region select_overlapping miss properties

[T-bag-A]

I have some shapes with properties , with layout.begin_shapes to form a region A. then use select_overlapping with A and other region B, C=A.select_overlapping(B) I found the shapes in C missing the properties. expect result: the shapes in C keep the properties from A I try to find some clues, but does not know how to do.

OriginalLayerRegionIterator using shape.polygon to convert shape to polygon.

void set () { while (! m_rec_iter.at_end () && ! (m_rec_iter.shape ().is_polygon () || m_rec_iter.shape ().is_path () || m_rec_iter.shape ().is_box ())) { ++m_rec_iter; } if (! m_rec_iter.at_end ()) { m_rec_iter.shape().polygon (m_polygon); m_polygon.transform (m_iter_trans * m_rec_iter.trans (), false); } }

bool Shape::polygon (Shape::polygon_type &p) const { if (m_type == Polygon) { p = polygon (); return true; } else if (m_type == PolygonRef || m_type == PolygonPtrArrayMember) { polygon_ref ().instantiate (p); return true; } else if (m_type == SimplePolygon) { p.clear (); const simple_polygon_type &sp = simple_polygon (); p.assign_hull (sp.hull ()); return true; } else if (m_type == SimplePolygonRef || m_type == SimplePolygonPtrArrayMember) { p.clear (); const simple_polygon_ref_type &sp = simple_polygon_ref (); p.assign_hull (sp.obj ().begin_hull (), sp.obj ().end_hull (), sp.trans (), false /no additional compression/); return true; } else if (m_type == Path) { p = path ().polygon (); return true; } else if (m_type == PathRef || m_type == PathPtrArrayMember) { p = path_ref ().obj ().polygon (); p.transform (path_ref ().trans (), false /no additional compression/); return true; } else if (is_box ()) { p = Shape::polygon_type (box ()); return true; } else { return false; } }

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const polygon_type *basic_ptr (polygon_type::tag) const { tl_assert (m_type == Polygon); if (m_stable) { return m_with_props ? &(((ppolygon_iter_type *) m_generic.iter)) : &(((polygon_iter_type *) m_generic.iter)); } else { return m_with_props ? m_generic.ppolygon : m_generic.polygon; } }

[klayoutmatthias]

I'm sorry, but select_overlapping is a pure polygon (or rather: merged polygon) operation. No properties supported. This is the way, Region methods act. None of them preserves properties.

[T-bag-A]

Maybe I should tell the story firstly. I have lots of defect from KLA , then i convert each defect to a box then add some defect meta info (defect id) into box properties. then after selectoverlapping with specific layer (eg M1) , i can identify which defect is true defect and get the defect id from box properties. my soution I have changed the OriginalLayerRegionIterator to delivery the Polygon or PolygonWithProperies. and change AsIfFlatRegion::selected_interacting_generic by which polygon is not new generated, but selected by a index property_type from original input region: for (RegionIterator p (begin_merged ()); ! p.at_end (); ++p, ++n) { if ((selected.find (n) == selected.end ()) == inverse) { db::Polygon * p1= const_cast <db::Polygon *>(&*p); const db::PolygonWithProperties * pp= dynamic_cast< db::PolygonWithProperties *> (p1); if (pp) { output->raw_polygons ().insert (*pp); }else { output->raw_polygons ().insert (*p); } } } (current working，but should be review,may i issue a PR ?)