Pretty much everything is said in the title! So today's post exposes a viewer extension that shows you how to access vertices and facets information of the meshes in a loaded model. Because we are using a custom renderer and some work have been done in order for the viewer to support a very large amount of triangles, the approach is quite different than what you would do from a plain Three.js scene.
Once loaded, the "Autodesk.ADN.Viewing.Extension.MeshData" extension will draw lines and spheres to represent vertices and facets of the selected mesh in your model. Below is a picture of the result and the full source of the sample: