理解Matrix4x4.MultiplyPoint()

好奇这个函数底层是怎么实现的。所以就是浏览了一些参考文献，然后做了个小实验。现记录如下。其中也有一些问题没有解决。。先来看Unity Manual

public Vector3 MultiplyPoint(Vector3 point);

Description

Transforms a position by this matrix (generic).

Returns a position v transformed by the current fully arbitrary matrix. If the matrix is a regular 3D transformation matrix, it is much faster to use MultiplyPoint3x4 instead. MultiplyPoint is slower, but can handle projective transformations as well.

using UnityEngine;

public class ScriptExample : MonoBehaviour
{
  void Start()
  {
    // Fin