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.jacobians; 19dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 20dee0849a9704d532af0b550146cbafbaa6ee1d19Raymondimport org.apache.commons.math.ode.events.EventException; 21dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 22dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond/** This interface represents a handler for discrete events triggered 23dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * during ODE integration. 24dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 25dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>Some events can be triggered at discrete times as an ODE problem 26dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * is solved. This occurs for example when the integration process 27dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * should be stopped as some state is reached (G-stop facility) when the 28dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * precise date is unknown a priori, or when the derivatives have 29dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * discontinuities, or simply when the user wants to monitor some 30dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * states boundaries crossings. 31dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * </p> 32dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 33dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>These events are defined as occurring when a <code>g</code> 34dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * switching function sign changes.</p> 35dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 36dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>Since events are only problem-dependent and are triggered by the 37dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * independent <i>time</i> variable and the state vector, they can 38dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * occur at virtually any time, unknown in advance. The integrators will 39dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * take care to avoid sign changes inside the steps, they will reduce 40dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the step size when such an event is detected in order to put this 41dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * event exactly at the end of the current step. This guarantees that 42dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * step interpolation (which always has a one step scope) is relevant 43dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * even in presence of discontinuities. This is independent from the 44dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * stepsize control provided by integrators that monitor the local 45dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * error (this event handling feature is available for all integrators, 46dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * including fixed step ones).</p> 47dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 48dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>Note that is is possible to register a {@link 49dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.events.EventHandler classical event handler} 50dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * in the low level integrator used to build a {@link FirstOrderIntegratorWithJacobians} 51dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * rather than implementing this class. The event handlers registered at low level 52dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * will see the big compound state whether the event handlers defined by this interface 53dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * see the original state, and its jacobians in separate arrays.</p> 54dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 55dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>The compound state is guaranteed to contain the original state in the first 56dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * elements, followed by the jacobian with respect to initial state (in row order), 57dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * followed by the jacobian with respect to parameters (in row order). If for example 58dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the original state dimension is 6 and there are 3 parameters, the compound state will 59dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * be a 60 elements array. The first 6 elements will be the original state, the next 36 60dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * elements will be the jacobian with respect to initial state, and the remaining 18 elements 61dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * will be the jacobian with respect to parameters.</p> 62dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 63dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>Dealing with low level event handlers is cumbersome if one really needs the jacobians 64dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * in these methods, but it also prevents many data being copied back and forth between 65dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * state and jacobians on one side and compound state on the other side. So for performance 66dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * reasons, it is recommended to use this interface <em>only</em> if jacobians are really 67dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * needed and to use lower level handlers if only state is needed.</p> 68dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * 69dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @version $Revision: 1037341 $ $Date: 2010-11-20 22:58:35 +0100 (sam. 20 nov. 2010) $ 70dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @since 2.1 71dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @deprecated as of 2.2 the complete package is deprecated, it will be replaced 72dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * in 3.0 by a completely rewritten implementation 73dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 74dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond@Deprecated 75dee0849a9704d532af0b550146cbafbaa6ee1d19Raymondpublic interface EventHandlerWithJacobians { 76dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 77dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Stop indicator. 78dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This value should be used as the return value of the {@link 79dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #eventOccurred eventOccurred} method when the integration should be 80dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * stopped after the event ending the current step.</p> 81dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 82dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond int STOP = 0; 83dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 84dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Reset state indicator. 85dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This value should be used as the return value of the {@link 86dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #eventOccurred eventOccurred} method when the integration should 87dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * go on after the event ending the current step, with a new state 88dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * vector (which will be retrieved thanks to the {@link #resetState 89dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * resetState} method).</p> 90dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 91dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond int RESET_STATE = 1; 92dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 93dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Reset derivatives indicator. 94dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This value should be used as the return value of the {@link 95dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #eventOccurred eventOccurred} method when the integration should 96dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * go on after the event ending the current step, with a new derivatives 97dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * vector (which will be retrieved thanks to the {@link 98dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.FirstOrderDifferentialEquations#computeDerivatives} 99dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * method).</p> 100dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 101dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond int RESET_DERIVATIVES = 2; 102dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 103dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Continue indicator. 104dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This value should be used as the return value of the {@link 105dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #eventOccurred eventOccurred} method when the integration should go 106dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * on after the event ending the current step.</p> 107dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 108dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond int CONTINUE = 3; 109dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 110dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Compute the value of the switching function. 111dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 112dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>The discrete events are generated when the sign of this 113dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * switching function changes. The integrator will take care to change 114dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the stepsize in such a way these events occur exactly at step boundaries. 115dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * The switching function must be continuous in its roots neighborhood 116dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * (but not necessarily smooth), as the integrator will need to find its 117dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * roots to locate precisely the events.