StateFunction (OREKIT 13.0-SNAPSHOT API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface StateFunction
```
Interface representing a vector function depending on SpacecraftState.

Since:

8.0

Author:

Luc Maisonobe

See Also:

Differentiation.differentiate(StateFunction, int, org.orekit.attitudes.AttitudeProvider, org.orekit.orbits.OrbitType, org.orekit.orbits.PositionAngleType, double, int), StateJacobian

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  double[] value(SpacecraftState state)
  Evaluate the function.

- Method Detail
  - value
```
double[] value(SpacecraftState state)
```
    Evaluate the function.
    
    Parameters:
    
    state - spacecraft state as the sole free parameter of the function.
    
    Returns:
    
    vector value of the function