# GoogleMaps3D Framework Reference

# CollisionBehavior

    enum CollisionBehavior

    extension CollisionBehavior : Equatable, Hashable

- `


  ### [==(_:_:)](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO2eeoiySbAC_ACtFZ)


  ` Returns a Boolean value indicating whether two values are equal.

  Equality is the inverse of inequality. For any values `a` and `b`,
  `a == b` implies that `a != b` is `false`.

  #### Declaration

  Swift

      static func == (a: CollisionBehavior, b: CollisionBehavior) -> Bool

- `


  ### [hash(into:)](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO4hash4intoys6HasherVz_tF)


  ` Hashes the essential components of this value by feeding them into the
  given hasher.

  Implement this method to conform to the `Hashable` protocol. The
  components used for hashing must be the same as the components compared
  in your type's `==` operator implementation. Call `hasher.combine(_:)`
  with each of these components.
  Important

  In your implementation of `hash(into:)`,
  don't call `finalize()` on the `hasher` instance provided,
  or replace it with a different instance.
  Doing so may become a compile-time error in the future.

  #### Declaration

  Swift

      func hash(into hasher: inout Hasher)

- `


  ### [hashValue](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO9hashValueSivp)


  ` The hash value.

  Hash values are not guaranteed to be equal across different executions of
  your program. Do not save hash values to use during a future execution.
  Important
  `hashValue` is deprecated as a `Hashable` requirement. To conform to `Hashable`, implement the `https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior.html#/s:12GoogleMaps3D17CollisionBehaviorO4hash4intoys6HasherVz_tF` requirement instead. The compiler provides an implementation for `hashValue` for you.

  #### Declaration

  Swift

      var hashValue: Int { get }

- `


  ### [optionalAndHidesLowerPriority](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO29optionalAndHidesLowerPriorityyA2CmF)


  ` Specifies that the marker should only be displayed if it does not overlap
  with other markers. If two markers of this type would overlap, the one with
  the higher draw order is shown. If they have the same draw order, the one
  with the lower vertical screen position is shown.

  #### Declaration

  Swift

      case optionalAndHidesLowerPriority

- `


  ### [required](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO8requiredyA2CmF)


  ` Specifies that the marker should always be displayed regardless of
  collision.

  #### Declaration

  Swift

      case required

- `


  ### [requiredAndHidesOptional](https://developers.google.com/maps/documentation/maps-3d/ios-sdk/reference/Enums/CollisionBehavior#/s:12GoogleMaps3D17CollisionBehaviorO24requiredAndHidesOptionalyA2CmF)


  ` Specifies that the marker should always be displayed regardless of
  collision. Markers with OPTIONAL_AND_HIDES_LOWER_PRIORITY collision
  behavior or the default map labels that overlap with this marker will be
  hidden.

  #### Declaration

  Swift

      case requiredAndHidesOptional