# Transform point from DWG model coordinates to autodesk forge viewer coordinates (new WGS.LmvMatrix4 undefined)

I am trying to display a point on model displayed in the Autodesk forge viewer. However I am unable to figure out how to transform the point. I found the next question that seems to resolve this question:

Transform point from DWG model coordinates to autodesk forge viewer coordinates

When I try to use the function of this question:

var vpXform = viewer.model.getPageToModelTransform(viewportId).clone();
var invVpXform = new WGS.LmvMatrix4(true);

invVpXform.getInverse(vpXform, true);