如何解决具有ModelVisual3D属性绑定的WPF ViewPort3D用户控件？
| 我正在构建一个具有ViewPort3D的用户控件。我希望能够使用ModelVisual3D的绑定属性更新视图端口（通过一种接受方法，该方法接受用于创建可视模型的数据）。为了尝试用户控件，我也尝试在窗口中使用它。 我相信我在绑定方面缺少一些东西，想知道是否有人可以通过指出我所缺少的东西来帮助我。 这是我的代码： 用户控件<UserControl x:Class=\"TheProject.TheUserControl\"
xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"
xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\"
xmlns:mc=\"http://schemas.openxmlformats.org/markup-compatibility/2006\"
xmlns:d=\"http://schemas.microsoft.com/expression/blend/2008\"
mc:Ignorable=\"d\"
x:Name=\"ThisUserControl\"
d:DesignHeight=\"300\" d:DesignWidth=\"300\">
<Grid>
<Viewport3D Name=\"mainViewPort\" ClipToBounds=\"True\">
<Viewport3D.Camera>
<PerspectiveCamera
FarPlaneDistance=\"100\"
LookDirection=\"-11,-10,-9\"
UpDirection=\"0,1,0\"
NearPlaneDistance=\"2\"
Position=\"11,10,9\"
FieldOfView=\"70\" />
</Viewport3D.Camera>
<Viewport3D.Children>
<ModelVisual3D Content=\"{Binding Path=Model,ElementName=ThisUserControl}\" />
<ModelVisual3D>
<ModelVisual3D.Content>
<DirectionalLight
Color=\"White\"
Direction=\"-2,-3,-1\">
</DirectionalLight>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D.Children>
</Viewport3D>
</Grid>
</UserControl>
using System.Windows.Media;
using System.Windows.Media.Media3D;
using System.ComponentModel;
namespace TheProject
{
public partial class TheUserControl : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler(this,new PropertyChangedEventArgs(name));
}
private ModelVisual3D _model;
protected ModelVisual3D Model
{
get { return this._model; }
set
{
this._model = value;
OnPropertyChanged(\"Model\");
}
}
public void SetTheData(ITheData theData)
{
if (theData != null)
{
this.Model = SimpleTriangleModel(theData);
}
}
private static ModelVisual3D SimpleTriangleModel(ITheData theData)
{
var point0 = new Point3D(theData.X,0);
var point1 = new Point3D(0,theData.Y,0);
var point2 = new Point3D(0,theData.Z);
return new ModelVisual3D
{
Content = CreateTriangleModel(point0,point1,point2,new SolidColorBrush(Colors.Tomato))
};
}
public static Model3DGroup CreateTriangleModel(Point3D p0,Point3D p1,Point3D p2,Brush brush)
{
var mesh = new MeshGeometry3D();
mesh.Positions.Add(p0);
mesh.Positions.Add(p1);
mesh.Positions.Add(p2);
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(1);
mesh.TriangleIndices.Add(2);
Vector3D normal = CalculateNormal(p0,p1,p2);
mesh.Normals.Add(normal);
mesh.Normals.Add(normal);
mesh.Normals.Add(normal);
Material material = new DiffuseMaterial(brush);
var model = new GeometryModel3D(mesh,material);
var group = new Model3DGroup();
group.Children.Add(model);
return group;
}
public static Vector3D CalculateNormal(Point3D p0,Point3D p2)
{
var v0 = new Vector3D(p1.X - p0.X,p1.Y - p0.Y,p1.Z - p0.Z);
var v1 = new Vector3D(p2.X - p1.X,p2.Y - p1.Y,p2.Z - p1.Z);
return Vector3D.CrossProduct(v0,v1);
}
}
}
namespace TheProject
{
public interface ITheData
{
double X { set; get; }
double Y { set; get; }
double Z { set; get; }
}
}
<Window x:Class=\"TheProject.TheWindow\"
xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"
xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\"
xmlns:local=\"clr-namespace:TheProject\"
Title=\"The Window\" Height=\"416\" Width=\"649\">
<Grid>
<local:TheUserControl x:Name=\"TheUserControl1\" VerticalAlignment=\"Stretch\" HorizontalAlignment=\"Stretch\" />
</Grid>
</Window>
using System.Windows;
namespace TheProject
{
public partial class TheWindow : Window
{
private class DataClass : ITheData
{
public double X { get; set; }
public double Y { get; set; }
public double Z { get; set; }
}
public TheWindow()
{
InitializeComponent();
ITheData newData = new DataClass { X = 3,Y = 2,Z = 1 };
this.TheUserControl1.SetTheData(newData);
this.DataContext = this;
}
}
}
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