Interpolates between p0 and p3, using a cubic spline with p1 and p2 as control points.
The first value to interpolate
The first control value for the curve.
The second control value for the curve.
The second value to interpolate
The interpolation step from 0..1
The interpolated value between p0 and p3
See Implementation
Interpolates between p0 and p3, using a cubic spline with p1 and p2 as control points.