我是 Pygame 新手，仍在学习 Python。我正在使用Python 3.4。 我遵循了这个令人惊叹的游戏创建教程:http://pythonprogramming.net/pygame-python-3-part-1-intro/ 。完成类(class)后，我决定稍微改变一下游戏，并成功地添加了更多 Action 并修复了一些错误。然而现在我试图弄清楚当我按下箭头键时如何改变 Sprite ，使它看起来像倾斜的。
我有一个名为 racecar.png (这是飞机)和 move_right.png (看起来像是倾斜的)的文件。我的最终目标是当我按下右箭头时，会显示 move_right.png ，直到我松开按键，在这种情况下它会返回 racecar.png。我查过如何使用 Sprite 表，但失败了，如何制作动画，观看了 YouTube，谷歌搜索了我的问题，但我找不到其他有此问题的人。我发现的大部分内容都涉及在屏幕上移动 Sprite 。
这是代码:
import pygame
import random
import time
pygame.init()
car_width = 100
car_height = 100
display_width = 800
display_height = 600
gameDisplay = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption('A Macross Simumater')
black = (0,0,0)
white = (255, 255, 255)
red = (255, 0,0)
green = (0,255,0)
greent = (0, 150, 0)
blue = (0,0, 200)
dark_blue = (0, 0, 50)
clock = pygame.time.Clock()
carImp = pygame.image.load('racecar.png')
gameIcon = pygame.image.load('caricon.png')
#background = pygame.image.load('background.png')
pygame.display.set_icon(gameIcon)
def quitgame():
pygame.quit()
quit()
def unpause():
global pause
pause = False
def paused():
largeText = pygame.font.SysFont("comicsansms",115)
TextSurf, TextRect = text_objects("Paused", largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
while pause:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
button("Continue",150,450,100,50,green,black,unpause)
button("Quit",550,450,100,50,red,black,quitgame)
pygame.display.update()
clock.tick(15)
def things_dodged(count):
font = pygame.font.SysFont(None, 25)
text = font.render("Dodged: " + str(count), True, black)
gameDisplay.blit(text, (0,0))
def things(thingx, thingy, thingw, thingh, color):
pygame.draw.rect(gameDisplay, color, [thingx, thingy, thingw, thingh])
def car(x, y):
gameDisplay.blit(carImp, (x, y))
def text_objects(text, font):
textSurface = font.render(text, True, black)
return textSurface, textSurface.get_rect()
def message_display(text):
largeText = pygame.font.Font('freesansbold.ttf', 115)
TextSurf, TextRect = text_objects(text, largeText)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
pygame.display.update()
time.sleep(2)
game_loop()
def crash():
largeText = pygame.font.SysFont("comicsansms",115, (0, 0, 0))
TextSurf, TextRect = text_objects("You Crashed", largeText)
TextRect.center = ((display_width/2),(display_height/2))
gameDisplay.blit(TextSurf, TextRect)
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
button("Play Again",150,450,100,50,green,black,game_loop)
button("Quit",550,450,100,50,red,black,quitgame)
pygame.display.update()
clock.tick(15)
def button(msg,x,y,w,h,ic,ac, action = None):
mouse = pygame.mouse.get_pos()
click = pygame.mouse.get_pressed()
print(click)
if x+w > mouse[0] > x and y+h > mouse[1] > y:
pygame.draw.rect(gameDisplay, ac,(x, y, w, h))
if click[0] == 1 and action != None:
action()
else:
pygame.draw.rect(gameDisplay, ic, (x, y, w, h))
smallText = pygame.font.Font('freesansbold.ttf', 21)
textSurf, textRect = text_objects("GO!", smallText)
textRect.center = ((150+(100/2)), (450+(50/2)))
gameDisplay.blit(textSurf, textRect)
textSurf, textRect = text_objects("QUIT!", smallText)
textRect.center = ((550+(100/2)), (450+(50/2)))
gameDisplay.blit(textSurf, textRect)
def game_intro():
intro = True
while intro:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
gameDisplay.fill(white)
