Version: 2017.3

Matrix4x4.MultiplyPoint3x4

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public Vector3 MultiplyPoint3x4 (Vector3 point);

描述

按此矩阵变换位置(快速)。

返回按当前变换矩阵变换的位置 /v/。 此函数是更快版本的 MultiplyPoint;但是只能 处理常规 3D 变换。MultiplyPoint 较慢,但是也可以处理 投影变换。

另请参阅:MultiplyPointMultiplyVector

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float rotAngle; public float stretch; private MeshFilter mf; private Vector3[] origVerts; private Vector3[] newVerts; void Start() { mf = GetComponent<MeshFilter>(); origVerts = mf.mesh.vertices; newVerts = new Vector3[origVerts.Length]; } void Update() { Quaternion rot = Quaternion.Euler(rotAngle, 0, 0); Matrix4x4 m = Matrix4x4.TRS(Vector3.zero, rot, Vector3.one); Matrix4x4 inv = m.inverse; int i = 0; while (i < origVerts.Length) { Vector3 pt = m.MultiplyPoint3x4(origVerts[i]); pt.y *= stretch; newVerts[i] = inv.MultiplyPoint3x4(pt); i++; } mf.mesh.vertices = newVerts; } }