[Development] Moving math3d classes from GUI to CORE

[Ville Voutilainen]

On Fri, 24 Jan 2020 at 12:19, Laszlo Agocs <laszlo.agocs at qt.io> wrote:
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> > So it looks like there is a need to have something like Eigen in Qt, at least for Qt 3D purposes (faster, better optimized classes, more complete API).
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> Not sure how that conclusion was drawn. More like the opposite. People who need something like Eigen can just use Eigen. There is no need to reinvent a half-baked alternative in QtCore. Whereas from Graphics (Quick, Quick3D, Qt3D) perspective this part of the discussion is irrelevant as the needs there are different, and those needs are better served by the existing gui/math3d, or, when it comes to 3rd party packages, glm (but definitely not Eigen).

I am unaware of previous discussions on this, but can you explain the
"definitely not" for Eigen?