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fix: smooth position interpolation for planes, boats, and satellites

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This commit is contained in:
anoracleofra-code
2026-03-08 22:32:43 -06:00
parent d8098c0414
commit 2a511c628d
1 changed files with 12 additions and 9 deletions
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frontend/src/components/MaplibreViewer.tsx
+12 -9
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@@ -112,10 +112,10 @@ function classifyAircraft(model: string, category?: string): 'heli' | 'turboprop
// --- Smooth position interpolation helpers ---
// Given heading (degrees) and speed (knots), compute new lat/lng after dt seconds
function interpolatePosition(lat: number, lng: number, headingDeg: number, speedKnots: number, dtSeconds: number, maxDist = 3704): [number, number] {
function interpolatePosition(lat: number, lng: number, headingDeg: number, speedKnots: number, dtSeconds: number, maxDist = 0, maxDt = 65): [number, number] {
if (!speedKnots || speedKnots <= 0 || dtSeconds <= 0) return [lat, lng];
// Cap interpolation to max 6 seconds to prevent runaway drift when data is stale
const clampedDt = Math.min(dtSeconds, 6);
// Cap interpolation time to prevent runaway drift when data is stale
const clampedDt = Math.min(dtSeconds, maxDt);
// 1 knot = 1 nautical mile/hour = 1852 m/h
const speedMps = speedKnots * 0.5144; // meters per second
const dist = maxDist > 0 ? Math.min(speedMps * clampedDt, maxDist) : speedMps * clampedDt;
@@ -232,14 +232,15 @@ const MaplibreViewer = ({ data, activeLayers, onEntityClick, flyToLocation, sele
const [interpTick, setInterpTick] = useState(0);
const dataTimestamp = useRef<number>(Date.now());
// Track when flight/ship data actually changes (new fetch arrived)
// Track when flight/ship/satellite data actually changes (new fetch arrived)
useEffect(() => {
dataTimestamp.current = Date.now();
}, [data?.commercial_flights, data?.ships]);
}, [data?.commercial_flights, data?.ships, data?.satellites]);
// Tick every 5s between data refreshes to animate flight positions
// Tick every 2s between data refreshes to animate positions
// Satellites move ~7km/s so need frequent updates for smooth motion
useEffect(() => {
const timer = setInterval(() => setInterpTick(t => t + 1), 10000);
const timer = setInterval(() => setInterpTick(t => t + 1), 2000);
return () => clearInterval(timer);
}, []);
@@ -499,10 +500,12 @@ const MaplibreViewer = ({ data, activeLayers, onEntityClick, flyToLocation, sele
return [newLng, newLat];
};
// Helper: interpolate a satellite's position — reuses interpolatePosition with no distance cap
// Helper: interpolate a satellite's position between API updates
// Satellites have deterministic orbits so linear interpolation over 60s is accurate
// maxDt=65 allows full interval coverage (60s update + 5s buffer)
const interpSat = (s: any): [number, number] => {
if (!s.speed_knots || s.speed_knots <= 0 || dtSeconds < 1) return [s.lng, s.lat];
const [newLat, newLng] = interpolatePosition(s.lat, s.lng, s.heading || 0, s.speed_knots, dtSeconds, 0);
const [newLat, newLng] = interpolatePosition(s.lat, s.lng, s.heading || 0, s.speed_knots, dtSeconds, 0, 65);
return [newLng, newLat];
};