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WalkthroughThe pull request introduces improvements to the pointer lock movement functionality by adding statistical validation for movement data. The changes include defining constants for history length and confidence threshold, updating the Changes
Sequence DiagramsequenceDiagram
participant User
participant PointerLock
participant MovementValidator
User->>PointerLock: Activate Pointer Lock
PointerLock->>MovementValidator: Initialize History Arrays
User->>PointerLock: Move Pointer
PointerLock->>MovementValidator: Capture Movement Data
MovementValidator->>MovementValidator: Calculate Z-Scores
alt Movement Exceeds Threshold
MovementValidator->>PointerLock: Adjust Movement
else Movement Within Threshold
MovementValidator->>PointerLock: Pass Original Movement
end
Poem
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Actionable comments posted: 1
🧹 Nitpick comments (4)
packages/pointer-lock-movement/src/pointer-lock-movement.ts (4)
7-8: Consider making these constants configurable.By hardcoding
HISTORY_LENGTHandCONFIDENCE_THRESHOLD, you limit runtime flexibility. If different environments or specific user requirements call for varying thresholds, consider exposing these constants as configuration parameters.
90-94: Possible performance concern with slicing arrays repeatedly.Slicing and spreading arrays (
[...context.historyX, movementX].slice(-HISTORY_LENGTH)) is not necessarily a big overhead at your current scale, but under high-frequency pointer events, a more efficient data structure (e.g., a fixed-size ring buffer) might be beneficial.
95-117: Z-score approach is straightforward, but consider alternative smoothing.Clamping the movement to the average upon crossing
CONFIDENCE_THRESHOLDcan effectively reduce noise, yet it might feel jarring if the pointer “snaps” to the average. Consider applying a softer correction, like exponential smoothing, to gradually converge unusual spikes toward a target value instead of abruptly forcing them all the way to the average.
230-231: Initialization of history arrays is correct, but verify usage upon re-locking.Clearing the movement history on each new lock is sensible for a fresh start. If the application requires persistent smoothing across multiple lock sessions, consider preserving or merging the prior history.
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📒 Files selected for processing (2)
packages/pointer-lock-movement/package.json(1 hunks)packages/pointer-lock-movement/src/pointer-lock-movement.ts(3 hunks)
✅ Files skipped from review due to trivial changes (1)
- packages/pointer-lock-movement/package.json
🔇 Additional comments (1)
packages/pointer-lock-movement/src/pointer-lock-movement.ts (1)
81-82: Context extension looks good.
Adding historyX and historyY to persist the movement history is a straightforward way to track outliers. This extension of the context seems coherent with the new smoothing logic.
| const contextPatch: Pick<MoveContext, 'event' | 'movementX' | 'movementY' | 'x' | 'y' | 'status' | 'historyX' | 'historyY'> = { | ||
| event: payload, | ||
| movementX: payload.movementX, | ||
| movementY: payload.movementY, | ||
| movementX, | ||
| movementY, | ||
| x: context.x + context.movementX, | ||
| y: context.y + context.movementY, | ||
| historyX, | ||
| historyY, |
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Likely logic bug when computing the new position.
You use context.x + context.movementX and context.y + context.movementY instead of the newly computed (possibly clamped) movementX and movementY. This discrepancy may ignore the corrected values meant to smooth out erratic spikes. To fix, reference the updated local variables in the position calculation:
- x: context.x + context.movementX,
- y: context.y + context.movementY,
+ x: context.x + movementX,
+ y: context.y + movementY,📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| const contextPatch: Pick<MoveContext, 'event' | 'movementX' | 'movementY' | 'x' | 'y' | 'status' | 'historyX' | 'historyY'> = { | |
| event: payload, | |
| movementX: payload.movementX, | |
| movementY: payload.movementY, | |
| movementX, | |
| movementY, | |
| x: context.x + context.movementX, | |
| y: context.y + context.movementY, | |
| historyX, | |
| historyY, | |
| const contextPatch: Pick<MoveContext, 'event' | 'movementX' | 'movementY' | 'x' | 'y' | 'status' | 'historyX' | 'historyY'> = { | |
| event: payload, | |
| movementX, | |
| movementY, | |
| x: context.x + movementX, | |
| y: context.y + movementY, | |
| historyX, | |
| historyY, |
1 participant
Summary by CodeRabbit
New Features
Version Updates
pointer-lock-movementpackage from0.1.9to0.2.0.