Simplest one

var head_vector[3];
function camera_function
{
while(player != 0)
{
vec_for_vertex(head_vector,player,150); //150 is nr of vertex top of the head
vec_set(camera.x,head_vector.x); //place camera allways at this vertex position
camera.pan = player.pan;
camera.tilt = player.tilt;
camera.roll = player.roll;
wait(1);
}
}