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pong.py
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pong.py
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'''
Simple Pong Game for python beginners
Code adapted from @TokyoEdTech's freeCodeCamp.org tutorial
@author Sagnik
@date 3/15/2021
'''
#dependency for simple graphics development
import turtle
#global variables for the ball movement
BALL_X = 0.12
BALL_Y = -0.12
#(0,0) is the centre of the screen
window = turtle.Screen()
window.title("Pong Game MK 1.0")
window.bgcolor("black")
window.setup(width=800, height=600)
#stops the window from updating by itself
window.tracer(0)
''' Score '''
score_1 = 0
score_2 = 0
'''Ball'''
ball = turtle.Turtle()
ball.speed(0)
ball.shape("circle")
ball.color("red")
ball.penup()
ball.goto(0,0)
#delta by which ball moves
ball.dx = 0
ball.dy = 0
direction = 1
'''Paddle 1'''
paddle_1 = turtle.Turtle()
#speed of animation
paddle_1.speed(0)
paddle_1.shape("square")
paddle_1.color("gray")
paddle_1.shapesize(stretch_wid=5, stretch_len=1)
#prevent drawing lines
paddle_1.penup()
#where it starts
paddle_1.goto(-350, 0)
'''Paddle 2'''
paddle_2 = turtle.Turtle()
#speed of animation
paddle_2.speed(0)
paddle_2.shape("square")
paddle_2.color("gray")
paddle_2.shapesize(stretch_wid=5, stretch_len=1)
#prevent drawing lines
paddle_2.penup()
#where it starts
paddle_2.goto(+350, 0)
''' Pen '''
pen = turtle.Turtle()
pen.speed(0)
pen.color("white")
pen.penup()
pen.hideturtle()
pen.goto(0, 220)
pen.clear()
pen.write("Player 1 {} | {} Player 2".format(score_1, score_2), align="center", font=("Courier", 24, "normal"))
'''paddle controllers'''
def paddle_1_up():
y = paddle_1.ycor()
y += 20
paddle_1.sety(y)
def paddle_1_down():
y = paddle_1.ycor()
y -= 20
paddle_1.sety(y)
def paddle_2_up():
y = paddle_2.ycor()
y += 20
paddle_2.sety(y)
def paddle_2_down():
y = paddle_2.ycor()
y -= 20
paddle_2.sety(y)
def reset():
ball.dx = 0
ball.dy = 0
def start():
ball.dx = BALL_X * direction
ball.dy = BALL_Y
''' keyboard listeners'''
window.listen()
window.onkeypress(paddle_1_up, "w")
window.onkeypress(paddle_1_down, "s")
window.onkeypress(paddle_2_up, "Up")
window.onkeypress(paddle_2_down, "Down")
window.onkeypress(start, "space")
#Game loop
while True:
#we update manually here
window.update()
#move ball
ball.setx(ball.xcor() + ball.dx)
ball.sety(ball.ycor() + ball.dy)
#border check
#window dimensions width: 800 heigh: 600
#thus, +300 & -300 y axis. ball is 10 units
#window top
if ball.ycor() > 290:
ball.sety(290)
ball.dy *= -1
#window bottom
if ball.ycor() < -290:
ball.sety(-290)
ball.dy *= -1
#goes off right side
if ball.xcor() > 390:
ball.goto(0,0)
direction *= -1
reset()
ball.dx *= - 1
score_1 += 1
pen.clear()
pen.write(f"Player 1 {score_1} | {score_2} Player 2", align="center", font=("Courier", 24, "normal"))
#goes off left side
if ball.xcor() < -390:
ball.goto(0,0)
direction *= -1
reset()
ball.dx *= - 1
score_2 += 1
pen.clear()
pen.write("Player 1 %d | %d Player 2" % (score_1, score_2), align="center", font=("Courier", 24, "normal"))
#paddle collisions
if ( ball.xcor() > 340 and ball.xcor() < 350 ) and ( ball.ycor() < paddle_2.ycor() + 40 and ball.ycor() > paddle_2.ycor() - 40 ):
ball.setx(340)
ball.dx *= -1
if ( ball.xcor() < -340 and ball.xcor() > -350 ) and ( ball.ycor() < paddle_1.ycor() + 40 and ball.ycor() > paddle_1.ycor() - 40 ):
ball.setx(-340)
ball.dx *= -1