ok thx Airo,

extending the oliver docs in the links olii sent above, in one of the tutorials, he had checked the closest point to the plane in which it was hard coded as the floor. that was in the CUBE totorial.

i had an idea to modify that function so it can check the closest point to the plane inwhich it collided with. and there for that will solve my problem, anybody has an idea how to calculate the closest point to the collided plane?