largeText = pygame.font.Font('freesansbold.ttf', 115)
TextSurf, TextRect = text_objects('Macross',largeText)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
mouse = pygame.mouse.get_pos()
button("GO!", 150, 450, 100, 50, green, black, game_loop)
button("Quit", 550,450,100,50, red, black, quitgame)
pygame.display.update()
clock.tick(15)
def game_loop():
global pause
pygame.mixer.music.load('Macross Plus - Voices HQ MV Karaoke Instrumental Japanese.mp3')
pygame.mixer.music.play(-1)
x = (display_width * 0.45)
y = (display_height * 0.8)
global x_change
global y_change
x_change = 0
y_change = 0
pause = False
dodged = 0
thing_startx = random.randrange(0, display_width)
thing_starty = -600
thing_speed = 4
thing_width = 50
thing_height = 50
thingt_startx = random.randrange(0, display_width)
thingt_starty = -600
thingt_speed = 7
thingt_width = 100
thingt_height = 100
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
x_change = 8
elif event.key == pygame.K_LEFT:
x_change = -8
elif event.key == pygame.K_p:
pause = True
paused()
elif event.key == pygame.K_UP:
y_change = -8
elif event.key == pygame.K_DOWN:
y_change = 8
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT or event.key == pygame.K_UP or event.key == pygame.K_DOWN:
x_change = 0
y_change = 0
x += x_change
y += y_change
gameDisplay.fill(dark_blue)
things(thing_startx, thing_starty, thing_width, thing_height, greent)
thing_starty += thing_speed
things(thingt_startx, thingt_starty, thingt_width, thingt_height, greent)
thingt_starty += thingt_speed
car(x, y)
if x > display_width - car_width or x < 0:
crash()
if y > display_width - car_width or y < 0:
y_change = 0
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0, display_width)
dodged += 1
thing_speed += 1
thing_width += (dodged * 1.2)
thing_height += (dodged * 2)
thingt_starty = 0 - thing_height
thingt_startx = random.randrange(0, display_width)
dodged += 1
thingt_speed += 1
thingt_width += (dodged * 1.2)
thingt_height += (dodged * 2)
if thing_starty < y:
if y < thing_starty+thing_height:
if x > thing_startx and x < thing_startx + thing_width or x + car_width > thing_startx and x + car_width < thing_startx + thing_width:
crash()
elif thing_starty > y:
print('passed')
if thingt_starty < y:
if y < thingt_starty+thingt_height:
if x > thingt_startx and x < thingt_startx + thingt_width or x + car_width > thingt_startx and x + car_width < thingt_startx + thingt_width:
crash()
elif thingt_starty > y:
print('PASSED')
things_dodged(dodged)
pygame.display.update()
clock.tick(60)
game_intro()
game_loop()
pygame.quit()
quit()
最佳答案
在每一帧，您都在此函数中名为 carImp 的全局变量中显示图像:
def car(x, y):
gameDisplay.blit(carImp, (x, y))
所以，您要做的就是在显示之前更改此变量的内容以指向所需的图像。 您应该首先读取汽车的所有图像 - 您可以将它们全部读入字典中，以避免每个 Sprite 的变量名称污染您的命名空间(甚至比被污染的还要严重):
所以，一开始，一些代码如下:
car_image_names = ["racecar", "move_right", "move_left"]
car_sprites = dict(((img_name, pygame.image.load(img_name + ".png"))
for img_name in car_image_names)
carImp = car_sprites["racecar"]
(这里我使用了一个名为“生成器表达式”的快捷方式，以避免为每个汽车图像编写“pygame.image.load”。)
然后，在主循环中，在读取键盘并检测到
无论汽车是向右还是向左移动(您在 x_change 中反射(reflect)) - 只需相应地更改 carImp 即可:
if x_change == 0:
carImp = car_sprites["racecar"]
elif x_change > 0:
carImp = car_sprites["move_right"]
elif x_change < 0:
carImp = car_sprites["move_left"]
关于python - 如何在pygame中按下按键后更改屏幕上的 Sprite ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30666653/