Helix toolkit Wpf DX, how to load and transform an array of objs?

Question

I have a wpf application, and I am spawning a dynamic point cloud using: xaml:

  <hx:PointGeometryModel3D 
                Geometry="{Binding Points}"
                Transform="{Binding Points1Transform}"
                IsRendering="True"
                FixedSize="True"
                Size="5.5, 5.5" 
                Color="#00FF1B"  />

Code behind:

public PointGeometry3D _Points;

        public PointGeometry3D Points
        {
            get { return _Points; }
            set
            {
                if (_Points != value)
                {
                    _Points = value;
                    OnPropertyChanged(null);
                }
            }
        }
        public Transform3D Points1Transform { get; set; }

Points1Transform = new TranslateTransform3D(0, 0, 0);
Points = new PointGeometry3D { IsDynamic = true, Positions = new Vector3Collection() };
        

and updating the positions on a timer with:

 public void ProcessingEventHandlerMap(object sender, DllFunctions.DenseTrackingFunctions.ProcessingEventArgsMap args)
        {
            try
            {
                if (_Data.GotData == true)
                {

                    Points.ClearAllGeometryData();
                    Points.ClearOctree();
                    Points.Positions.Clear();


                    for (int j = 0; j < _Dense._processingArgsMap.pointData.Count(); j++)
                    {

                        Points.Positions.Add(new Vector3((float)_Dense._processingArgsMap.pointData[j].position[0] * 10, (float)_Dense._processingArgsMap.pointData[j].position[1] * 10, (float)_Dense._processingArgsMap.pointData[j].position[2] * 10));
                        Points.UpdateVertices();

                    }

                }
            }
            catch (Exception e)
            {
                // I broke
            }

        }

This works perfectly, and I now need to replicate it with an obj file, loaded from disk. I have the file loaded as:

HelixToolkit.Wpf.SharpDX.MeshGeometry3D

But how can I spawn an array and dynamically change the transforms?