Manually animating an object, wpf/SharpDX

I have an obj model that I load, like this:

public HelixToolkit.Wpf.SharpDX.MeshGeometry3D ModelCamera { private set; get; }

var m1 = Load3ds("data\\assets\\CameraMesh.obj");
this.ModelCamera = m1[0].Geometry as HelixToolkit.Wpf.SharpDX.MeshGeometry3D;

I link a transform in the xaml:

 <hx:MeshGeometryModel3D
                x:Name="model1"
                Geometry="{Binding ModelCamera}"
                Material="{Binding MaterialCamera}"
                Transform="{Binding CameraTransform}" />

In the constructer, i can move the object, like this:

var matrixZero = new Matrix3D();
            var transZ = new Vector3D(0, 10, 0);
            var quatZ = new System.Windows.Media.Media3D.Quaternion(0, 0, 0, 1);
            matrixZero.Rotate(quatZ);
            matrixZero.Translate(transZ);
            this.CameraTransform = new System.Windows.Media.Media3D.MatrixTransform3D(matrixZero);

However, when i run this function later on:

       public void SetTransform(double val)
        {

            var matrixZero = new Matrix3D();
            var transZ = new Vector3D(val, 0, 0);
            var quatZ = new System.Windows.Media.Media3D.Quaternion(0, 0.707, 0, 1);
            matrixZero.Rotate(quatZ);
            matrixZero.Translate(transZ);
            this.CameraTransform = new System.Windows.Media.Media3D.MatrixTransform3D(matrixZero);
          
        }

It doesn’t do anything. What am i missing here to move an object from code-behind?

Thanks!

[holance]

Yes, InstanceParam is optional

[holance]

You are binding to CameraTransform property, but you are implementing notification on _CameraTransform.

    private System.Windows.Media.Media3D.MatrixTransform3D _CameraTransform;

    public System.Windows.Media.Media3D.MatrixTransform3D CameraTransform
    {
        get { return _CameraTransform; }
        set
        {
           if(_CameraTransform != value) {
              _CameraTransform= value;
              OnPropertyChanged(nameof(CameraTransform));
           }
        }
    }

Or you can simply inherit a base class for your view model like this: ObservableObject, then

    private System.Windows.Media.Media3D.MatrixTransform3D _CameraTransform;
    public System.Windows.Media.Media3D.MatrixTransform3D CameraTransform
    {
        get { return _CameraTransform; }
        set
        {
            SetValue(ref _CameraTransform, value);
        }
    }