Best Practices for AR Session in Mega

This article introduces how to create and configure an AR session in Mega for optimal performance on different types of devices.

Before You Start

• Understand the basic concepts, components, and workflow of an AR Session
• Understand how to create a session

Sessions with Default Configuration

For most applications, it is recommended to use the default Mega session configuration, which has been optimized for most common use cases.

The default session supports the following types of devices:

• Devices that support 6DoF motion tracking (some modern phones and headsets)
• Devices that support 5DoF inertial navigation (most Android phones with gyroscopes and accelerometers)

• Mega Block
• Mega Landmark

Right-click on the blank area in the Hierarchy view, and you can create a default Mega session through the menu EasyAR Sense > Mega > AR Session (Mega Block Default Preset).

The corresponding script code is as follows:

ARSessionFactory.CreateSession(ARSessionFactory.ARSessionPreset.MegaBlock_MotionTracking_Inertial)

This session uses the MegaBlock_MotionTracking_Inertial preset:

• For the frame source components and their sorting, you can refer to the frame source group corresponding to the MegaBlock_MotionTracking_Inertial preset in Frame Source Group of Preset AR Sessions.
• MegaTrackerFrameFilter.MinInputFrameLevel is FiveDof.
• MegaTrackerFrameFilter.ServiceType is Block.

Selecting Different Presets

In addition to the default-configured Mega session, you can also select different presets to create a session according to specific requirements. The main difference between them lies in the supported device types.

• Mega Block
• Mega Landmark

The optional presets when creating a session using the menu and ARSessionFactory.CreateSession(ARSessionFactory.ARSessionPreset, ARSessionFactory.Resources) include:

• MegaBlock_MotionTracking
  • Frame source components and ordering can refer to the frame source group corresponding to the MegaBlock_MotionTracking preset in Preset AR session frame source groups
  • MegaTrackerFrameFilter.MinInputFrameLevel is SixDof
  • MegaTrackerFrameFilter.ServiceType is Block
• MegaBlock_MotionTracking_Inertial (default)
  • Frame source components and ordering can refer to the frame source group corresponding to the MegaBlock_MotionTracking_Inertial preset in Preset AR session frame source groups
  • MegaTrackerFrameFilter.MinInputFrameLevel is FiveDof
  • MegaTrackerFrameFilter.ServiceType is Block
• MegaBlock_MotionTracking_Inertial_3DOF
  • Frame source components and ordering can refer to the frame source group corresponding to the MegaBlock_MotionTracking_Inertial_3DOF preset in Preset AR session frame source groups
  • MegaTrackerFrameFilter.MinInputFrameLevel is ThreeDof
  • MegaTrackerFrameFilter.ServiceType is Block
• MegaBlock_MotionTracking_Inertial_3DOF_0DOF
  • Frame source components and ordering can refer to the frame source group corresponding to the MegaBlock_MotionTracking_Inertial_3DOF_0DOF preset in Preset AR session frame source groups
  • MegaTrackerFrameFilter.MinInputFrameLevel is ZeroDof
  • MegaTrackerFrameFilter.ServiceType is Block

Note

The performance of Mega varies on different types of devices. For details, refer to Devices and Platform Applications Supported by Mega.

Next Steps

• Add a tracking target
• Add 3D content aligned with the real world
• Control the tracking process

Related Topics

• Read Frame Data Sources to understand the basic concepts of frame data sources and the process of selecting frame data sources at runtime
• Read Add a Group of Frame Data Sources to understand the configuration and usage of data source groups
• Read Devices and Platform Applications Supported by Mega to understand the devices supported by Mega and the performance on different devices