Version: 2017.2

RaycastHit.barycentricCoordinate

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public Vector3 barycentricCoordinate ;

描述

命中的三角形的重心坐标。

这使您可以沿着 3 个轴插入任何顶点数据。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void Update() { RaycastHit hit; if (!Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit)) return; MeshCollider meshCollider = hit.collider as MeshCollider; if (meshCollider == null || meshCollider.sharedMesh == null) return; Mesh mesh = meshCollider.sharedMesh; Vector3[] normals = mesh.normals; int[] triangles = mesh.triangles; Vector3 n0 = normals[triangles[hit.triangleIndex * 3 + 0]]; Vector3 n1 = normals[triangles[hit.triangleIndex * 3 + 1]]; Vector3 n2 = normals[triangles[hit.triangleIndex * 3 + 2]]; Vector3 baryCenter = hit.barycentricCoordinate; Vector3 interpolatedNormal = n0 * baryCenter.x + n1 * baryCenter.y + n2 * baryCenter.z; interpolatedNormal = interpolatedNormal.normalized; Transform hitTransform = hit.collider.transform; interpolatedNormal = hitTransform.TransformDirection(interpolatedNormal); Debug.DrawRay(hit.point, interpolatedNormal); } }