# A3DUnitGetFromEnum

A3DDouble `A3DUnitGetFromEnum`(A3DEUnits eUnit)
  `A3DDouble` A3DUnitGetFromEnum(`A3DEUnits` eUnit)

  Converts a units representation from `A3DEUnits`to its `A3DDouble`representation.

  The returned value expresses the input unit in factor of millimeters, as stated in the documentation of `A3DEUnits`.

  If `eUnit`is `kA3DUnitUnknown`or any value outside of `A3DEUnits`enumerator, the function defaults to returning 1.0(millimeters).

  Parameters

  > eUnit: A unit enum

  Returns

  > A unit enumeration value.

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