Python pygame 如何从玩家射击子弹

请试试这个。

当你按下空格键时，你发射了导弹。它被计算为mx_change = -100但是你第二次按下按钮，导弹从未发射过。

因为你忘记重写变量。

if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
    mx_change = 0
if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
    my_change = 0
if event.key == pygame.K_SPACE:
    mx_change = 0
    my_change = 0

当然，你可以改变mx_change& my_change，但是你通过missile函数传递。也就是说，导弹的位置是由mx&决定的my，如你所见。

所以我建议你写成如下。

mx = px
my = py

我为什么要设置这些点？

你的导弹是黑色的。而玩家也是黑人。导弹从玩家发射。这两个东西都是黑色的，所以很好。

如果您有任何问题，请通过评论问我。

import pygame #####IMPORTING PYGAME MODULE###########################

pygame.init() 
#####INITIALIZINGPYGAME##################################

gameWindow = pygame.display.set_mode((800,600)) ###Screen Width and Height###

clock = pygame.time.Clock() ## FRAMES PER SECOND ##

white = (255,255,255)
black = (0,0,0)


def player(px,py):
    pygame.draw.rect(gameWindow,black,[px,py,30,30])

def missile(mx,my):
    pygame.draw.rect(gameWindow,black,[mx,my,10,10])


def gameloop():

    px = 700
    py = 300

    mx = 700
    my = 300

    px_change = 0
    py_change = 0

    mx_change = 0
    my_change = 0

    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_LEFT:
                    mx_change = -10
                if event.key == pygame.K_RIGHT:
                    mx_change = 10
                if event.key == pygame.K_UP:
                    my_change = -10
                if event.key == pygame.K_DOWN:
                    my_change = 10

                if event.key == pygame.K_SPACE:
                    mx_change = -100


                if event.key == pygame.K_LEFT:
                    px_change = -10
                if event.key == pygame.K_RIGHT:
                    px_change = 10
                if event.key == pygame.K_UP:
                    py_change = -10
                if event.key == pygame.K_DOWN:
                    py_change = 10

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                    px_change = 0
                if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                    py_change = 0


                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                    mx_change = 0
                    mx = px
                if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                    my_change = 0
                    my = py
                if event.key == pygame.K_SPACE:
                    mx_change = 0
                    my_change = 0
                    mx = px
                    my = py

            px += px_change
            py += py_change

            mx += mx_change
            my += my_change

            gameWindow.fill(white)
            player(px,py)
            missile(mx,my)

            pygame.display.update()

            clock.tick(15)
gameloop()