This interface should be implemented by all real first order
differential equation problems before they can be handled by the
integrators FirstOrderIntegrator#integrate method.
A first order differential equations problem, as seen by an
integrator is the time derivative dY/dt of a state
vector Y, both being one dimensional arrays. From the
integrator point of view, this derivative depends only on the
current time t and on the state vector
Y.
For real problems, the derivative depends also on parameters that do not belong to the state vector (dynamical model constants for example). These constants are completely outside of the scope of this interface, the classes that implement it are allowed to handle them as they want.
FirstOrderFieldIntegrator
| Modifier and Type | Method and Description |
|---|---|
| public T[] | Returns: time derivative of the state vectorcurrent value of the independent time variable t, T[] array containing the current value of the state vector y)Get the current time derivative of the state vector. |
| public int | |
| public void | init(T
value of the independent time variable at integration start t0, T[] array containing the value of the state vector at integration start y0, T target time for the integration finalTime)Initialize equations at the start of an ODE integration. |
| computeDerivatives | back to summary |
|---|---|
| public T[] computeDerivatives(T t, T[] y) Get the current time derivative of the state vector.
| |
| getDimension | back to summary |
|---|---|
| public int getDimension() Get the dimension of the problem.
| |
| init | back to summary |
|---|---|
| public void init(T t0, T[] y0, T finalTime) Initialize equations at the start of an ODE integration. This method is called once at the start of the integration. It may be used by the equations to initialize some internal data if needed.
| |