# A3DEReadGeomTessMode

enum `A3DEReadGeomTessMode`

  A3DSDKReadWrite.

  ReadingMode of the model file. Set which kind of content should be read.

  > 3.0

  ## Index

  Enumerators

  - `kA3DReadGeomOnly`
  - `kA3DReadGeomAndTess`
  - `kA3DReadTessOnly`

Enumerators

enumerator `kA3DReadGeomOnly`
  kA3DReadGeomOnly = `0`

  In this mode, Exchange will avoid reading or generating tessellation on B-rep.

  Faceted elements from the native file will still be imported.

enumerator `kA3DReadGeomAndTess`
  kA3DReadGeomAndTess

  Mixed mode: In this mode, the B-rep and faceted elements are read from the native file.

  Tessellation is then generated from B-rep elements.

enumerator `kA3DReadTessOnly`
  kA3DReadTessOnly

  In this mode, all faceted elements from the native file are read.

  If present, the native tessellation of the B-rep is read exclusively. Native tessellation is the display list integrated in the CAD file (only available for CATIA V5, Solidworks, 3DXML, and Inventor).There are some side effects: The tessellation may be not up-to-date with the geometry, the assembly tree can be different, and hidden objects may be missed.If an element contains only B-rep, tessellation is generated from the B-rep and subsequently the B-rep is removed to save memory.

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