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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math3.ode;
import org.apache.commons.math3.exception.MathIllegalArgumentException;
import org.apache.commons.math3.exception.MathIllegalStateException;
/**
* This interface represents a second order integrator for differential equations.
*
* <p>The classes which are devoted to solve second order differential equations should implement
* this interface. The problems which can be handled should implement the {@link
* SecondOrderDifferentialEquations} interface.
*
* @see SecondOrderDifferentialEquations
* @since 1.2
*/
public interface SecondOrderIntegrator extends ODEIntegrator {
/**
* Integrate the differential equations up to the given time
*
* @param equations differential equations to integrate
* @param t0 initial time
* @param y0 initial value of the state vector at t0
* @param yDot0 initial value of the first derivative of the state vector at t0
* @param t target time for the integration (can be set to a value smaller thant <code>t0</code>
* for backward integration)
* @param y placeholder where to put the state vector at each successful step (and hence at the
* end of integration), can be the same object as y0
* @param yDot placeholder where to put the first derivative of the state vector at time t, can
* be the same object as yDot0
* @throws MathIllegalStateException if the integrator cannot perform integration
* @throws MathIllegalArgumentException if integration parameters are wrong (typically too small
* integration span)
*/
void integrate(
SecondOrderDifferentialEquations equations,
double t0,
double[] y0,
double[] yDot0,
double t,
double[] y,
double[] yDot)
throws MathIllegalStateException, MathIllegalArgumentException;
}
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