import turtle
import Tkinter
import math

# performance improvement

turtle.setundobuffer(1)
turtle.tracer(1)

# Screen Setup

screen = turtle.Screen()
screen.bgcolor("Black")
screen.title("Space Warrior")

# Game 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(4)
for side in range(4):
    border_pen.fd(600)
    border_pen.lt(90)
border_pen.hideturtle()


# Create the player

player = turtle.Turtle()

player.shape("triangle")
player.color("blue")
player.penup()
player.speed(0)
player.setposition(-0, -250)
player.setheading(90)

# Player Weapons

bulletspeed_raygun = 30

bullet = "tracking"

def raygun():
    bullet = turtle.Turtle()
    bullet.hideturtle()
    bullet.color("green")
    bullet.shape("square")
    bullet.penup()
    bullet.speed(0)
    bullet.setheading(90)
    bullet.shapesize(0.1, 0.5)
    z = player.ycor()
    x = player.xcor()
    bullet.setposition(x, z)
    bullet.showturtle()
    while True:
        drct = bullet.ycor()
        drct += bulletspeed_raygun
        bullet.sety(drct)
        if bullet.ycor() > 285:
            break
    if isCollision(t1, t2):
        bullet.hideturtle()
        bullet.setposition(0, -400)
        enemy.setposition(0, -400)
        enemy.hideturtle()


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

# Basic enemy

enemy = turtle.Turtle()
enemy.color("red")
enemy.shape("triangle")
enemy.penup()
enemy.speed(0)
enemy.setheading(270)
enemy.setposition(0, 285)

enemyspeed = 2

# Eventually Set Up Enemy Movement

# Movement Setup

playerspeed = 20


def move_left():
    x = player.xcor()
    x -= playerspeed
    if x < -285:
        x = -285
    player.setx(x)


def move_right():
    x = player.xcor()
    x += playerspeed
    if x > 285:
        x = 285
    player.setx(x)


def move_up():
    y = player.ycor()
    y += playerspeed
    if y > 285:
        y = 285
    player.sety(y)


def move_down():
    y = player.ycor()
    y -= playerspeed
    if y < -285:
        y = -285
    player.sety(y)

# Create keyboard binding

turtle.listen()
turtle.onkey(move_left, "a")
turtle.onkey(move_right, "d")
turtle.onkey(move_up, "w")
turtle.onkey(move_down, "s")

turtle.onkey(move_left, "A")
turtle.onkey(move_right, "D")
turtle.onkey(move_up, "W")
turtle.onkey(move_down, "S")

turtle.onkey(move_left, "Left")
turtle.onkey(move_right, "Right")
turtle.onkey(move_up, "Up")
turtle.onkey(move_down, "Down")

turtle.onkey(raygun, "k")
turtle.onkey(raygun, "K")
turtle.onkey(raygun, "space")

# Main Game Loop
while True:
    # Move the enemy
    y = enemy.ycor()
    y -= enemyspeed
    enemy.sety(y)
    if y < -285:
        y = 285
        enemy.sety(y)




Tkinter.mainloop()



#Full Error message
Exception in Tkinter callback
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 1536, in __call__
    return self.func(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/turtle.py", line 710, in eventfun
    fun()
  File "/Users/Operator/Documents/Projects/Programming/Codes/Games/Pythontut/space_warrior.py", line 67, in raygun
    if isCollision(t1, t2):
NameError: global name 't1' is not defined