GUI自适应矩阵

以下内容摘录自《unity游戏案例开发大全》

using UnityEngine;
using System.Collections;

public class Menu : MonoBehaviour
{

    public static float desiginWidth;//屏幕宽和高
    public static float desiginHeight;

    /// <summary>
    /// 获取GUI自适应矩阵
    /// </summary>
    /// <returns></returns>
    public static Matrix4x4 getMatrix()
    {
        //获取单位矩阵
        Matrix4x4 guiMatri4x4 = Matrix4x4.identity;
        //计算位移距离
        float lux = (Screen.width - desiginWidth * Screen.height / desiginHeight) / 2.0f;
        //设置GUI矩阵
        guiMatri4x4.SetTRS(new Vector3(lux, 0, 0), Quaternion.identity, new Vector3(Screen.height / desiginHeight, Screen.height / desiginHeight, 1));
        return guiMatri4x4;
    }

    /// <summary>
    /// GUI逆矩阵
    /// </summary>
    /// <returns></returns>
    public static Matrix4x4 getInvertMatrix()
    {
        //获取矩阵
        Matrix4x4 guiInverseMatrix = getMatrix();
        //计算逆矩阵
        guiInverseMatrix = Matrix4x4.Inverse(guiInverseMatrix);
        return guiInverseMatrix;
    }
}