Fast anti-aliased circle generation

This chapter discusses the fast anti-aliased circle generation. This gem proposes an elegant technique to render anti-aliased circles with even less number of operations than Bresenham's incremental circle algorithm. The success is credited to a simple two-point anti-aliasing scheme and the use of a table of size max, where √2/4 Rmax is the maximum circle radius allowed by the new algorithm. Due to the eight-way symmetry of the circle, it …