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python - Python Turtle 碰撞循环

问题描述

我正在尝试构建一个简单的游戏。用户控制海龟。当它接触圆圈时，圆圈会重新定位，玩家将获得一分。该程序只运行一次这一位，请参见代码中的注释。我如何使程序始终运行它？我认为 mainloop() 做到了这一点。

def move_t2():
    t2.ht()
    rc_list = [-300, -250, -200, -150, -100, -50, 0, 50, 100, 150, 200, 250, 300]
    r1 = random.choice(rc_list)
    r2 = random.choice(rc_list)
    t2.setpos(r1, r2)
    t2.st()

def more_points():
    t3_points.clear()
    new_points=points + 1
    if new_points >=0:
        t3_points.write("Points "+str(new_points),font=10)
  
# The program only run this part one time. I want it to loop.
if t.distance(t2) < 50:
    move_t2()
    more_points()


def mr():
    if t.xcor()<301:
        t.setheading(0)
        t.fd(50)
    else:
        t.setheading(180)
def ml():
    if t.xcor() > -301:
        t.setheading(180)
        t.fd(50)
    else:
        t.setheading(0)
def mu():
    if t.ycor() < 301:
        t.setheading(90)
        t.fd(50)
    else:
        t.setheading(270)
def md():
    if t.ycor() > -301:
        t.setheading(270)
        t.fd(50)
    else:
        t.setheading(90)

ts.onkey(mr,"Right")
ts.onkey(ml,"Left")
ts.onkey(mu,"Up")
ts.onkey(md,"Down")

ts.listen()
ts.mainloop()

标签： pythonpython-3.xturtle-graphics

解决方案

该程序只运行一次这一位，请参见代码中的注释。我如何使程序始终运行它？我认为 mainloop() 做到了这一点。

有问题的代码位位于顶层，仅设置为运行一次。将mainloop()控制权移交给事件处理程序，以便键盘键等可以触发事件。需要发生的是碰撞检查代码需要成为一个函数并添加到每个键盘事件处理程序中：

from turtle import Screen, Turtle
from random import choice

POSITION_LIST = [-300, -250, -200, -150, -100, -50, 0, 50, 100, 150, 200, 250, 300]

FONT = ('Arial', 18, 'normal')

def move_turtle(t):
    t.hideturtle()
    r1 = choice(POSITION_LIST)
    r2 = choice(POSITION_LIST)
    t.setpos(r1, r2)
    t.showturtle()

points = 0

def more_points():
    global points

    points += 1
    pen.clear()
    pen.write("Points: {}".format(points), align='center', font=FONT)

def mr():
    if t1.xcor() < 301:
        t1.setheading(0)
        t1.fd(25)
    else:
        t1.setheading(180)

    check_collision()

def ml():
    if t1.xcor() > -301:
        t1.setheading(180)
        t1.fd(25)
    else:
        t1.setheading(0)

    check_collision()

def mu():
    if t1.ycor() < 301:
        t1.setheading(90)
        t1.fd(25)
    else:
        t1.setheading(270)

    check_collision()

def md():
    if t1.ycor() > -301:
        t1.setheading(270)
        t1.fd(25)
    else:
        t1.setheading(90)

    check_collision()

def check_collision():
    if t1.distance(t2) < 20:
        move_turtle(t2)
        more_points()

screen = Screen()
screen.setup(700, 700)

t1 = Turtle()
t1.shape('turtle')
t1.penup()
move_turtle(t1)

t2 = Turtle()
t2.shape('circle')
t2.penup()
move_turtle(t2)

pen = Turtle()
pen.hideturtle()
pen.penup()
pen.sety(-325)
pen.write("Points: {}".format(points), align='center', font=FONT)

screen.onkey(mr, "Right")
screen.onkey(ml, "Left")
screen.onkey(mu, "Up")
screen.onkey(md, "Down")

screen.listen()
screen.mainloop()

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