Binding on Unity C#

BindTest.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ProceduralModeling;

public class BindTest : MonoBehaviour
{

    [SerializeField] private Mesh _mesh;
    [SerializeField] SkinnedMeshRenderer _renderer;
    private int NUM = 50;
    [SerializeField] public Transform[] bones;
    private CatmullRomCurve _curve;
    [SerializeField] private Vector3 _up;

    // Start is called before the first frame update
    void Start()
    {
        
        //各頂点にウェイトを埋め込む
        BoneWeight[] weights = new BoneWeight[_mesh.vertexCount];
        var verts = _mesh.vertices;
        for(int i=0;i<_mesh.vertexCount;i++){
            
            weights[i].boneIndex0 = Mathf.FloorToInt( (verts[i].z+1f)/2f*(NUM-1) );
//            Debug.Log("r" + verts[i].z );
            //Debug.Log("weight" + weights[i].boneIndex0);
            weights[i].weight0 = 1;//その度合い

        }
        _mesh.boneWeights = weights;


        
        bones = new Transform[NUM];
        Matrix4x4[] bindPoses = new Matrix4x4[NUM];

        for(int i=0;i<NUM;i++){

            bones[i] = new GameObject("hoge"+i).transform;
            //bones[i].parent = i==0 ? transform : bones[i-1];
            bones[i].parent = transform;


            bones[i].localRotation = Quaternion.identity;
            bones[i].localPosition = new Vector3(0,0,(float)i/(float)(NUM-1)-0.5f);

            //bindPoses[i] = bones[i].worldToLocalMatrix * bones[i].parent.localToWorldMatrix;
            bindPoses[i] = bones[i].worldToLocalMatrix * transform.localToWorldMatrix;

        }

        _mesh.bindposes = bindPoses;

        _renderer.bones = bones;
        _renderer.sharedMesh = _mesh;


        _curve = new CatmullRomCurve();
		_curve.Points.Clear();

		for(int i=0;i<NUM;i++){
            var p = new Vector3(
                5f*Mathf.Sin(3*Time.time + 35f*(float)i/(float)NUM),
                5f*Mathf.Cos(3*Time.time + 42f*(float)i/(float)NUM),
                5f*Mathf.Sin(3*Time.time + 31f*(float)i/(float)NUM)
            );
            _curve.Points.Add(p);
        }


    }

    // Update is called once per frame
    void Update()
    {

        var ff = _curve.ComputeFrenetFrames(NUM);

        for(int i=0;i<NUM;i++){
            
            bones[i].localPosition = _curve.GetPointAt((float)i/(float)NUM);
            bones[i].localRotation = Quaternion.LookRotation(
                ff[i].Tangent,
                _up
            );

        }
    
    }
}