SpaceInvader.py

import turtle
import winsound
import math
import random
import sys
import os

# https://stackoverflow.com/questions/31836104/pyinstaller-and-onefile-how-to-include-an-image-in-the-exe-file
def resource_path(relative_path):
    """ Get absolute path to resource, works for dev and for PyInstaller """
    try:
        # PyInstaller creates a temp folder and stores path in _MEIPASS
        base_path = sys._MEIPASS2
    except Exception:
        base_path = os.path.abspath(".")

    return os.path.join(base_path, relative_path)

# Set up the scree
wn = turtle.Screen()
wn.bgcolor("black")
wn.title("Space Invaders")
wn.bgpic(resource_path("img\\background.gif"))

#Register the shapes
turtle.register_shape(resource_path("img\\invader.gif"))
turtle.register_shape(resource_path("img\\player.gif"))

# Draw border
border_pen = turtle.Turtle()
border_pen.speed(0)
border_pen.color("white")
border_pen.penup()
border_pen.setposition(-300, -300)
border_pen.pendown()
border_pen.pensize(3)
for side in range(4):
    border_pen.fd(600)
    border_pen.lt(90)
border_pen.hideturtle()

#Set score to 0
score = 0

#Draw score
score_pen=turtle.Turtle()
score_pen.speed(0)
score_pen.color("white")
score_pen.penup()
score_pen.setposition(-290, 280)
scorestring = "Score: %s " %score
score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))
score_pen.hideturtle()

# Create the player turtle
player = turtle.Turtle()
player.color("blue")
player.shape(resource_path("img\\player.gif"))
player.penup()
player.speed(0)
player.setposition(0, -250)
player.setheading(90)

playerspeed = 10

#Choose a number of enemies
number_of_enemies = 5
#Create an empty list of enemies
enemies = []

#Add enemies to the list
for i in range(number_of_enemies):
    # Create the enemy
    enemies.append(turtle.Turtle())

for enemy in enemies:
    enemy.color("red")
    enemy.shape(resource_path("img\\invader.gif"))
    enemy.penup()
    enemy.speed(0)
    x = random.randint(-200, 200)
    y = random.randint(100, 250)
    enemy.setposition(x, y)

    enemyspeed = 2

# Create player's bullet
bullet = turtle.Turtle()
bullet.color("yellow")
bullet.shape("triangle")
bullet.penup()
bullet.speed(0)
bullet.setheading(90)
bullet.shapesize(0.5, 0.5)
bullet.hideturtle()

bulletspeed = 50

# Define bullet state
# ready - ready to fire
# fire - bullet is firing
bulletstate = "ready"


# Move the player left and right
def move_left():
    x = player.xcor()
    x -= playerspeed
    if x < -280:
        x = -280
    player.setx(x)


def move_right():
    x = player.xcor()
    x += playerspeed
    if x > 280:
        x = 280
    player.setx(x)


def fire_bullet():
    # Declare bulletstate as global if it needs changed
    global bulletstate
    if bulletstate == "ready":
        winsound.PlaySound(resource_path("sounds\\laser.wav"), winsound.SND_ASYNC)
        bulletstate = "fire"
        # Move the bullet to just above the player
        x = player.xcor()
        y = player.ycor() + 10
        bullet.setposition(x, y)
        bullet.showturtle()


def isCollision(t1, t2):
    distance = math.sqrt(math.pow(t1.xcor() - t2.xcor(), 2) + math.pow(t1.ycor() - t2.ycor(), 2))
    if distance < 28:
        return True
    else:
        return False


# Create keyboard bindings
turtle.listen()
turtle.onkey(move_left, "Left")
turtle.onkey(move_right, "Right")
turtle.onkey(fire_bullet, "space")
# Main game loop
while True:

    for enemy in enemies:
        # Move the enemy
        x = enemy.xcor()
        x += enemyspeed
        enemy.setx(x)

        # Move enemy back and down
        if enemy.xcor() > 280:
            #Move all enemies down
            for e in enemies:
                y = e.ycor()
                y -= 20
                e.sety(y)
            #Change enemy direction
            enemyspeed *= -1

        if enemy.xcor() < -280:
            #Move all enemies down
            for e in enemies:
                y = e.ycor()
                y -= 20
                e.sety(y)
            #Change enemy direction
            enemyspeed *= -1

        # Check collision between bullet and enemy
        if isCollision(bullet, enemy):
            # Reset the bullet
            bullet.hideturtle()
            bulletstate = "ready"
            bullet.setposition(0, -400)
            # Reset the enemy
            x = random.randint(-200, 200)
            y = random.randint(100, 250)
            enemy.setposition(x, y)
            score += 10
            scorestring = "Score: %s " %score
            score_pen.clear()
            score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))

        if isCollision(player, enemy):
            player.hideturtle()
            enemy.hideturtle()
            print("Game Over")
            break

    # Move the bullet
    if bulletstate == "fire":
        y = bullet.ycor()
        y += bulletspeed
        bullet.sety(y)

    # Check to see if the bullet reached top
    if bullet.ycor() > 280:
        bullet.hideturtle()
        bulletstate = "ready"

delay = input("Press enter to finish")