[pstricks] Why is A1 specially treated?

[Counter Terrorist]

Dear folks,

I am really confused with the following macro.

\pstOIJGeonode[](x1, y1){A1}{O}{I}{J}(x2,y2){A2}. . . (xn, yn){An}


Why is the first point specially treated? I means that it must come before O, I, J while other points come after O, I, J?

I really dislike this syntax because it does consume our memory to remember such unnecessary things.
If it is possible, I am so sorry, please avoid making syntax with no logical clues.

Adding such abnormal syntax will burden the users. 

Thank you in advance.


best regards,

http://tex.stackexchange.com/users/19356
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