Vertex format (i.e., the type of data associated with a vertex) represented as a number. 
   Namespace:   Autodesk.Revit.DB.DirectContext3D  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 19.0.0.0 (19.0.0.405) 
  Since:  2017 
Syntax
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Members
| Member name | Description | 
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| Position | Vertex format consisting of a position. | 
| PositionNormal | Vertex format consisting of a position and a normal vector. | 
| PositionColored | Vertex format consisting of a position and a color. | 
| PositionNormalColored | Vertex format consisting of a position, a normal vector, and a color. | 
Remarks
 VertexFormatBits can be used to specify the vertex format in the creation of the following objects:  VertexFormatBits is not to be confused with VertexFormat. The latter type of object is associated with low-level graphics functionality and may become invalid. VertexFormat is needed to submit a set of vertex and index buffers for rendering (see  DrawContext  ).