Version: 2017.2
public Vector3 barycentricCoordinate ;

説明

ヒットした三角形の重心座標

この関数で3軸に沿った頂点データのいずれかを補完できます。

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); } }