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Posted to commits@commons.apache.org by lu...@apache.org on 2015/11/15 10:33:24 UTC
[math] Initialize primary and secondary equations at integration
start.
Repository: commons-math
Updated Branches:
refs/heads/field-ode e55d38c43 -> 0820cd68d
Initialize primary and secondary equations at integration start.
Project: http://git-wip-us.apache.org/repos/asf/commons-math/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-math/commit/0820cd68
Tree: http://git-wip-us.apache.org/repos/asf/commons-math/tree/0820cd68
Diff: http://git-wip-us.apache.org/repos/asf/commons-math/diff/0820cd68
Branch: refs/heads/field-ode
Commit: 0820cd68d3621754de68e4e964dfdc52383b1162
Parents: e55d38c
Author: Luc Maisonobe <lu...@apache.org>
Authored: Sun Nov 15 10:33:11 2015 +0100
Committer: Luc Maisonobe <lu...@apache.org>
Committed: Sun Nov 15 10:33:11 2015 +0100
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.../commons/math3/ode/FieldExpandableODE.java | 24 +++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/commons-math/blob/0820cd68/src/main/java/org/apache/commons/math3/ode/FieldExpandableODE.java
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diff --git a/src/main/java/org/apache/commons/math3/ode/FieldExpandableODE.java b/src/main/java/org/apache/commons/math3/ode/FieldExpandableODE.java
index 341b1c7..91dc81e 100644
--- a/src/main/java/org/apache/commons/math3/ode/FieldExpandableODE.java
+++ b/src/main/java/org/apache/commons/math3/ode/FieldExpandableODE.java
@@ -79,7 +79,7 @@ public class FieldExpandableODE<T extends RealFieldElement<T>> {
/** Get the mapper for the set of equations.
* @return mapper for the set of equations
*/
- FieldEquationsMapper<T> getMapper() {
+ public FieldEquationsMapper<T> getMapper() {
return mapper;
}
@@ -98,6 +98,28 @@ public class FieldExpandableODE<T extends RealFieldElement<T>> {
}
+ /** Initialize equations at the start of an ODE integration.
+ * @param t0 value of the independent <I>time</I> variable at integration start
+ * @param y0 array containing the value of the state vector at integration start
+ * @param finalTime target time for the integration
+ * @exception MaxCountExceededException if the number of functions evaluations is exceeded
+ * @exception DimensionMismatchException if arrays dimensions do not match equations settings
+ */
+ public void init(final T t0, final T[] y0, final T finalTime) {
+
+ // initialize primary equations
+ int index = 0;
+ final T[] primary0 = mapper.extractEquationData(index, y0);
+ primary.init(t0, primary0, finalTime);
+
+ // initialize secondary equations
+ while (++index < mapper.getNumberOfEquations()) {
+ final T[] secondary0 = mapper.extractEquationData(index, y0);
+ components.get(index - 1).init(t0, primary0, secondary0, finalTime);
+ }
+
+ }
+
/** Get the current time derivative of the complete state vector.
* @param t current value of the independent <I>time</I> variable
* @param y array containing the current value of the complete state vector