# A3DETessellationLevelOfDetail

enum `A3DETessellationLevelOfDetail`

  Structure to specify the level of detail of the tessellation.

  See `A3DRWParamsTessellationData`parameters. When a level is given, the Chord Height Ratio (`A3DRWParamsTessellationData::m_dChordHeightRatio`) and Wireframe Chord Angle (`A3DRWParamsTessellationData::m_dAngleToleranceDeg`) change to preset values for the selected level.

  > 3.0

  ## Index

  Enumerators

  - `kA3DTessLODExtraLow`
  - `kA3DTessLODLow`
  - `kA3DTessLODMedium`
  - `kA3DTessLODHigh`
  - `kA3DTessLODExtraHigh`
  - `kA3DTessLODUserDefined`

Enumerators

enumerator `kA3DTessLODExtraLow`
  kA3DTessLODExtraLow

  Extra Low level: when selected, these members are automatically defined with the following values:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`= 50,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`= 40.

enumerator `kA3DTessLODLow`
  kA3DTessLODLow

  Low level: when selected, these members are automatically defined with the following values:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`= 600,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`= 40.

enumerator `kA3DTessLODMedium`
  kA3DTessLODMedium

  Medium level: when selected, these members are automatically defined with the following values:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`= 2000,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`= 40.

enumerator `kA3DTessLODHigh`
  kA3DTessLODHigh

  High level: when selected, these members are automatically defined with the following values:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`= 5000,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`= 30.

enumerator `kA3DTessLODExtraHigh`
  kA3DTessLODExtraHigh

  Extra High level: when selected, these members are automatically defined with the following values:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`= 10000,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`= 20.

enumerator `kA3DTessLODUserDefined`
  kA3DTessLODUserDefined

  User Defined level: when selected, these members should be defined:

  - `A3DRWParamsTessellationData::m_dChordHeightRatio`if `A3DRWParamsTessellationData::m_bUseHeightInsteadOfRatio`is set to false,
  - `A3DRWParamsTessellationData::m_dMaxChordHeight`if `A3DRWParamsTessellationData::m_bUseHeightInsteadOfRatio`is set to true,
  - `A3DRWParamsTessellationData::m_dAngleToleranceDeg`. Be very careful when using `A3DRWParamsTessellationData::m_dMaxChordHeight`because a too small value would generate a huge tessellation.

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