autodesk - 用于导出几何和计算面和顶点的 Navisworks COM API

Question

我正在尝试导出 Navis 中选定对象的顶点、面和颜色。经过一番研究，我发现我们可以使用 Navisworks 提供的 COM API 来做到这一点。我使用 getprimitives 来找到三角形。看起来如下。

'using Autodesk.Navisworks.Api;
using Autodesk.Navisworks.Api.Plugins;
using ComBridge = Autodesk.Navisworks.Api.ComApi.ComApiBridge;
using COMApi = Autodesk.Navisworks.Api.Interop.ComApi;

#region InwSimplePrimitivesCB Class
class CallbackGeomListener : COMApi.InwSimplePrimitivesCB
{
    public void Line(COMApi.InwSimpleVertex v1,
            COMApi.InwSimpleVertex v2)
    {
        // do your work
    }

    public void Point(COMApi.InwSimpleVertex v1)
    {
        // do your work
    }

    public void SnapPoint(COMApi.InwSimpleVertex v1)
    {
        // do your work
    }

    public void Triangle(COMApi.InwSimpleVertex v1,
            COMApi.InwSimpleVertex v2,
            COMApi.InwSimpleVertex v3)
    {
        // do your work
    }


 }
 #endregion

 #region NW Plugin
[PluginAttribute("Test","ADSK",DisplayName= "Test")]
[AddInPluginAttribute(AddInLocation.AddIn)]
public class Class1:AddInPlugin
{
    public override int Execute(params string[] parameters)
    {
        // get the current selection
        ModelItemCollection oModelColl =
            Autodesk.Navisworks.Api.Application.
                ActiveDocument.CurrentSelection.SelectedItems;

        //convert to COM selection
        COMApi.InwOpState oState = ComBridge.State;
        COMApi.InwOpSelection oSel =
                ComBridge.ToInwOpSelection(oModelColl);

        // create the callback object
        CallbackGeomListener callbkListener =
                new CallbackGeomListener();
        foreach (COMApi.InwOaPath3 path in oSel.Paths())
        {
            foreach (COMApi.InwOaFragment3 frag in path.Fragments())
            {
                // generate the primitives
                frag.GenerateSimplePrimitives(
                    COMApi.nwEVertexProperty.eNORMAL, 
                                   callbkListener);
            }
        }

        return 0;
    }
}
  #endregion
'

这里的问题是我无法找到面，我确实使用三角形方法获得了顶点。如果有人知道如何找到物体的面孔和颜色，请告诉我。