Hi all, I've dabbled with pygame and wrote a Pong-like game (code see below).
I've tried to follow the advice in the tips/tutorial section and also tried out the dirty-rect strategy described in https://www.pygame.org/docs/ref/sprite.html#comment_pygame_sprite_RenderUpdates This did not seem to make any difference, so I reverted back to the original code. The performance is still much less than I expecte - with a lot of stuttering on my (not so old) Windows PC, so I guess I must be making some silly mistake. It would be very kind, if someone could give me a heads-up. Cheers Andreas P.S. I'd be happy to supply additional information, if that would help. -----------------------8< SNIP 8<----------------------- import pygame import random import math class MovingRectSprite(pygame.sprite.Sprite): def __init__(self, width, height, screen_width, screen_height, color, center_x=0, center_y=0): super().__init__() self.image = pygame.Surface((width, height)).convert() self.image.fill(color) self.rect = self.image.get_rect() self.rect.center = (center_x, center_y) self.screen_width = screen_width self.screen_height = screen_height self.x_speed = 0 self.y_speed = 0 def update(self): self.rect.x += self.x_speed self.rect.y += self.y_speed class Paddle(MovingRectSprite): SPEED = 10 def __init__(self, width, height, screen_width, screen_height, color, center_x, center_y): super().__init__(width, height, screen_width, screen_height, color, center_x, center_y) self.acceleration = 0 self.go_up = False self.go_down = False def update(self): super().update() if self.rect.top < 0: self.rect.top = 0 self.y_speed = 0 elif self.rect.bottom >= self.screen_height: self.rect.bottom = self.screen_height - 1 self.y_speed = 0 def key_down(self, is_up_key): if is_up_key: self.go_up = True self.y_speed = -self.SPEED else: self.go_down = True self.y_speed = self.SPEED def key_up(self, is_up_key): if is_up_key: self.go_up = False if self.go_down: self.y_speed = self.SPEED else: self.y_speed = 0 else: self.go_down = False if self.go_up: self.y_speed = -self.SPEED else: self.y_speed = 0 class Pong(object): def __init__(self): pygame.init() self.fps = 60 self.background = (0, 0, 0) self.clock = pygame.time.Clock() self.running = False self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN | pygame.DOUBLEBUF) self.sprites = pygame.sprite.Group() paddle_width = self.screen.get_width() / 50 paddle_height = self.screen.get_height() / 10 self.paddles = pygame.sprite.Group() self.paddle_left = Paddle(paddle_width, paddle_height, self.screen.get_width(), self.screen.get_height(), (192, 0, 0), paddle_width / 2, self.screen.get_height() / 2) self.sprites.add(self.paddle_left) self.paddles.add(self.paddle_left) self.paddle_right = Paddle(paddle_width, paddle_height, self.screen.get_width(), self.screen.get_height(), (0, 0, 192), self.screen.get_width() - paddle_width / 2, self.screen.get_height() / 2) self.sprites.add(self.paddle_right) self.paddles.add(self.paddle_right) self.ball = MovingRectSprite(self.screen.get_width() / 100, self.screen.get_width() / 100, self.screen.get_width(), self.screen.get_height(), (255, 255, 0), self.screen.get_width() / 2, self.screen.get_height() / 2) self.sprites.add(self.ball) self.score_left = 0 self.score_right = 0 self.init_ball() def init_ball(self): self.ball.rect.center = (self.screen.get_width() / 2, self.screen.get_height() / 2) self.ball.x_speed = random.choice([-1, 1]) * 5 self.ball.y_speed = random.randint(-5, 5) def on_key_up(self, event): if event.key in [pygame.K_s, pygame.K_x]: self.paddle_left.key_up(event.key == pygame.K_s) elif event.key in[pygame.K_UP, pygame.K_DOWN]: self.paddle_right.key_up(event.key == pygame.K_UP) def on_key_down(self, event): if event.key in [pygame.K_s, pygame.K_x]: self.paddle_left.key_down(event.key == pygame.K_s) elif event.key in[pygame.K_UP, pygame.K_DOWN]: self.paddle_right.key_down(event.key == pygame.K_UP) elif event.key == pygame.K_ESCAPE: self.running = False def start(self): self.running = True while self.running: self.clock.tick(self.fps) self.handle_events() self.update() self.draw() pygame.quit() def handle_events(self): for event in pygame.event.get(): if event.type == pygame.QUIT: self.running = False break; elif event.type == pygame.KEYDOWN: self.on_key_down(event) elif event.type == pygame.KEYUP: self.on_key_up(event) def update(self): self.sprites.update() if self.ball.rect.right < 0: self.score_right += 1 self.init_ball() elif self.ball.rect.left > self.screen.get_width(): self.score_left += 1 self.init_ball() elif self.ball.rect.top < 0 and self.ball.y_speed < 0: self.ball.y_speed *= -1; elif self.ball.rect.bottom > self.screen.get_height() and self.ball.y_speed > 0: self.ball.y_speed *= -1; paddles_hit = pygame.sprite.spritecollide(self.ball, self.paddles, False) if paddles_hit: paddle_hit = paddles_hit[0] if (paddle_hit == self.paddle_left and self.ball.x_speed < 0) or \ (paddle_hit == self.paddle_right and self.ball.x_speed > 0): self.ball.x_speed *= -1.05 if abs(self.ball.y_speed) < 2: self.ball.y_speed = math.copysign(2, self.ball.y_speed) def draw(self): self.screen.fill(self.background) self.sprites.draw(self.screen) pygame.display.flip() if __name__ == '__main__': pong = Pong() pong.start()
