class Game(turtle.Turtle):
MAX_ENEMIES = 5
def __init__(self):
turtle.Turtle.__init__(self)
self.score = Score()
self.player = Player()
self.enemies = []
def setup(self):
# Set up screen
screen = turtle.Screen()
screen.bgcolor("black")
screen.title("Space Invaders")
# Display splash screen for 5 seconds
# screen.bgpic("splash.gif")
# time.sleep(5)
screen.bgpic("space_invaders_background.gif")
# Draw border
border = Border()
border.draw_border()
# Create enemies
self.create_enemies()
# Draw score
self.score.draw_score()
def create_enemies(self):
# Add enemies to the list
for _i in range(self.MAX_ENEMIES):
self.enemies.append(Enemy())
def isCollision(self, t1, t2):
distance = math.sqrt(
math.pow(t1.xcor() - t2.xcor(), 2) +
(math.pow(t1.ycor() - t2.ycor(), 2)))
return True if distance < 20 else False
def play_game(self):
# Set up game screen, border, and enemies
self.setup()
# Define keyboard bindings
turtle.listen()
turtle.onkey(self.player.move_left, "Left")
turtle.onkey(self.player.move_right, "Right")
turtle.onkey(self.player.fire_bullet, "space")
# Game loop
while True:
# Move enemies back and forth toward player
for enemy in self.enemies:
x = enemy.xcor() + Enemy.enemyspeed
enemy.setx(x)
if enemy.xcor() > 280 or enemy.xcor() < -280:
# Move ALL enemies
for e in self.enemies:
y = e.ycor() - 40
e.sety(y)
# Change enemy directions
Enemy.enemyspeed *= -1
# Check for collision between bullet and enemy
if self.isCollision(self.player.bullet, enemy):
# Play explosion sound
self.player.play_sound("explosion.wav")
# Reset the bullet
self.player.bullet.reset()
# Reset enemy position
enemy.reset_position()
# Update score
self.score.update_score()
# Check for collison between enemy and player
if self.isCollision(self.player, enemy) or enemy.ycor() < -250:
# Play explosion sound
self.player.play_sound("explosion.wav")
# Game is over
self.player.hideturtle()
enemy.hideturtle()
print("Game Over!")
break
# Move the bullet till it gets to the top boundary
self.player.bullet.move()
self.player.bullet.boundary_check()
