Gravity without a rigidbody script for whoever can use it

Here is line of code used in a flight script on a youtube tutorial to keep the Flying object from passing through the terrain. I changed the > (greater then ) to a < (less then) and in doing so I created a very simple gravity without a rigidbody script.

Code (JavaScript):

1. function Update () {
2.    
3.      terrainHeightWhereWeAre = Terrain.activeTerrain.SampleHeight( transform.position );
4.        
5.         if (terrainHeightWhereWeAre < transform.position.y)
6.             transform.position = new Vector3(transform.position.x,
7.                                              terrainHeightWhereWeAre,
8.                                              transform.position.z);
9.        
10.    
11. }

 

Well, that's not "gravity" so much as "lock you onto the ground".