2D Mathf determine Vector direction

Hello

I need to find out how to get a direction of a Vector in 2D. Eg. North, South, East, West

If you can imagine two objects one is blue and the other is black. The blue one is static but the black one can move around as time goes by so I need to figure out where the black object is at any point and return a direction. I'm just not sure how to go about it.

Basically I have a sprite which requires it looks at the player when something hits the collider. The easiest way I could figure to do this with the animation system was to create directions and have the sprite face that direction so it appears to look at the object.

So my question is how can you determine direction of a vector from the static object on the X or Y axis

 

try, black position minus blue positon. I think you should then get the direction from blue to black.

or use LookAt Unfortunately, the function is for 3d. And works with z-axe (but default gameobject can be rotated in editor). Maybe there is something similar in 2d, i dont know.

 

You can't use vector3.lookat & clamp the axis you don't want it to rotate around?

 

The following will give you the angle between two object.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class Direction : MonoBehaviour
5. {
6.     public GameObject trace;
7.  
8.     void Update ()
9.     {
10.         Vector2 dir = trace.transform.position - transform.position;
11.         float angle = Mathf.Atan2(dir.y, dir.x)*Mathf.Rad2Deg;
12.  
13.         Debug.Log(angle);
14.     }
15. }
16.  

 

Thanks.