/// <summary>
/// Places the prefab by instantiating it at a given location on the map.
/// Modified to work over X/Y axis. Disregards topDown variable from ProDManager.
/// Added layer argument.
/// </summary>
/// <param name='prefab'>
/// The prefab.
/// </param>
/// <param name='map'>
/// The map which the tile belongs to.
/// </param>
/// <param name='address'>
/// The adress of the tile in the map.
/// </param>
/// <param name='orientation'>
/// The orientation of the tile.
/// </param>
/// <param name='layer'>
/// Where on the Z axis the prefab will be placed.
/// </param>
public void PlacePrefab(GameObject prefab, Map map, Address address, string[] orientation, float layer)
{
    if(prefab == null) {
        Debug.LogError("Null is not a valid prefab for placement.");
        return;
    }

    // Setup variables
    float prefab_X = 0;
    float prefab_Y = 0;
    float prefab_Z = layer;

    // Location in worldMap
    prefab_X = map.addressOnWorldMap.x * map.size_X * ProDManager.Instance.tileSpacingX;
    prefab_Y = map.addressOnWorldMap.y * map.size_Y * ProDManager.Instance.tileSpacingY;

    // Location in Map
    prefab_X += address.x * ProDManager.Instance.tileSpacingX; // Default tileSpacingX is 1
    prefab_Y += address.y * ProDManager.Instance.tileSpacingY; // Default tileSpacingY is 1
    prefab_Z += prefab.transform.position.z; // This adds the Z position of the prefab to prefab_Z

    GameObject cellGO = (GameObject) Instantiate(prefab, new Vector3(prefab_X, prefab_Y, prefab_Z), prefab.transform.rotation);

    // Re-parent the instantiated object. This is expensive, so only do it if GroupTiles is enabled
    if (groupTiles) {
        cellGO.transform.parent = this.parentObject.transform;
    }

    allPrefabs.Add(cellGO.gameObject);

    return;
}

/// <summary>
/// Get the layer the prefab should go on. The layer modifies where on the Z axis the prefab is placed.
/// </summary>
/// <returns>
/// Z-axis position as a float
/// </returns>
/// <param name='type'>
/// The type of tile
/// </param>
public float GetLayer( string type )
{
    // Default values for layers
    float levelLayer = 10;
    float objectLayer = 8;
    float sceneryLayer = 6;
    float shadowLayer = 4;
    float itemLayer = 2;
    float characterLayer = 0;

    if(type == "Abyss") {
        return levelLayer;
    } else if(type == "Wall") {
        return levelLayer;
    } else if (type == "Path") {
        return levelLayer;
    } else if (type == "Door") {
        return objectLayer;
    } else if (type == "Entrance" || type == "Exit") {
        return objectLayer;
    }

    // Default return
    return 0;
}