How do I control the weight of the Center point in Beizer Curve?

Maybe distance() between the offset point and the average of the two end points.

That won't work to get negative values however. I think the image is based on a cartesian graph with the zero points in the middle rather than top left.

With weight to 0 the line is basically a lerp from point A > C ...

With weight 1. It's the regular qarp.

With weight 0.5, it's the average between the lerp and the qarp.

I could make a mix between a lerp and a quarp. Maybe a sin/cos can be used to control the influence of the qarp along the curve.

If there's no y component you can just add a drag and drop sprite and use its x.

That will work as a "weight" of a sort.

I tried something: 1drv.ms/u/s!Ap-ffJJPoln1iH-HrUqbCRS3PbHO