Mesh.bindposes official sample not working

Hi, I just copy and paste Mesh.bindposes official sample into unity 5.30, adjust the camera position and run.

The quad is static and no any animation. Do you know what's wrong?

Document: http://docs.unity3d.com/ScriptReference/Mesh-bindposes.html

My code:

using UnityEngine; using System.Collections;

//[ExecuteInEditMode] public class Test : MonoBehaviour {

 // Use this for initialization
 void Start () {
     gameObject.AddComponent<Animation>();
     gameObject.AddComponent<SkinnedMeshRenderer>();
     SkinnedMeshRenderer rend = GetComponent<SkinnedMeshRenderer>();
     Animation anim = GetComponent<Animation>();

     // Build basic mesh
     Mesh mesh = new Mesh();
     mesh.vertices = new Vector3[] { new Vector3(-1, 0, 0), new Vector3(1, 0, 0), new Vector3(-1, 5, 0), new Vector3(1, 5, 0) };
     mesh.uv = new Vector2[] { new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 1), new Vector2(1, 1) };
     mesh.triangles = new int[] { 0, 1, 2, 1, 3, 2 };
     mesh.RecalculateNormals();
     rend.material = new Material(Shader.Find("Diffuse"));

     // assign bone weights to mesh
     BoneWeight[] weights = new BoneWeight[4];
     weights[0].boneIndex0 = 0;
     weights[0].weight0 = 1;
     weights[1].boneIndex0 = 0;
     weights[1].weight0 = 1;
     weights[2].boneIndex0 = 1;
     weights[2].weight0 = 1;
     weights[3].boneIndex0 = 1;
     weights[3].weight0 = 1;
     mesh.boneWeights = weights;

     // Create Bone Transforms and Bind poses
     // One bone at the bottom and one at the top

     Transform[] bones = new Transform[2];
     Matrix4x4[] bindPoses = new Matrix4x4[2];
     bones[0] = new GameObject("Lower").transform;
     bones[0].parent = transform;
     // Set the position relative to the parent
     bones[0].localRotation = Quaternion.identity;
     bones[0].localPosition = Vector3.zero;
     // The bind pose is bone's inverse transformation matrix
     // In this case the matrix we also make this matrix relative to the root
     // So that we can move the root game object around freely
     bindPoses[0] = bones[0].worldToLocalMatrix * transform.localToWorldMatrix;

     bones[1] = new GameObject("Upper").transform;
     bones[1].parent = transform;
     // Set the position relative to the parent
     bones[1].localRotation = Quaternion.identity;
     bones[1].localPosition = new Vector3(0, 5, 0);
     // The bind pose is bone's inverse transformation matrix
     // In this case the matrix we also make this matrix relative to the root
     // So that we can move the root game object around freely
     bindPoses[1] = bones[1].worldToLocalMatrix * transform.localToWorldMatrix;

     mesh.bindposes = bindPoses;

     // Assign bones and bind poses
     rend.bones = bones;
     rend.sharedMesh = mesh;

     // Assign a simple waving animation to the bottom bone
     AnimationCurve curve = new AnimationCurve();
     curve.keys = new Keyframe[] { new Keyframe(0, 0, 0, 0), new Keyframe(1, 10, 0, 0), new Keyframe(2, 0.0F, 0, 0) };

     // Create the clip with the curve
     AnimationClip clip = new AnimationClip();
     clip.SetCurve("Lower", typeof(Transform), "localPosition.z", curve);
     clip.legacy = true;

// float animationLenghtInSeconds = 2; // var rot = Quaternion.Euler(0, 0, 30); // var localRotXCurve = AnimationCurve.EaseInOut(0, transform.localRotation.x, animationLenghtInSeconds, rot.x); // var localRotYCurve = AnimationCurve.EaseInOut(0, transform.localRotation.y, animationLenghtInSeconds, rot.y); // var localRotZCurve = AnimationCurve.EaseInOut(0, transform.localRotation.z, animationLenghtInSeconds, rot.z); // var localRotWCurve = AnimationCurve.EaseInOut(0, transform.localRotation.w, animationLenghtInSeconds, rot.w);

// clip.SetCurve("Lower", typeof(Transform), "localRotation.x", localRotXCurve ); // clip.SetCurve("Lower", typeof(Transform), "localRotation.y", localRotYCurve ); // clip.SetCurve("Lower", typeof(Transform), "localRotation.z", localRotZCurve ); // clip.SetCurve("Lower", typeof(Transform), "localRotation.w", localRotWCurve );

     // Add and play the clip
     clip.wrapMode = WrapMode.Loop;
     anim.AddClip(clip, "test");
     anim.Play("test");
 }
 
 // Update is called once per frame
 void Update () {
 
 }

}