B-Splines for VTK

This is the conclusion of yet another of my long-delayed projects. I started writing some classes for doing image resampling with B-splines in VTK way back in 2007. After working on them for a while, I realized that even after I finished them, I would have to do a lot of testing before I could safely use them. Recently I was reading up on B-splines again, and happened to come across some code from the authors of one of the important B-spline papers. That gave me enough incentive to go back to my old code and finish it off. See a short paper that I wrote here.