我想朝坦克面對(duì)的方向發(fā)射子彈。我使用加速度計(jì)來(lái)控制我的坦克的角度。當(dāng)我傾斜我的設(shè)備時(shí)，我希望我的坦克朝著它所面對(duì)的方向射擊。使用我當(dāng)前的腳本，它只能垂直拍攝。 為了重復(fù)這個(gè)問(wèn)題，我不能縮小我的代碼比這from kivy.app import Appfrom kivy.uix.image import Imagefrom kivy.uix.widget import Widgetfrom kivy.properties import NumericProperty, ReferenceListProperty, ObjectProperty,ListProperty, BooleanPropertyfrom kivy.vector import Vectorfrom kivy.clock import Clockimport randomimport mathfrom plyer import accelerometerfrom kivy.lang import BuilderBuilder.load_string("""<Tank>:    canvas.before:        PushMatrix        Rotate:            angle: self.angle            origin: self.center    canvas.after:        PopMatrix<Flame>:    canvas.before:        PushMatrix        Rotate:            angle: self.angle            origin: self.center    canvas.after:        PopMatrix<AccelerometerGun>:    tank: tank    x_label: x_label    canvas:        Rectangle:            source: "wood.png"            #texture: root.bg_image.texture#source: "images/bg.png"            size: self.size#root.size[0]+200, root.size[1]            pos: self.pos#root.pos    Label:        id: x_label        text: "Tilt value "        center: self.parent.center    Tank:        id: tank        center: (root.width/2, 70) #self.parent.center""") class Flame(Image):    velocity_x = NumericProperty(0)    active = BooleanProperty(False)    velocity_y = NumericProperty(0)    velocity = ReferenceListProperty(velocity_x, velocity_y)    angle = NumericProperty(0)    def __init__(self, **kwargs):        super(Flame, self).__init__(**kwargs)        self.size_hint=(None, None)        self.source = "zn.zip"        self.anim_delay= 0.35        self.anim_loop = 1        rs = random.randint(70, 80)        self.size = (rs, rs)        self.bind(active=self.addV)    def addV(self, *args):注意：我想使用 Vector 而不是 Animation 來(lái)移動(dòng)子彈