GRAV变量不工作？

Question

这个程序不起作用，我试着改变任何我认为错误的东西。我正在尝试简单地制作一个重力起作用的游戏，不知道是否需要更改所有内容，或者只需将两个引号改为两个撇号

from tkinter import *
HEIGHT = 500
WIDTH = 800
GRAV = 0
Q_PRESSED = False
# to make the window
window = Tk()
window.title("jumpy jump")
c = Canvas(window, width=WIDTH, height=HEIGHT, bg='white')
c.pack()
# to create the sprite
dude_id = c.create_rectangle(0, 30, 15, 100, outline='limegreen', 
fill='limegreen')
dude_id2 = c.create_rectangle(45, 30, 60, 100, outline='limegreen', 
fill='limegreen')
dude_id3 = c.create_oval(0, 0, 60, 60, outline='limegreen', 
fill='limegreen')
def is_collided_with(dude, floor):
    return self.rect.colliderect(dude.rect)
MID_X = WIDTH / 2
MID_Y = HEIGHT / 2
c.move(dude_id, MID_X, MID_Y)
c.move(dude_id2, MID_X, MID_Y)
c.move(dude_id3, MID_X, MID_Y)
floor_id = c.create_rectangle(0, 485, 800, 500, fill='black')
while Q_PRESSED != False:
    if not dude.is_collided_with(floor):
        GRAV =+ 1
        c.move(dude_id, 0, GRAV)
        c.move(dude_id2, 0, GRAV)
        c.move(dude_id3, 0, GRAV)
    if dude.is_collided_with(floor):
    GRAV =-2
    # to move
    def move_dude(event):
        if event.keysym == 'q':
            Q_PRESSED = True
        if event.keysym == 'Left':
            c.move(dude_id, -10, GRAV)
            c.move(dude_id2, -10, GRAV)
            c.move(dude_id3, -10, GRAV)
        if event.keysym == 'Right':
            c.move(dude_id, 10, GRAV)
            c.move(dude_id2, 10, GRAV)
            c.move(dude_id3, 10, GRAV)
    c.bind_all('<key>', move_dude)

我在一本书上得到了一些帮助，用于装订键的东西，但它是为孩子或初学者制作的，因为我对python非常陌生。任何帮助都是最好的！

Answer 1

我不相信这是一行修复，因为你的代码中有多个问题与tkinter有关，而不一定是你的重力问题：

<Key>

• move_dude()似乎是一个内部函数，用来避免声明artifact?

• c.bind_all('<key>', move_dude) global.

• There's不调用mainloop().

，

• 什么是self.rect.colliderect()，PyGame Q_PRESSED应该使用它

我对您的代码进行了最小限度的修改，以演示我认为您正在尝试实现的运动：

from tkinter import *

HEIGHT = 500
WIDTH = 800
GRAVITY = 0

def is_collided_with(dude, floor):
    return dude in c.find_overlapping(*c.bbox(floor))

def move_dude(event):
    global GRAVITY

    if is_collided_with(dude_id, floor_id):
        GRAVITY = 0
    else:
        GRAVITY += 1

    if event.keysym == 'q':
        exit()

    if event.keysym == 'Left':
        c.move(dude_id, -10, GRAVITY)
    elif event.keysym == 'Right':
        c.move(dude_id, 10, GRAVITY)

# to make the window
window = Tk()
window.title("jumpy jump")

c = Canvas(window, width=WIDTH, height=HEIGHT, bg='white')
c.pack()

# to create the sprite
dude_id = c.create_rectangle(0, 30, 15, 100, outline='green', fill='green')
c.move(dude_id, WIDTH / 2, HEIGHT / 2)

floor_id = c.create_rectangle(0, 485, 800, 500, fill='black')

c.bind_all('<Key>', move_dude)

window.mainloop()