1.Where I can download source of the A*(astar) in C++? 2.How I can build astar for 3d ?

Amit should have the info you need. And I remember his pages also had a pretty easy-to-understand C++ implementation, but now I didn't find it with a quick peek. Anyway, take a look at these pages:

http://www-cs-students.stanford.edu/~amitp/gameprog.html
http://theory.stanford.edu/~amitp/GameProgramming/

(EDITED to make URLs clickable)

[edited by - Timkin on February 23, 2004 7:24:15 PM]