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所以我正在为我的计算机科学课上的一个小项目奠定基础，我对使用 python 编程仍然相对较新，这是我第一个使用 Ursina 3D 游戏引擎的真正项目。

无论如何，我正在重新制作一个瞄准训练器，比如 Kovaaks，我想实现一个挑战功能，当我按下 Tab 时（最终是播放按钮），它会启动 60 秒计时器，将点数清零，然后停止记录计时器结束时的点数。但是，每次我尝试实现睡眠定时器时，它都会冻结整个程序，并且实际上从未启动任何东西。我怎么能这样做？

# -*- coding: utf-8 -*-
"""
Created on Tue Oct  5 16:46:24 2021

@author: gf112234
"""
import random
from ursina import *
from ursina.prefabs.first_person_controller import FirstPersonController
##########
# update #
##########
def update():
  pass

#########
# start #
#########
def targetspawn():
    xpos = random.randrange(-10,10)
    ypos = random.randrange(-6,6)
    zpos = random.randrange(17,20)
    return xpos, ypos, zpos
points = -3
def spawn():
    global points
    points += 1
    xpos, ypos, zpos = targetspawn()
    target1.position=(xpos, ypos, zpos)
def spawn2():
    global points
    points += 1
    xpos, ypos, zpos = targetspawn()
    target2.position=(xpos, ypos, zpos)
def spawn3():
    global points
    points += 1
    xpos, ypos, zpos = targetspawn()
    target3.position=(xpos, ypos, zpos)

def input(key):
    if key == 'tab':
       global points
       points = 0
       
       # print(points)

######################
# Application Window #
######################
app = Ursina()

window.title = 'Static-Click 3 Targets'
window.borderless = False
window.fullscreen = True
mouse.locked = True


ground = Entity(model='plane', scale=(2,1,1), color=color.blue, collider='box')


crosshair = Entity(parent=camera.ui, model='quad', color=color.pink, scale=0.007, rotation_z=45)

player = FirstPersonController(y=0, origin_y=0, mouse_sensitivity=(10,10))

target1 = Button(parent=scene, model='sphere', color=color.blue, position=(0 ,0, 0), collider='sphere')

spawn()

target2 = Button(parent=scene, model='sphere', color=color.red, position=(0 ,0, 0), collider='sphere')

spawn2()

target3 = Button(parent=scene, model='sphere', color=color.yellow, position=(0 ,0, 0), collider='sphere')

spawn3()

target1.on_click = spawn
target2.on_click = spawn2
target3.on_click = spawn3

input('tab')

update()

app.run()
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1 回答 1

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像这样的东西：

timer = Text(text='60', t=60)
def update():
    time.t -= time.dt
    timer.text = str(round(timer.t, 2))
于 2021-10-07T09:58:40.877 回答