HK_LongZhiMeng/Assets/Scripts/SelectionManager/Utils.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Utils : MonoBehaviour
{
    static Texture2D _whiteTexture;
    public static Texture2D WhiteTexture
    {
        get
        {
            if (_whiteTexture == null)
            {
                _whiteTexture = new Texture2D(1, 1);
                _whiteTexture.SetPixel(0, 0, Color.white);
                _whiteTexture.Apply();
            }

            return _whiteTexture;
        }
    }
    public static Rect GetScreenRect(Vector3 screenPosition1, Vector3 screenPosition2)
    {
        screenPosition1.y = Screen.height - screenPosition1.y;
        screenPosition2.y = Screen.height - screenPosition2.y;
        var topLeft = Vector3.Min(screenPosition1, screenPosition2);
        var bottomRight = Vector3.Max(screenPosition1, screenPosition2);

        return Rect.MinMaxRect(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y);
    }
    public static void DrawScreenRect(Rect rect, Color color)
    {
        GUI.color = color;
        GUI.DrawTexture(rect, WhiteTexture);
        GUI.color = Color.white;
    }
    public static void DrawScreenRectBorder(Rect rect, float thickness, Color color)
    {
        //draw box
        Utils.DrawScreenRect(new Rect(rect.xMin, rect.yMin, rect.width, thickness), color);
        Utils.DrawScreenRect(new Rect(rect.xMin, rect.yMin, thickness, rect.height), color);
        Utils.DrawScreenRect(new Rect(rect.xMax - thickness, rect.yMin, thickness, rect.height), color);
        Utils.DrawScreenRect(new Rect(rect.xMin, rect.yMax - thickness, rect.width, thickness), color);
    }
    public static Bounds GetViewportBounds(Camera camera, Vector3 screenPosition1, Vector3 screenPosition2)
    {
        var v1 = camera.ScreenToViewportPoint(screenPosition1);
        var v2 = camera.ScreenToViewportPoint(screenPosition2);
        var min = Vector3.Min(v1, v2);
        var max = Vector3.Max(v1, v2);
        min.z = camera.nearClipPlane;
        max.z = camera.farClipPlane;

        var bounds = new Bounds();
        bounds.SetMinMax(min, max);
        return bounds;
    }

    public static GameObject[] FindGameObjectsWithTag(string tag, List<GameObject> List)
    {
        List<GameObject> returnList = new List<GameObject>();
        foreach (GameObject transform in List)
        {
            if (transform.tag == tag) { returnList.Add(transform); }
        }
        return returnList.ToArray();
    }

    public static GameObject[] FindGameObjectsWithLayer(int layer, List<GameObject> Listr)
    {
        List<GameObject> returnList = new List<GameObject>();
        foreach (GameObject transform in Listr)
        {
            if (transform != null)
            {
                if (transform.gameObject.layer == layer) { returnList.Add(transform.gameObject); }
            }
            
        }
        return returnList.ToArray();
    }

    //public static GameObject[] FindGameObjectsWithName(string name, Transform container)
    //{
    //    List<GameObject> returnList = new List<GameObject>();
    //    foreach (Transform transform in container)
    //    {
    //        if (transform.gameObject.name == name) { returnList.Add(transform.gameObject); }
    //    }
    //    return returnList.ToArray();
    //}

    public static GameObject[] FindGameObjectsInList(List<GameObject> List)
    {
        List<GameObject> returnList = new List<GameObject>();
        foreach (GameObject transform in List)
        {
            returnList.Add(transform);
        }
        return returnList.ToArray();

    }
}