C#如何使用Caliburn.Micro将WPF GeometryModel3D绑定到ViewModel

using Caliburn.Micro;
using System.Windows.Media.Media3D;

namespace YourNamespace
{
    public class MainViewModel : Screen
    {
        private GeometryModel3D _model;

        public GeometryModel3D Model
        {
            get { return _model; }
            set
            {
                _model = value;
                NotifyOfPropertyChange(() => Model);
            }
        }

        public MainViewModel()
        {
            // 在构造函数中初始化模型数据
            // 例如，创建一个立方体模型
            Model = new GeometryModel3D
            {
                Geometry = new MeshGeometry3D
                {
                    Positions = new Point3DCollection
                    {
                        new Point3D(-1, -1, -1),
                        new Point3D(1, -1, -1),
                        new Point3D(1, 1, -1),
                        new Point3D(-1, 1, -1),
                        new Point3D(-1, -1, 1),
                        new Point3D(1, -1, 1),
                        new Point3D(1, 1, 1),
                        new Point3D(-1, 1, 1)
                    },
                    TriangleIndices = new Int32Collection
                    {
                        0, 1, 2, 0, 2, 3, // 前面
                        1, 5, 6, 1, 6, 2, // 右面
                        5, 4, 7, 5, 7, 6, // 后面
                        4, 0, 3, 4, 3, 7, // 左面
                        3, 2, 6, 3, 6, 7, // 顶面
                        0, 4, 5, 0, 5, 1  // 底面
                    }
                },
                Material = new DiffuseMaterial(Brushes.Blue)
            };
        }
    }
}

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:cal="http://www.caliburnproject.org"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Viewport3D>
            <Viewport3D.Resources>
                <Style TargetType="ModelVisual3D">
                    <Setter Property="Visual3DModel" Value="{Binding Model}" />
                </Style>
            </Viewport3D.Resources>
            <cal:Bind.Model="{Binding}" />
        </Viewport3D>
    </Grid>
</Window>

using System.Windows;

namespace YourNamespace
{
    public partial class App : Application
    {
        private void Application_Startup(object sender, StartupEventArgs e)
        {
            var viewModel = new MainViewModel();
            var view = new MainWindow
            {
                DataContext = viewModel
            };
            view.Show();
        }
    }
}