DOCS: DOCATT-8754: Updated TrackedDevice class documentation

[unitALG]

Description

Added documentation for the InputSystem.TrackedDevice class, particularly for the 4 properties. Several users had requested more information about these properties and their values, specifically the IntegerControl value in the trackingState property.

Testing status & QA

No code was altered; documentation changes only. However, I did run the formatting tool and regenerated the documentation locally to test it.

Overall Product Risks

Very low risk (documentation only).

Comments to reviewers

I've requested a technical review from Chris Massie, who kindly provided me with some background on this class.

Checklist

• Commit message for squash-merge is prefixed with DOCS: ___.

[u-pr]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪ The PR consists entirely of documentation updates within a single file, requiring only a check for clarity, accuracy, and formatting.

🏅 Score: 92 The documentation is detailed and provides helpful context, but there is a likely copy-paste error in the rotation property description and a potentially confusing technical explanation for the tracked status property.

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Copy-paste Error In the <summary> for the deviceRotation property, the text states: "this means the 'center' eye position." This appears to be copied from devicePosition and should likely refer to rotation or orientation instead of position. /// Represents the rotation portion of the input device's primary /// [pose](xref:input-system-tracked-input-devices#tracked-pose-driver). For an HMD /// device, this means the "center" eye position. For XR controllers, it means the "grip" pose. /// </summary> Documentation Accuracy The remarks for isTracked state that it "might contain a float that includes bits". Since isTracked is a ButtonControl (typically representing a normalized 0 or 1 value) and trackingState is the IntegerControl specifically designed for bitwise flags (as noted in lines 26-28), verify if this description correctly applies to isTracked or if it conflates the two properties. /// This property can contain a simple bit (1 or 0), but for some Open XR devices, this might /// contain a float that includes bits that can indicate whether the device's position is actual /// or inferred from its last-known [pose](xref:openxr-input#pose-data) (OpenXR Plugin package).

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[u-pr]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	Correct copy-paste error in documentation summary The summary for deviceRotation incorrectly refers to the HMD's primary pose as "center eye position", which likely resulted from a copy-paste error from devicePosition. It should refer to the "center eye pose" to accurately define the source of the rotation data. Packages/com.unity.inputsystem/InputSystem/Devices/TrackedDevice.cs [74-76] /// Represents the rotation portion of the input device's primary /// [pose](xref:input-system-tracked-input-devices#tracked-pose-driver). For an HMD -/// device, this means the "center" eye position. For XR controllers, it means the "grip" pose. +/// device, this means the "center" eye pose. For XR controllers, it means the "grip" pose. Suggestion importance[1-10]: 6 __ Why: The documentation for deviceRotation incorrectly refers to "center eye position" due to a likely copy-paste error from devicePosition. Changing it to "pose" accurately reflects that the rotation is derived from the tracked pose.	Low
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[codecov-fd.fxlcf.dpdns.org]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Files with missing lines	Coverage Δ
...y.inputsystem/InputSystem/Devices/TrackedDevice.cs	100.00% <ø> (ø)

... and 5 files with indirect coverage changes

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[chris-massie]

I gave a suggestion to replace a Pose link to go to https://docs.unity3d.com/Packages/com.unity.xr.openxr@1.16/manual/input.html#pose-data instead of the Tracked Pose Driver component documentation since it's more direct to what the pose data is.