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java.lang.Objectorg.orekit.propagation.analytical.twod.AbstractDateIntervalFunction
org.orekit.propagation.analytical.twod.DateIntervalParabolicFunction
public class DateIntervalParabolicFunction
This class represents a piecewise 2nd order polynomial function of date.
The function is defined by an initial condition (x0, xDot0) at a date t[0] and all second derivatives xDotDot[i] on
intervals [t[i],t[i+1]]. For date out of bounds, 2nd derivative is considered as zero.
Constructor Summary | |
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DateIntervalParabolicFunction(DateIntervalParabolicFunction function)
Clone constructor. |
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DateIntervalParabolicFunction(double ax0,
double axDot0,
AbsoluteDate[] timeIntervals,
double[] axDotDotIntervals)
Constructor. |
Method Summary | |
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double |
getX0()
Returns value at first date. |
double |
getxDot0()
Returns first derivative value at first date. |
double[] |
getxDotDotIntervals()
Returns a copy of 1st order derivatives on date intervals. |
double |
value(AbsoluteDate t)
Returns value of function at provided date. |
Methods inherited from class org.orekit.propagation.analytical.twod.AbstractDateIntervalFunction |
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getDateIntervals, getIndexInterval |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DateIntervalParabolicFunction(double ax0, double axDot0, AbsoluteDate[] timeIntervals, double[] axDotDotIntervals)
ax0
- value at first date t[0]axDot0
- 1st derivative at first date t[0]timeIntervals
- date intervals (must be chronologically sorted)axDotDotIntervals
- 2nd order derivatives on date intervals (size of vector must be of
timeIntervals size - 1)public DateIntervalParabolicFunction(DateIntervalParabolicFunction function)
function
- function to copyMethod Detail |
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public double getX0()
public double getxDot0()
public double[] getxDotDotIntervals()
public double value(AbsoluteDate t)
t
- a date
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