Algorithm behind 2d Blend Spaces programming?

I’ve examined a little bit the source code around the AnimGraph and esp. Blend Space 2d. And I think that for 2d blend space the code uses Delaunay triangulation with barycentric interpolation.

Has anyone had some experience with that and can shed some light into the subject and open our eyes?

from Blend Spaces in Unreal Engine | Unreal Engine 5.6 Documentation | Epic Developer Community