Aleksandr Chernykh's questions

我的游戏中的物体是一颗小行星。按照惯例，它应该从地图的右边缘向左移动。当我添加旋转功能时，问题就开始出现了，物体开始急促地移动。图像中心的矩形。将 convert_alpha() 更改为 convert() 后，我发现图像周围的区域围绕图像中心增大而减小，这会产生“抖动”，但我不知道如何修复它。如果有人能帮助我让“小行星”以恒定的速度移动，我将非常感激。

import pygame
import sys
import time

from random import choice, randint

class BG(pygame.sprite.Sprite):
    def __init__(self, groups, scale_factor):
        super().__init__(groups)
        # Изображение заднего фона
        bg_image = pygame.image.load('../graphics/environment/background.png').convert()

        full_height = bg_image.get_height() * scale_factor
        full_width = bg_image.get_width() * scale_factor
        full_size_image = pygame.transform.scale(bg_image, (full_width, full_height))

        self.image = pygame.Surface((full_width * 2, full_height))
        self.image.blit(full_size_image, (0, 0))
        self.image.blit(full_size_image, (full_width, 0))

        self.rect = self.image.get_rect(topleft = (0, 0))
        self.pos = pygame.math.Vector2(self.rect.topleft)

    def update(self, dt):
        self.pos.x -= 300 * dt
        if self.rect.centerx <= 0:
            self.pos.x = 0
        self.rect.x = round(self.pos.x)

class Asteroid(pygame.sprite.Sprite):
    def __init__(self, groups, scale_factor):
        super().__init__(groups)
        self.sprite_type = 'obstacle'
        self.clock = pygame.time.Clock()
        #rotate
        #Вращение Астероида (изменяется в def rotate)
        self.direction = 0
        #Скорость астероида
        self.speed = 400
        #frame
        self.import_frames(scale_factor)
        self.frame_index = 0
        self.image = self.frames[self.frame_index]

        #Координаты Астероида
        orientation = choice(('up', 'mid', 'down'))
        self.x = 480 + randint(40, 100)

        if orientation == 'up':

            self.y = randint(100,200)
            self.rect = self.image.get_rect(center = (self.x, self.y))

        elif orientation == 'mid':
            self.y = randint(300,400)
            self.rect = self.image.get_rect(center=(self.x, self.y))

        else:
            self.y  = randint(500,600)
            self.rect = self.image.get_rect(center = (self.x, self.y))

        self.pos = pygame.math.Vector2(self.rect.center)

    def import_frames(self, scale_factor):
        self.frames = []
        # Изображение Астероида
        surf = pygame.image.load(f'../graphics/obstacles/0.png').convert_alpha()
        scaled_surface = pygame.transform.scale(surf, pygame.math.Vector2(surf.get_size()) * scale_factor)
        self.frames.append(scaled_surface)

    def animate(self, dt):
        self.frame_index += 10 * dt
        if self.frame_index >= len(self.frames):
            self.frame_index = 0
        self.image = self.frames[int(self.frame_index)]

    def rotate(self):
        self.image = pygame.transform.rotate(self.image, self.direction)
        self.rect = self.image.get_rect(center=(self.x, self.y))
        #self.rect = self.image.get_rect(center = self.image.get_rect(center = (round(self.x), round(self.y))).center)
        self.direction += 1

        #mask
        self.mask = pygame.mask.from_surface(self.image)

    def update(self, dt):
        self.animate(dt)
        self.rotate()
        self.pos.x -= self.speed * dt
        self.rect.x = round(self.pos.x)

        if self.rect.right <= -100:
            self.kill()

class Game:
    def __init__(self):
        # setup
        pygame.init()
        self.display_surface = pygame.display.set_mode((480, 800), vsync=1)
        pygame.display.set_caption('SC')
        self.clock = pygame.time.Clock()
        self.active = True

        # sprite groups
        self.all_sprites  = pygame.sprite.Group()
        self.collision_sprites = pygame.sprite.Group()

        # scale factor
        bg_height = pygame.image.load('../graphics/environment/background.png').get_height()
        self.scale_factor = 800 / bg_height

        BG(self.all_sprites, self.scale_factor)

        # timer
        self.obstacle_timer = pygame.USEREVENT + 1
        pygame.time.set_timer(self.obstacle_timer, 1400)


    def run(self):
        last_time = time.time()
        while True:

            # delta time
            dt = time.time() - last_time
            last_time = time.time()

            # event loop
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    sys.exit()
                if event.type == self.obstacle_timer and self.active:
                    Asteroid([self.all_sprites, self.collision_sprites], self.scale_factor)

            # game logic
            self.all_sprites.update(dt)
            self.all_sprites.draw(self.display_surface)

            pygame.display.update()
            self.clock.tick(120)

if __name__ == '__main__':
    game = Game()
    game.run()