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API > API/Runtime > API/Runtime/HeadMountedDisplay > API/Runtime/HeadMountedDisplay/IXRTrackingSystem
References
| Module | HeadMountedDisplay |
| Header | /Engine/Source/Runtime/HeadMountedDisplay/Public/IXRTrackingSystem.h |
| Include | #include "IXRTrackingSystem.h" |
Syntax
static HMDDeviceId = 0;
Remarks
Device id 0 is reserved for an HMD. This should represent the HMD or the first HMD in case multiple HMDs are supported. Other devices can have arbitrary ids defined by each system. If a tracking system does not support tracking HMDs, device ID zero should be treated as invalid.