The Graph2d makes use of Catmull-Rom spline interpolation.
The user can configure these per group, or globally. In this example we show all 4 possiblities. The differences are in the parametrization of
the curves. The options are

For both the

`uniform`

, `chordal`

and `centripetal`

. Alternatively you can disable the Catmull-Rom interpolation and
a linear interpolation will be used. The `centripetal`

parametrization produces the best result (no self intersection, yet follows the line closely) and is therefore the default setting.
For both the

`centripetal`

and `chordal`

parametrization, the distances between the points have to be calculated and this makes these methods computationally intensive
if there are very many points. The `uniform`

parametrization still has to do transformations, though it does not have to calculate the distance between point. Finally, the
linear interpolation is the fastest method. For more on the Catmull-Rom method, C. Yuksel et al. have an interesting paper titled ″On the parametrization of Catmull-Rom Curves″.