[jira] [Created] (GEOMETRY-90) Slerp Wrapper

["Matt Juntunen (Jira)" <ji...@apache.org>]

Matt Juntunen created GEOMETRY-90:
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             Summary: Slerp Wrapper
                 Key: GEOMETRY-90
                 URL: https://issues.apache.org/jira/browse/GEOMETRY-90
             Project: Apache Commons Geometry
          Issue Type: Improvement
            Reporter: Matt Juntunen


The current API for performing slerp operations with {{QuaternionRotation}} instances is somewhat cumbersome. The {{QuaternionRotation.slerp}} method returns an instance of {{org.apache.commons.numbers.quaternion.Slerp}}, which cannot be directly used with any of the other classes in commons-geometry. The use cases therefore end up looking like this:

{code:java}
QuaterionRotation start = ...;
QuaternionRotation end = ...;

Slerp s = start.slerp(end);

Quaternion midQuat = s.apply(0.5); // commons-numbers objects
QuaterionRotation mid = QuaternionRotation.of(midQuat); // convert to commons-geometry object
{code}

I propose that the {{QuaternionRotation.slerp}} method return a small wrapper class (perhaps named {{SlerpFunction}} to avoid a name collision with {{Slerp}}) that makes this more convenient.

{code:java}
QuaterionRotation start = ...;
QuaternionRotation end = ...;

SlerpFunction s = start.slerp(end);

QuaterionRotation mid = s.apply(0.5); // no conversions needed
{code}




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