lib/cpPlugins/Extensions/Algorithms/GradientFunctionBase.hxx

   1 // -------------------------------------------------------------------------
   2 // @author Leonardo Florez-Valencia (florez-l@javeriana.edu.co)
   3 // -------------------------------------------------------------------------
   4
   5 #ifndef __CPPLUGINS__EXTENSIONS__ALGORITHMS__GRADIENTFUNCTIONBASE__HXX__
   6 #define __CPPLUGINS__EXTENSIONS__ALGORITHMS__GRADIENTFUNCTIONBASE__HXX__
   7
   8 // -------------------------------------------------------------------------
   9 template< class G >
  10 void cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  11 ResetBuffer( )
  12 {
  13   this->m_Buffer.clear( );
  14 }
  15
  16 // -------------------------------------------------------------------------
  17 template< class G >
  18 typename cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  19 TOutput cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  20 Evaluate( const TPoint& p ) const
  21 {
  22   TIndex i;
  23   this->GetInputImage( )->TransformPhysicalPointToIndex( p, i );
  24   return( this->EvaluateAtIndex( i ) );
  25 }
  26
  27 // -------------------------------------------------------------------------
  28 template< class G >
  29 typename cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  30 TOutput cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  31 EvaluateAtIndex( const TIndex& i ) const
  32 {
  33   TOutput res = TOutput( 0 );
  34   bool computed = false;
  35   if( this->m_BufferResults )
  36   {
  37     typename TBuffer::const_iterator bIt = this->m_Buffer.find( i );
  38     computed = ( bIt != this->m_Buffer.end( ) );
  39     res = ( computed )? bIt->second: res;
  40
  41   } // fi
  42
  43   if( !computed )
  44     res = this->_Evaluate( i );
  45
  46   if( this->m_BufferResults )
  47     this->m_Buffer[ i ] = res;
  48   return( res );
  49 }
  50
  51 // -------------------------------------------------------------------------
  52 template< class G >
  53 typename cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  54 TOutput cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  55 EvaluateAtContinuousIndex( const TContIndex& i ) const
  56 {
  57   TPoint p;
  58   this->GetInputImage( )->TransformContinuousIndexToPhysicalPoint( i, p );
  59   return( this->Evaluate( p ) );
  60 }
  61
  62 // -------------------------------------------------------------------------
  63 template< class G >
  64 cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  65 GradientFunctionBase( )
  66   : Superclass( ),
  67     m_BufferResults( false )
  68 {
  69   this->m_Buffer.clear( );
  70 }
  71
  72 // -------------------------------------------------------------------------
  73 template< class G >
  74 cpPlugins::Extensions::Algorithms::GradientFunctionBase< G >::
  75 ~GradientFunctionBase( )
  76 {
  77   this->m_Buffer.clear( );
  78 }
  79
  80 #endif // __CPPLUGINS__EXTENSIONS__ALGORITHMS__GRADIENTFUNCTIONBASE__HXX__
  81
  82 // eof - $RCSfile$