</p> 118dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 119dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param t current value of the independent <i>time</i> variable 120dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param y array containing the current value of the state vector 121dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydy0 array containing the current value of the jacobian of 122dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to initial state 123dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydp array containing the current value of the jacobian of 124dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to parameters 125dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @return value of the g switching function 126dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @exception EventException if the switching function cannot be evaluated 127dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 128dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond double g(double t, double[] y, double[][] dydy0, double[][] dydp) 129dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond throws EventException; 130dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 131dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Handle an event and choose what to do next. 132dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 133dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This method is called when the integrator has accepted a step 134dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * ending exactly on a sign change of the function, just <em>before</em> 135dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the step handler itself is called (see below for scheduling). It 136dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * allows the user to update his internal data to acknowledge the fact 137dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the event has been handled (for example setting a flag in the {@link 138dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.jacobians.ODEWithJacobians 139dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * differential equations} to switch the derivatives computation in 140dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * case of discontinuity), or to direct the integrator to either stop 141dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * or continue integration, possibly with a reset state or derivatives.</p> 142dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 143dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <ul> 144dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <li>if {@link #STOP} is returned, the step handler will be called 145dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * with the <code>isLast</code> flag of the {@link 146dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.jacobians.StepHandlerWithJacobians#handleStep( 147dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * StepInterpolatorWithJacobians, boolean) handleStep} method set to true and 148dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the integration will be stopped,</li> 149dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <li>if {@link #RESET_STATE} is returned, the {@link #resetState 150dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * resetState} method will be called once the step handler has 151dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * finished its task, and the integrator will also recompute the 152dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * derivatives,</li> 153dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <li>if {@link #RESET_DERIVATIVES} is returned, the integrator 154dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * will recompute the derivatives, 155dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <li>if {@link #CONTINUE} is returned, no specific action will 156dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * be taken (apart from having called this method) and integration 157dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * will continue.</li> 158dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * </ul> 159dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 160dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>The scheduling between this method and the {@link 161dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.jacobians.StepHandlerWithJacobians 162dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * StepHandlerWithJacobians} method {@link 163dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.jacobians.StepHandlerWithJacobians#handleStep( 164dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * StepInterpolatorWithJacobians, boolean) handleStep(interpolator, isLast)} 165dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * is to call this method first and <code>handleStep</code> afterwards. This 166dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * scheduling allows the integrator to pass <code>true</code> as the 167dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <code>isLast</code> parameter to the step handler to make it aware the step 168dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * will be the last one if this method returns {@link #STOP}. As the 169dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * interpolator may be used to navigate back throughout the last step (as {@link 170dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.sampling.StepNormalizer StepNormalizer} 171dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * does for example), user code called by this method and user 172dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * code called by step handlers may experience apparently out of order values 173dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * of the independent time variable. As an example, if the same user object 174dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * implements both this {@link EventHandlerWithJacobians EventHandler} interface and the 175dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * {@link org.apache.commons.math.ode.sampling.FixedStepHandler FixedStepHandler} 176dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * interface, a <em>forward</em> integration may call its 177dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <code>eventOccurred</code> method with t = 10 first and call its 178dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <code>handleStep</code> method with t = 9 afterwards. Such out of order 179dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * calls are limited to the size of the integration step for {@link 180dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.sampling.StepHandler variable step handlers} and 181dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * to the size of the fixed step for {@link 182dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * org.apache.commons.math.ode.sampling.FixedStepHandler fixed step handlers}.</p> 183dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 184dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param t current value of the independent <i>time</i> variable 185dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param y array containing the current value of the state vector 186dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydy0 array containing the current value of the jacobian of 187dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to initial state 188dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydp array containing the current value of the jacobian of 189dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to parameters 190dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param increasing if true, the value of the switching function increases 191dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * when times increases around event (note that increase is measured with respect 192dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * to physical time, not with respect to integration which may go backward in time) 193dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @return indication of what the integrator should do next, this 194dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * value must be one of {@link #STOP}, {@link #RESET_STATE}, 195dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * {@link #RESET_DERIVATIVES} or {@link #CONTINUE} 196dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @exception EventException if the event occurrence triggers an error 197dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 198dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond int eventOccurred(double t, double[] y, double[][] dydy0, double[][] dydp, 199dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond boolean increasing) throws EventException; 200dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 201dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond /** Reset the state prior to continue the integration. 202dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 203dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * <p>This method is called after the step handler has returned and 204dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * before the next step is started, but only when {@link 205dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #eventOccurred} has itself returned the {@link #RESET_STATE} 206dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * indicator. It allows the user to reset the state vector for the 207dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * next step, without perturbing the step handler of the finishing 208dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * step. If the {@link #eventOccurred} never returns the {@link 209dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * #RESET_STATE} indicator, this function will never be called, and it is 210dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * safe to leave its body empty.</p> 211dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 212dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param t current value of the independent <i>time</i> variable 213dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param y array containing the current value of the state vector 214dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the new state should be put in the same array 215dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydy0 array containing the current value of the jacobian of 216dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to initial state, the new jacobian 217dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * should be put in the same array 218dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @param dydp array containing the current value of the jacobian of 219dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * the state vector with respect to parameters, the new jacobian 220dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * should be put in the same array 221dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond * @exception EventException if the state cannot be reseted 222dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond */ 223dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond void resetState(double t, double[] y, double[][] dydy0, double[][] dydp) 224dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond throws EventException; 225dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond 226dee0849a9704d532af0b550146cbafbaa6ee1d19Raymond} 227