lib/fpa/Filters/RandomWalker.hxx

   1 // =========================================================================
   2 // @author Leonardo Florez Valencia
   3 // @email florez-l@javeriana.edu.co
   4 // =========================================================================
   5 #ifndef __fpa__Filters__RandomWalker__hxx__
   6 #define __fpa__Filters__RandomWalker__hxx__
   7
   8 // -------------------------------------------------------------------------
   9 template< class _TDataInterface >
  10 void fpa::Filters::RandomWalker< _TDataInterface >::
  11 SetWeightFunction( TScalarWeight* p )
  12 {
  13   if( this->m_ScalarWeight.GetPointer( ) != p )
  14   {
  15     this->_Deassociate( this->m_ScalarWeight );
  16     this->m_ScalarWeight = p;
  17     this->_Associate( this->m_ScalarWeight );
  18     this->Modified( );
  19
  20   } // fi
  21 }
  22
  23 // -------------------------------------------------------------------------
  24 template< class _TDataInterface >
  25 void fpa::Filters::RandomWalker< _TDataInterface >::
  26 SetWeightFunction( TVertexWeight* p )
  27 {
  28   if( this->m_VertexWeight.GetPointer( ) != p )
  29   {
  30     this->_Deassociate( this->m_VertexWeight );
  31     this->m_VertexWeight = p;
  32     this->_Associate( this->m_VertexWeight );
  33     this->Modified( );
  34
  35   } // fi
  36 }
  37
  38 // -------------------------------------------------------------------------
  39 template< class _TDataInterface >
  40 fpa::Filters::RandomWalker< _TDataInterface >::
  41 RandomWalker( )
  42   : Superclass( false )
  43 {
  44   this->SetInitValue( TCost( 0 ) );
  45   /* TODO
  46      this->SetWeight(
  47      fpa::Functors::RegionGrow::Tautology< TInputValue >::New( )
  48      );
  49   */
  50 }
  51
  52 // -------------------------------------------------------------------------
  53 template< class _TDataInterface >
  54 fpa::Filters::RandomWalker< _TDataInterface >::
  55 ~RandomWalker( )
  56 {
  57 }
  58
  59 // -------------------------------------------------------------------------
  60 template< class _TDataInterface >
  61 void fpa::Filters::RandomWalker< _TDataInterface >::
  62 _PostComputeOutputValue( TNode& n )
  63 {
  64   // Nothing to do with this algorithm
  65 }
  66
  67 // -------------------------------------------------------------------------
  68 template< class _TDataInterface >
  69 void fpa::Filters::RandomWalker< _TDataInterface >::
  70 _PreComputeOutputValue( TNode& n )
  71 {
  72   if( this->m_VertexWeight.IsNotNull( ) )
  73   {
  74     TCost c = this->m_VertexWeight->Evaluate( n.Vertex, n.Parent );
  75     if( this->m_ScalarWeight.IsNotNull( ) )
  76       c = this->m_ScalarWeight->Evaluate( c );
  77     n.Value = c + this->_GetOutputValue( n.Parent );
  78   }
  79   else
  80     n.Value = TCost( -1 );
  81 }
  82
  83 #endif // __fpa__Filters__RandomWalker__hxx__
  84 // eof - $RCSfile$