二维无网格计算程序，包含几种常见的无网格法。-2D grid, contains several common-grid method.

同样是无网格法书籍后面的代码，第七章程序：面向对象的二维无网格法程序OM-The same is no law books behind the grid code, Chapter VII of the program: an object-oriented program OMLL dimensional meshless method