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/***********************************************/
/**
* @file parametrizationTemporalSplines.cpp
*
* @brief Splines expansion.
* @see ParametrizationTemporal
*
* @author Torsten Mayer-Guerr
* @date 2011-12-28
*
*/
/***********************************************/
#include "base/import.h"
#include "base/basisSplines.h"
#include "config/config.h"
#include "inputOutput/logging.h"
#include "classes/timeSeries/timeSeries.h"
#include "classes/parametrizationTemporal/parametrizationTemporal.h"
#include "parametrizationTemporalSplines.h"
/***********************************************/
ParametrizationTemporalSplines::ParametrizationTemporalSplines(Config &config)
{
try
{
TimeSeriesPtr timeSeriesPtr, timesIntervalPtr;
readConfig(config, "degree", degree, Config::MUSTSET, "", "degree of splines");
readConfig(config, "timeSeries", timeSeriesPtr, Config::MUSTSET, "", "nodal points in time domain");
readConfig(config, "intervals", timesIntervalPtr, Config::DEFAULT, "", "");
readConfig(config, "includeLastTime", includeLastTime, Config::DEFAULT, "0", "");
if(isCreateSchema(config)) return;
times = timeSeriesPtr->times();
// init time intervals
// -------------------
std::vector<Time> timesInterval = timesIntervalPtr->times();
isInterval = (timesInterval.size() != 0);
if(!isInterval)
timesInterval = {times.at(0), times.back()};
computeIntervals(timesInterval);
idxStart = 0;
idxEnd = idEpochStart.size();
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
void ParametrizationTemporalSplines::computeIntervals(const std::vector<Time> ×Interval)
{
try
{
idEpochStart.clear();
idEpochEnd.clear();
for(UInt idInterval=0; idInterval<timesInterval.size()-1; idInterval++)
{
UInt start = 0;
while((start+1<times.size()) && (times.at(start+1)<=timesInterval.at(idInterval)))
start++;
UInt count = 0;
while((start+count<times.size()) && (times.at(start+count)<=timesInterval.at(idInterval+1)))
count++;
if(count==0)
continue;
for(UInt n=0; n<degree; n++)
idEpochStart.push_back(start);
for(UInt i=0; i<count-1; i++)
{
idEpochStart.push_back(start+i);
idEpochEnd.push_back(start+i+1);
}
for(UInt n=0; n<degree; n++)
idEpochEnd.push_back(start+count-1);
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
Bool ParametrizationTemporalSplines::setInterval(const Time &timeStart, const Time &timeEnd, Bool estimatePerArc)
{
try
{
const UInt idxStartOld = idxStart;
const UInt idxEndOld = idxEnd;
if((timeEnd<=times.at(0)) || (timeStart>=times.back()))
{
idxStart = idxEnd = 0; // time interval outside spline nodal points
return (idxStartOld != idxStart) || (idxEndOld != idxEnd);
}
if(estimatePerArc && !isInterval)
computeIntervals({timeStart, timeEnd});
idxStart = 0;
while((idxStart<idEpochEnd.size()) && (times.at(idEpochEnd.at(idxStart))<=timeStart))
idxStart++;
idxEnd = idxStart;
while((idxEnd<idEpochStart.size()) && (times.at(idEpochStart.at(idxEnd))<timeEnd))
idxEnd++;
return (idxStartOld != idxStart) || (idxEndOld != idxEnd);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
void ParametrizationTemporalSplines::parameterName(std::vector<ParameterName> &name) const
{
try
{
for(UInt i=idxStart; i<idxEnd; i++)
name.push_back(ParameterName("", "", "spline.n"+degree%"%i"s, times.at(idEpochStart.at(i)), times.at(idEpochEnd.at(i))));
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
void ParametrizationTemporalSplines::factors(const Time &time, UInt startIndex, std::vector<UInt> &index, std::vector<Double> &factor) const
{
try
{
if(idxEnd == idxStart)
return;
if((time < times.at(idEpochStart.at(idxStart))) || (time > times.at(idEpochEnd.at(idxEnd-1))) || (!includeLastTime && (time == times.at(idEpochEnd.at(idxEnd-1)))))
return;
// find first used parameter
UInt idx = idxStart;
while((idx+1+degree < idxEnd) && (time >= times.at(idEpochEnd.at(idx))))
idx++;
const UInt idEpoch = idEpochEnd.at(idx)-1;
const Double t = (time-times.at(idEpoch)).mjd()/(times.at(idEpoch+1)-times.at(idEpoch)).mjd();
const Vector f = BasisSplines::compute(t, degree);
for(UInt i=0; i<=degree; i++)
if(std::fabs(f(i)) > 1e-8)
{
index.push_back( i+idx-idxStart+startIndex );
factor.push_back( f(i) );
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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