NX二次开发培训源码分享： 通过选择指定特征，修改特征...

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7 F' I) S8 H" N7 o0 x创建一个选择feature的功能，当用户选择的是sphere的时候，让用户选择更改球的直径！

Session *theSession = Session::GetSession();
8 b% }. C/ ^$ ~$ Q        UI         *theUI = UI        ::GetUI();
% _1 g5 W( [7 O        Part *workPart (theSession->Parts()->Work());
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        // initialize the select
% x/ Q7 S9 V6 D& p. ]2 g        std::vector <Selection::MaskTriple> masks(1);
        Selection::MaskTriple mask;
9 z& \9 U$ i. l" q! C, T6 E7 K$ D        mask.Type=UF_feature_type;
        mask.Subtype =0;
        mask.SolidBodySubtype=0;
        masks.push_back(mask);
        //masks[0] = {{UF_feature_type,0,0}};
        TaggedObject *object;
        std::stringstream ss;
$ O* e$ Z4 g, q( Q% `        Point3d cursor;
        Selection::SelectionScope scope =  Selection::SelectionScopeUseDefault;
* z" P! l/ J$ M! A, `- C  a        Selection::SelectionAction action = Selection::SelectionActionClearAndEnableSpecific;
        Selection::Response res;
7 J- K" x. Q6 M        Features::Feature * getFeature = NULL;
        res = theUI->SelectionManager()->SelectTaggedObject("select a feature:","feature select",scope,action,false,false,masks,&object,&cursor);
8 r: W# Z# V! C% N        if(res == Selection::ResponseObjectSelected || res == Selection::ResponseObjectSelectedByName)
                {
* y7 }, g+ L2 g6 n4 _: G) M' B                        // get the information
                         getFeature = dynamic_cast<Features::Feature *>(object);

0 b+ f/ p' H8 b* l, R5 H- B4 N. @          theSession->ListingWindow()->WriteLine("the select feature type is : " +getFeature->FeatureType() + "\n");

                 if (!strcmp(getFeature->FeatureType().GetUTF8Text(),"SPHERE"))
                 {
: r! ^' }0 `! Q                         Features::Sphere *getSphere = dynamic_cast<Features::Sphere *>(getFeature);
) K* n' w. Y& |( i, @+ D                         std::vector<Expression *> exp =  getSphere->GetExpressions();
                         ss << exp.size() <<endl;
                         theSession->ListingWindow()->WriteLine("the expression number is : "  + ss.str() );
( a/ @; s+ R) A$ a6 c                         for(unsigned int i =0 ; i< exp.size();i++)
8 o2 H, M: z% ~4 w# ~                         {   
                                  theSession->ListingWindow()->WriteLine("The expressions are : " + exp[i]->Equation()+"\n");
                         }
                         Session::UndoMarkId undomark = theSession->SetUndoMark(Session::MarkVisibilityVisible,"change the exp");
                         exp[0]->SetRightHandSide("400");
                         theSession->UpdateManager()->DoUpdate(undomark);
                         theSession->ListingWindow()->WriteLine("The expressions are : " + exp[0]->Equation()+"\n");
2 c/ _# O- T! I+ W                 }
          }

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