either "open" or "closed."
coordinate to start drawing the arc
coordinate to finish drawing the arc
Optional
width,: Vec2width and height of the ellipse to draw the arc along
angle in degrees to rotate ellipse about its center
0 to draw shorter of 2 arcs, 1 to draw longer
0 to rotate CCW, 1 to rotate CW
Path data for an arc
Return series of elements that can render an arc SVG.