</HelixToolkit:HelixViewport3D> 代码端: public class MainViewModel { public Model3D Model { get; set; } public MainViewModel() { // Create a model group Model3DGroup modelGroup = new Model3DGroup(); // Create a mesh builder and add a box to it MeshBuilder meshBuilder = new MeshBuilder(false, false); meshBuilder.AddBox(new Point3D(0, 0, 0), 20, 10, 5); // Create a mesh from the builder (and freeze it) MeshGeometry3D mesh = meshBuilder.ToMesh(true); // Create some materials var blueMaterial = MaterialHelper.CreateMaterial(Colors.Red); var insideMaterial = MaterialHelper.CreateMaterial(Colors.Yellow); // Add model to the group (using the same mesh, that's why we had to freeze it) modelGroup.Children.Add(new GeometryModel3D { Geometry = mesh, Transform = new TranslateTransform3D(60, 0, 60), Material = blueMaterial, BackMaterial = insideMaterial }); // Set the property, which will be bound to the Content property of the ModelVisual3D (see MainWindow.xaml) this.Model = modelGroup; } }