# Other Structures

The following structures are available globally.

- `MGLSphericalPosition`

  A structure containing information about the position of the light source relative to lit geometries.

  See more

  #### Declaration

  Objective-C

      struct MGLSphericalPosition {}

  Swift

      struct MGLSphericalPosition

  View Source on GitHub

- `MGLTransition`

  A structure containing information about a transition.

  See more

  #### Declaration

  Objective-C

      struct MGLTransition {}

  Swift

      struct MGLTransition

  View Source on GitHub