title: How do I convert between 2D paper space coordinates world 3D coordinates for AEC models in a forge viewer?
body: <p>I'm following a blog <a href="https://forge.autodesk.com/ja/node/1765" rel="nofollow noreferrer">post</a> by Petr Broz with my published views from a Revit project in BIM 360, but I was wondering how I would convert between 2D coordinates and 3D world coordinates if my published 2D view is actually just a stand-alone floor plan view without being placed on any sheet.</p>
  <p>I was trying to get the viewport but I realized the published view doesn't have any viewport in the model. So I cannot actually use those functions in the extension for viewports. Any advise would be greatly appreciated.</p>