### Description
The vtkKochanekSpline provides three parametes to control the shape of the spline:

1. tension - Changes the length of the tangent vector      
2. bias - Primarily changes the direction of the tangent vector
3. continuity - Changes the sharpness in change between tangents

!!! seealso
    [KochanekSplineDemo](/Cxx/PolyData/KochanekSplineDemo) provides sliders to change the three parameters.

!!! seealso
    This [wikipedia article](https://en.wikipedia.org/wiki/Kochanek%E2%80%93Bartels_spline) describes the controlsin detail.
