SimpleComponentFTMachine.h

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//# SimpleComponentFTMachine.h: Definition for SimpleComponentFTMachine
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//# $Id$

#ifndef SYNTHESIS_SIMPLECOMPONENTFTMACHINE_H
#define SYNTHESIS_SIMPLECOMPONENTFTMACHINE_H

#include <msvis/MSVis/VisBuffer.h>
#include <synthesis/TransformMachines/ComponentFTMachine.h>
#include <measures/Measures/MDirection.h>
#include <measures/Measures/MPosition.h>
#include <casa/Arrays/Array.h>
#include <casa/Arrays/Vector.h>
#include <casa/Arrays/Matrix.h>
#include <casa/Logging/LogIO.h>
#include <casa/Logging/LogSink.h>
#include <casa/Logging/LogMessage.h>


namespace casa { //# NAMESPACE CASA - BEGIN

// <summary>  does the simplest Fourier transform on SkyComponents </summary>

// <use visibility=export>

// <reviewed reviewer="" date="" tests="" demos="">

// <prerequisite>
//   <li> <linkto class=ComponentFTMachine>ComponentFTMachine</linkto> class
//   <li> <linkto class=SkyEquation>SkyEquation</linkto> class
//   <li> <linkto class=VisBuffer>VisBuffer</linkto> module
// </prerequisite>
//
// <etymology>
// ComponentFTMachine is a Machine for Fourier Transforms of
// SkyComponents
// </etymology>
//
// <synopsis> 
// Does a simple transform of a sky component. The phase term
// is fully accurate but no smearing is included.
// </synopsis> 
//
// <example>
// </example>
//
// <motivation>
// Allow transformation of sky components.
//
// </motivation>
//
// <todo asof="97/10/01">
// </todo>


// Forward declarations
class ComponentList;


class SimpleComponentFTMachine : public ComponentFTMachine {
public:

  // Get actual coherence 
  virtual void get(VisBuffer& vb, const ComponentList& compList, casacore::Int row=-1);
  // Get actual coherence 
  virtual void get(VisBuffer& vb, SkyComponent& skycomponent, casacore::Int row=-1);

protected:
  void applyPhasor(const casacore::Int part, const casacore::Block<casacore::Int>& startrow, 
                   const casacore::Vector<casacore::uInt>& nRowp,  
                   const casacore::Vector<casacore::Double>& dphase,  const casacore::Vector<casacore::Double>& invLambda, 
                   const casacore::Int npol, const casacore::Int nchan, 
                   const casacore::Vector<casacore::Int>& corrType, 
                   const casacore::Cube<casacore::DComplex>& dVis, casacore::Complex*& modData);
  
  void predictVis(casacore::Complex*& modData, const casacore::Vector<casacore::Double>& invLambda, 
                  const casacore::Vector<casacore::Double>& frequency, 
                  const ComponentList& compList, 
                  ComponentType::Polarisation poltype, const casacore::Vector<casacore::Int>& corrType, 
                  const casacore::uInt startrow, const casacore::uInt nrows, 
                  const casacore::uInt nchan, const casacore::uInt npol, 
                  const casacore::Block<casacore::Matrix<casacore::Double> > & uvwcomp, 
                  const casacore::Block<casacore::Vector<casacore::Double> > & dphasecomp);

};

} //# NAMESPACE CASA - END

#endif