...i recently saw a 3d glasses kinda movie,very stupid story and i expected so much from that glasses but i was so disapointed...and i was wondering is there any simple way to achive this with opengl...

back, left, right and front buffers. glSelectBuffer(), I believe, is what you''re looking for - not sure, though...

Modern 3D glasses are a bit complicated, but the standard red/green glasses are incredibly simple to use, you just need to render your scene to two buffers at slightly different angles(make them about as far apart as the distance between two eyes), one red and one green, and then blend them together. Then the blue lense of the glasses will show only the blue, and the red lense will show only the blue buffer, and each eye will see a different buffer that''s exactly what each eye would see in real life, and it looks 3D.