JavaScript port of the Bezier tookit used by https://play.google.com/store/apps/details?id=com.grayswindle.sketchadoodle
For more information, see this paper: Grolaux, D., Vanderdonckt, J., Nguyen, T.D., Khaddam, I. (2020). SketchADoodle: Engineering Touch-surface Multi-stroke Gestures by Bézier Curves. ACM Transactions on Human-Computer Interaction (TOCHI). ACM. DOI: