vispy：如何仅画四分之一的飞机

Question

我只想显示飞机的四分之一，有什么方法可以做到吗？我已经尝试了visuals.plane（）的所有选项，但没有成功。我还试图更改顶点的值['color']，结果是相同的。这是我的代码：

import vispy
from vispy import geometry
from vispy.scene import visuals, widgets
from vispy.scene.cameras import TurntableCamera
from vispy.scene import SceneCanvas

class Vis():
    def __init__(self):  
        self.canvas = SceneCanvas(keys='interactive', title='vispy', show=True, size=(1280, 720))
        self.canvas.events.key_press.connect(self._key_press)
        self.grid = self.canvas.central_widget.add_grid()
        self.view = widgets.ViewBox(parent=self.canvas.scene,
                                camera=TurntableCamera(distance=10.0))
        self.grid.add_widget(self.view)
        visuals.XYZAxis(parent=self.view.scene)
        vertices, faces, outline = geometry.create_plane(width=2,
                                                        height=2,
                                                        direction='+z', width_segments=1, height_segments=1)
        self.floor = visuals.Plane(width=2,
                                 height=2,
                                 width_segments=1, height_segments=1,
                                 vertex_colors=vertices['color'], edge_color='k', direction='+z',
                                 parent=self.view.scene)

    def run(self):
        self.canvas.app.run()

    def _key_press(self, event):
        if event.key == 'Q':
            self.destroy()

    def destroy(self):
        self.canvas.close()
        vispy.app.quit()

if __name__ == "__main__":
    vis = Vis()
    vis.run()