Pygame问题：我的玩家图像无法移动

Question

我正在用python创建一个带有滚动背景的游戏，但我无法让我的玩家移动。只是为了让您知道，我们不允许使用类或精灵

def game():
running = True
backgrounX = 0
button = 0
movex = 0
movey = 0
player = image.load("images/player.gif")
def drawscene(screen,button,backx):             
screen.fill((0, 0 , 0))
background = image.load("images/bc3.png") # Load image
bc = transform.scale(background, (1000, 700)) # Scale the image
screen.blit(bc, [backx, 0]) # To show image
screen.blit(bc, [backx + 1000, 0]) # For background to move
button_1 = Rect(0, 0, 100, 70)
draw.rect(screen, (0, 85, 255), button_1)
draw_text("Exit", font, (0, 0, 0), screen, 25, 25)  

for e in event.get():
if e.type == MOUSEBUTTONDOWN:
if e.button == 1:
main_menu()     
# Game loop
while running:
for e in event.get():
if e.type == QUIT:
quit()
sys.exit()
running = False
if e.type == KEYDOWN:
if e.key == K_LEFT or e.key == ord('a'):
movex = -1
if e.key == K_RIGHT or e.key == ord('d'):
movex = +1
if e.key == K_UP or e.key == ord('w'):
movey = -1
if e.type == KEYUP:
if e.key == K_LEFT or e.key == ord('a') or e.key == K_RIGHT or e.key == ord('d'):
movex = 0
if e.key == K_UP or e.key == ord('w'):
movey = 0
x += movex
y += movey

drawscene(screen, button, backgrounX)
screen.blit(player (movex, movey))
myClock.tick(60)
backgrounX -= 3 # background scroller speed
display.update()

这是我到目前为止尝试过的，并且显示一个错误，说第 40 行的"赋值前引用了局部变量'x'"。有谁知道让我的玩家移动的其他方法吗？

Answer 1

玩家的位置是(x，y(而不是(movex，movey(。此外，参数列表中缺少一个"，"：

screen.blit(player (movex, movey))

screen.blit(player, (x, y))

当然，您必须在应用程序循环之前的某个地方定义x和y：

x = 0
y = 0
while running:
# [...]
x += movex
y += movey
# [...]
screen.blit(player, (x, y))