import turtle
import time
import random
wn = turtle.Screen()
wn.title("贪吃蛇游戏")
wn.bgcolor("black")
wn.setup(width=600, height=600)
wn.tracer(0) # 关闭屏幕自动更新
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("white")
head.penup()
head.goto(0, 0)
head.direction = "stop"
food = turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("red")
food.penup()
x = random.randint(-290, 290)
y = random.randint(-290, 290)
food.goto(x, y)
segments = []
def go_up():
if head.direction != "down":
head.direction = "up"
def go_down():
if head.direction != "up":
head.direction = "down"
def go_left():
if head.direction != "right":
head.direction = "left"
def go_right():
if head.direction != "left":
head.direction = "right"
def move():
if head.direction == "up":
y = head.ycor()
head.sety(y + 20)
elif head.direction == "down":
y = head.ycor()
head.sety(y - 20)
elif head.direction == "left":
x = head.xcor()
head.setx(x - 20)
elif head.direction == "right":
x = head.xcor()
head.setx(x + 20)
wn.listen()
wn.onkeypress(go_up, "w")
wn.onkeypress(go_down, "s")
wn.onkeypress(go_left, "a")
wn.onkeypress(go_right, "d")
while True:
wn.update()
if head.xcor() > 290 or head.xcor() < -290 or head.ycor() > 290 or head.ycor() < -290:
time.sleep(1)
head.goto(0, 0)
head.direction = "stop"
for segment in segments:
segment.goto(1000, 1000)
segments.clear()
if head.distance(food) < 20:
x = random.randint(-290, 290)
y = random.randint(-290, 290)
food.goto(x, y)
new_segment = turtle.Turtle()
new_segment.speed(0)
new_segment.shape("square")
new_segment.color("grey")
new_segment.penup()
segments.append(new_segment)
for index in range(len(segments) - 1, 0, -1):
x = segments[index - 1].xcor()
y = segments[index - 1].ycor()
segments[index].goto(x, y)
if len(segments) > 0:
x = head.xcor()
y = head.ycor()
segments[0].goto(x, y)
move()
for segment in segments:
if segment.distance(head) < 20:
time.sleep(1)
head.goto(0, 0)
head.direction = "stop"
for seg in segments:
seg.goto(1000, 1000)
segments.clear()
time.sleep(0.1)