snake算法源代码。Notes : This snake implementation is based on a doubly linked list * with SnakePoints for nodes. This list knows how to slither * (i.e. minimize the snake energy by moving points), draw * itself using OpenGL, and return useful

一个双向链表的在0pengl中可以被广泛运用，赋予的形的含义.-A doubly linked list in 0pengl can be widely used, the meaning given shape.