Checking the angle of an object?

I am writing a script that creates a gameobject at the location of the mouse, but I would like to destroy it if it not on level ground (so the player can't place things on trees or walls, etc.) So, this is the code that I came up with to check if the prefab is level and if it is not, it is destroyed. Will this work (is this the correct way to use Quaterion.Euler)? Is there a better way to do this?

Code (CSharp):

1. if (Quaterion.Euler.x != 0 || Quaterion.Euler.z != 0)
2. {Destroy(prefab)}
3. else
4. {prefab = storedprefab}

 

It is not.

You will need to get the normal of whatever surface you're placing the object on, and then compare that normal to the normal of the world (Vector3.up) using Vector3.Dot. If the two vectors are above some threshold (0.99 or whatever), then you are able to place it. Otherwise, don't allow the placement.

 

Thanks.

Would it look like this?

Code (CSharp):

1. RaycastHit hit;
2. Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
3. Vector3 SurfaceNormal;
4.  
5. if (Physics.Raycast(ray, out hit))
6. {SurfaceNormal = hit.normal;}
7.  
8. if (Vector3.Dot(SurfaceNormal, Vector3.up) != 1)
9. {Destroy(prefab)}
10. else
11. {prefab = storedprefab}
12.  

 

Just got a chance to test it and it works! Thanks!