Introduction - If you have any usage issues, please Google them yourself
This code contains a demonstration of the following algorithm:
Direct Line: DDA algorithm to generate a straight line, the midpoint algorithm to generate a straight line, Bresenham algorithm to generate a straight line.
Round: the mid-point circle, Bresenham s circle.
Oval: in dotted ellipse.
The area filling: polygon scan line filling, seed scan line filling.