using UnityEngine;

public class PlayBoundary : MonoBehaviour {

    public float xMin;
    public float xMax;
    public float yMin;
    public float yMax;

    private Vector3 topLeftCorner;
    private Vector3 topRightCorner;
    private Vector3 bottomLeftCorner;
    private Vector3 bottomRightCorner;

    private void Start ()
    {
        //prevents wrong corner values
        if (xMin > xMax)
            Debug.LogError ("xMin cannot be larger than xMax");
        if (yMin > yMax)
            Debug.LogError ("yMin cannot be larger than yMax");
    }

    private void OnDrawGizmos ()
    {
        //Sets values for each corner of the boundary
        topLeftCorner = new Vector3 (xMin * 1.25f, yMax * 1.25f, 0f);
        topRightCorner = new Vector3 (xMax * 1.25f, yMax * 1.25f, 0f);
        bottomLeftCorner = new Vector3 (xMin * 1.25f, yMin * 1.25f, 0f);
        bottomRightCorner = new Vector3 (xMax * 1.25f, yMin * 1.25f, 0f);

        Gizmos.color = Color.red;

        //Left line
        Gizmos.DrawLine (bottomLeftCorner, topLeftCorner);
        //Top line
        Gizmos.DrawLine (topLeftCorner, topRightCorner);
        //Right line
        Gizmos.DrawLine (bottomRightCorner, topRightCorner);
        //Bottom line
        Gizmos.DrawLine (bottomLeftCorner, bottomRightCorner);
    }