Use smarter object function in partial arrangement with empty bed.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp b/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
index 35e7e160d..83f7bd246 100644
--- a/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
+++ b/src/libnest2d/include/libnest2d/placers/nfpplacer.hpp
@@ -167,6 +167,8 @@ struct NfpPConfig {
                        const ItemGroup&              // remaining items
                        )> before_packing;
 
+    std::function<void(const ItemGroup &, NfpPConfig &config)> on_preload;
+
     NfpPConfig(): rotations({0.0, Pi/2.0, Pi, 3*Pi/2}),
         alignment(Alignment::CENTER), starting_point(Alignment::CENTER) {}
 };
@@ -577,6 +579,12 @@ public:
         Base::clearItems();
     }
 
+    void preload(const ItemGroup& packeditems) {
+        Base::preload(packeditems);
+        if (config_.on_preload)
+            config_.on_preload(packeditems, config_);
+    }
+
 private:
 
     using Shapes = TMultiShape<RawShape>;