python - 为什么我的正方形（蛇）只在对角线上移动？

问题描述

我正在编写 2 条蛇/汽车，而我的第一条蛇/汽车使用 WASD 键盘格式，运行良好。但是我的第二条蛇/汽车，它使用箭头键，只是沿对角线移动。我希望两条蛇/汽车都向各个方向移动（上、下、左、右和对角线），但现在，第二条蛇/汽车只对角线移动。

    #initialize variables for player 1
    car1x = 250
    car1y = 300
    car1width = 20
    car1height = 20
    car1dx = 0
    car1dy = 0
    speed = 3

    #initialize variables for player 2
    car2x = 500
    car2y = 300
    car2width = 20
    car2height = 20
    car2dx = 0
    car2dy = 0
    speed = 3

    screen.fill(WHITE)

    # set main loop to True so it will run
    main = True

    # main loop
    while main:
        for event in pygame.event.get(): # check for any events (i.e key press, mouse click etc.)
            if event.type ==pygame.QUIT: # check to see if it was "x" at top right of screen
                main = False         # set the "main" variable to False to exit while loop
            if event.type ==pygame.KEYDOWN:
                if event.key == pygame.K_w:
                    car1dx = 0
                    car1dy = -speed
                elif event.key == pygame.K_s:
                    car1dx = 0
                    car1dy = speed
                elif event.key == pygame.K_a:     
                    car1dx = -speed                     
                    car1dy = 0                          
                elif event.key == pygame.K_d:
                    car1dx = speed
                    car1dy = 0


                if event.key == pygame.K_UP:
                    car2dx = 0
                    car2dy = -speed
                elif event.key == pygame.K_DOWN:
                    car2dx = 0
                    car2dy = speed
                elif event.key == pygame.K_LEFT:     
                    car2dx = -speed                     
                    car2dy = 0                          
                elif event.key == pygame.K_RIGHT:
                    car2dx = speed
                    car2dy = 0

                elif event.key == pygame.K_q:
                    pygame.quit()

            if event.type == pygame.KEYUP:
                if event.key in (pygame.K_w, pygame.K_s):
                    car1dx = 0
                elif event.key in (pygame.K_a, pygame.K_d):
                    car1dy = 0

                if event.key in (pygame.K_UP, pygame.K_DOWN):
                    car1dx = 0
                elif event.key in (pygame.K_LEFT, pygame.K_RIGHT):
                    car1dy = 0

# move the x and y positions of the player
            oldcar1x = car1x
            oldcar1y = car1y

            oldcar2x = car2x
            oldcar2y = car2y

            car1x = car1x + car1dx
            car1y = car1y + car1dy

            car2x = car2x + car2dx
            car2y = car2y + car2dx

            if car1x >= screenwidth:
                car1x = oldcar1x
                car1y = oldcar1y

            if car2x >= screenwidth:
                car2x = oldcar2x
                car2y = oldcar2y

          ```

标签： pythonpygamekeydownkeyup

python - 为什么我的正方形（蛇）只在对角线上移动？

问题描述

解决方案

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