我只是用python和pygame库编写一个小游戏。 该游戏的想法是在地板上绕着一个小笨蛋，以免撞到掉落的矩形。 一切都从游戏逻辑方面解决。 但是游戏开始时我仍然有问题：
当我根据播放器的方向水平翻转播放器时，我必须根据按下的键分配2张图像。现在，每次我启动游戏且尚未按下任何键时，只有一个“隐藏/透明” pygame.Surface（）对象，因为我需要它作为占位符，一旦按下一个键（左键或左键，有条件地分配这两个图像）右）。因此，游戏开始了，当没有按任何键时，没有玩家出现...
我的问题：如何在实际按下任何键之前没有隐藏透明的Surface对象的情况下添加默认（第3张）图像。我用Surface.blit（）或gameDisplay.blit（）尝试了很多事情，从而加载了另一张图像，但到目前为止，它还没有出现：（...
我认为这是一个愚蠢的问题，但我无法自己解决（+ Google）。
预先感谢
我的代码：
import pygame
import time
import random
pygame.init()
display_width = 800
display_height = 600
black = (0,0,0)
white = (255, 255, 255)
red = (200, 0,0 )
green = (0, 200, 0)
blue = (0,0, 255)
bright_red = (255, 0,0 )
bright_green = (0, 255, 0)
player_width = 100
player_height = 238
pause = False
gameDisplay = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption('Gesi Run of her Life <3')
clock = pygame.time.Clock()
gesImg_left = pygame.image.load('yourimage.png')
gesImg_right = pygame.transform.flip(gesImg_left, True, False)
background = pygame.image.load('yourbackground.jpg')
def things(thingx, thingy, thingw, thingh, color):
pygame.draw.rect(gameDisplay, color, [thingx, thingy, thingw, thingh])
def ges(player_img, x,y):
gameDisplay.blit(player_img, (x,y))
def text_objects(text, font, col):
textSurface = font.render(text, True, col)
return textSurface, textSurface.get_rect()
def message_display(text, col):
largeText = pygame.font.Font('freesansbold.ttf', 50)
TextSurf, TextRect = text_objects(text, largeText, col)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
pygame.display.update()
time.sleep(2)
game_loop()
def crash():
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
#gameDisplay.fill(white)
largeText = pygame.font.Font('freesansbold.ttf', 60)
TextSurf, TextRect = text_objects("A star was born!", largeText, black)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
button("Nochmal", 150, 450, 100, 50, green, bright_green, "play")
button("quit", 550, 450, 100, 50, red, bright_red, "quit")
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()
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:
if action == "play":
game_loop()
elif action == "quit":
pygame.quit()
quit()
elif action == "unpause":
global pause
pygame.mixer.music.unpause()
pause = False
else:
pygame.draw.rect(gameDisplay, ic, (x, y, w, h))
smallText = pygame.font.Font('freesansbold.ttf', 20)
TextSurf, TextRect = text_objects(msg, smallText, black)
TextRect.center = ((x+(w/2)),(y +(h/2)))
gameDisplay.blit(TextSurf, TextRect)
def paused():
pygame.mixer.music.pause()
while pause:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
#gameDisplay.fill(white)
largeText = pygame.font.Font('freesansbold.ttf', 60)
TextSurf, TextRect = text_objects("Paused", largeText, black)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
button("Continue", 150, 450, 100, 50, green, bright_green, "unpause")
button("quit", 550, 450, 100, 50, red, bright_red, "quit")
pygame.display.update()
clock.tick(15)
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', 60)
TextSurf, TextRect = text_objects("Gesi Super F/Run Game", largeText, black)
TextRect.center = ((display_width/2), (display_height/2))
gameDisplay.blit(TextSurf, TextRect)
button("let's go", 150, 450, 100, 50, green, bright_green, "play")
button("quit", 550, 450, 100, 50, red, bright_red, "quit")
pygame.display.update()
clock.tick(15)
def game_loop():
global pause
x = (display_width * 0.45)
y = (display_height * 0.6)
x_change = 0
thing_startx = random.randrange(0, display_width)
thing_starty = -600
thing_speed = 4
thing_width = 100
thing_height = 100
r = random.randint(0,255)
g = random.randint(0,255)
b = random.randint(0,255)
color = (r, g, b)
#player = pygame.Surface((x*0,y*0))
player = pygame.Surface((x,y), pygame.SRCALPHA, 32)
#player = pygame.Surface([x,y], pygame.SRCALPHA, 32)
player = player.convert_alpha()
#pygame.display.update()
gameExit = False
# game loop: the logic that happens if you not quit OR crash
while not gameExit:
for event in pygame.event.get(): # list of events per frame per secend (clicking etc.)
