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- #Space Invaders
- import os
- import turtle
- import math
- import random
- wn = turtle.Screen()
- wn.bgcolor("black")
- wn.title("Space Invaders")
- #Draw border
- border_pen = turtle.Turtle()
- border_pen.speed(0)
- border_pen.color("green")
- 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 player
- player = turtle.Turtle()
- player.color("purple")
- player.shape("triangle")
- player.penup()
- player.speed(0)
- player.setposition(0, -250)
- player.setheading(90)
- playerspeed = 25
- #choose number of enemies
- number_of_enemies = 5
- #create an empty list of enemies
- enemies = []
- #add enemies to list
- for i in range(number_of_enemies):
- #create the enemy
- enemies.append(turtle.Turtle())
- #create enemy
- for enemy in enemies:
- enemy.color("red")
- enemy.shape("circle")
- enemy.penup()
- enemy.speed(0)
- x = random.randint(-200, 200)
- y = random.randint(100, 250)
- enemy.setposition(x, y)
- enemyspeed = 2
- #create 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 = 20
- #define bullet state
- #ready - ready to fire
- #fire - bullet is firing
- bulletstate = "ready"
- #Move 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
- global bulletstate
- if bulletstate == "ready":
- bulletstate = "fire"
- #move bullet
- 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 < 15:
- 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")
- #maiin game loop
- while True:
- for enemy in enemies:
- #move enemy
- x = enemy.xcor()
- x += enemyspeed
- enemy.setx(x)
- #move enemy back and forth
- if enemy.xcor() > 280:
- for e in enemies:
- y = e.ycor()
- y -= 40
- e.sety(y)
- enemyspeed *= -1
- if enemy.xcor() < -280:
- for e in enemies:
- y = e.ycor()
- y -= 40
- e.sety(y)
- enemyspeed *= -1
- #check for a collision between the bullet and enemy
- if isCollision(bullet, enemy):
- #reset the bullet
- bullet.hideturtle()
- bulletstate = "ready"
- bullet.setposition(0, -400)
- #reset enemy
- x = random.randint(-200, 200)
- y = random.randint(100, 250)
- enemy.setposition(x, y)
- #Update score
- score += 10
- scorestring = "Score: %s" % score
- score_pen.clear()
- score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))
- if isCollision(bullet, enemy):
- bullet.hideturtle()
- bulletstate = "ready"
- bullet.setposition(0, -400)
- #reset enemy
- enemy.setposition(-200, 250)
- if isCollision(player, enemy):
- player.hideturtle()
- enemy.hideturtle()
- print ("Game Over Bitches!")
- break
- #move bullet
- if bulletstate == "fire":
- y = bullet.ycor()
- y += bulletspeed
- bullet.sety(y)
- #check to see if bullet has gone to top
- if bullet.ycor() > 275:
- bullet.hideturtle()
- bulletstate = "ready"
- turtle.done()
- dealy = input("Press Enter to finsih.")
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