x):
if self.invader_position_x> right_boundary:#Right boundary
invader_position_x=right_boundary-5
if self.invader_position_x<0:
invader_position_x= 5
if keypress[K_RIGHT]:# right
self.invader_position_x = self.invader_position_x+ 5
elif keypress[K_LEFT]:# left
self.invader_position_x =self.invader_position_x- 5
return invader_position_x那么修复这种奇怪行为的解决方案是什么呢？
Stack Overflow用户
回答已采纳
发布于 2017-01-30 07:19:13
我认为问题是你有两个变量来保持位置。但我没有检查这一点--我修改了代码，使其更有条理，问题也消失了。
#!/usr/bin/env python3
import pygame
# --- constants ---
WIDTH = 800
HEIGHT = 600
FPS = 30
WHITE = (225, 225, 225)
# --- classes ---
class Invader():
def __init__(self, x, y):
self.image = pygame.image.load("cross.png")
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
def draw(self, screen):
screen.blit(self.image, self.rect)
def update(self, screen_rect, keypress):#EDIT Replaced screen with screem_rect
if keypress[pygame.K_RIGHT]: # right
self.rect.x += 15
elif keypress[pygame.K_LEFT]: # left
self.rect.x -= 15
if self.rect.right > screen_rect.right: # right boundary
self.rect.right = screen_rect.right
if self.rect.left < screen_rect.left:
self.rect.left = screen_rect.left
# --- main ---
# - init -
pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
screen_rect = screen.get_rect()
pygame.display.set_caption('space invaders!')
# - objects -
my_invader = Invader(400, 560)
# - mainloop -
fps_clock = pygame.time.Clock()
while True: # main game loop
# - events -
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
keypress = pygame.key.get_pressed()
# - updates -
my_invader.update(screen_rect, keypress)
# - draws -
screen.fill(WHITE)
my_invader.draw(screen)
pygame.display.update()
# - FPS -
fps_clock.tick(FPS)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/41925629
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