[python100 line series] - tic tac toe game

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Don't talk much , Try to use today turtle Library to write a tic tac toe game .

• 1. First of all, you need to draw a chessboard with a character of well
• 2. You need two players, circle and fork , By clicking on the chessboard O and ×
• 3. Judge the condition , When the winning conditions are met , Game over .

1. Let's first define the size of the chessboard ,600*600

• It's divided into 9 GongGe , Each grid is 200*200
• I choose the center point of each grid as the coordinate

# The center of all the grids
position = {(-200, 200): 0, (0, 200): 0, (200, 200): 0
, (-200, 0): 0, (0, 0): 0, (200, 0): 0
, (-200, -200): 0, (0, -200): 0, (200, -200): 0}

• This is a key for coordinates , The value is O perhaps x Dictionary , When it comes to 0 when , It is considered that this grid has not been used yet .

Define the screen size

turtle.setup(width, height)

2. Tic tac toe chessboard

# Draw line
def draw_line(x, y, direction=None):
if direction:
turtle.seth(direction)
turtle.penup()
turtle.goto(x, y)
turtle.pendown()
turtle.forward(width)
# Well chessboard
def tic_tac_toe():
draw_line(-300, 100)
draw_line(-300, -100)
draw_line(-100, 300, 270)
draw_line(100, 300, 270)
turtle.update()

3. Monitor click events , When the clicked coordinates are in the grid , Then draw one in the grid O or X

• By judgment Center point , Click on Whether the distance between them is less than the radius of the lattice , To determine which grid is clicked
• meanwhile , Also determine whether the grid has been used , Used cannot be used .
• At the beginning of the game , The painting is O, And then there was ×, alternate , Until the end of the game .

# Draw a circle where you click , Draw a picture x
def draw_flag(x, y):
global last_person
in_pos = None
can_write = False
for p in position.keys():
if (p[0] - x) ** 2 + (p[1] - y) ** 2 < 10000:
in_pos = p
if position.get(in_pos, None) == 0:
can_write = True
break
# This position can be circled or x
if can_write:
# draw x Or draw O, When True when , We draw circles , When False when , We draw x
if len(circle_list) > len(x_list):
circle_x = False
position[in_pos] = 'x'
last_person = 'x'
x_list.append(in_pos)
else:
circle_x = True
circle_list.append(in_pos)
position[in_pos] = 'o'
last_person = 'o'
# Draw a circle
if circle_x:
turtle.color("red")
turtle.seth(270)
turtle.penup()
turtle.goto(in_pos[0] - 100, in_pos[1])
turtle.pendown()
turtle.circle(100)
# draw x
else:
turtle.color("black")
for i in range(4):
turtle.penup()
turtle.goto(in_pos[0], in_pos[1])
turtle.pendown()
turtle.seth(45 + i * 90)
turtle.forward(sqrt(20000))
turtle.update()
who_win()

4. Judge the conditions for winning , After each click .

# Judge the winner
def who_win():
v = list(position.values())
# A victory situation , A horizontal line , A vertical line , Oblique line
win_1 = v[0] == v[1] == v[2] != 0 or v[3] == v[4] == v[5] != 0 or v[6] == v[7] == v[8] != 0
win_2 = v[0] == v[3] == v[6] != 0 or v[1] == v[4] == v[7] != 0 or v[2] == v[5] == v[8] != 0
win_3 = v[0] == v[4] == v[8] != 0 or v[2] == v[4] == v[6] != 0
if win_1 or win_2 or win_3:
turtle.goto(-120, 0)
turtle.write("game over,{} is winner".format(last_person), font=("Arial", 25, "normal"))
turtle.onscreenclick(None)

The last simple tic tac toe game is written ！！