Tag: Exchange

I'm trying to create a radar effect (almost GTA-shaped minimap). The radar shows the position of an enemy (represented by a small image) when in range.
The problem I have here is: I want the radar to indicate if the enemy is higher or lower than the player (if the y-position of the enemy is greater or less than the y-position of the player).
I want to accomplish this goal by switching the image on the radar (representing the enemy) to a different image relative to the y-position of the enemy.

Here is my radar script:

public class RadarObject

{

public Image icon { get; set; }
public GameObject owner { get; set; }

}

public radar: MonoBehaviour
{

(SerializeField) private Transform playerPosition;

private float MapScale = 2.0f;

private Image NormalImage;
private Image UpImage;
private Image DownImage;

public static List radObjects = new List();

public static Radar Instance;

private void Awake()
{
    Instance = this;
}

public void CustomRegisterRadarObject(GameObject o, Image u, Image d, Image n)
{
    NormalImage = Instantiate(n);
    UpImage = Instantiate(u);
    DownImage = Instantiate(d);

    radObjects.Add(new RadarObject() { owner = o, icon = NormalImage });
    radObjects.Add(new RadarObject() { owner = o, icon = UpImage });
    radObjects.Add(new RadarObject() { owner = o, icon = DownImage });
}

public static void RemoveRadarObject(GameObject o)
{
    List newList = new List();
    for(int i = 0; i < radObjects.Count; i++)
    {
        if(radObjects(i).owner == o)
        {
            Destroy(radObjects(i).icon);
            continue;
        }
        else
        {
            newList.Add(radObjects(i));
        }
    }
    radObjects.RemoveRange(0, radObjects.Count);
    radObjects.AddRange(newList);
}

private void DrawRadarDots()
{
    foreach (RadarObject ro in radObjects)
    {
        Vector3 radarPos = (ro.owner.transform.position - playerPosition.position);
        float distToObject = Vector3.Distance(playerPosition.position, ro.owner.transform.position) * MapScale;
        float deltaY = Mathf.Atan2(radarPos.x, radarPos.z) * Mathf.Rad2Deg - 270 - playerPosition.eulerAngles.y;
        radarPos.x = distToObject * Mathf.Cos(deltaY * Mathf.Deg2Rad) * -1;
        radarPos.z = distToObject * Mathf.Sin(deltaY * Mathf.Deg2Rad);

        ro.icon.transform.SetParent(transform);
        ro.icon.transform.position = new Vector3(radarPos.x, radarPos.z, 0) + transform.position;
    }
}

void Update()
{
    DrawRadarDots();
}

public void CheckHeightDifference(Transform o)
{
    foreach (RadarObject ro in radObjects)
    {
        if (o.position.y > playerPosition.position.y && ro.icon.color != Color.yellow)  //if enemy is above the player
        {
            //ro.icon.color = Color.yellow;
            ro.icon = UpImage;
        }
        else if (o.position.y < playerPosition.position.y && ro.icon.color != Color.red)    //if enemy is below the player
        {
            //ro.icon.color = Color.red;
            ro.icon = DownImage;
        }
        else if (o.position.y == playerPosition.position.y && ro.icon.color != Color.green) //if enemy and the player are at the same height
        {
            //ro.icon.color = Color.green;
            ro.icon = NormalImage;
        }
    }
}

}

And here's the script attached to the enemy to make it visible on the radar:

public class MakeAvailableOnRadar : MonoBehaviour

{

(SerializeField) private Image RadarImage; //Image that shows if the player and enemy are at the same height
(SerializeField) private Image RadarImageUp; //Image that shows if the enemy is higher than the player
(SerializeField) private Image RadarImageDown; //Image that shows if the enemy is lower than the player

private Radar radar;

void Start()
{
    radar = Radar.Instance;

    radar.CustomRegisterRadarObject(gameObject, RadarImageUp, RadarImageDown, RadarImage);
}

private void Update()
{
    radar.CheckHeightDifference(transform);
}

void OnDisable()
{
    Radar.RemoveRadarObject(gameObject);
}

}

It does not seem to work the way I want it to. Is there a workaround? How do I fix this?

I follow Hollistic3D's Creating a Mini Card System in Unity 5 (https://www.youtube.com/watch?v=LP2XHHeQuvg) as a guide.