ApproximateEllipse creates a polygon that approximates an ellipse.

ApproximateEllipseAuto creates a polygon that approximates an ellipse, automatically choose the number of segments to break the ellipse contour into.

CalcEllipseSegmentCount returns a suggested number of segments to use when generating an ellipse.

Rect creates a new polygon in the shape of a rectangle.

Contour is a sequence of vertices connected by line segments, forming a closed shape.

Polygon holds one or more contour lines.