双轴 Bbox 故障

Question

我正在测试一个 Tkinter 项目，该项目将在软件中有一些小游戏（有点像 Mario paint）。对于这个测试，我有 2 个盒子，一个是红色的，另一个是蓝色的，但是当它在红色盒子旁边或里面时，它会变成绿色。

这是代码。

from tkinter import *
from threading import Timer

window = Tk()
window.title("Canvas Test")

x = 30
y = 30

Test = Canvas(window, width = 1000, height = 1000)
Test.config(bg = "white")
Test.pack()

Move = Test.create_rectangle(x, y, x + 40, y + 40, fill = "blue")
Hitd = Test.create_rectangle(x, y, x + 40, y + 40, fill = "red")
Move = Test.create_rectangle(x, y, x + 30, y + 30, fill = "blue")

Test.update()

w = False
a2 = False
s = False
d = False

def KeyDown(event):
    print("K Down")
    global x
    global y
    global Move
    global w
    global a2
    global s
    global d
    if event.char == "w" or event.char == "W":
        w = True
    elif event.char == "s" or event.char == "S":
        s = True
    if event.char == "a" or event.char == "A":
        a2 = True 
    elif event.char == "d" or event.char == "D":
        d = True

def KeyUp(event):
    print("K Up")
    global w
    global a2
    global s
    global d
    if event.char == "w" or event.char == "W":
        w = False
    elif event.char == "s" or event.char == "S":
        s = False
    if event.char == "a" or event.char == "A":
        a2 = False 
    elif event.char == "d" or event.char == "D":
        d = False


def MoveCheck():
    global Move
    global w
    global a2
    global s
    global d
    if w == True:
        Test.move(Move, 0, -10) #name, x mod, y mod
    elif s == True:
        Test.move(Move, 0, 10)
    if a2 == True:
        Test.move(Move, -10, 0)
    elif d == True:
        Test.move(Move, 10, 0)

    a = Test.bbox(Move)
    b = Test.bbox(Hitd)
    if b[0] in range(a[0],a[2]) or b[2] in range(a[0],a[2]) and b[1] in range(a[1],a[3]) or b[3] in range(a[1],a[3]):
        Test.itemconfig(Move, fill = "green")
    else:
        Test.itemconfig(Move, fill = "blue")

    t = Timer(0.03, MoveCheck)
    t.start()
MoveCheck()

window.bind("<Key>", KeyDown)
window.bind("<KeyRelease>", KeyUp)

window.mainloop()

如果您与方块对齐，然后向下或向上移动 1（或 left/right，具体取决于您在哪个轴上进行测试），那么您会看到方块无论如何都会变成绿色。我对使用 bbox 非常陌生，所以这可能只是我的疏忽。

Answer 1

您可以使用 Canvas.find_overlapping() 测试移动矩形是否与其他对象重叠。

a = Test.bbox(Move)
#b = Test.bbox(Hitd)

if Hitd in Test.find_overlapping(*a):
    Test.itemconfig(Move, fill = "green")
else:
    Test.itemconfig(Move, fill = "blue")

具有其他更改的完整工作代码

after() 而不是 Thread
lower_case_names 对于变量 (PEP 8 -- Style Guide for Python Code)
函数中的参数 = 周围没有空格 (PEP 8 -- Style Guide for Python Code)
没有 import * (PEP 8 -- Style Guide for Python Code)
主要部分之前的所有函数（和类）
有意义的变量名（canvas 而不是 Test）

。

import tkinter as tk

# --- functions ---

def key_down(event):
    global speed_x
    global speed_y

    print("K Down")

    char = event.char.lower()

    if char == "w":
        speed_y = -10
    elif char == "s":
        speed_y = 10
    elif char == "a":
        speed_x = -10
    elif char == "d":
        speed_x = 10

def key_up(event):
    global speed_x
    global speed_y

    print("K Up")

    char = event.char.lower()

    if char in ("w", "s"):
        speed_y = 0
    elif char in ("a", "d"):
        speed_x = 0


def move_check():
    canvas.move(player, speed_x, speed_y) #name, x mod, y mod

    player_bbox = canvas.bbox(player)

    if enemy in canvas.find_overlapping(*player_bbox):
        canvas.itemconfig(player, fill="green")
    else:
        canvas.itemconfig(player, fill="blue")

    window.after(30, move_check)

# --- main ---

window = tk.Tk()
window.title("Canvas Test")

x = 30
y = 30
speed_x = 0
speed_y = 0

canvas = tk.Canvas(window, width=1000, height=1000, bg="white")
canvas.pack()

enemy = canvas.create_rectangle(x, y, x+40, y+40, fill="red")
player = canvas.create_rectangle(x, y, x+30, y+30, fill="blue")

move_check()

window.bind("<Key>", key_down)
window.bind("<KeyRelease>", key_up)

window.mainloop()

双轴 Bbox 故障

Bbox malfunction on both axis

python

tkinter

tkinter-canvas