1dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond/* 2dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * Licensed to the Apache Software Foundation (ASF) under one or more 3dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * contributor license agreements. See the NOTICE file distributed with 4dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * this work for additional information regarding copyright ownership. 5dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * The ASF licenses this file to You under the Apache License, Version 2.0 6dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * (the "License"); you may not use this file except in compliance with 7dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the License. You may obtain a copy of the License at 8dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 9dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * http://www.apache.org/licenses/LICENSE-2.0 10dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 11dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * Unless required by applicable law or agreed to in writing, software 12dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * distributed under the License is distributed on an "AS IS" BASIS, 13dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * See the License for the specific language governing permissions and 15dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * limitations under the License. 16dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 17dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 18dee0849a9704d532af0b550146cbafbaa6ee1d19Raymondpackage org.apache.commons.math.ode; 19dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 20dee0849a9704d532af0b550146cbafbaa6ee1d19Raymondimport org.apache.commons.math.ode.DerivativeException; 21dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 22dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 23dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond/** This interface represents a second order integrator for 24dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * differential equations. 25dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 26dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>The classes which are devoted to solve second order differential 27dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * equations should implement this interface. The problems which can 28dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * be handled should implement the {@link 29dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * SecondOrderDifferentialEquations} interface.</p> 30dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 31dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @see SecondOrderDifferentialEquations 32dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $ 33dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @since 1.2 34dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 35dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 36dee0849a9704d532af0b550146cbafbaa6ee1d19Raymondpublic interface SecondOrderIntegrator extends ODEIntegrator { 37dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 38dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Integrate the differential equations up to the given time 39dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param equations differential equations to integrate 40dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param t0 initial time 41dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param y0 initial value of the state vector at t0 42dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param yDot0 initial value of the first derivative of the state 43dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * vector at t0 44dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param t target time for the integration 45dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * (can be set to a value smaller thant <code>t0</code> for backward integration) 46dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param y placeholder where to put the state vector at each 47dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * successful step (and hence at the end of integration), can be the 48dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * same object as y0 49dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param yDot placeholder where to put the first derivative of 50dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector at time t, can be the same object as yDot0 51dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @throws IntegratorException if the integrator cannot perform integration 52dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @throws DerivativeException this exception is propagated to the caller if the 53dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * underlying user function triggers one 54dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 55dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond void integrate(SecondOrderDifferentialEquations equations, 56dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond double t0, double[] y0, double[] yDot0, 57dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond double t, double[] y, double[] yDot) 58dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond throws DerivativeException, IntegratorException; 59dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 60dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond} 61