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from __future__ import division
from math import cos, sin, fabs, pi
from random import randint
from sfml import sf
# define some constants
game_size = sf.Vector2(800, 600)
paddle_size = sf.Vector2(25, 100)
ball_radius = 10.
# create the window of the application
w, h = game_size
window = sf.RenderWindow(sf.VideoMode(w, h), "pySFML - Pong")
window.vertical_synchronization = True
# load the sounds used in the game
ball_sound_buffer = sf.SoundBuffer.from_file("data/ball.wav")
ball_sound = sf.Sound(ball_sound_buffer)
# create the left paddle
left_paddle = sf.RectangleShape()
left_paddle.size = paddle_size - (3, 3)
left_paddle.outline_thickness = 3
left_paddle.outline_color = sf.Color.BLACK
left_paddle.fill_color = sf.Color(100, 100, 200)
left_paddle.origin = paddle_size / 2
# create the right paddle
right_paddle = sf.RectangleShape()
right_paddle.size = paddle_size - (3, 3)
right_paddle.outline_thickness = 3
right_paddle.outline_color = sf.Color.BLACK
right_paddle.fill_color = sf.Color(200, 100, 100)
right_paddle.origin = paddle_size / 2
# create the ball
ball = sf.CircleShape()
ball.radius = ball_radius - 3
ball.outline_thickness = 3
ball.outline_color = sf.Color.BLACK
ball.fill_color = sf.Color.WHITE
ball.origin = (ball_radius / 2, ball_radius / 2)
# load the font
font = sf.Font.from_file("data/sansation.ttf")
# initialize the pause message
pause_message = sf.Text()
pause_message.font = font
pause_message.character_size = 40
pause_message.position = (170, 150)
pause_message.color = sf.Color.WHITE
pause_message.string = "Welcome to pySFML pong!\nPress space to start the game"
# define the paddles properties
ai_timer = sf.Clock()
ai_time = sf.seconds(0.1)
paddle_speed = 400.
right_paddle_speed = 0.
ball_speed = 400.
ball_angle = 0. # to be changed later
clock = sf.Clock()
is_playing = False
while window.is_open:
# handle events
for event in window.events:
# window closed or escape key pressed: exit
if type(event) is sf.CloseEvent:
window.close()
# space key pressed: play
if type(event) is sf.KeyEvent and event.pressed and event.code is sf.Keyboard.SPACE:
if not is_playing:
# (re)start the game
is_playing = True
clock.restart()
# reset the position of the paddles and ball
left_paddle.position = (10 + paddle_size.x / 2, game_size.y / 2)
right_paddle.position = (game_size.x - 10 - paddle_size.x / 2, game_size.y / 2)
ball.position = game_size / 2
# reset the ball angle
while True:
# make sure the ball initial angle is not too much vertical
ball_angle = (randint(0, 32767) % 360) * 2 * pi / 360
if not fabs(cos(ball_angle)) < 0.7: break
if is_playing:
delta_time = clock.restart().seconds
# move the player's paddle
if sf.Keyboard.is_key_pressed(sf.Keyboard.UP) and left_paddle.position.y - paddle_size.y / 2 > 5:
left_paddle.move((0, -paddle_speed * delta_time))
elif sf.Keyboard.is_key_pressed(sf.Keyboard.DOWN) and left_paddle.position.y + paddle_size.y / 2 < game_size.y - 5:
left_paddle.position += (0, paddle_speed * delta_time)
# move the computer' paddle
if (right_paddle_speed < 0 and right_paddle.position.y - paddle_size.x / 2 > 5) or (right_paddle_speed > 0 and right_paddle.position.y + paddle_size.y / 2 < game_size.y - 5):
right_paddle.position += (0, right_paddle_speed * delta_time)
# update the computer's paddle direction according to the ball position
if ai_timer.elapsed_time > ai_time:
ai_timer.restart()
if ball.position.y + ball_radius > right_paddle.position.y + paddle_size.y / 2:
right_paddle_speed = paddle_speed
elif ball.position.y - ball_radius < right_paddle.position.y - paddle_size.y / 2:
right_paddle_speed = - paddle_speed
else:
right_paddle_speed = 0
# move the ball
factor = ball_speed * delta_time
ball.move((cos(ball_angle) * factor, sin(ball_angle) * factor))
# check collisions between the ball and the screen
if ball.position.x - ball_radius < 0:
is_playing = False
pause_message.string = "You lost!\nPress space to restart or\nescape to exit"
if ball.position.x + ball_radius > game_size.x:
is_playing = False
pause_message.string = "You won !\nPress space to restart or\nescape to exit"
if ball.position.y - ball_radius < 0:
ball_sound.play()
ball_angle = - ball_angle
ball.position.y = ball_radius + 0.1
if ball.position.y + ball_radius > game_size.y:
ball_sound.play()
ball_angle = - ball_angle
ball.position.y = game_size.y - ball_radius - 0.1
# check the collisions between the ball and the paddles
# left paddle
if ball.position.x - ball_radius < left_paddle.position.x + paddle_size.x / 2 and ball.position.x - ball_radius > left_paddle.position.x and ball.position.y + ball_radius >= left_paddle.position.y - paddle_size.y / 2 and ball.position.y - ball_radius <= left_paddle.position.y + paddle_size.y / 2:
if ball.position.y > left_paddle.position.y:
ball_angle = pi - ball_angle + (randint(0, 32767) % 20) * pi / 180
else:
ball_angle = pi - ball_angle - (randint(0, 32767) % 20) * pi / 180
ball_sound.play()
ball.position = (left_paddle.position.x + ball_radius + paddle_size.x / 2 + 0.1, ball.position.y)
# right paddle
if ball.position.x + ball_radius > right_paddle.position.x - paddle_size.x / 2 and ball.position.x + ball_radius < right_paddle.position.x and ball.position.y + ball_radius >= right_paddle.position.y - paddle_size.y / 2 and ball.position.y - ball_radius <= right_paddle.position.y + paddle_size.y / 2:
if ball.position.y > right_paddle.position.y:
ball_angle = pi - ball_angle + (randint(0, 32767) % 20) * pi / 180
else:
ball_angle = pi - ball_angle - (randint(0, 32767) % 20) * pi / 180
ball_sound.play()
ball.position = (right_paddle.position.x - ball_radius - paddle_size.x / 2 - 0.1, ball.position.y)
window.clear(sf.Color(50, 200, 50))
if is_playing:
# draw the paddles and the ball
window.draw(left_paddle)
window.draw(right_paddle)
window.draw(ball)
else:
# draw the pause message
window.draw(pause_message)
# display things on screen
window.display()
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