Fix bed filling with more existing instances than needed

src/libnest2d/include/libnest2d/nester.hpp

@@ -741,6 +741,10 @@ public:
         return impl_.getResult();
     }
 
+    inline int lastPackedBinId() const {
+        return impl_.lastPackedBinId();
+    }
+
     void clear() { impl_.clear(); }
 };
 
@@ -862,6 +866,10 @@ public:
     {
         return selector_.getResult();
     }
+
+    inline int lastPackedBinId() const {
+        return selector_.lastPackedBinId();
+    }
 };
 
 }

src/libnest2d/include/libnest2d/selections/firstfit.hpp

@@ -71,8 +71,9 @@ public:
         std::sort(store_.begin(), store_.end(), sortfunc);
 
         auto total = last-first;
-        auto makeProgress = [this, &total](Placer& placer, size_t idx) {
-            packed_bins_[idx] = placer.getItems();
+        auto makeProgress = [this, &total](Placer& placer, size_t bin_idx) {
+            packed_bins_[bin_idx] = placer.getItems();
+            this->last_packed_bin_id_ = int(bin_idx);
             this->progress_(static_cast<unsigned>(--total));
         };
 

src/libnest2d/include/libnest2d/selections/selection_boilerplate.hpp

@@ -18,6 +18,8 @@ public:
         return packed_bins_;
     }
 
+    inline int lastPackedBinId() const { return last_packed_bin_id_; }
+
     inline void progressIndicator(ProgressFunction fn) { progress_ = fn; }
 
     inline void stopCondition(StopCondition cond) { stopcond_ = cond; }
@@ -54,6 +56,7 @@ protected:
     PackGroup packed_bins_;
     ProgressFunction progress_ = [](unsigned){};
     StopCondition stopcond_ = [](){ return false; };
+    int last_packed_bin_id_ = -1;
 };
 
 }