子弹未按初始轨迹飞行[重复]

Question

我一直在构建一个受太空侵略者启发的游戏，并且正忙于构建播放器和子弹组件。我的播放器按预期移动和旋转输入，子弹按初始轨迹发射，但是，在发射子弹后，当我旋转播放器时，子弹在飞行时也会旋转。我知道问题出在哪里，正如您将在我的代码中看到的那样，与子弹相关的角度与用于控制我的播放器的角度相同，并且与每次窗口更新一样，该值应用于子弹的路径.我正在努力寻找将这个角度分配给最初发射的每颗子弹的最佳方法，并且子弹将继续沿着这个初始轨迹前进。我考虑过创建一个数组来存储游戏每个实例的角度，并访问该数组的最新附件以分配给子弹的发射，但这似乎没有必要，因为每个角度只使用一次，所以那里面的内容是没用的。

我想到的另一件事是创造。 bullet 类，其中 bullet 数组的元素有一个 x 和 y 组件（bullet.x 和 bullet.y），具有初始发射条件，但我不太确定如何在不从根本上改变我的代码的情况下实现它。有什么想法吗？

import pygame
import os
import math

clock = pygame.time.Clock()

#standard variables for universal operation
WIDTH = 610
HEIGHT = 760
WIN = pygame.display.set_mode((WIDTH,HEIGHT))
FPS = 60

BORDER = pygame.Rect(0,720,WIDTH,4)

BLACK = (0,0,0)
WHITE = (255,255,255)
GREEN = (0,200,0) #slightly darker green

PLAYER_IMG = pygame.image.load(os.path.join('src', 'player.png'))
PLAYER_VEL = 7
PLAYER_WIDTH = 36
PLAYER_HEIGHT = 22
INIT_PLAYER_ANGLE = 0
ANGULAR_VEL = 5
MAX_ANGLE = 45 #anticlockwise is positive, vice versa

BULLET_VEL = 7
MAX_BULLETS = 3
BULLET_RADIUS = 2

def move_player(player, angle):

    #rotation
    keys_pressed = pygame.key.get_pressed()
    if keys_pressed[pygame.K_RIGHT] and (angle >= -MAX_ANGLE + ANGULAR_VEL):
        angle -= ANGULAR_VEL
    if keys_pressed[pygame.K_LEFT] and (angle <= MAX_ANGLE - ANGULAR_VEL):
        angle += ANGULAR_VEL
    if keys_pressed[pygame.K_UP] or keys_pressed[pygame.K_DOWN]:
        angle = 0

    rotated_img = pygame.transform.rotate(PLAYER_IMG,angle)
    player = rotated_img.get_rect(center=player.center)
    #linear translation
    keys_pressed = pygame.key.get_pressed()
    if (player.x <= WIDTH - PLAYER_WIDTH - PLAYER_VEL) and (keys_pressed[pygame.K_d]):
        player.x += PLAYER_VEL
    if (player.x >= PLAYER_VEL) and (keys_pressed[pygame.K_a]):
        player.x -= PLAYER_VEL

    return player, rotated_img, angle

def fire_bullet(bullets, angle):
    
    for bullet in bullets:
        if angle<0:
            bullet.x += BULLET_VEL*math.sin(math.radians(abs(angle)))
            bullet.y -= BULLET_VEL*math.cos(math.radians(abs(angle)))
        if angle>0:
            bullet.x -= BULLET_VEL*math.sin(math.radians(angle))
            bullet.y -= BULLET_VEL*math.cos(math.radians(angle))
        if angle == 0:
            bullet.y -= BULLET_VEL


def window(player,rotated_img,angle,bullets):
    WIN.fill(BLACK) #background
    pygame.draw.rect(WIN,GREEN,BORDER) #seperation between game and lower info block
    WIN.blit(rotated_img,(player.x,player.y)) #player
    for bullet in bullets:
        pygame.draw.circle(WIN,GREEN,(bullet.centerx,bullet.centery),BULLET_RADIUS) #bullets
    pygame.display.update()

def main():
    player = pygame.Rect(WIDTH/2-PLAYER_WIDTH/2,685,PLAYER_WIDTH,PLAYER_HEIGHT)
    bullets = []
    angle = INIT_PLAYER_ANGLE

    running = True
    while running: #main game loop
        clock.tick(FPS)

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False #breaks loop if window is shut by user

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_SPACE:
                    bullet = pygame.Rect(player.x+PLAYER_WIDTH/2-BULLET_RADIUS/2,player.y+BULLET_RADIUS*2,BULLET_RADIUS*2,BULLET_RADIUS*2)
                    bullets.append(bullet)
        
        fire_bullet(bullets,angle)
        player, rotated_img, angle = move_player(player,angle)
        window(player,rotated_img,angle,bullets)

    pygame.quit()

if __name__ == "__main__":
    main()