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 #include <limits>
   9
  10 // -------------------------------------------------------------------------
  11 template< class _TDataInterface >
  12 void fpa::Filters::RandomWalker< _TDataInterface >::
  13 SetWeightFunction( TScalarWeight* p )
  14 {
  15   if( this->m_ScalarWeight.GetPointer( ) != p )
  16   {
  17     this->_Deassociate( this->m_ScalarWeight );
  18     this->m_ScalarWeight = p;
  19     this->_Associate( this->m_ScalarWeight );
  20     this->Modified( );
  21
  22   } // fi
  23 }
  24
  25 // -------------------------------------------------------------------------
  26 template< class _TDataInterface >
  27 void fpa::Filters::RandomWalker< _TDataInterface >::
  28 SetWeightFunction( TVertexWeight* p )
  29 {
  30   if( this->m_VertexWeight.GetPointer( ) != p )
  31   {
  32     this->_Deassociate( this->m_VertexWeight );
  33     this->m_VertexWeight = p;
  34     this->_Associate( this->m_VertexWeight );
  35     this->Modified( );
  36
  37   } // fi
  38 }
  39
  40 // -------------------------------------------------------------------------
  41 template< class _TDataInterface >
  42 fpa::Filters::RandomWalker< _TDataInterface >::
  43 RandomWalker( )
  44   : Superclass( false )
  45 {
  46   this->SetInitValue( TCost( 0 ) );
  47   this->SetFillValue( std::numeric_limits< TCost >::max( ) );
  48   /* TODO
  49      this->SetWeight(
  50      fpa::Functors::RegionGrow::Tautology< TInputValue >::New( )
  51      );
  52   */
  53 }
  54
  55 // -------------------------------------------------------------------------
  56 template< class _TDataInterface >
  57 fpa::Filters::RandomWalker< _TDataInterface >::
  58 ~RandomWalker( )
  59 {
  60 }
  61
  62 // -------------------------------------------------------------------------
  63 template< class _TDataInterface >
  64 void fpa::Filters::RandomWalker< _TDataInterface >::
  65 _PostComputeOutputValue( TNode& n )
  66 {
  67   // Nothing to do with this algorithm
  68 }
  69
  70 // -------------------------------------------------------------------------
  71 template< class _TDataInterface >
  72 void fpa::Filters::RandomWalker< _TDataInterface >::
  73 _PreComputeOutputValue( TNode& n )
  74 {
  75   if( this->m_VertexWeight.IsNotNull( ) )
  76   {
  77     TCost c = this->m_VertexWeight->Evaluate( n.Vertex, n.Parent );
  78     if( this->m_ScalarWeight.IsNotNull( ) )
  79       c = this->m_ScalarWeight->Evaluate( c );
  80     n.Value = c + this->_GetOutputValue( n.Parent );
  81   }
  82   else
  83     n.Value = TCost( -1 );
  84 }
  85
  86 #endif // __fpa__Filters__RandomWalker__hxx__
  87 // eof - $RCSfile$