While it is perfectly alright to code a 3D environment as a long series of numbers, it becomes increasingly hard as the complexity of the environment goes up. For this reason, we must catagorize our data into a more workable fashion. At the top of ou

自由查看立方体： 1．绘制立方体 2．第一视角自由查看立方体 3．立方体的消隐 4．界外图形的删除 -Free to view the cube: 1. Drawing cube 2. The first free to view the cube 3 perspective. 4 blanking cube. Delete graphics sector

图形学的经典算法之一，扫描线种子填充算法，填充种子点所在扫描线上的位于给定区域的一个区段，然后确定与这一区段相连通的上、下两条扫描线上位于给定区域内的区段，确定新种子点，并依次保存下来。-One of the classic graphics algorithms, scan line seed fill algorithm, filling the seed point is located where the scan line to a given area of ​ ̴