添加控件时碰撞检测不起作用

Question

我有一个检测碰撞的代码，如果我将 x 和 y 设置为远离它检测到碰撞的对象（我需要在运行脚本）
如果我在其中添加控件，并在运行期间移动它，它不会检测到碰撞。
这是代码：

import time
import random
import sys
import turtle

wn = turtle.Screen()
wn.title('collision') 
wn.bgcolor('black') 
wn.setup(width=800, height=600)
wn.tracer(0)

p_s = 20
e_s = 20

px = 0
py = 0
ex = 0
ey = 0
pec = 0

def collision():
    global pec
    pupc = px + p_s / 2 
    pdownc = px - p_s / 2
    pupcy = py + p_s / 2 
    pdowncy = py - p_s / 2

    if ex == px or ex > px and ex < pupc or ex == px or ex < px and ex > pdownc:

        if ey == py or ey > py and ey < pupcy or ey == py or ey < py and ey > pdowncy:
            pec = 1

        else:
            pec = 0

    else:
        pec = 0

    if pec == 1:
        print ('collision')

    elif pec == 0:
        print ('nope')

#enemy
e = turtle.Turtle()
e.goto(ex, ey)
e.speed(0)
e.color('red')
e.penup()

#player
p = turtle.Turtle()
p.goto(px, py)
p.speed(0)
p.shape('square')
p.color('blue')
p.penup()

print('move')
def p_up():
    py = p.ycor()
    py += 20
    p.sety(py)
    print(py)
    wn.update()
    collision()

def p_down():
    py = p.ycor()
    py -= 20
    p.sety(py)
    print(py)
    wn.update()
    collision()

def p_right():
    px = p.xcor()
    px += 20
    p.setx(px)
    print(px)
    wn.update()
    collision()

def p_left():
    px = p.xcor()
    px -= 20
    p.setx(px)
    print(px)
    wn.update()
    collision()



#keyboard binding
wn.listen()
wn.onkeypress(p_up, "Up")
wn.onkeypress(p_down, "Down")
wn.onkeypress(p_right, "Right")
wn.onkeypress(p_left, "Left")

#main part 
while True:
    wn.update()

Answer 1

我认为你让这个问题变得比必要的更难了。首先，turtle 使用 .distance() 方法提供基本的碰撞检测。其次，唯一需要的全局变量是常量，因为我们总是可以询问乌龟的当前位置（和航向等）：

from turtle import Screen, Turtle
from random import randrange

CURSOR_SIZE = 20
WIDTH, HEIGHT = 800, 600

def player_up():
    player.sety(player.ycor() + 20)
    check_collision()

def player_down():
    player.sety(player.ycor() - 20)
    check_collision()

def player_right():
    player.setx(player.xcor() + 20)
    check_collision()

def player_left():
    player.setx(player.xcor() - 20)
    check_collision()

def enemy_relocate():
    enemy.hideturtle()

    x = randrange(CURSOR_SIZE - WIDTH/2, WIDTH/2 - CURSOR_SIZE)
    y = randrange(CURSOR_SIZE - HEIGHT/2, HEIGHT/2 - CURSOR_SIZE)
    enemy.goto(x, y)

    enemy.showturtle()

def check_collision():
    if player.distance(enemy) < CURSOR_SIZE:
        print("Collision!")
        enemy_relocate()

screen = Screen()
screen.setup(WIDTH, HEIGHT)
screen.title("Collision!")
screen.bgcolor('black')

# enemy
enemy = Turtle()
enemy.shape('circle')
enemy.color('red')
enemy.speed('fastest')
enemy.penup()

enemy_relocate()

# player
player = Turtle()
player.shape('square')
player.color('blue')
player.speed('fastest')
player.penup()

# keyboard binding
screen.onkeypress(player_up, 'Up')
screen.onkeypress(player_down, 'Down')
screen.onkeypress(player_right, 'Right')
screen.onkeypress(player_left, 'Left')
screen.listen()

# main part
screen.mainloop()

添加控件时碰撞检测不起作用

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