Collisions become a function

You have collision checking working but as we add more cabbages it makes the code easier if you convert your existing collision code to a function.

Step 1. To create as a function we will use the isCollision to return a True or False return, to do that type the following at the end of the #Define functions section:

def isCollision(t1, t2):
       d = math.sqrt(math.pow(t1.xcor()-t2.xcor(),2) + math.pow(t1.ycor()-t2.ycor(),2))
       if d < 20:
           return True
       else:
           return False

So your function uses t1 and t2 as generic terms instead of turtle and food and uses the same collision formula as before with an if statement that returns a True value if they are in the same location (collide) and a False value when they don’t.

Step 2. Now you need to update the code within the while True loop # Collision checking section to look like:

# Collision checking
if isCollision(player, food):
    food.setposition(random.randint(-290, 290), random.randint(-290, 290))

Step 3. Save your game as kbgame5 and run your module.

Your code should now look like this:

#Turtle Graphics Game
import turtle
import math
import random

#Set up screen
turtle.setup(650,650)
wn = turtle.Screen()
wn.bgcolor("Navy")

#Draw border
mypen = turtle.Turtle()
mypen.color("white")
mypen.penup()
mypen.setposition(-300,-300)
mypen.pendown()
mypen.pensize(3)
for side in range(4):
    mypen.forward(600)
    mypen.left(90)
mypen.hideturtle()

#Create player turtle
player = turtle.Turtle()
player.color("darkorange")
player.shape("turtle")
player.penup()
player.speed(0)

#create food
food = turtle.Turtle()
food.color("lightgreen")
food.shape("circle")
food.penup()
food.speed(0)
food.setposition(random.randint(-290, 290), random.randint(-290, 290))

#Set speed variable
speed = 1

#Define  functions

def turn_left():
    player.left(30)

def turn_right():
    player.right(30)

def increase_speed():
    global speed
    speed += 1

def isCollision(t1, t2):
       d = math.sqrt(math.pow(t1.xcor()-t2.xcor(),2) + math.pow(t1.ycor()-t2.ycor(),2))
       if d < 20:
           return True
       else:
           return False

#Set keyboard bindings
turtle.listen()
turtle.onkey(turn_left, "Left")
turtle.onkey(turn_right, "Right")
turtle.onkey(increase_speed, "Up")


while True:
    player.forward(speed)

    #Boundary Checking x coordinate
    if player.xcor() > 290 or player.xcor() <-290:
        player.right(180)
    #Boundary Checking y coordinate
    if player.ycor() > 290 or player.ycor() <-290:
        player.right(180)

    #Collision checking

    if isCollision(player, food):
        food.setposition(random.randint(-290, 290), random.randint(-290, 290))

Time to celebrate

Congratulations Module 5 Completed