kivy中的射击游戏

Question

我目前正在 python kivy 中制作简单的射击游戏。 我的角色在移动，但是当按下空格键时，子弹在同一个 position 中生成。 所以子弹没有映射到角色上。 我尝试将子弹创建为 class 但没有帮助。 我会很高兴得到任何帮助。 这是我的代码：

    def __init__(self, *args, **kwargs):
        super(Auto,self).__init__(*args,**kwargs)
        self.rect = Rectangle(size = (150, 150), pos = (0, 0), source = "spriteshd00.png")
        self.canvas.add(self.rect)

    def pohyb(self, vector):
        self.rect.pos = Vector(self.rect.pos) + Vector(vector)

class Hra(BoxLayout):
    def __init__(self, *args, **kwargs):
        super(Hra,self).__init__(*args,**kwargs)
        self.orientation = "vertical"
        self.car = Auto(size_hint = (1,.9))
        self.bullet = Rectangle(pos=(0,0), size=(20, 5))
        Clock.schedule_interval(self.movebullet, .025)
        self.add_widget(self.car)
        ovladaci_panel_obal = BoxLayout(orientation = "horizontal", size_hint = (1,.1))
        self.up_btn = ToggleButton(text = "Up", group = "smer")
        self.up_btn.bind(state = self.on_state)
        ovladaci_panel_obal.add_widget(self.up_btn)
        self.left_btn = ToggleButton(text = "Left", group = "smer")
        self.left_btn.bind(state = self.on_state)
        ovladaci_panel_obal.add_widget(self.left_btn)
        self.down_btn = ToggleButton(text = "Down", group = "smer")
        self.down_btn.bind(state = self.on_state)
        ovladaci_panel_obal.add_widget(self.down_btn)
        self.right_btn = ToggleButton(text = "Right", group = "smer")
        self.right_btn.bind(state = self.on_state)
        ovladaci_panel_obal.add_widget(self.right_btn)
        self.add_widget(ovladaci_panel_obal)
        # Připojíme klávesnici k aplikaci
        self.Keyboard = Window.request_keyboard(self._keyboard_closed,self,'text')
        self.Keyboard.bind(on_key_down = self._on_keyboard_down)
        self.Keyboard.bind(on_key_up = self._on_keyboard_up)
        self.Keyboard.bind(on_key_up=self.shoot)

    def _keyboard_closed(self):
        #Funkce už nebude volána při stisku klávesy
        self.Keyboard.unbind(on_key_down = self._on_keyboard_down())
        self.Keyboard.unbind(on_key_up=self._on_keyboard_down())
        self.Keyboard.unbind(on_key_up=self.shoot())
        self.Keyboard = None #odstraneni klavesnice

    def _on_keyboard_down(self, keyboard, keycode, text, modifiers):
        if(keycode[1] == "up"):
            self.reset_state()#resetovani stavu tlacitek
            self.up_btn.state = "down"
        elif(keycode[1] == "left"):
            self.reset_state()#resetovani stavu tlacitek
            self.left_btn.state = "down"
        elif(keycode[1] == "right"):
            self.reset_state()#resetovani stavu tlacitek
            self.right_btn.state = "down"
        elif(keycode[1] == "down"):
            self.reset_state()#resetovani stavu tlacitek
            self.down_btn.state = "down"
        if(keycode[1] == "escape"):
            keyboard.release()#stisknu escape a aplikace prestane fungovat
        return True

    def _on_keyboard_up(self,keyboard, keycode):
        self.reset_state()

    def movebullet(self, *args):
        y = self.car.pos[1]*3 + self.car.pos[0]*3
        x = self.bullet.pos[0] + 15
        #self.bullet.pos = self.car.pos
        self.bullet.pos = (x,y) #tahle konfiiguarce umozni jit kulce horizontalne
        #blx, bly = self.ball.pos
        # Check for hit. Ball size is 15. Bullet size is 5.
        #if (x + 5 > blx and x < blx + 15 and y > bly and y < 400):
            #self.canvas.remove(self.ball)
            #self.newball()
            #self.lblRes.text = str(int(self.lblRes.text) + 100)

    def shoot(self, keyboard, keycode):
        if (keycode[1] == 'spacebar'):
            with self.canvas:
                Color(0, 0, 0, 1, mode="rgba")
                self.bullet = Rectangle(pos= (300, 0), size=(20, 5))
                g1 = self.car.pos[0] + 15
                g2 = self.car.pos[1] + 15
                self.bullet.pos = (g1, g2)

    def reset_state(self):
        self.up_btn.state = "normal"
        self.left_btn.state = "normal"
        self.down_btn.state = "normal"
        self.right_btn.state = "normal"

    def on_state(self, obj, state):
        if(obj.text == "Up"):
            if(state == "down"):
                self.timer = Clock.schedule_interval(lambda dt: self.car.pohyb((0, 1)), 0.01)
                #self.auto.rect.source = "up.png" # Změníme obrázek
            if(state == "normal"):
                #Zastavíme timer
                Clock.unschedule(self.timer)
        elif(obj.text == "Left"):
            if(state == "down"):
                self.timer = Clock.schedule_interval(lambda dt: self.car.pohyb((-1, 0)), 0.01)
                #self.car.rect.source = "left.png" # Změníme obrázek
            if(state == "normal"):
                Clock.unschedule(self.timer)
        elif(obj.text == "Down"):
            if(state == "down"):
                self.timer = Clock.schedule_interval(lambda dt: self.car.pohyb((0, -1)), 0.01)
                #self.car.rect.source = "down.png" # Změníme obrázek
            if(state == "normal"):
                Clock.unschedule(self.timer)
        elif(obj.text == "Right"):
            if(state == "down"):
                self.timer = Clock.schedule_interval(lambda dt: self.car.pohyb((1, 0)), 0.01)
                #self.car.rect.source = "right.png" # Změníme obrázek
            if(state == "normal"):
                Clock.unschedule(self.timer)

class MainApp(App):
    def build(self):
        Window.clearcolor = (1,1,1,1)
        return Hra()

root = MainApp()
root.run()``

Answer 1

看起来您的Auto实例的大小几乎与Hra ( size_hint = (1,.9) ) 一样大，并且您的Bullet position 是基于Auto实例的 position 的。 您的Up 、 Left 、 Right和Down按钮正在移动在Canvas上绘制的Rectangle ，但对Auto实例的实际 position 没有影响。 所以你的Bullet总是在同一个 position 上创建（ Auto position 永远不会改变）。 解决它的一种方法是使Bullet position 改为依赖于Rectangle 。 像这样：

def movebullet(self, *args):
    y = self.car.rect.pos[1]  # use position of Rectangle
    x = self.bullet.pos[0] + 15
    #self.bullet.pos = self.car.pos
    self.bullet.pos = (x,y) #tahle konfiiguarce umozni jit kulce horizontalne

和

def shoot(self, keyboard, keycode):
    if (keycode[1] == 'spacebar'):
        with self.canvas:
            Color(0, 0, 0, 1, mode="rgba")
            self.bullet = Rectangle(pos= (300, 0), size=(20, 5))
            
            # use position of Rectangle
            g1 = self.car.rect.pos[0] + 15
            g2 = self.car.rect.pos[1] + 15
            self.bullet.pos = (g1, g2)