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！
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Session *theSession = Session::GetSession();
/ ]7 {# Z, |1 |! l- l1 n0 i3 ^# u        UI         *theUI = UI        ::GetUI();
/ ~; \7 J7 P; a1 H& J) [/ j, `        Part *workPart (theSession->Parts()->Work());

" ~; L+ H- J/ K2 S9 j/ @        // initialize the select
        std::vector <Selection::MaskTriple> masks(1);
        Selection::MaskTriple mask;
        mask.Type=UF_feature_type;
( U9 b& G8 F. I+ G        mask.Subtype =0;
4 E3 e* G9 U% o0 w5 Z' Z        mask.SolidBodySubtype=0;
7 N- s/ j$ a. W; F* I7 F        masks.push_back(mask);
        //masks[0] = {{UF_feature_type,0,0}};
7 V; a* k9 C  P2 \) x        TaggedObject *object;
, m+ `6 W! ]. V6 o        std::stringstream ss;
        Point3d cursor;
        Selection::SelectionScope scope =  Selection::SelectionScopeUseDefault;
3 G& G! j& a% J) c( ?        Selection::SelectionAction action = Selection::SelectionActionClearAndEnableSpecific;
        Selection::Response res;
8 n  b8 q# H4 P+ s; `% I8 B1 u        Features::Feature * getFeature = NULL;
* }# O# G9 c" q; m        res = theUI->SelectionManager()->SelectTaggedObject("select a feature:","feature select",scope,action,false,false,masks,&object,&cursor);
        if(res == Selection::ResponseObjectSelected || res == Selection::ResponseObjectSelectedByName)
                {
                        // get the information
& R/ j. k1 x3 J" z. N9 c0 d) P                         getFeature = dynamic_cast<Features::Feature *>(object);
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          theSession->ListingWindow()->WriteLine("the select feature type is : " +getFeature->FeatureType() + "\n");
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  d' [9 ?4 B) K8 W                 if (!strcmp(getFeature->FeatureType().GetUTF8Text(),"SPHERE"))
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2 \/ I) o, E8 @3 @% l) d  m                         Features::Sphere *getSphere = dynamic_cast<Features::Sphere *>(getFeature);
                         std::vector<Expression *> exp =  getSphere->GetExpressions();
% f( h9 ^% f6 d" J% o0 t1 C+ c                         ss << exp.size() <<endl;
1 l5 N1 G, O, _: Z                         theSession->ListingWindow()->WriteLine("the expression number is : "  + ss.str() );
                         for(unsigned int i =0 ; i< exp.size();i++)
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. D( d: r* A: W! S* x3 f                                  theSession->ListingWindow()->WriteLine("The expressions are : " + exp[i]->Equation()+"\n");
                         }
                         Session::UndoMarkId undomark = theSession->SetUndoMark(Session::MarkVisibilityVisible,"change the exp");
" I9 {6 W5 y# J# S                         exp[0]->SetRightHandSide("400");
                         theSession->UpdateManager()->DoUpdate(undomark);
8 S) s" i$ W+ G) I8 y                         theSession->ListingWindow()->WriteLine("The expressions are : " + exp[0]->Equation()+"\n");
                 }
' T: S; b# w( E; F& w6 L$ [. W$ P          }
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