From 2877c6032dfbcbd3b86ff9d6efccde72ce3a39e9 Mon Sep 17 00:00:00 2001
From: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
Date: Tue, 30 Dec 2025 06:30:35 -0300
Subject: [PATCH] Improve connect infill for multiline (#11765)

* Improve connect infill for multiline
* Simplify multiline infill connection logic
---
 src/libslic3r/Fill/FillBase.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libslic3r/Fill/FillBase.cpp b/src/libslic3r/Fill/FillBase.cpp
index c585329079..eff83efe3e 100644
--- a/src/libslic3r/Fill/FillBase.cpp
+++ b/src/libslic3r/Fill/FillBase.cpp
@@ -1707,6 +1707,12 @@ void Fill::connect_infill(Polylines &&infill_ordered, const std::vector<const Po
             size_t                    polyline_idx1  = get_and_update_merged_with(((cp1 - graph.map_infill_end_point_to_boundary.data()) / 2));
             size_t                    polyline_idx2  = get_and_update_merged_with(((cp2 - graph.map_infill_end_point_to_boundary.data()) / 2));
             const Points             &contour        = graph.boundary[cp1->contour_idx];
+
+            // Orca: If multiline infill is requested, skip connections that are too short.
+            if (params.multiline > 1 && arc.arc_length < scale_(spacing) * params.multiline) {
+                continue;
+            }
+
             const std::vector<double> &contour_params = graph.boundary_params[cp1->contour_idx];
             if (polyline_idx1 != polyline_idx2) {
                 Polyline &polyline1 = infill_ordered[polyline_idx1];