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fix(elksharp): preserve source/target endpoints in corridor reroute clearance push

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When the corridor reroute pushes a horizontal segment away from a
blocking node, preserve the first point (source connection) and
insert a vertical step to reconnect the last point (target connection)
at the original Y. Previously, pushing all points uniformly would
disconnect the edge from its target node when the push Y exceeded
the target node's boundary.

Fixes edge/9 (Retry Decision → Set batchGenerateFailed) which was
pushed to Y=653 but the target node bottom is at Y=614 — the endpoint
now steps back up to Y=592 to reconnect.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
master
2026-04-03 07:47:07 +03:00
parent 6771d7fae8
commit a86ef6afb8
1 changed files with 19 additions and 1 deletions
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20
src/__Libraries/StellaOps.ElkSharp/ElkEdgeRouterIterative.BoundaryFirst.CorridorReroute.cs
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@@ -209,12 +209,30 @@ internal static partial class ElkEdgeRouterIterative
&& bestPushY < graphMaxY + 56d
&& Math.Abs(bestPushY - laneY) > 2d)
{
var newPath = new List<ElkPoint>(path.Count);
var newPath = new List<ElkPoint>(path.Count + 2);
for (var i = 0; i < path.Count; i++)
{
if (i >= bestSegStart && i <= bestSegStart + 1
&& Math.Abs(path[i].Y - laneY) <= 2d)
{
// Preserve source connection (first point).
if (i == 0)
{
newPath.Add(path[i]);
continue;
}
// Preserve target connection (last point) —
// insert a vertical step to reconnect.
if (i == path.Count - 1)
{
var stepX = path[i].X + (path[i - 1].X > path[i].X ? 24d : -24d);
newPath.Add(new ElkPoint { X = stepX, Y = bestPushY });
newPath.Add(new ElkPoint { X = stepX, Y = path[i].Y });
newPath.Add(path[i]);
continue;
}
newPath.Add(new ElkPoint { X = path[i].X, Y = bestPushY });
}
else