src/Visual3d/Visual3d_PickDescriptor.cxx

   1
   2 // File         Visual3d_PickDescriptor.cxx
   3 // Created      Fevrier 1992
   4 // Author       NW,JPB,CAL
   5
   6 //-Copyright    MatraDatavision 1991,1992
   7
   8 //-Version
   9
  10 //-Design       Declaration of variables specific to the class
  11 //              describing marking.
  12
  13 //-Warning      A return of marking is defined by :
  14 //              - sequence of (Elem_Num, Pick_Id, Structure)
  15 //              - depth
  16
  17 //-References
  18
  19 //-Language     C++ 2.0
  20
  21 //-Declarations
  22
  23 // for the class
  24 #include <Visual3d_PickDescriptor.ixx>
  25
  26 //-Aliases
  27
  28 //-Global data definitions
  29
  30 //      -- sequence reperee
  31 //      MyPickPathSequence      :       HSequenceOfPickPath;
  32
  33 //      -- contexte picking de reperage associe
  34 //      MyContext               :       ContextPick;
  35
  36 //-Constructors
  37
  38 //-Destructors
  39
  40 //-Methods, in order
  41
  42 Visual3d_PickDescriptor::Visual3d_PickDescriptor (const Visual3d_ContextPick& CTXP):
  43 MyContext (CTXP) {
  44
  45         MyPickPathSequence      = new Visual3d_HSequenceOfPickPath ();
  46
  47 }
  48
  49 void Visual3d_PickDescriptor::AddPickPath (const Visual3d_PickPath& APickPath) {
  50
  51         if (MyContext.Depth () > MyPickPathSequence->Length ())
  52                 MyPickPathSequence->Append (APickPath);
  53
  54 }
  55
  56 void Visual3d_PickDescriptor::Clear () {
  57
  58         MyPickPathSequence->Clear ();
  59
  60 }
  61
  62 Standard_Integer Visual3d_PickDescriptor::Depth () const {
  63
  64         return (MyPickPathSequence->Length ());
  65
  66 }
  67
  68 Handle(Graphic3d_Structure) Visual3d_PickDescriptor::TopStructure () const {
  69
  70 Visual3d_PickPath Result;
  71
  72         if (MyPickPathSequence->IsEmpty ())
  73                 Visual3d_PickError::Raise ("PickDescriptor empty");
  74
  75         switch (MyContext.Order ()) {
  76
  77                 case Visual3d_TOO_TOPFIRST :
  78                         // MyPickPathSequence->First returns the first
  79                         // PickPath found in the sequence.
  80                         Result  = MyPickPathSequence->Sequence().First ();
  81                 break;
  82
  83                 case Visual3d_TOO_BOTTOMFIRST :
  84                         // MyPickPathSequence->Last returns the last
  85                         // PickPath found in the sequence.
  86                         Result  = MyPickPathSequence->Sequence().Last ();
  87                 break;
  88
  89         }
  90         return (Result.StructIdentifier ());
  91 }
  92
  93 Standard_Integer Visual3d_PickDescriptor::TopPickId () const {
  94
  95 Visual3d_PickPath Result;
  96
  97         if (MyPickPathSequence->IsEmpty ())
  98                 Visual3d_PickError::Raise ("PickDescriptor empty");
  99
 100         switch (MyContext.Order ()) {
 101
 102                 case Visual3d_TOO_TOPFIRST :
 103                         // MyPickPathSequence->First returns the first
 104                         // PickPath found in the sequence.
 105                         Result  = MyPickPathSequence->Sequence().First ();
 106                 break;
 107
 108                 case Visual3d_TOO_BOTTOMFIRST :
 109                         // MyPickPathSequence->Last returns the last
 110                         // PickPath found in the sequence.
 111                         Result  = MyPickPathSequence->Sequence().Last ();
 112                 break;
 113
 114         }
 115         return (Result.PickIdentifier ());
 116 }
 117
 118 Standard_Integer Visual3d_PickDescriptor::TopElementNumber () const {
 119
 120 Visual3d_PickPath Result;
 121
 122         if (MyPickPathSequence->IsEmpty ())
 123                 Visual3d_PickError::Raise ("PickDescriptor empty");
 124
 125         switch (MyContext.Order ()) {
 126
 127                 case Visual3d_TOO_TOPFIRST :
 128                         // MyPickPathSequence->First returns the first
 129                         // PickPath found in the sequence.
 130                         Result  = MyPickPathSequence->Sequence().First ();
 131                 break;
 132
 133                 case Visual3d_TOO_BOTTOMFIRST :
 134                         // MyPickPathSequence->Last returns the last
 135                         // PickPath found in the sequence.
 136                         Result  = MyPickPathSequence->Sequence().Last ();
 137                 break;
 138
 139         }
 140         return (Result.ElementNumber ());
 141 }
 142
 143 Handle(Visual3d_HSequenceOfPickPath) Visual3d_PickDescriptor::PickPath () const {
 144
 145         return (Handle(Visual3d_HSequenceOfPickPath)::DownCast
 146                                         (MyPickPathSequence->ShallowCopy ()));
 147
 148 }