关于parval

对parval()，属性指向很困扰
$ {: z' `" n+ M/ ^  @& D- V比如： baynumber = parval(2)，求注解下，为什么是（2），
0 U0 k7 v' i  q2 i% h) r, D. v
如果levelnuber=?????  求注解。。。。
For developer use. This command is used inside a function that is called by the nodefunction() command. It returns the parameter passed to nodefunction specified by index as a number. The first additional parameter passed to nodefunction() is parameter 1, the second is parameter 2, etc. Parameters can also be retrieved using parnode() and parstr() for casting them as a treenode and string respectively.
Example: double passedval = parval(3);

( J5 ]4 b5 U9 W4 A6 G: h: M# VThis sets passedval equal to the number that was passed to nodefunction() as parameter 3.

函数解释很详细哦他应该就是个传递参数吧