Translations:B-Splines/118/en

Mathematically this is achieved by defining the different $$N_{i,n}$$ pieces at different intervals. If for example a B-spline is defined for the interval [0, 1], it is uniform if all its e.g. 5 pieces are also defined in this interval. If now $$N_{1,4}$$ is only defined in the interval [0, 0.6] (outside the interval it is set to zero), it is shorter and thus the spline becomes non-uniform.