我正在创建一个简单的程序,它显示一个背景图像并动画一个只有3帧的简单精灵。每次我运行它,它都会给我错误
screen.blit(firstexp [currentimage],(xpos,ypos))IndexError:list 指数超出范围
我现在已经使用了一段时间了,我不知道该怎么做了。任何帮助将不胜感激,这是我的代码:
import pygame, sys, random
from pygame.locals import *
pygame.init()
class Cat(pygame.sprite.Sprite):
animationArray = []
numframes = 0
currentframe = 0
anispeed = 0
lastdraw = 0
xspeed = 5
xpos = 10
ypos = 10
def __init__(self, imgname, startx, starty, w, h, numframes, anispeed):
pygame.sprite.Sprite.__init__(self)
spsheet = pygame.image.load(imgname)
f1 = spsheet.subsurface(0,0,120,60)
self.animationArray.append(f1)
f2 = spsheet.subsurface(0,60,120,60)
self.animationArray.append(f2)
f3 = spsheet.subsurface(0,120,120,60)
self.animationArray.append(f3)
self.numframes = 3
self.currentframe = 0
self.anispeed = anispeed
def update(self, secs):
self.xpos = self.xpos + self.xspeed
self.lastdraw = self.lastdraw+secs
if self.lastdraw self.anispeed:
self.currentframe = self.currentframe+1
if self.currentframe==2:
self.currentframe=0
self.lastdraw = 0
self.image = self.animationArray[self.currentframe]
self.rect = (self.xpos,0,0,120,180)
def setEnv(background):
clock = pygame.time.Clock()
backimage = pygame.image.load(background)
w = backimage.get_rect().w
h = backimage.get_rect().h
screen = pygame.display.set_mode((w,h))
return clock, backimage, screen
###main game code
clock, backimage, screen = setEnv("landscape-illustration.jpg")
allSprites = pygame.sprite.Group() collSprites = pygame.sprite.Group()
catx = Cat("runningcat.png", 0,0,120,180,3,1)
allSprites.add(catx)
collSprites.add(catx)
screen.blit(backimage,(0,0))
while True:
secs = clock.tick(30)/1000
for event in pygame.event.get():
if event.type==pygame.QUIT:
sys.exit()
allSprites.clear(screen, backimage)
allSprites.update(secs)
allSprites.draw(screen)
collSprites.draw(screen)
pygame.display.flip()
答案 0 :(得分:0)
您需要更改Cat类的update()
方法。尝试这样的事情:
def update(self, secs):
self.xpos += self.xspeed
self.lastdraw += secs
if self.lastdraw > self.anispeed:
self.currentframe = (self.currentframe+1) % 3
self.lastdraw = 0
self.image = self.animationArray[self.currentframe]
self.rect = (self.xpos,0,0,120,180)
如果您想知道代码有什么问题,可以打印cat.currentframe
的值。