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package ride
import "time"
const MovingTimeAlgorithmVersion = "v1"
// movingTimeMinSpeedMps is the minimum implied speed between two consecutive
// track points for the interval to count as moving (0.4 km/h).
const movingTimeMinSpeedMps = 0.4 / 3.6
// movingTimeMaxGap is the maximum time gap between consecutive track points
// that can count as moving. Longer gaps are pauses (stops, lost signal).
const movingTimeMaxGap = 120 * time.Second
// Bench (356 rides, `-backtest`):
// absMean 2.5%, bias -1.3, p50 0.8, p75 2.9, p90 6.0, p95 9.3, p99 26.2.
func MovingTime(r Ride) time.Duration {
return movingTime(r, movingTimeMinSpeedMps, movingTimeMaxGap)
}
func movingTime(r Ride, minSpeedMps float64, maxGap time.Duration) time.Duration {
var moving time.Duration
for i := 1; i < r.Len(); i++ {
dt := r.Timestamp(i).Sub(r.Timestamp(i - 1))
if dt <= 0 || dt > maxGap {
continue
}
dd := r.DistanceM(i) - r.DistanceM(i-1)
if dd/dt.Seconds() > minSpeedMps {
moving += dt
}
}
return moving
}
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