snake.py

import turtle
import time
import random

delay = 0.1
segments = []

# placar
score = 0
high_score = 0

# Configura a Tela
win = turtle.Screen()
win.title("Snake Game")
win.bgcolor("blue")
win.setup(width=600,height=600)
win.tracer(0)

# Cabeça da Cobra
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("black")
head.penup()
head.goto(0, 100)
head.direction = "stop"

# Comida para a Cobra
food = turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("red")
food.penup()
food.shapesize(0.50, 0.50)
food.goto(0,0)

# exibir o placar
pen = turtle.Turtle()
pen.speed(0)
pen.shape("square")
pen.color("white")
pen.penup()
pen.hideturtle()
pen.goto(0, 260)
pen.write("Score: 0 High Score: {}".format(high_score), align="center", font=("Courier", 24, "normal"))

# Funcao de Movimentacao
def move():
    # move o segmento 0 onde a cabeça da cobra está
    if len(segments) > 0:
        x = head.xcor()
        y = head.ycor()
        segments[0].goto(x, y)

    if head.direction == "up":
        y = head.ycor() # coordenada y da turtle
        head.sety(y + 20)
    if head.direction == "down":
        y = head.ycor() # coordenada y da turtle
        head.sety(y - 20)
    if head.direction == "right":
        x = head.xcor() # coordenada x da turtle
        head.setx(x + 20)
    if head.direction == "left":
        x = head.xcor() # coordenada y da turtle
        head.setx(x - 20)
    
    # move os segmentos da cobra
    for index in range(len(segments)-1, 0, -1):
        x = segments[index-1].xcor()
        y = segments[index-1].ycor()
        segments[index].goto(x, y)


def go_up():
    if head.direction != "down":
        head.direction = "up"

def go_down():
    if head.direction != "up":
        head.direction = "down"

def go_right():
    if head.direction != "left":
        head.direction = "right"

def go_left():
    if head.direction != "right":
        head.direction = "left"

# controle do teclado
win.listen()
win.onkey(go_up, "w")
win.onkey(go_down, "s")
win.onkey(go_right, "d")
win.onkey(go_left, "a")

# Loop Principal
while True:
    win.update()
    move()
    time.sleep(delay)

    if head.distance(food) < 15:
        y = random.randint(-290,290)
        x = random.randint(-290,290)
        food.goto(x,y)

        # aumenta a pontuacao
        score = score+10
        if score > high_score:
            high_score = score

        # inclui um segmento
        new_segment = turtle.Turtle()
        new_segment.speed(0)
        new_segment.shape("square")
        new_segment.color("grey")
        new_segment.penup()
        segments.append(new_segment)
    
    # Checa por colisões
    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"
        score = 0

        # remove os segmentos
        for segment in segments:
            segment.goto(1000, 1000)
            # limpa a lista de segmentos
            segments = []
    
    # Checa por colisões no corpo
    for segment in segments:
        if segment.distance(head) < 20:
            time.sleep(1)
            head.goto(0, 0)
            head.direction = "stop"
            score = 0

            # remove os segmentos
            for segment in segments:
                segment.goto(1000, 1000)
                # limpa a lista de segmentos
                segments = []
    
    # atualiza a pontuacao
    pen.clear()
    pen.write("score: {} High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal"))