functionManager.cs

using UnityEngine;
using System.Collections;
public class functionManager : MonoBehaviour {
	public Vector2[] direction; //holds all six movement directions
	const float vertPart = 0.8666f; // sqrt(3)/2
	float tileSize;
	[SerializeField] statsManager dataBase;
	
	void Start () {
		//Debug.Log (getDistance (new Vector2 (2f, -1f), new Vector2 (0f, 0f)));
		//Debug.Log (getDistance (new Vector2 (3f, -2f), new Vector2 (2f, 0f)));
		//Debug.Log (getDistance (new Vector2 (-2f, 1f), new Vector2 (0f, 0f)));
		//Debug.Log (getDistance (new Vector2 (-2f, 1f), new Vector2 (1f, 0f)));
		//Debug.Log (isNear (new Vector2 (2f, 0f), new Vector2 (-1f, 1f)));
		//Debug.Log (isNear (new Vector2 (2f, 0f), new Vector2 (2f, -1f)));
		//Debug.Log (isOutOfBounds (new Vector2 (4f, -4f)));
		//Debug.Log (isOutOfBounds (new Vector2 (5f, -4f)));
		//Debug.Log (hexPositionTransform (new Vector2 (3f, -2f)));
		//Debug.Log (hexPositionTransform (new Vector2 (2f, 0f)));
		direction = new Vector2[6];
		Vector2 right = new Vector2 (1f, 0f);
		Vector2 left = new Vector2 (-1f, 0f);
		Vector2 up = new Vector2 (0f, 1f);
		Vector2 down = new Vector2 (0f, -1f);
		Vector2 forward = new Vector2 (1f, -1f);
		Vector2 back = new Vector2 (-1f, 1f);
		direction [0] = right;
		direction [1] = left;
		direction [2] = up;
		direction [3] = down;
		direction [4] = forward;
		direction [5] = back;
		tileSize = dataBase.tileSize; // This could vary according to our board
	}
	
	// Update is called once per frame
	void Update () {
		
	}
	
	public Vector3 hexPositionTransform(Vector2 v){ //position in Unity space
		return new Vector3 (tileSize * (v.x + (0.5f * v.y)), tileSize * vertPart * v.y, 0f);
	}
	public bool isNear(Vector2 v1, Vector2 v2){ //v1 and v2 are adjacent to each other
		return getDistance(v1,v2) == 1;
	}
	public int getDistance(Vector2 v1, Vector2 v2){ //shortest path in tiles from v1 to v2
		int x2 = (int)(v2.x - v1.x);
		int y2 = (int)(v2.y - v1.y);
		int z = 0 - x2 - y2;
		int dist = Mathf.Abs(x2) + Mathf.Abs(y2) + Mathf.Abs(z);
		dist = dist/2;
		return dist;
	}
	
	public bool isOutOfBounds(Vector2 v){ //see if the tile is in the board bounds
		Vector2 origin = new Vector2(0f,0f);
		return getDistance(origin,v) <= 4;
	}
	
	public bool areAligned(Vector2 v){	// See if direction is along one of the six ones
		return (v.x==0||v.y==0||v.x==-v.y);
	}
	
	public Vector2 getNormal(Vector2 v){ //return the identity vector along the 6 directions if areAligned
		int x = 0;
		int y = 0;
		if(v.x != 0){
			x = Mathf.RoundToInt(Mathf.Sign(v.x));	// Sign returns a float
		}
		if(v.y != 0){
			y = Mathf.RoundToInt(Mathf.Sign(v.y));
		}
		return new Vector2 (x, y);
	}
	
}