day 20

020/food.py

@@ -0,0 +1,22 @@
+from turtle import Turtle
+import random
+
+class Food:
+    def __init__(self, screen_x_size, screen_y_size):
+        self.turtle = Turtle(shape="square")
+        self.turtle.color("cyan")
+        self.turtle.pu()
+
+        x_limit = int((screen_x_size-20)/40)
+        y_limit = int((screen_y_size-20)/40)
+
+        x_pos = random.randint(-x_limit, x_limit)*20
+        y_pos = random.randint(-y_limit, y_limit)*20
+        self.turtle.teleport(x=x_pos, y=y_pos)
+
+    
+    def get_position(self):
+        return self.turtle.xcor(), self.turtle.ycor()
+    
+    def hide(self):
+        self.turtle.hideturtle()

020/game.py

@@ -0,0 +1,71 @@
+from turtle import Screen, Turtle
+from snake import Snake
+from food import Food
+import time
+
+class GameManager:
+
+    BOARD_WIDTH=600
+    BOARD_HEIGHT=600
+
+    def __init__(self):
+        self.screen = Screen()
+
+        self.screen.setup(width=self.BOARD_WIDTH, height=self.BOARD_HEIGHT)
+        self.screen.bgcolor("black")
+        self.screen.title("Snake game")
+        self.screen.tracer(0)
+        self.snake = Snake()
+        self.screen.update()
+
+        self.food_on_screen = False
+
+        self.game_on = True
+
+    def control_snake(self):
+        self.screen.listen()        
+        self.screen.onkey(self.snake.up, "Up")
+        self.screen.onkey(self.snake.right, "Right")
+        self.screen.onkey(self.snake.down, "Down")
+        self.screen.onkey(self.snake.left, "Left")
+        self.snake.move()
+        self.screen.update()
+
+    def check_collision(self):
+        x, y = self.snake.get_head_position()
+        wall_collision =  x >= self.BOARD_WIDTH/2 or x <= -self.BOARD_WIDTH/2 or y >= self.BOARD_HEIGHT/2 or y <= -self.BOARD_HEIGHT/2
+        snake_collision = self.snake.tailbite()
+
+        return wall_collision or snake_collision
+    
+    def is_food_eaten(self):
+        snake_x, snake_y = self.snake.get_head_position()
+        food_x, food_y = self.food.get_position()
+
+        if int(snake_x) == int(food_x) and int(snake_y) == int(food_y):
+            print("Yihaa")
+            self.food.hide()
+            self.snake.extend()
+            self.food_on_screen = False
+        
+    def game_round(self):
+        if not self.food_on_screen:
+            self.food = Food(self.BOARD_WIDTH, self.BOARD_HEIGHT)
+            self.food_on_screen = True
+
+        self.control_snake()
+        if self.check_collision():
+            self.game_on = False
+            self.game_over()
+
+        self.is_food_eaten()
+        time.sleep(0.1)
+
+    def get_screen(self):
+        return self.screen
+    
+    def game_over(self):
+        turtle = Turtle()
+        turtle.color("yellow")
+        turtle.write("Game over!", move=False, align='center', font=('Arial', 32, 'normal')) 
+

020/main.py

@@ -0,0 +1,9 @@
+from game import GameManager
+import time
+
+game = GameManager()
+
+while game.game_on == True:
+    game.game_round()
+
+game.get_screen().exitonclick()

020/snake.py

@@ -0,0 +1,61 @@
+from turtle import Turtle
+
+class Snake:
+    def __init__(self):
+        self.segments = []
+        self.length = 3
+        self.extend_snake = False
+        for i in range(self.length):
+            turtle = Turtle(shape="square")
+            turtle.color("white")
+            turtle.pu()
+            x_pos = -i *20
+            turtle.teleport(x=x_pos)
+            self.segments.append(turtle)
+        
+    def move(self):
+        tail_position = self.segments[-1].position()
+
+        for i in range(len(self.segments) - 1, 0, -1):
+            self.segments[i].goto(self.segments[i-1].position())
+        self.segments[0].forward(20)
+
+        if self.extend_snake == True:
+            turtle = Turtle(shape="square")
+            turtle.color("white")
+            turtle.pu()
+            turtle.goto(tail_position)
+            self.segments.append(turtle)
+            self.extend_snake = False
+
+    def up(self):
+        if self.segments[0].heading() != 270:
+            for segment in self.segments:
+                segment.setheading(90)
+
+    def right(self):
+        if self.segments[0].heading() != 180:
+            for segment in self.segments:
+                segment.setheading(0)
+
+    def down(self):
+        if self.segments[0].heading() != 90:
+            for segment in self.segments:
+                segment.setheading(270)
+
+    def left(self):
+        if self.segments[0].heading() != 0:
+            for segment in self.segments:
+                segment.setheading(180)
+
+    def get_head_position(self):
+        return self.segments[0].xcor(), self.segments[0].ycor()
+    
+    def tailbite(self):
+        for i in range(len(self.segments) - 1, 0, -1):
+            if self.segments[0].position() == self.segments[i].position():
+                return True
+        return False
+    
+    def extend(self):
+        self.extend_snake = True