ARCore SDK for Unreal v1.4.0

ARCore SDK for Unreal v1.4.0 (2018-08-02)

Engine and plugin changes

ARCore Unreal SDK v1.4.0 is based on Unreal 4.20.0 release. The Unreal Engine branch with the 1.4.0 version of GoogleARCore plugin is located here:
https://github.com/google-ar-unreal/UnrealEngine/tree/4.20-arcore

New APIs

• ARCore Camera Configuration: All supported ARCore camera configurations can now be queried and set through the OnConfigCamera callback in ARCoreEventManager. The callback will be called when ARCore session is about to start.
• ARCore camera now support auto focus. You can enabled it in your ARSessionConfig.
• New BP/C++ method ARCoreLineTraceRay that performs a line trace with an arbitrary ray constructed from the given start and end point.

Behavioral changes

• The AugmentedImageDatabase cooking process now print more information to the Unreal Editor log.

Bug fixes

• Fixed the crash in UGoogleARCoreServicesFunctionLibrary::RemoveCloudARPin when the passed in UCloudARPin was already removed.
• AugmentedImageDatabase cooking process correctly handles engine and project paths that contain spaces
• Fixed crash when starting ARCore session if AugmentedImageDatabase failed to cook correctly.

GoogleARCore sample changes

• ARCore "ComputerVision" sample now supports options to configure the CPU image resolution.