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();
) {8 o8 r' a4 m0 p6 i: _! d$ z        UI         *theUI = UI        ::GetUI();
& y. u6 M* c+ k4 }$ x4 v        Part *workPart (theSession->Parts()->Work());

        // initialize the select
        std::vector <Selection::MaskTriple> masks(1);
, N& q5 G; A# T        Selection::MaskTriple mask;
        mask.Type=UF_feature_type;
0 G. t- B- @, S, T        mask.Subtype =0;
- `/ w2 f2 S9 e0 s3 A        mask.SolidBodySubtype=0;
$ x  b: W! V& ~0 G7 C3 F        masks.push_back(mask);
" H& o& S% O: R& E6 D        //masks[0] = {{UF_feature_type,0,0}};
        TaggedObject *object;
        std::stringstream ss;
7 m- h& ~! Q/ f2 ^9 I        Point3d cursor;
        Selection::SelectionScope scope =  Selection::SelectionScopeUseDefault;
# A$ b6 I; s4 d" D        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);
- Z+ T  L: Z4 ?$ w7 N' ~        if(res == Selection::ResponseObjectSelected || res == Selection::ResponseObjectSelectedByName)
* f+ a- E+ f! u: Z* |1 v& T9 @  r5 X                {
                        // get the information
                         getFeature = dynamic_cast<Features::Feature *>(object);
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          theSession->ListingWindow()->WriteLine("the select feature type is : " +getFeature->FeatureType() + "\n");

                 if (!strcmp(getFeature->FeatureType().GetUTF8Text(),"SPHERE"))
                 {
- q5 W0 V, i) r/ ~9 H, @: `* A+ Y# L: q                         Features::Sphere *getSphere = dynamic_cast<Features::Sphere *>(getFeature);
- B7 U$ i' A6 B                         std::vector<Expression *> exp =  getSphere->GetExpressions();
                         ss << exp.size() <<endl;
$ {5 Z2 n# I6 Q                         theSession->ListingWindow()->WriteLine("the expression number is : "  + ss.str() );
* r  r: x1 I( V8 X& m5 ^! n& K                         for(unsigned int i =0 ; i< exp.size();i++)
7 d0 l& Y2 r* F8 d- H/ U                         {   
                                  theSession->ListingWindow()->WriteLine("The expressions are : " + exp[i]->Equation()+"\n");
2 W2 U' `* [% k! C, s" t                         }
                         Session::UndoMarkId undomark = theSession->SetUndoMark(Session::MarkVisibilityVisible,"change the exp");
' X' Z. h2 A- i. v+ ]% i                         exp[0]->SetRightHandSide("400");
% o* K/ D# t% U5 G5 l1 R. W                         theSession->UpdateManager()->DoUpdate(undomark);
. A0 M- u  f4 Q7 ?% A. H                         theSession->ListingWindow()->WriteLine("The expressions are : " + exp[0]->Equation()+"\n");
+ X2 f! [( Z1 l6 j/ _" f                 }
2 q0 q  ^: B& ^) L3 ]' @! U. d* |- C          }
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