I am trying to create a top-down game in pygame. One of the features is a gun which should point towards the mouse. The first two code snippets below worked perfectly before I implemented the camera with the third snippet.

def angle_to_mouse(self):
        mouse_pos = vec(pygame.mouse.get_pos())
        gun_pos = vec(self.rect.center)

        dx = mouse_pos.x - gun_pos.x
        dy = -(mouse_pos.y - gun_pos.y)
        if dx != 0:
            return math.degrees(math.atan2(dy, dx))

self.image = pygame.transform.rotate(self.base_image, self.angle_to_mouse())

Once I had added the camera the gun started exhibiting strange behavior. If the mouse was ever close to the gun the gun would be stuck and loop between 0 and three degrees.

class CameraGroup(pygame.sprite.Group):
    def __init__(self, target=None, *sprites):
        super().__init__(*sprites)
        self.target = target
        self.offsetx = 0
        self.offsety = 0

    def get_offset(self):
        self.offsetx = WIDTH / 2 - self.target.rect.x
        self.offsety = HEIGHT / 2 - self.target.rect.y
        return vec(self.offsetx, self.offsety)

    def camera_draw(self, screen):
        self.get_offset()
        for sprite in self.sprites():
            offset_pos = (
                round(sprite.rect.x + self.offsetx),
                round(sprite.rect.y + self.offsety),
            )
            screen.blit(sprite.image, offset_pos)

    def set_target(self, sprite):
        self.target = sprite

At first I assumed it was something to do with radians and made sure I converted my angle to degrees. Then I tried subtracting the offset of the camera to gun_pos in the angle_to_mouse method. I did this to try to obtain the “true” position of the gun before the camera changes anything. However the problem persisted.

Any help would be appreciated. Thanks in advance.

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