Add explicit minimum bed distance (10mm) for XL printers when arranging

src/libslic3r/Arrange.cpp

@@ -687,7 +687,9 @@ void arrange(ArrangePolygons &items,
              const SegmentedRectangleBed &bed,
              const ArrangeParams &params)
 {
-    arrange(items, excludes, bed.bb, params);
+    auto arrbed = bed.bb;
+    arrbed.offset(-bed.inset);
+    arrange(items, excludes, arrbed, params);
 
     if (! excludes.empty())
         return;
@@ -744,6 +746,19 @@ void arrange(ArrangePolygons &items,
 
         Vec2crd d = bb.center() - pilebb[bedidx].center();
 
+        auto bedbb = bed.bb;
+        bedbb.offset(-bed.inset);
+        auto pilebbx = pilebb[bedidx];
+        pilebbx.translate(d);
+
+        Point corr{0, 0};
+        corr.x() = -std::min(0, pilebbx.min.x() - bedbb.min.x())
+                   -std::max(0, pilebbx.max.x() - bedbb.max.x());
+        corr.y() = -std::min(0, pilebbx.min.y() - bedbb.min.y())
+                   -std::max(0, pilebbx.max.y() - bedbb.max.y());
+
+        d += corr;
+
         for (auto &itm : items)
             if (itm.bed_idx == bedidx)
                 itm.translation += d;

src/libslic3r/Arrange.hpp

@@ -38,6 +38,7 @@ public:
 struct SegmentedRectangleBed {
     Vec<2, size_t> segments;
     BoundingBox bb;
+    coord_t inset = 0;
 
     SegmentedRectangleBed (const BoundingBox &bb,
                            size_t segments_x,

src/libslic3r/PrintConfig.cpp

@@ -4663,7 +4663,9 @@ Points get_bed_shape(const DynamicPrintConfig &config)
 void get_bed_shape(const DynamicPrintConfig &cfg, arrangement::ArrangeBed &out)
 {
     if (is_XL_printer(cfg)) {
-        out = arrangement::SegmentedRectangleBed{get_extents(get_bed_shape(cfg)), 4, 4};
+        arrangement::SegmentedRectangleBed bed{get_extents(get_bed_shape(cfg)), 4, 4};
+        bed.inset = scaled(10.);
+        out = bed;
     } else {
         out = arrangement::to_arrange_bed(get_bed_shape(cfg));
     }