C# Quaternionen an Objekt in XAML

<Viewport3D Margin="4,43,4,-17" MinHeight="200" MinWidth="200" Width="328">

        <Viewport3D.Children>

            <ModelVisual3D>

                <ModelVisual3D.Content>

                    <Model3DGroup x:Name="Cube">

                        <AmbientLight Color="Gray"/>

                        <DirectionalLight Color="Gray" Direction="1,-2,-3"/>

                        <DirectionalLight Color="Gray" Direction="-1,2,-3"/>

                        <GeometryModel3D x:Name="Vorne">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Blue"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="1,1,1     -1,1,1  -1,-1,1     1,-1,1"

                                                            TriangleIndices="0 1 2 0 2 3"/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <GeometryModel3D x:Name="Hinten">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Cyan"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="-1,-1,-1     -1,1,-1     1,1,-1      1,-1,-1 "

                                                            TriangleIndices="0 1 2 0 2 3"/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <GeometryModel3D x:Name="Oben">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Red"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="1,1,-1    -1,1,-1     -1,1,1  1,1,1"

                                                           TriangleIndices="0 1 2 0 2 3"/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <GeometryModel3D x:Name="Unten">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Magenta"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="-1,-1,1  1,-1,1      1,-1,-1     -1,-1,-1"

                                                           TriangleIndices="3 2 0 2 1 0"/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <GeometryModel3D x:Name="Rechts">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Green"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="1,-1,1    1,-1,-1     1,1,-1  1,1,1"

                                                            TriangleIndices="0 1 2 0 2 3 "/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <GeometryModel3D x:Name="Links">

                            <GeometryModel3D.Material>

                                <DiffuseMaterial Brush="Yellow"/>

                            </GeometryModel3D.Material>

                            <GeometryModel3D.Geometry>

                                <MeshGeometry3D Positions="-1,-1,1      -1,1,1      -1,1,-1     -1,-1,-1"

                                                            TriangleIndices="0 1 2 0 2 3"/>

                            </GeometryModel3D.Geometry>

                        </GeometryModel3D>

                        <Model3DGroup.Transform>

                            <Transform3DGroup>

                                <RotateTransform3D>

                                    <RotateTransform3D.Rotation>

                                        <QuaternionRotation3D x:Name="myQuaternionRotation3D" Quaternion="{Binding Path=Quaternionen,Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"  />

                                    </RotateTransform3D.Rotation>

                               </RotateTransform3D>

                            </Transform3DGroup>

                        </Model3DGroup.Transform>

                    </Model3DGroup>

                </ModelVisual3D.Content>

    </ModelVisual3D>

    <ModelVisual3D>

        <ModelVisual3D.Content>

            <DirectionalLight x:Name="dirLghtMain" Direction="-1,-0,-2" Color="Gray"></DirectionalLight>

        </ModelVisual3D.Content>

    </ModelVisual3D>

    </Viewport3D.Children>

    <Viewport3D.Camera>

        <PerspectiveCamera Position="2,4,6" LookDirection="-1,-2,-3" UpDirection="0,1,0" FieldOfView="60"></PerspectiveCamera>

    </Viewport3D.Camera>

    </Viewport3D>

 private void Quats (string[] text)

        {

            try

            {

                double r = Convert.ToDouble(text[0]);

                double x = Convert.ToDouble(text[1]);

                double y = Convert.ToDouble(text[2]);

                double z = Convert.ToDouble(text[3]);

                Quaternion endQuaternion = new Quaternion(r, x, y, z);

                myQuaternionRotation3D = new QuaternionRotation3D(endQuaternion);

            }

            catch(Exception)

            {

            } 

        }