#ifndef __fpa__Base__Functors__Inverse__hxx__
#define __fpa__Base__Functors__Inverse__hxx__

// -------------------------------------------------------------------------
template< class _TInput, class _TOutput >
typename fpa::Base::Functors::Inverse< _TInput, _TOutput >::
TOutput fpa::Base::Functors::Inverse< _TInput, _TOutput >::
Evaluate( const TInput& x ) const
{
  TInput sign = TInput( ( x < TInput( 0 ) )? -1: 1 );
  TOutput y = TOutput( 1 ) / ( TOutput( 1 ) + TOutput( x * sign ) );
  if( sign < TInput( 0 ) )
    return( y * this->m_NegativeValue );
  else
    return( y );
}

// -------------------------------------------------------------------------
template< class _TInput, class _TOutput >
fpa::Base::Functors::Inverse< _TInput, _TOutput >::
Inverse( )
  : Superclass( ),
    m_NegativeValue( _TOutput( -1 ) )
{
}

// -------------------------------------------------------------------------
template< class _TInput, class _TOutput >
fpa::Base::Functors::Inverse< _TInput, _TOutput >::
~Inverse( )
{
}

#endif // __fpa__Base__Functors__Inverse__hxx__

// eof - $RCSfile$