Did you modify it to have true b-spline math? Since answer starts with "Implementing B-Spline is quite a bit beyond my maths capabilities but a simple 'ease' is certainly feasible.". In other words, that's ease math and map range has ease already. What is missing is true b-spline.
2 Comments
Two point?
You could use something like this:
based on:
blender.stackexchange.com/questions/118022/what-is-the-math-for-the-b-spline-interpolation-of-a-color-ramp-with-two-color-s
Did you modify it to have true b-spline math? Since answer starts with "Implementing B-Spline is quite a bit beyond my maths capabilities but a simple 'ease' is certainly feasible.". In other words, that's ease math and map range has ease already. What is missing is true b-spline.