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Posted to issues@commons.apache.org by "Matt Juntunen (JIRA)" <ji...@apache.org> on 2019/02/14 05:11:00 UTC

[jira] [Created] (NUMBERS-94) PlaneAngle normalize fails for very small numbers.

Matt Juntunen created NUMBERS-94:
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             Summary: PlaneAngle normalize fails for very small numbers.
                 Key: NUMBERS-94
                 URL: https://issues.apache.org/jira/browse/NUMBERS-94
             Project: Commons Numbers
          Issue Type: Bug
            Reporter: Matt Juntunen


When the {{PlaneAngle.normalize()}} method is called to normalize between 0 and 1 turns and is passed a very small number compared to the 1, then the method returns a number exactly equal to the angle upper bound. This breaks the API contract since the return value must be strictly less than the upper bound. Ex:
{code:java}
PlaneAngle angle = PlaneAngle.ofTurns(-1e-18);
double normalized = angle.normalize(PlaneAngle.PI).toTurns();
// normalized is equal to 1 but it should be 0 since 1 - 1e-18 = 1, which is equivalent to 0 in turns)
{code}



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