A special subclass of PIXI.Container used to represent a Drawing in the PrimaryCanvasGroup.
Draw rectangular shapes.
Draw ellipsoid shapes.
Draw polygonal shapes.
Draw freehand shapes with bezier spline smoothing.
Attribution: The equations for how to calculate the bezier control points are derived from Rob Spencer's article: http://scaledinnovation.com/analytics/splines/aboutSplines.html
The smoothing factor
The prior point
The current point
The next point
The bezier control points
Sorting values to deal with ties.