数值微分DDA画线法、中点画线法、Bresenham画线法、中点画圆法、中点画椭圆法、递归种子填充算法、简单种子填充算法、Liang_Barsky裁剪算法、Suther_Land多边形

、扫描线种子填充算法-DDA line drawing numerical differentiation method, the dotted line method, Bresenham line drawing method, midpoint Circle France, were dotted ellipse method, recursive seed fill algorithm is simple seed filling algorithm, Liang_Barsky cutting algorithm, Suther_Land polygon、Scan line seed filling algorithm