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| <h2 title="Interface FixedStepHandler" class="title">Interface FixedStepHandler</h2> |
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| <pre>public interface <span class="strong">FixedStepHandler</span></pre> |
| <div class="block">This interface represents a handler that should be called after |
| each successful fixed step. |
| |
| <p>This interface should be implemented by anyone who is interested |
| in getting the solution of an ordinary differential equation at |
| fixed time steps. Objects implementing this interface should be |
| wrapped within an instance of <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>StepNormalizer</code></a> that itself |
| is used as the general <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepHandler.html" title="interface in org.apache.commons.math3.ode.sampling"><code>StepHandler</code></a> by the integrator. The |
| <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>StepNormalizer</code></a> object is called according to the integrator |
| internal algorithms and it calls objects implementing this |
| interface as necessary at fixed time steps.</p></div> |
| <dl><dt><span class="strong">Since:</span></dt> |
| <dd>1.2</dd> |
| <dt><span class="strong">Version:</span></dt> |
| <dd>$Id: FixedStepHandler.java 1416643 2012-12-03 19:37:14Z tn $</dd> |
| <dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../org/apache/commons/math3/ode/sampling/StepHandler.html" title="interface in org.apache.commons.math3.ode.sampling"><code>StepHandler</code></a>, |
| <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>StepNormalizer</code></a></dd></dl> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/ode/sampling/FixedStepHandler.html#handleStep(double, double[], double[], boolean)">handleStep</a></strong>(double t, |
| double[] y, |
| double[] yDot, |
| boolean isLast)</code> |
| <div class="block">Handle the last accepted step</div> |
| </td> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/ode/sampling/FixedStepHandler.html#init(double, double[], double)">init</a></strong>(double t0, |
| double[] y0, |
| double t)</code> |
| <div class="block">Initialize step handler at the start of an ODE integration.</div> |
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| <h4>init</h4> |
| <pre>void init(double t0, |
| double[] y0, |
| double t)</pre> |
| <div class="block">Initialize step handler at the start of an ODE integration. |
| <p> |
| This method is called once at the start of the integration. It |
| may be used by the step handler to initialize some internal data |
| if needed. |
| </p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>t0</code> - start value of the independent <i>time</i> variable</dd><dd><code>y0</code> - array containing the start value of the state vector</dd><dd><code>t</code> - target time for the integration</dd></dl> |
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| <h4>handleStep</h4> |
| <pre>void handleStep(double t, |
| double[] y, |
| double[] yDot, |
| boolean isLast)</pre> |
| <div class="block">Handle the last accepted step</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>t</code> - time of the current step</dd><dd><code>y</code> - state vector at t. For efficiency purposes, the <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>StepNormalizer</code></a> class reuses the same array on each call, so if |
| the instance wants to keep it across all calls (for example to |
| provide at the end of the integration a complete array of all |
| steps), it should build a local copy store this copy.</dd><dd><code>yDot</code> - derivatives of the state vector state vector at t. |
| For efficiency purposes, the <a href="../../../../../../org/apache/commons/math3/ode/sampling/StepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>StepNormalizer</code></a> class reuses |
| the same array on each call, so if |
| the instance wants to keep it across all calls (for example to |
| provide at the end of the integration a complete array of all |
| steps), it should build a local copy store this copy.</dd><dd><code>isLast</code> - true if the step is the last one</dd></dl> |
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