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Merge pull request #344 from Serrof/issue-335
add propagation direction in (Field)AdaptableInterval
2 parents 9bad1c2 + 0a18c06 commit c3e5d3a

27 files changed

+240
-59
lines changed

‎hipparchus-ode/src/changes/changes.xml

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@@ -54,6 +54,11 @@ If the output is not quite correct, check for invisible trailing spaces!
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</action>
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</release>
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<body>
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<release version="4.0" date="TBD" description="TBD">
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<action dev="serrof" type="add" issue="issues/335">
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Add boolean for propagation direction in (Field)AdaptableInterval.
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</action>
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</release>
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<release version="3.1" date="2024-04-05" description="This is a maintenance release. It includes one
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bugfixes and adds two features on existing integrators.">
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<action dev="serrof" type="add" issue="issues/269">

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/AbstractFieldODEDetector.java

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -114,7 +114,7 @@ public BracketedRealFieldUnivariateSolver<E> getSolver() {
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* @return a new detector with updated configuration (the instance is not changed)
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*/
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public T withMaxCheck(final E newMaxCheck) {
117-
return withMaxCheck(s -> newMaxCheck.getReal());
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return withMaxCheck((s, isForward) -> newMaxCheck.getReal());
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}
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/**

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/AbstractODEDetector.java

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -112,7 +112,7 @@ public BracketedUnivariateSolver<UnivariateFunction> getSolver() {
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* @return a new detector with updated configuration (the instance is not changed)
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*/
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public T withMaxCheck(final double newMaxCheck) {
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return withMaxCheck(s -> newMaxCheck);
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return withMaxCheck((s, isForward) -> newMaxCheck);
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}
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/**

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/AdaptableInterval.java

Lines changed: 6 additions & 3 deletions
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@@ -28,10 +28,13 @@
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@FunctionalInterface
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public interface AdaptableInterval {
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/** Get the current value of maximal time interval between events handler checks.
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* @param state current state
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/**
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* Get the current value of maximal time interval between events handler checks.
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*
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* @param state current state
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* @param isForward true if propagation is forward in independent variable, false otherwise
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* @return current value of maximal time interval between events handler checks
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*/
35-
double currentInterval(ODEStateAndDerivative state);
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double currentInterval(ODEStateAndDerivative state, boolean isForward);
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}

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/DetectorBasedEventState.java

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@@ -263,7 +263,7 @@ private ODEStateAndDerivative nextCheck(final ODEStateAndDerivative done, final
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// we have to select some intermediate state
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// attempting to split the remaining time in an integer number of checks
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final double dt = target.getTime() - done.getTime();
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final double maxCheck = detector.getMaxCheckInterval().currentInterval(done);
266+
final double maxCheck = detector.getMaxCheckInterval().currentInterval(done, dt >= 0.);
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final int n = FastMath.max(1, (int) FastMath.ceil(FastMath.abs(dt) / maxCheck));
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return n == 1 ? target : interpolator.getInterpolatedState(done.getTime() + dt / n);
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}

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/FieldAdaptableInterval.java

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -29,10 +29,13 @@
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@FunctionalInterface
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public interface FieldAdaptableInterval<T extends CalculusFieldElement<T>> {
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32-
/** Get the current value of maximal time interval between events handler checks.
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* @param state current state
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/**
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* Get the current value of maximal time interval between events handler checks.
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*
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* @param state current state
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* @param isForward true if propagation is forward in independent variable, false otherwise
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* @return current value of maximal time interval between events handler checks (only as a double)
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*/
36-
double currentInterval(FieldODEStateAndDerivative<T> state);
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double currentInterval(FieldODEStateAndDerivative<T> state, boolean isForward);
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}

‎hipparchus-ode/src/main/java/org/hipparchus/ode/events/FieldDetectorBasedEventState.java

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -279,7 +279,7 @@ private FieldODEStateAndDerivative<T> nextCheck(final FieldODEStateAndDerivative
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// we have to select some intermediate state
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// attempting to split the remaining time in an integer number of checks
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final T dt = target.getTime().subtract(done.getTime());
282-
final double maxCheck = detector.getMaxCheckInterval().currentInterval(done);
282+
final double maxCheck = detector.getMaxCheckInterval().currentInterval(done, dt.getReal() >= 0.);
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final int n = FastMath.max(1, (int) FastMath.ceil(dt.abs().divide(maxCheck).getReal()));
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return n == 1 ? target : interpolator.getInterpolatedState(done.getTime().add(dt.divide(n)));
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}

‎hipparchus-ode/src/test/java/org/hipparchus/ode/TestFieldProblem4.java

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -138,7 +138,7 @@ protected BaseDetector(final double maxCheck, final T threshold, final int maxIt
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}
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public FieldAdaptableInterval<T> getMaxCheckInterval() {
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return s -> maxCheck;
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return (s, isForward) -> maxCheck;
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}
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public int getMaxIterationCount() {

‎hipparchus-ode/src/test/java/org/hipparchus/ode/TestProblem4.java

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -113,7 +113,7 @@ protected BaseDetector(final double maxCheck, final double threshold, final int
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}
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115115
public AdaptableInterval getMaxCheckInterval() {
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return s -> maxCheck;
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return (s, isForward) -> maxCheck;
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}
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119119
public int getMaxIterationCount() {

‎hipparchus-ode/src/test/java/org/hipparchus/ode/events/CloseEventsTest.java

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2098,7 +2098,7 @@ private static abstract class BaseDetector implements ODEEventDetector {
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20992099
public BaseDetector(final double maxCheck, final double threshold, final int maxIter,
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Action action, List<Event> events) {
2101-
this.maxCheck = s -> maxCheck;
2101+
this.maxCheck = (s, isForward) -> maxCheck;
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this.maxIter = maxIter;
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this.solver = new BracketingNthOrderBrentSolver(0, threshold, 0, 5);
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this.action = action;
@@ -2382,7 +2382,7 @@ private class ResetChangesSignGenerator implements ODEEventDetector {
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public ResetChangesSignGenerator(final double y1, final double y2, final double change,
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final double maxCheck, final double threshold, final int maxIter) {
2385-
this.maxCheck = s -> maxCheck;
2385+
this.maxCheck = (s, isForward) -> maxCheck;
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this.maxIter = maxIter;
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this.solver = new BracketingNthOrderBrentSolver(0, threshold, 0, 5);
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this.y1 = y1;

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