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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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！

# f" Q' p7 W2 i8 USession *theSession = Session::GetSession();
        UI         *theUI = UI        ::GetUI();
% F8 q+ Z1 E+ x& L        Part *workPart (theSession->Parts()->Work());
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$ ^* t; _9 q* E8 P        // initialize the select
" t8 L- s$ o- U8 Q- m3 q        std::vector <Selection::MaskTriple> masks(1);
" f* L+ F* V/ B# h1 n        Selection::MaskTriple mask;
$ N' n8 ~4 z% w" H9 f& G0 K. s        mask.Type=UF_feature_type;
        mask.Subtype =0;
        mask.SolidBodySubtype=0;
        masks.push_back(mask);
5 s0 u6 I8 S+ J) J5 z) j        //masks[0] = {{UF_feature_type,0,0}};
, C  W2 w3 q: x$ k        TaggedObject *object;
8 o' I, ?9 y. x        std::stringstream ss;
        Point3d cursor;
0 }  l9 u( H* i5 L7 G6 C3 ^5 Q1 }        Selection::SelectionScope scope =  Selection::SelectionScopeUseDefault;
        Selection::SelectionAction action = Selection::SelectionActionClearAndEnableSpecific;
        Selection::Response res;
        Features::Feature * getFeature = NULL;
        res = theUI->SelectionManager()->SelectTaggedObject("select a feature:","feature select",scope,action,false,false,masks,&object,&cursor);
        if(res == Selection::ResponseObjectSelected || res == Selection::ResponseObjectSelectedByName)
                {
2 F* L3 r/ M% R- g% i1 q; X                        // get the information
2 y4 M# h* d, s% S. N                         getFeature = dynamic_cast<Features::Feature *>(object);
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% p  P' a6 v: S# }7 X: I          theSession->ListingWindow()->WriteLine("the select feature type is : " +getFeature->FeatureType() + "\n");

5 r4 D/ B7 _5 A, {* `  i                 if (!strcmp(getFeature->FeatureType().GetUTF8Text(),"SPHERE"))
' l* r8 p6 b0 @* v  `                 {
                         Features::Sphere *getSphere = dynamic_cast<Features::Sphere *>(getFeature);
' i$ A% N. }2 G0 T3 A5 }3 v1 ]+ `                         std::vector<Expression *> exp =  getSphere->GetExpressions();
                         ss << exp.size() <<endl;
* n( T% ?+ l! \/ t- K) I! o; K                         theSession->ListingWindow()->WriteLine("the expression number is : "  + ss.str() );
$ Z7 d; \: A  l                         for(unsigned int i =0 ; i< exp.size();i++)
, C% `3 J0 [0 x! |- w8 L                         {   
                                  theSession->ListingWindow()->WriteLine("The expressions are : " + exp[i]->Equation()+"\n");
                         }
                         Session::UndoMarkId undomark = theSession->SetUndoMark(Session::MarkVisibilityVisible,"change the exp");
1 Q" k* L# ]& c7 x. y7 e                         exp[0]->SetRightHandSide("400");
  ?" ]- Y2 v$ ]: I' u% ?                         theSession->UpdateManager()->DoUpdate(undomark);
                         theSession->ListingWindow()->WriteLine("The expressions are : " + exp[0]->Equation()+"\n");
                 }
! h; ~1 g+ J3 d" K          }
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