Matrix4x4

using UnityEngine;
using System.Collections;

public class juzhenTest : MonoBehaviour {
#region MultiplyVector
    //public Transform tr;
    //Matrix4x4 m1 =  Matrix4x4.identity;
    //Matrix4x4 m2 = Matrix4x4.identity;
 // Use this for initialization
    //void Start () {
    //    //m1.SetRow(0,new Vector4(1,2,3,4));
    //    //m1.SetRow(1, new Vector4(1, 2, 3, 4));
    //    //m1.SetRow(2, new Vector4(1, 2, 3, 4));
    //    //m1.SetRow(3, new Vector4(1, 2, 3, 4));
    //    //Debug.Log(m1);
    //    //Vector3 v1 = new Vector3(3,4,5);
    //    //Debug.Log(v1);
    //    //Vector3 v2 = m1.MultiplyPoint(v1);
    //    //Debug.Log(v2);
    //    //分别设置变换矩阵的位置变换和角度变换都不为0
    //    m1.SetTRS(Vector3.one*10.0f,Quaternion.Euler(new Vector3(0.0f,30.0f,0.0f)),Vector3.one);
    //    m2.SetTRS(Vector3.one * 10.0f, Quaternion.Euler(new Vector3(0.0f, 0.6f, 0.0f)), Vector3.one);
    //}
 
 // Update is called once per frame
    //void Update () {
    //    print(tr.position);
    //    tr.position = m2.MultiplyVector(tr.position);
    //    print(tr.position);
    //}
    //void OnGUI(){
    //if(GUI.Button(new Rect(10.0f,10.0f,120.0f,45.0f),"方向旋转30度"))
    //    {
    //    Vector3 v=m1.MultiplyVector(new Vector3(10.0f,0.0f,0.0f));
    //    //打印旋转后的向量，其方向发生了旋转
    //    print("变换后向量"+v);

    //    print(v.magnitude);
    //    }

    //}
#endregion
    #region MyRegion
    // Vector3 v1 = Vector3.one;
    //Vector3 v2 = Vector3.zero;

    //void Start() {
    //    Matrix4x4 m1 = Matrix4x4.identity;
    //    m1.SetTRS(Vector3.up*5,Quaternion.Euler(Vector3.up*45.0f),Vector3.one*2.0f);
    //    v2 = m1.MultiplyPoint3x4(v1);
    //    print(v1);
    //    print(v2);
   
    //}

    //void FixedUpdate() {
    //    Debug.DrawLine(Vector3.zero,v1,Color.green);
    //    Debug.DrawLine(Vector3.zero, v2, Color.red);
    //}
    #endregion
    #region MyRegion1
    Matrix4x4 Perspective = Matrix4x4.identity;//透视投影变量
    Matrix4x4 ortho = Matrix4x4.identity;//正交投影变量
    float l, r, b, t;//用于记录正交视口的左右下上的值
    void Start(){
        //设置透视投影矩阵
        Perspective = Matrix4x4.Perspective(65.0f,1.5f,0.1f,500f);
        t = 10.0f;
        b = -t;
        //为防止视图变形需要与Camera.main.aspect相乘
        l = b*Camera.main.aspect;
        r = t * Camera.main.aspect;
        //设置正交投影矩阵
        ortho = Matrix4x4.Ortho(l,r,b,t,0.1f,100.0f);
    }

    void OnGUI() {
        //使用默认正交投影
        if (GUI.Button(new Rect(10, 8, 150, 20), "Rect Ortho")) {
            Camera.main.orthographic = true;//相机是正交的true，是透视的false
            Camera.main.ResetProjectionMatrix();//让投影反映正常的相机参数
            Camera.main.orthographicSize = 5.1f;//在正交模式下相机的一半尺寸

        }
        //使用自定义正交投影
        if (GUI.Button(new Rect(10, 38, 150, 20), "use Ortho"))
        {
            ortho = Matrix4x4.Ortho(l,r,b,t,0.1f,100f);
            Camera.main.orthographic = true;
            Camera.main.ResetProjectionMatrix();
            Camera.main.projectionMatrix = ortho;//设置自定义的投影矩阵
            Camera.main.orthographicSize = 5.1f;
        }

        //使用自定义投影
        if (GUI.Button(new Rect(10, 68, 150, 20), "use Perspective"))
        {
            Camera.main.orthographic = false;
            Camera.main.projectionMatrix = Perspective;
        }
        //恢复系统默认透视投影
      if (GUI.Button(new Rect(10, 98, 150, 20), "Rect Perspective")) {
          Camera.main.orthographic = false;
          Camera.main.ResetProjectionMatrix();
        }
    }
    #endregion
}