#Introduction

print ("This program uses a cannonball to shoot at a target.")

#Create graphics window

win = GraphWin(200, 200)

win.setCoords(0.0, 0.0, 25.0, 25.0)

target = Target(win)

flag = False

targetHit = False

while not flag:

#Get inputs

print ()

a = eval(input("Enter the launch angle in degrees: "))

v = eval(input("Enter the initial velocity in meters per second: "))

h = eval(input("Enter the initial height in meters: "))

#Create tracker

projectile = Projectile(a, v, h)

tracker = Tracker(win, projectile)

time = 0.0

while projectile.getY() >= -5:

time += .0005

projectile.update(time)

tracker.update()

#Calculate if cannonball hit target

points = target.points()

center = tracker.circ.getCenter()

center_x = center.getX()

center_y = center.getY()

radius = tracker.circ.getRadius()

for point in points:

x = point.getX()

y = point.getY()

square_dist = (center_x-x) ** 2 + (center_y-y) ** 2

if square_dist <= radius ** 2:

targetHit = True

if targetHit:

print ("\nYou hit the target!")

flag = True

else:

flag = False

print ("\nTry again!")

#Close window

win.getMouse()