Deriv.hh
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/*
* Deriv.hh
*
* Created on: Dec 3, 2012
* Author: f.casimir
*/
#ifndef Deriv_HH_
#define Deriv_HH_
#include "Parameter.hh"
#include "ParamData.hh"
#include "DataTypeMath.hh"
#include "Operation.hh"
namespace AMDA {
namespace Parameters {
/**
* @class Deriv
* @brief It is responsible to compute the deriv data.
* @details This class implement the interface Operation.
* @code
* 3 point Lagrangian interpolation (points {x0,y0; x1,y1; x2,y2}):
* df/dx = y0*(2x-x1-x2)/(x01*x02) + y1*(2x-x0-x2)/(x10*x12)+y2*(2x-x0-x1)/(x20*x21),
* where
* x01= x0-x1; x02=x0-x2, x12=x1-x2...
* @endcode
*/
template<class TParamData>
class Deriv : public Operation {
public:
/**
* @brief Constructor.
* @details Create the ParamData type of the input ParamData.
*/
Deriv(Process& pProcess, TParamData& paramInput)
: Operation(pProcess),
_paramInput(paramInput),
_paramOutput(new TParamData()),
_index(0),
_lastDataWrite(false) {
_paramDataOutput=_paramOutput;
}
/**
* @overload Operation::write(ParamDataIndexInfo &pParamDataIndexInfo)
*/
void write(ParamDataIndexInfo &pParamDataIndexInfo) {
typename TParamData::ElementType y0;
typename TParamData::ElementType y1;
typename TParamData::ElementType y2;
typename TParamData::ElementType res;
double x0 = 0;
double x1 = 0;
double x2 = 0;
double x02 = 0;
double x01 = 0;
double x10 = 0;
double x12 = 0;
double x20 = 0;
double x21 = 0;
double _2x = 0;
double x = 0;
//if first compute
if(_index == 0 ) {
if ((pParamDataIndexInfo._startIndex + pParamDataIndexInfo._nbDataToProcess) > 2) {
y0 = _paramInput.getDataList()[_index];
y1 = _paramInput.getDataList()[_index + 1];
y2 = _paramInput.getDataList()[_index + 2];
x = x0 =_paramInput.getTime(_index) ;
x1 = _paramInput.getTime(_index + 1) ;
x2 = _paramInput.getTime(_index + 2) ;
x02 = x0 -x2;
x01 = x0 -x1;
x10 = x1 -x0;
x12 = x1 -x2;
x20 =x2 - x0 ;
x21 = x2 -x1;
_2x = 2*x;
res = y0*(_2x-x1-x2)/(x01*x02) + y1*(_2x-x0-x2)/(x10*x12)+y2*(_2x-x0-x1)/(x20*x21);
_paramOutput->getDataList().push_back(res);
_paramOutput->pushTime(x);
++_index;
}
}
//if last compute
if( pParamDataIndexInfo._nbDataToProcess == 0 && !_lastDataWrite) {
y0 = _paramInput.getDataList()[_index - 2];
y1 = _paramInput.getDataList()[_index - 1];
y2 = _paramInput.getDataList()[_index ];
x0 =_paramInput.getTime(_index - 2) ;
x1 = _paramInput.getTime(_index - 1) ;
x = x2 = _paramInput.getTime(_index) ;
x02 = x0 -x2;
x01 = x0 -x1;
x10 = x1 -x0;
x12 = x1 -x2;
x20 =x2 - x0 ;
x21 = x2 -x1;
_2x = 2*x;
res = y0*(_2x-x1-x2)/(x01*x02) + y1*(_2x-x0-x2)/(x10*x12)+y2*(_2x-x0-x1)/(x20*x21);
_paramOutput->getDataList().push_back(res);
_paramOutput->pushTime(x);
_lastDataWrite = true;
}
//classic compute
while (_index< pParamDataIndexInfo._startIndex + pParamDataIndexInfo._nbDataToProcess - 1) {
//df/dt = y0*(2x-x1-x2)/(x01*x02) + y1*(2x-x0-x2)/(x10*x12)+y2*(2x-x0-x1)/(x20*x21),
y0 = _paramInput.getDataList()[_index - 1];
y1 = _paramInput.getDataList()[_index ];
y2 = _paramInput.getDataList()[_index + 1];
x0 =_paramInput.getTime(_index - 1) ;
x = x1 = _paramInput.getTime(_index) ;
x2 = _paramInput.getTime(_index + 1) ;
x02 = x0 -x2;
x01 = x0 -x1;
x10 = x1 -x0;
x12 = x1 -x2;
x20 =x2 - x0 ;
x21 = x2 -x1;
_2x = 2*x;
res = y0*(_2x-x1-x2)/(x01*x02) + y1*(_2x-x0-x2)/(x10*x12)+y2*(_2x-x0-x1)/(x20*x21);
_paramOutput->getDataList().push_back(res);
_paramOutput->pushTime(x);
++_index;
}
}
private:
/**<
* @brief It is the channel of data derived
*/
TParamData &_paramInput;
/**<
* @brief It is the channel of the data derived
*/
TParamData *_paramOutput;
/**<
* index current of compute
*/
unsigned int _index ;
/**<
* true when last data is write.
*/
bool _lastDataWrite;
};
} /* namespace Parameters */
} /* namespace AMDA */
#endif /* Deriv_HH_ */