fr.cnes.sirius.patrius.math.ode.nonstiff.cowell

Interface SecondOrderStateMapper

All Superinterfaces:

Externalizable, Serializable

All Known Implementing Classes:

SecondOrderMapper

public interface SecondOrderStateMapper
extends Externalizable

Mapper for second order integrator state vector. This mapper maps a full first order state vs a second order state (y, yDot). First order state is used for FirstOrderIntegrator, second order state is used for second order integrator such as CowellIntegrator.

For example for PV coordinates integration:

• Full first order state is (x, y, z, vx, vy, vz). This state is built from second order state and state derivative using method buildFullState(double[], double[])
• Second order state y is (x, y, z). This state is retrieved using method extractY(double[])
• Second order state derivative yDot is (vx, vy, vz). This state derivative is retrieved from first order state vector using methode extractYDot(double[])

Author:

Emmanuel Bignon

Method Summary

Modifier and Type	Method and Description
double[]	buildFullState(double[] y, double[] yDot) Build full first order state from second order y and yDot.
double[]	extractY(double[] fullState) Retrieve second order state y from full first order state.
double[]	extractYDot(double[] fullState) Retrieve second order state derivative yDot from full first order state.

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Method Detail

buildFullState

double[] buildFullState(double[] y,
                        double[] yDot)

Build full first order state from second order y and yDot.

Parameters:

y - second order state y

yDot - second order state derivative yDot

Returns:

full first order state

extractY

double[] extractY(double[] fullState)

Retrieve second order state y from full first order state.

Parameters:

fullState - full first order state

Returns:

second order state y

extractYDot

double[] extractYDot(double[] fullState)

Retrieve second order state derivative yDot from full first order state.

Parameters:

fullState - full first order state

Returns:

second order state derivative yDot