Reference nvgArc

Creates new circle arc shaped sub-path. The arc center is at cx,cy, the arc radius is r, and the arc is drawn from angle a0 to a1, and swept in direction dir (NVG_CCW, or NVG_CW). Angles are specified in radians

procedure nvgArc(Ctx: PNVGcontext; CX, CY, R, A0, A1: Single; Dir: Integer);