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C++ type conversions

These functions expose allowable type conversions as C++ helper functions.

This avoids having to explicitly reinterpret_cast in most cases.

Note: These functions only change the type of a pointer; they do not change the reference count of the referenced objects.

Note: There is no runtime checking that casts are correct. When downcasting ArTrackable, call ArTrackable_getType beforehand to figure out the correct cast.

Summary

Functions
`ArAsAugmentedImage(ArTrackable *trackable)`	`ArAugmentedImage *` Downcasts to `ArAugmentedImage`.
`ArAsFace(ArTrackable *trackable)`	`ArAugmentedFace *` Downcasts to `ArAugmentedFace`.
`ArAsFuture(ArHostCloudAnchorFuture *future)`	`ArFuture *` Upcasts to `ArFuture`.
`ArAsFuture(ArResolveCloudAnchorFuture *future)`	`ArFuture *` Upcasts to `ArFuture`.
`ArAsFuture(ArResolveAnchorOnTerrainFuture *future)`	`ArFuture *` Upcasts to `ArFuture`.
`ArAsFuture(ArResolveAnchorOnRooftopFuture *future)`	`ArFuture *` Upcasts to `ArFuture`.
`ArAsFuture(ArVpsAvailabilityFuture *future)`	`ArFuture *` Upcasts to `ArFuture`.
`ArAsInstantPlacementPoint(ArTrackable *trackable)`	`ArInstantPlacementPoint *` Downcasts to `ArInstantPlacementPoint`.
`ArAsPlane(ArTrackable *trackable)`	`ArPlane *` Downcasts to `ArPlane`.
`ArAsPoint(ArTrackable *trackable)`	`ArPoint *` Downcasts to `ArPoint`.
`ArAsStreetscapeGeometry(ArTrackable *trackable)`	`ArStreetscapeGeometry *` Downcasts to `ArStreetscapeGeometry`.
`ArAsTrackable(ArPlane *plane)`	`ArTrackable *` Upcasts to `ArTrackable`.
`ArAsTrackable(ArPoint *point)`	`ArTrackable *` Upcasts to `ArTrackable`.
`ArAsTrackable(ArAugmentedImage *augmented_image)`	`ArTrackable *` Upcasts to `ArTrackable`.
`ArAsTrackable(ArInstantPlacementPoint *instant_placement_point)`	`ArTrackable *` Upcasts to `ArTrackable`.
`ArAsTrackable(ArAugmentedFace *face)`	`ArTrackable *` Upcasts to `ArTrackable`.
`ArAsTrackable(ArStreetscapeGeometry *streetscape_geometry)`	`ArTrackable *` Upcasts to `ArTrackable`.

Functions

ArAsAugmentedImage

ArAugmentedImage * ArAsAugmentedImage(
  ArTrackable *trackable
)

Downcasts to ArAugmentedImage.

ArAsFace

ArAugmentedFace * ArAsFace(
  ArTrackable *trackable
)

Downcasts to ArAugmentedFace.

ArAsFuture

ArFuture * ArAsFuture(
  ArHostCloudAnchorFuture *future
)

Upcasts to ArFuture.

ArAsFuture

ArFuture * ArAsFuture(
  ArResolveCloudAnchorFuture *future
)

Upcasts to ArFuture.

ArAsFuture

ArFuture * ArAsFuture(
  ArResolveAnchorOnTerrainFuture *future
)

Upcasts to ArFuture.

ArAsFuture

ArFuture * ArAsFuture(
  ArResolveAnchorOnRooftopFuture *future
)

Upcasts to ArFuture.

ArAsFuture

ArFuture * ArAsFuture(
  ArVpsAvailabilityFuture *future
)

Upcasts to ArFuture.

ArAsInstantPlacementPoint

ArInstantPlacementPoint * ArAsInstantPlacementPoint(
  ArTrackable *trackable
)

Downcasts to ArInstantPlacementPoint.

ArAsPlane

ArPlane * ArAsPlane(
  ArTrackable *trackable
)

Downcasts to ArPlane.

ArAsPoint

ArPoint * ArAsPoint(
  ArTrackable *trackable
)

Downcasts to ArPoint.

ArAsStreetscapeGeometry

ArStreetscapeGeometry * ArAsStreetscapeGeometry(
  ArTrackable *trackable
)

Downcasts to ArStreetscapeGeometry.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArPlane *plane
)

Upcasts to ArTrackable.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArPoint *point
)

Upcasts to ArTrackable.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArAugmentedImage *augmented_image
)

Upcasts to ArTrackable.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArInstantPlacementPoint *instant_placement_point
)

Upcasts to ArTrackable.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArAugmentedFace *face
)

Upcasts to ArTrackable.

ArAsTrackable

ArTrackable * ArAsTrackable(
  ArStreetscapeGeometry *streetscape_geometry
)

Upcasts to ArTrackable.