terrain getSteepness: what's that returned value?

Hello again,

i've been just playing around with terrain.
What i would like to do, is to check if the steepness of the terrain is to high to place a Building.

My returned Value doesn't make sense (to me).
So sometimes when my mouse position is on a slope i get a lower value then on flat Grounds.

My Script is this:

Code (CSharp):

1.  
2. mousePos = MainGame.GetMousePosition ();
3. mousePos.Normalize ();
4. Debug.Log ("Steepness: " + world.GetSteepness (mousePos.x, mousePos.y));

on GetMousePosition i use this code:

Code (CSharp):

1. public static Vector3 GetMousePosition() {
2.         RaycastHit hit;
3.         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
4.         if(Physics.Raycast (ray, out hit, 500)) {
5.             Vector3 hitPoint = hit.point;
6.             return hitPoint;
7.         }
8.         return Vector3.zero;
9.     }

Is my code the problem, or am i just understand getSteepness wrong?
Couldn't find much info on this on google, thanks in advance.

 

Dont normalise the mouse position

 

Thank you, but steepness equals 0 if i don't normalise.
I really don't get this.

EDIT:
I have a different way to do my task, i just check for the hit.normal and look for the .y-rotation.

Here's my code, maybe it can help someone else.

Code (CSharp):

1. public static Vector3 GetAngle() {
2.         RaycastHit hit;
3.         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
4.         if(Physics.Raycast (ray, out hit, 500)) {
5.             Vector3 hitPoint = hit.normal;
6.             return hitPoint;
7.         }
8.         return Vector3.zero;
9.     }