This has nothing to do with "please google shit for me" requests. I'll try to explain better.
We have two entities that are located in the level - entity START and entity END. I need some advice about how to make the camera moves between these entities something like
Code:
if(camera.y < entityEND.y)
{
	camera.y += 10 * time_step;
}

OK, this can work if camera.z and entityEND.z have the same height cordinates. If entityEND is above entitySTART (from where camera start) then I do not know how make this. I tried with vec_diff, but I do not know how move together camera.y and camera.z to hit entityEND. With path this is easy but i need solution without path.