# ask if user asks to quit
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
if bonus > 0:
x_change = -5*bonus
else:
x_change = -5
player = gesImg_left
if event.key == pygame.K_RIGHT:
if bonus > 0:
x_change = 5*bonus
else:
x_change = 5
player = gesImg_right
if event.key == pygame.K_p:
pause = True
paused()
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
x_change = 0
elif event.key == pygame.K_RIGHT:
x_change = 0
player = gesImg_right
#print(event) # see all the interaction on the screen printed out on the terminal console
x = x + x_change
player_img = player
gameDisplay.blit(background,(0,0))
if dodged == 10 or dodged == 20 or dodged == 30:
r = random.randint(0,255)
g = random.randint(0,255)
b = random.randint(0,255)
color = (r, g, b)
things(thing_startx, thing_starty, thing_width, thing_height, color)
thing_starty = thing_starty + thing_speed + random.randrange(-1,1)
ges(player_img, x,y)
things_dodged(dodged)
if x > display_width-player_width or x < 0:
crash()
if thing_starty > display_height:
thing_starty = 0 - thing_height
thing_startx = random.randrange(0, display_width)
r = random.randint(0,255)
g = random.randint(0,255)
b = random.randint(0,255)
color = (r, g, b)
dodged = dodged + 1
# managing the speed
if dodged >= 17:
thing_speed += random.uniform(-0.8,0.2)
if dodged >= 27:
thing_speed += random.uniform(0.8,1)
if dodged >= 40:
thing_speed += random.uniform(0.4,1.5)
else:
thing_speed += random.uniform(-0.4,0.9)
# managing the width
if dodged >= 19:
thing_width += (dodged * random.uniform(-0.7,0))
if dodged >= 35:
thing_width += (dodged * random.uniform(0,1.1))
if dodged >= 45:
thing_width += (dodged * random.uniform(0,1.6))
else:
thing_width += (dodged * random.uniform(0.8,2))
#managing the level ups
if dodged == 10:
pygame.mixer.Sound.play(level_up)
bonus = 1.5
if dodged == 20:
pygame.mixer.Sound.play(level_up)
bonus = 2
if dodged == 30:
pygame.mixer.Sound.play(level_up)
bonus = 2.4
if dodged == 35:
pygame.mixer.Sound.play(level_up)
bonus = 2.8
# crash condition and calling the crash() function once the crash happened
if y + 38 < thing_starty + thing_height and (y + player_height)-15 > thing_starty + thing_height:
if x>thing_startx and x<thing_startx+thing_width or x+player_width>thing_startx and x+player_width<thing_startx+thing_width:
crash()
pygame.display.update()
#fps, running through the loop at a certain pace
clock.tick(60)
game_intro()
game_loop()
pygame.quit()
quit()
答案 0 :(得分：1)
在程序启动时只需将ges曲面之一分配给player即可，而不是创建透明的占位符曲面。
player = pygame.Surface((x,y), pygame.SRCALPHA, 32)
player = player.convert_alpha()
# Replace the lines above with this one.
player = gesImg_left