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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6 W6 Z0 Y) M6 N' q( B% Y' R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！

  H& g1 f% @. R! YSession *theSession = Session::GetSession();
( {3 W! I/ N  Y3 c        UI         *theUI = UI        ::GetUI();
        Part *workPart (theSession->Parts()->Work());
1 `2 s) J- ~& w$ c/ c+ g) v0 O: [
        // initialize the select
- A5 V" v( B# {6 V3 U$ n9 x# m0 D        std::vector <Selection::MaskTriple> masks(1);
        Selection::MaskTriple mask;
        mask.Type=UF_feature_type;
        mask.Subtype =0;
1 Y5 Y' M9 l" m, |        mask.SolidBodySubtype=0;
        masks.push_back(mask);
0 @4 m* l( ~; K8 c1 X+ f' o        //masks[0] = {{UF_feature_type,0,0}};
- o7 A) z5 D. w7 b        TaggedObject *object;
+ h4 i' m, b' F6 u        std::stringstream ss;
% O+ s  j: f( C& a  i. L6 F; V        Point3d cursor;
        Selection::SelectionScope scope =  Selection::SelectionScopeUseDefault;
$ v0 [: S6 f9 X. A) p        Selection::SelectionAction action = Selection::SelectionActionClearAndEnableSpecific;
4 {$ [- G2 }% c" D3 j        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)
                {
$ J' j6 u4 l, V1 x                        // get the information
2 P$ @& U( z: p- P0 G: q9 N% w                         getFeature = dynamic_cast<Features::Feature *>(object);

% H, [% S% i, Q1 N% O          theSession->ListingWindow()->WriteLine("the select feature type is : " +getFeature->FeatureType() + "\n");

6 \8 D: W; p& r- q                 if (!strcmp(getFeature->FeatureType().GetUTF8Text(),"SPHERE"))
+ P& u) @( e" c% \$ K                 {
                         Features::Sphere *getSphere = dynamic_cast<Features::Sphere *>(getFeature);
5 H. }! z, ~- r5 M( k. i                         std::vector<Expression *> exp =  getSphere->GetExpressions();
                         ss << exp.size() <<endl;
5 A! ~% G* B* \( z( I8 a4 y4 }                         theSession->ListingWindow()->WriteLine("the expression number is : "  + ss.str() );
5 N7 k9 d0 O6 b                         for(unsigned int i =0 ; i< exp.size();i++)
: |7 j5 n& X, [6 V* x5 r                         {   
                                  theSession->ListingWindow()->WriteLine("The expressions are : " + exp[i]->Equation()+"\n");
                         }
                         Session::UndoMarkId undomark = theSession->SetUndoMark(Session::MarkVisibilityVisible,"change the exp");
$ C. k) T/ ?* ~7 I" {) b2 U  L                         exp[0]->SetRightHandSide("400");
1 c& Y. U5 B+ B/ P# S, h                         theSession->UpdateManager()->DoUpdate(undomark);
4 ]: O1 p" W' D' s% U8 H% u' E; ~                         theSession->ListingWindow()->WriteLine("The expressions are : " + exp[0]->Equation()+"\n");
                 }
0 X$ a3 F- f+ o9 H1 e6 k  x. W          }