Great article, and I've been applying this recently in a few unrelated projects. Of note, research on the internet produces some surprising red herrings that ma

Great article, and I've been applying this recently in a few unrelated projects. Of note, research on the internet produces some surprising red herrings that make this seem more complicated than it is. This article's approach, by contrast, is nice and apt. Spline? Lagrange polynomials? Newton polynomials? etc. This gets especially messy when looking for interpolation in 2 and 3D. I came to the same conclusion as the article: The answer is to solve a system of linear equations with 4 unknowns.