每次移动操纵杆时更改矩形的图像源

2024-03-28 20:01:23 发布

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我在Kivy中创建了自己的操纵杆,每当我移动它时,角色也会移动。我想要它,这样每当我移动时,矩形(角色)的源图像就会改变,使它看起来像是在行走,但在这段代码中,只有当我将操纵杆放在某个方向时,它才会改变。有可能吗

还有一个问题,我想让角色在操纵杆处于边缘时仍在移动,在这段代码中,每当我停止移动操纵杆时,它也会停止

这里是main.py

class Controller(Widget):
    control = ObjectProperty(None)
    def __init__(self, **kwargs):
        super(Controller, self).__init__(**kwargs)

        with self.canvas:
             self.rect = Rectangle(pos=(300, 300), size=(50, 50))

    def on_touch_move(self, touch):
        addx = int(touch.x)-50
        addy = int(touch.y)-50
        print(str(addx) + " " + str(addy))
        self.control.size = 95, 95
        if addx >= 90:
            addx = 90
        if addy >= 90:
            addy = 90
        if addx <= 10:
            addx = 10
        if addy <= 10:
            addy = 10

        if addx > 50:
            self.rect.pos = self.rect.pos[0] + 2, self.rect.pos[1]
            self.rect.source = "assets/faceleft_rightfootinfront.png"
        if addy > 50:
            self.rect.pos = self.rect.pos[0], self.rect.pos[1] + 2
            self.rect.source = "assets/faceleft_leftfootinfront.png"
        if addx < 50:
            self.rect.pos = self.rect.pos[0] - 2, self.rect.pos[1]
            self.rect.source = "assets/faceright_leftfootinfront.png"
        if addy < 50:
            self.rect.pos = self.rect.pos[0], self.rect.pos[1] - 2
            self.rect.source = "assets/faceright_rightfootinfront.png"

        self.control.pos = addx, addy

    def on_touch_down(self, touch):
        pass     # Overriding so it doesnt turn blue

    def on_touch_up(self, touch):
        self.control.pos = (50, 50)    # Return to original position
        self.control.size = 100, 100

此处main.kv

<Controller>
control: control
Button:
    id: control
    background_normal: "assets/controller.png"
    pos: 50, 50
<Character>
character: character
Rectangle:
    id: character
    size: 25, 25
    pos: 400, 400

1条回答
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1楼 · 发布于 2024-03-28 20:01:23

您的self.rect.source在每次鼠标移动时都会更改两次,因此只有最后一次更改才会生效。在if addxif addy条件系列中,其中两个条件每次都是True。也许确定self.rect.source更改的不同代码块会更好

为了让运动继续,您只需要使用Clock.schedule_interval()来安排连续运动。下面是Controller类的一个修改版本,它可以:

class Controller(Widget):
    control = ObjectProperty(None)
    def __init__(self, **kwargs):
        super(Controller, self).__init__(**kwargs)
        self.sched = None

        with self.canvas:
            Color(1,0,0,1)
            self.rect = Rectangle(pos=(300, 300), size=(50, 50))

    def on_touch_move(self, touch):
        if self.sched is not None:   # cancel motion
            self.sched.cancel()
            self.sched = None
        addx = int(touch.x)-50
        addy = int(touch.y)-50
        print(str(addx) + " " + str(addy))
        self.control.size = 95, 95
        if addx >= 90:
            addx = 90
        if addy >= 90:
            addy = 90
        if addx <= 10:
            addx = 10
        if addy <= 10:
            addy = 10

        self.move_it(addx, addy, 0)  # without this the image will only move when mouse motion stops

        self.sched = Clock.schedule_interval(partial(self.move_it, addx, addy), 0.05)

        self.control.pos = addx, addy

    def move_it(self, addx, addy, dt):
        if addx > 50:
            self.rect.pos = self.rect.pos[0] + 2, self.rect.pos[1]
            self.rect.source = "back.png"
        if addy > 50:
            self.rect.pos = self.rect.pos[0], self.rect.pos[1] + 2
            self.rect.source = "forward.png"
        if addx < 50:
            self.rect.pos = self.rect.pos[0] - 2, self.rect.pos[1]
            self.rect.source = "back.png"
        if addy < 50:
            self.rect.pos = self.rect.pos[0], self.rect.pos[1] - 2
            self.rect.source = "forward.png"

    def on_touch_down(self, touch):
        pass     # Overriding so it doesnt turn blue

    def on_touch_up(self, touch):
        if self.sched is not None:   # cancel motion
            self.sched.cancel()
            self.sched = None
        self.control.pos = (50, 50)    # Return to original position
        self.control.size = 100, 100

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