On Aug 31, 2010, at 2:06 PM, Chris Marrin wrote: > > On Aug 31, 2010, at 11:48 AM, Kenneth Russell wrote: > >> On Tue, Aug 31, 2010 at 11:05 AM, David Hyatt <hy...@apple.com> wrote: >>> On Aug 31, 2010, at 10:36 AM, Chris Marrin wrote: >>> >>>> Or should we get rid of Vector3, added the functionality it needs to >>>> FloatPoint3D and use that? Ken Russell already has plans to do add the >>>> functions to FloatPoint3D, so I would vote for that. >>> >>> I would vote for this. I don't think the geometry classes should move to >>> wtf. >> >> I'd like to unify the math, geometry, and linear algebra classes that >> are scattered around the WebKit tree -- for example, FloatPoint, >> FloatPoint3D, FloatRect, FloatSize, the classes under >> WebCore/platform/graphics/transforms/, these Complex and Vector3 >> types, ... -- under a directory like WebCore/math, remove duplicate >> functionality, and provide a cohesive set of interfaces that can be >> easily used by other modules like graphics and audio. > > It would be nice if we could do this unification and then later on we can > enhance it so the classes play nice together. For instance, > TransformationMatrix deals with many, but not all of the other geometric > classes. You can't cast between FloatPoint and FloatPoint3D, etc. Maybe we > could also use this opportunity to change TransformationMatrix to Matrix. The > current name is such a mouthful. And we might also want to think about > changing FloatPoint3D to FloatPoint3. That would make it more natural if and > when we want to add a FloatPoint4. We should also change AffineTransform to > AffineMatrix so it matches Matrix.
Mathematically, you can have an affine transform, or a matrix that represents an affine transform. And there's such a thing as an affine space (in fact IntPoint and IntSize form an affine space). But there's no such thing as an affine matrix. Regards, Maciej _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
