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https://issues.apache.org/jira/browse/GEOMETRY-10?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Juntunen closed GEOMETRY-10.
---------------------------------
Resolution: Done
> Reuse Normalized Vectors
> ------------------------
>
> Key: GEOMETRY-10
> URL: https://issues.apache.org/jira/browse/GEOMETRY-10
> Project: Apache Commons Geometry
> Issue Type: Improvement
> Reporter: Matt Juntunen
> Priority: Minor
>
> The Vector.normalize() method is used quite frequently. We currently always
> return a new instance with each method call, but we should be able to reuse
> the current instance if it is already normalized.
> Ex:
> {code:java}
> public Vector3D normalize() {
> final double normSq = getNormSq();
> if (normSq == 1.0) {
> return this;
> }
> else if (normSq == 0.0) {
> throw new IllegalStateException(ZERO_NORM_MSG);
> }
> return scalarMultiply(1 / Math.sqrt(normSq);
> }{code}
> We'll need to verify that this won't introduce any floating point accuracy
> issues.
>
> Pull request: https://github.com/apache/commons-geometry/pull/10
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