vec_set(ground_vec,vector(my.x,my.y,my.z + my.min_z));
vec_set(target,vector(my.x,my.y,my.z - 5000));
my.z -= c_trace(ground_vec,target, IGNORE_ME | IGNORE_PASSABLE) -1;
my.tilt = -asin(normal.x);
my.roll = -asin(normal.y);

thats what ended up working for me, based off of your post, thanks for the help.