Spline
Continuous curve passing through points. The tension parameter define the strength of each points over the curve. 0 mean it act like a line, 0.2 is the default value and render a smooth curve, value can be be as high as you want or even negative.

Examples
js
import { Spline } from "pencil.js";
const tension = 0.5;
const options = {
stroke: "red",
};
const spline = new Spline(from, [firstPoint, secondPoint, lastPoint], tension, options);SplineOptions
Inherit from LineOptions.
Spline has no specific options.
