1 files changed, 10 insertions, 0 deletions
diff --git a/climb/route.go b/climb/route.go
index 4ef3465..e341bea 100644
--- a/climb/route.go
+++ b/climb/route.go
@@ -14,6 +14,16 @@ type SegmentSample struct {
 	ElevationGainM float64
 }
 
+// Slice returns the sub-route covering the given point indices (inclusive). A route without coords
+// (a resampled profile) keeps them empty.
+func (route Route) Slice(start, end int) Route {
+	sliced := Route{Distances: route.Distances[start : end+1], Elevations: route.Elevations[start : end+1]}
+	if len(route.Coords) == len(route.Distances) {
+		sliced.Coords = route.Coords[start : end+1]
+	}
+	return sliced
+}
+
 // Sample returns the recorded length and elevation gain of the route slice between start and end (inclusive), counting only upward steps in the gain.
 func (route Route) Sample(start, end int) SegmentSample {
 	sample := SegmentSample{DistanceM: route.Distances[end] - route.Distances[start]}