fix: harden local G2 candidate splicing

2026-07-30 17:37:45 +08:00
parent 1c433458bc
commit 1662b68062
3 changed files with 107 additions and 2 deletions
@@ -40,7 +40,12 @@ internal sealed class LocalG2PathSplicer
            SmoothingPoint2D point = source.Points[index];
            if (point.ArcLength < candidate.StartArcLengthMeters) AddWithoutNonGearDuplicates(combined, point);
        }
-        for (int index = 0; index < candidate.RegionPoints.Count; index++) AddWithoutNonGearDuplicates(combined, candidate.RegionPoints[index]);
+        // Candidate endpoints are only validated within a numerical tolerance.  The replacement
+        // itself must use the exact source-window endpoints, including a possible gear marker.
+        AddWithoutNonGearDuplicates(combined, start);
+        for (int index = 1; index < candidate.RegionPoints.Count - 1; index++)
+            AddWithoutNonGearDuplicates(combined, candidate.RegionPoints[index]);
+        AddWithoutNonGearDuplicates(combined, end);
        for (int index = 0; index < source.Points.Count; index++)
        {
            SmoothingPoint2D point = source.Points[index];