QK HUD Manager

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

/* ----------------------------------------------------------------------------
 * Main hud control, contains functions for updating HUD information on the player's screen
 * these functions are designed to be called from whatever script needs to update them.
 * ----------------------------------------------------------------------------
 */

public class GameHUD : MonoBehaviour {

    public GameObject worldMapCanvas;               //All the game map elements
    public GameObject gameMap;                      //The map iamge on a plane
    public GameObject player;                       //reference to player

    GameObject mapCam;                              //Camera used for minimap
    GameObject objectiveText;                       //Objective Text UI element
    GameObject[] mapLabels;                         //Array of text taht appears on minimap

    GameObject compassCameraPoint;                  //Point at camera location used to calculate objective positions

    public GameObject testObjective;

    void Awake () {

        //Turn on UI stuff
        worldMapCanvas.SetActive (true);

        //Fill mapLabels array
        mapLabels = GameObject.FindGameObjectsWithTag ("worldMapLabel");

        //Set mapcam reference
        mapCam = GameObject.Find ("mapCam");
        //Set compassCameraPoint reference
        compassCameraPoint = GameObject.Find ("compassCameraPoint");

    }


    void Update () {
        //this is for testing, call update map from player movements
        rotateMapObjects ();

        //Set the compass indicator
        setCompassValue (calculateObjectiveAngle (testObjective));
        Debug.Log("Angle found: " + calculateObjectiveAngle(testObjective));

    }

    //Call this to update objective tet at top of the screen
    public void UpdateObjectiveText (string newObjective) {
        objectiveText.GetComponent<Text> ().text = "Objective: " + newObjective;
    }

    //Rotates map labels so that the text is always right side up, call this from anything that rotates the camera
    //right now its based on Player rotation, needs to be based on camera
    public void rotateMapObjects () {
        Quaternion newRotation;
        foreach(GameObject curLabel in mapLabels) {
            newRotation = Quaternion.Euler(new Vector3(90,0,-player.transform.rotation.eulerAngles.y));
            curLabel.GetComponent<RectTransform>().rotation = newRotation;
        }
    }

    public void setCompassValue (float newValue) {
        GameObject compass = GameObject.Find ("compassSlider");
        if (newValue > 40) {
            newValue = 40;
        }
        compass.GetComponent<Slider> ().value = newValue;
    }

    public float calculateObjectiveAngle (GameObject objective) {
        Vector3 pointToObjective;
        Vector3 pointStraightFromCam;

        //Set points to determine which side of the player the vector towards the objective is going
        GameObject camPointRight = GameObject.Find ("camPointRight");
        GameObject camPointleft = GameObject.Find ("camPointLeft");


        //create vector3 from player to objective and normalize it
        pointToObjective = objective.gameObject.transform.position - compassCameraPoint.transform.position;
        pointToObjective.Normalize ();

        //Set this vector to point straight away from camera
        pointStraightFromCam = compassCameraPoint.transform.forward;
        pointStraightFromCam.Normalize ();

        //if point to objective is closer to the left side return a negative angle, else return a positive one
        if (Vector3.Distance (pointToObjective, camPointRight.transform.position) >= Vector3.Distance (pointToObjective, camPointleft.transform.position)) {
            return -Vector3.Angle(pointStraightFromCam, pointToObjective);
        }
        else  {
            return Vector3.Angle(pointStraightFromCam, pointToObjective);
        }

    }
}