From 6536e18423376ffd72818899d64f8280e68777d1 Mon Sep 17 00:00:00 2001
From: thysson2701 <thysson2701@gmail.com>
Date: Tue, 21 Jul 2026 21:38:55 +0200
Subject: [PATCH] fix(build): Polyline3/Line3 conversions in GCode.cpp
 wipe+gradient, add sparse_infill_filament config

---
 src/libslic3r/GCode.cpp       | 28 ++++++++++++++++------------
 src/libslic3r/PrintConfig.hpp |  1 +
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 7b65767db78..ce2006e5b2b 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -10446,7 +10446,7 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
         // inside the model
         if(discoveredTouchingLines > 1){
             // use extrude instead of travel_to_xy to trigger the unretract
-            ExtrusionPath fake_path_wipe(Polyline{pt, current_point}, paths.front());
+            ExtrusionPath fake_path_wipe(Polyline3(Polyline{pt, current_point}), paths.front());
             fake_path_wipe.set_force_no_extrusion(true);
             fake_path_wipe.mm3_per_mm = 0;
             //fake_path_wipe.set_extrusion_role(erExternalPerimeter);
@@ -10540,10 +10540,11 @@ std::string GCode::extrude_loop(ExtrusionLoop loop, std::string description, dou
         for (ExtrusionPath &path : paths) {
             //BBS: Don't need to save duplicated point into wipe path
             if (!m_wipe.path.empty() && !path.empty() &&
-                m_wipe.path.last_point() == path.first_point())
-                m_wipe.path.append(path.polyline.points.begin() + 1, path.polyline.points.end());
-            else
-                m_wipe.path.append(path.polyline);  // TODO: don't limit wipe to last path
+                m_wipe.path.last_point() == path.first_point()) {
+                Polyline pl2d = path.polyline.to_polyline();
+                m_wipe.path.append(pl2d.points.begin() + 1, pl2d.points.end());
+            } else
+                m_wipe.path.append(path.polyline.to_polyline());  // TODO: don't limit wipe to last path
         }
     }
 
@@ -10625,10 +10626,11 @@ std::string GCode::extrude_multi_path(ExtrusionMultiPath multipath, std::string
         for (ExtrusionPath &path : multipath.paths) {
             //BBS: Don't need to save duplicated point into wipe path
             if (!m_wipe.path.empty() && !path.empty() &&
-                m_wipe.path.last_point() == path.first_point())
-                m_wipe.path.append(path.polyline.points.begin() + 1, path.polyline.points.end());
-            else
-                m_wipe.path.append(path.polyline); // TODO: don't limit wipe to last path
+                m_wipe.path.last_point() == path.first_point()) {
+                Polyline pl2d = path.polyline.to_polyline();
+                m_wipe.path.append(pl2d.points.begin() + 1, pl2d.points.end());
+            } else
+                m_wipe.path.append(path.polyline.to_polyline()); // TODO: don't limit wipe to last path
         }
         m_wipe.path.reverse();
     }
@@ -10657,7 +10659,7 @@ std::string GCode::extrude_path(ExtrusionPath path, std::string description, dou
     //    description += ExtrusionEntity::role_to_string(path.role());
     std::string gcode = this->_extrude(path, description, speed);
     if (m_wipe.enable && FILAMENT_CONFIG(wipe)) {
-        m_wipe.path = path.polyline;
+        m_wipe.path = path.polyline.to_polyline();
         if (is_tree(this->config().support_type) && (path.role() == erSupportMaterial || path.role() == erSupportMaterialInterface || path.role() == erSupportTransition)) {
             if ((m_wipe.path.first_point() - m_wipe.path.last_point()).cast<double>().norm() > scale_(0.2)) {
                 double min_dist = scale_(0.2);
@@ -12591,7 +12593,8 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
             (outer_wall_gradient_dynamic_ctx.object_center_mode ||
              outer_wall_gradient_dynamic_ctx.vertex_color_match_mode);
         size_t line_idx = 0;
-        for (const Line3 &line : path.polyline.lines()) {
+        for (const Line3 &line3 : path.polyline.lines()) {
+            const Line line(line3.a.to_point(), line3.b.to_point());
             const size_t segment_idx = line_idx++;
             const double line_length = line.length() * SCALING_FACTOR;
             if (!std::isfinite(line_length) || line_length < EPSILON)
@@ -13392,7 +13395,8 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
                     }
                 } else {
                 size_t line_idx = 0;
-                for (const Line& line : path.polyline.lines()) {
+                for (const Line3& line3 : path.polyline.lines()) {
+                    const Line line(line3.a.to_point(), line3.b.to_point());
                     const size_t segment_idx = line_idx++;
                     std::string tempDescription = description;
                     const double line_length = line.length() * SCALING_FACTOR;
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 9859e8f3b41..96114557020 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -1125,6 +1125,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     ((ConfigOptionInt,                  fuzzy_skin_layers_between_ripple_offset))
     ((ConfigOptionFloat,                gap_infill_speed))
     ((ConfigOptionInt,                  sparse_infill_filament_id))
+    ((ConfigOptionInt,                  sparse_infill_filament))
     ((ConfigOptionFloatOrPercent,       sparse_infill_line_width))
     ((ConfigOptionPercent,              infill_wall_overlap))
     ((ConfigOptionPercent,              top_bottom_infill_wall_overlap))