Merge branch 'master' of https://github.com/Prusa3d/PrusaSlicer

src/libnest2d/include/libnest2d/geometry_traits_nfp.hpp

@@ -220,7 +220,9 @@ inline NfpResult<RawShape> nfpConvexOnly(const RawShape& sh,
         auto next = std::next(first);
 
         while(next != sl::cend(sh)) {
+            if (pl::magnsq(*next - *first) > 0)
                 edgelist.emplace_back(*(first), *(next));
+
             ++first; ++next;
         }
     }
@@ -230,7 +232,9 @@ inline NfpResult<RawShape> nfpConvexOnly(const RawShape& sh,
         auto next = std::next(first);
 
         while(next != sl::cend(other)) {
+            if (pl::magnsq(*next - *first) > 0)
                 edgelist.emplace_back(*(next), *(first));
+
             ++first; ++next;
         }
     }

src/libslic3r/Technologies.hpp

@@ -57,6 +57,8 @@
 #define ENABLE_GCODE_WINDOW (1 && ENABLE_2_4_0_ALPHA0)
 // Enable exporting lines M73 for remaining time to next printer stop to gcode
 #define ENABLE_EXTENDED_M73_LINES (1 && ENABLE_VALIDATE_CUSTOM_GCODE)
+// Enable a modified version of automatic downscale on load of objects too big
+#define ENABLE_MODIFIED_DOWNSCALE_ON_LOAD_OBJECTS_TOO_BIG (1 && ENABLE_2_4_0_ALPHA0)
 
 
 #endif // _prusaslicer_technologies_h_

src/slic3r/GUI/Plater.cpp

@@ -2407,6 +2407,29 @@ std::vector<size_t> Plater::priv::load_model_objects(const ModelObjectPtrs &mode
 #endif /* AUTOPLACEMENT_ON_LOAD */
         }
 
+#if ENABLE_MODIFIED_DOWNSCALE_ON_LOAD_OBJECTS_TOO_BIG
+        for (size_t i = 0; i < object->instances.size(); ++i) {
+            ModelInstance* instance = object->instances[i];
+            const Vec3d size = object->instance_bounding_box(i).size();
+            const Vec3d ratio = size.cwiseQuotient(bed_size);
+            const double max_ratio = std::max(ratio(0), ratio(1));
+            if (max_ratio > 10000) {
+                // the size of the object is too big -> this could lead to overflow when moving to clipper coordinates,
+                // so scale down the mesh
+                double inv = 1. / max_ratio;
+                object->scale_mesh_after_creation(inv * Vec3d::Ones());
+                object->origin_translation = Vec3d::Zero();
+                object->center_around_origin();
+                scaled_down = true;
+                break;
+            }
+            else if (max_ratio > 5) {
+                const Vec3d inverse = 1.0 / max_ratio * Vec3d::Ones();
+                instance->set_scaling_factor(inverse.cwiseProduct(instance->get_scaling_factor()));
+                scaled_down = true;
+            }
+        }
+#else
         const Vec3d size = object->bounding_box().size();
         const Vec3d ratio = size.cwiseQuotient(bed_size);
         const double max_ratio = std::max(ratio(0), ratio(1));
@@ -2425,6 +2448,7 @@ std::vector<size_t> Plater::priv::load_model_objects(const ModelObjectPtrs &mode
             }
             scaled_down = true;
         }
+#endif // ENABLE_MODIFIED_DOWNSCALE_ON_LOAD_OBJECTS_TOO_BIG
 
         object->ensure_on_bed();
     }