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include tolerance for displaying of path and zone

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some browsers (firefox and probably brave) intentionally reduce precision of seeking with currentTime for privacy reasons
This commit is contained in:
Josh Hawkins 2025-11-01 07:26:09 -05:00
parent af765af0d2
commit b9ca9e49dd
1 changed files with 31 additions and 22 deletions
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53
web/src/components/overlay/ObjectTrackOverlay.tsx
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@ -13,6 +13,9 @@ import { cn } from "@/lib/utils";
import { useTranslation } from "react-i18next";
import { Event } from "@/types/event";
// Use a small tolerance (10ms) for browsers with seek precision by-design issues
const TOLERANCE = 0.01;
type ObjectTrackOverlayProps = {
camera: string;
showBoundingBoxes?: boolean;
@ -166,41 +169,45 @@ export default function ObjectTrackOverlay({
}) || [];
// show full path once current time has reached the object's start time
const combinedPoints = [...savedPathPoints, ...eventSequencePoints]
.sort((a, b) => a.timestamp - b.timestamp)
.filter(
(point) =>
currentTime >= (eventData?.start_time ?? 0) &&
point.timestamp >= (eventData?.start_time ?? 0) &&
point.timestamp <= (eventData?.end_time ?? Infinity),
);
// event.start_time is in DETECT stream time, so convert it to record stream time for comparison
const eventStartTimeRecord =
(eventData?.start_time ?? 0) + annotationOffset / 1000;
const allPoints = [...savedPathPoints, ...eventSequencePoints].sort(
(a, b) => a.timestamp - b.timestamp,
);
const combinedPoints = allPoints.filter(
(point) =>
currentTime >= eventStartTimeRecord - TOLERANCE &&
point.timestamp <= effectiveCurrentTime + TOLERANCE,
);
// Get color for this object
const label = eventData?.label || "unknown";
const color = getObjectColor(label, objectId);
// Get current zones
// zones (with tolerance for browsers with seek precision by-design issues)
const currentZones =
timelineData
?.filter(
(event: TrackingDetailsSequence) =>
event.timestamp <= effectiveCurrentTime,
event.timestamp <= effectiveCurrentTime + TOLERANCE,
)
.sort(
(a: TrackingDetailsSequence, b: TrackingDetailsSequence) =>
b.timestamp - a.timestamp,
)[0]?.data?.zones || [];
// Get current bounding box
const currentBox = timelineData
?.filter(
(event: TrackingDetailsSequence) =>
event.timestamp <= effectiveCurrentTime && event.data.box,
)
.sort(
(a: TrackingDetailsSequence, b: TrackingDetailsSequence) =>
b.timestamp - a.timestamp,
)[0]?.data?.box;
// bounding box (with tolerance for browsers with seek precision by-design issues)
const boxCandidates = timelineData?.filter(
(event: TrackingDetailsSequence) =>
event.timestamp <= effectiveCurrentTime + TOLERANCE &&
event.data.box,
);
const currentBox = boxCandidates?.sort(
(a: TrackingDetailsSequence, b: TrackingDetailsSequence) =>
b.timestamp - a.timestamp,
)[0]?.data?.box;
return {
objectId,
@ -221,6 +228,7 @@ export default function ObjectTrackOverlay({
getObjectColor,
config,
camera,
annotationOffset,
]);
// Collect all zones across all objects
@ -274,9 +282,10 @@ export default function ObjectTrackOverlay({
const handlePointClick = useCallback(
(timestamp: number) => {
onSeekToTime?.(timestamp, false);
// Convert detect stream timestamp to record stream timestamp before seeking
onSeekToTime?.(timestamp + annotationOffset / 1000, false);
},
[onSeekToTime],
[onSeekToTime, annotationOffset],
);
const zonePolygons = useMemo(() => {