+//================================================================================
+/*!
+ * \brief Make an offset mesh from a source 2D mesh
+ * \param [inout] theObject - source mesh. New elements are added to this mesh
+ * if \a theMeshName is empty.
+ * \param [in] theValue - offset value
+ * \param [in] theCopyGroups - to generate groups
+ * \param [in] theMeshName - optional name of a new mesh
+ * \param [out] theGroups - new groups
+ * \return SMESH::SMESH_Mesh_ptr - the modified mesh
+ */
+//================================================================================
+
+SMESH::SMESH_Mesh_ptr SMESH_MeshEditor_i::Offset( SMESH::SMESH_IDSource_ptr theObject,
+ CORBA::Double theValue,
+ CORBA::Boolean theCopyGroups,
+ CORBA::Boolean theCopyElements,
+ const char* theMeshName,
+ SMESH::ListOfGroups_out theGroups)
+ throw (SALOME::SALOME_Exception)
+{
+ SMESH_TRY;
+ initData();
+
+ SMESHDS_Mesh* aMeshDS = getMeshDS();
+
+ SMESH::SMESH_Mesh_var mesh_var;
+ ::SMESH_MeshEditor::PGroupIDs groupIds;
+
+ TPythonDump pyDump;
+
+ TIDSortedElemSet elements, copyElements;
+ if ( idSourceToSet( theObject, aMeshDS, elements, SMDSAbs_Face,
+ /*emptyIfIsMesh=*/ !myIsPreviewMode ))
+ {
+ // mesh to modify
+ SMESH_Mesh* tgtMesh = 0;
+ if ( myIsPreviewMode )
+ {
+ TPreviewMesh * tmpMesh = getPreviewMesh();
+ tgtMesh = tmpMesh;
+ tmpMesh->Copy( elements, copyElements );
+ elements.swap( copyElements );
+ theCopyGroups = false;
+ theCopyElements = false;
+ }
+ else
+ {
+ mesh_var =
+ *theMeshName ? makeMesh( theMeshName ) : SMESH::SMESH_Mesh::_duplicate( myMesh_i->_this() );
+ SMESH_Mesh_i* mesh_i = SMESH::DownCast<SMESH_Mesh_i*>( mesh_var );
+ tgtMesh = & mesh_i->GetImpl();
+ }
+ groupIds = getEditor().Offset( elements, theValue, tgtMesh,
+ theCopyGroups, theCopyElements, !myIsPreviewMode );
+
+ tgtMesh->GetMeshDS()->Modified();
+ }
+
+ if ( myIsPreviewMode )
+ {
+ //getPreviewMesh()->Remove( SMESHUtils::elemSetIterator( copyElements ));
+ }
+ else
+ {
+ theGroups = theCopyGroups ? getGroups( groupIds.get() ) : new SMESH::ListOfGroups;
+
+ if ( *theMeshName && mesh_var->NbFaces() == 0 )
+ {
+ // new mesh empty, remove it
+ SALOMEDS::Study_var study = SMESH_Gen_i::getStudyServant();
+ SALOMEDS::StudyBuilder_var builder = study->NewBuilder();
+ SALOMEDS::SObject_wrap meshSO = SMESH_Gen_i::ObjectToSObject( mesh_var );
+ builder->RemoveObjectWithChildren( meshSO );
+ THROW_SALOME_CORBA_EXCEPTION("Offset failed", SALOME::INTERNAL_ERROR);
+ }
+
+ // result of Offset() is a tuple (mesh, groups)
+ if ( mesh_var->_is_nil() ) pyDump << myMesh_i->_this() << ", ";
+ else pyDump << mesh_var << ", ";
+ pyDump << theGroups << " = " << this << ".Offset( "
+ << theObject << ", "
+ << theValue << ", "
+ << theCopyGroups << ", "
+ << theCopyElements << ", "
+ << "'" << theMeshName<< "')";
+ }
+
+ return mesh_var._retn();
+
+ SMESH_CATCH( SMESH::throwCorbaException );
+ return SMESH::SMESH_Mesh::_nil();
+}