On Tue, 9 Nov 2021 10:34:11 GMT, Laurent Bourgès <lbour...@openjdk.org> wrote:

>> Jeremy has updated the pull request incrementally with one additional commit 
>> since the last revision:
>> 
>>   8176501: Method Shape.getBounds2D() incorrectly includes Bezier control 
>> points in bounding box
>>   
>>   Addressing code review recommendation to calculate polynomial coefficients 
>> using differences / vector notation.
>>   
>>   https://github.com/openjdk/jdk/pull/6227#discussion_r743534560
>>   
>>   I generally understand the intention of this change, but I don't know 
>> exactly how to test/evaluate it.
>>   
>>   The unit tests still pass. I ran some sample calculations involving a 
>> 100x100 Ellipse2D as it was rotated, and the two getBounds2D(..) 
>> implementations (before and after this commit) only differed by a few ulps 
>> (usually around 10^-15), as expected.
>
> Great !
> I see many duplicated lines, probably it is time to add 2 small methods to 
> processCubic() and processQuad() that can be called on x and y equations => 
> only 2 arrays needed for coeff and deriv_coeff. 
> Maybe I prefer the previous unified solution relying on 
> QuadCurve2D.solveQuadratic() that handles both case.

@bourgesl : I refactored things just now to address the "many duplicated lines" 
comment. At your convenience please me know if the current branch looks/feels 
better, or if you have other recommendations in mind.

-------------

PR: https://git.openjdk.java.net/jdk/pull/6227

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