On Tue, 16 Nov 2021 04:46:07 GMT, Jeremy <d...@openjdk.java.net> wrote:
>> This removes code that relied on consulting the Bezier control points to >> calculate the Rectangle2D bounding box. Instead it's pretty straight-forward >> to convert the Bezier control points into the x & y parametric equations. At >> their most complex these equations are cubic polynomials, so calculating >> their extrema is just a matter of applying the quadratic formula to >> calculate their extrema. (Or in path segments that are >> quadratic/linear/constant: we do even less work.) >> >> The bug writeup indicated they wanted Path2D#getBounds2D() to be more >> accurate/concise. They didn't explicitly say they wanted CubicCurve2D and >> QuadCurve2D to become more accurate too. But a preexisting unit test failed >> when Path2D#getBounds2D() was updated and those other classes weren't. At >> this point I considered either: >> A. Updating CubicCurve2D and QuadCurve2D to use the new more accurate >> getBounds2D() or >> B. Updating the unit test to forgive the discrepancy. >> >> I chose A. Which might technically be seen as scope creep, but it feels like >> a more holistic/better approach. >> >> Other shapes in java.awt.geom should not require updating, because they >> already identify concise bounds. >> >> This also includes a new unit test (in Path2D/UnitTest.java) that fails >> without the changes in this commit. > > Jeremy has updated the pull request incrementally with two additional commits > since the last revision: > > - 8176501: Method Shape.getBounds2D() incorrectly includes Bezier control > points in bounding box > > This is broadly addresses the code review feedback: "I see many duplicated > lines". This commit does NOT include "the previous unified solution" that is > also mentioned... so we'll try this on and see how we feel about it. > > https://github.com/openjdk/jdk/pull/6227#issuecomment-964020449 > - 8176501: Method Shape.getBounds2D() incorrectly includes Bezier control > points in bounding box > > Applying Laurent's implementation to address machine error. > > See https://github.com/openjdk/jdk/pull/6227#discussion_r749672090 OK, I refactored the accumulate methods so they're called twice (once for each dimension). What array allocation are you referring to? ------------- PR: https://git.openjdk.java.net/jdk/pull/6227
