Unity Code Rigging

SkinnedMeshRenderer.cs

using UnityEngine;
using System.Collections;

public class CustomSkinnedMesh : MonoBehaviour {

    public Transform[] bones;
    public Material mat;
    public AnimationClip clip;
    
    void Awake()
    {
        clip.wrapMode = WrapMode.PingPong;
    }

    void Start ()
    {
        Mesh m = new Mesh();
        m.vertices = new Vector3[]
        {
            new Vector3(-0.5f, -0.5f, 0f),
            new Vector3(-0.5f, 0.5f, 0f),
            new Vector3(0.5f, 0.5f, 0f),
            new Vector3(0.5f, -0.5f, 0f)
        };

        m.triangles = new int[] { 0, 1, 2, 0, 2, 3 };
        m.uv = new Vector2[]
        {
            new Vector2(0f, 0f),
            new Vector2(0f, 1f),
            new Vector2(1f, 1f),
            new Vector2(1f, 0f),
        };
        m.boneWeights = new BoneWeight[]
        {
            new BoneWeight() { boneIndex0 = 0, weight0 = 1f},
            new BoneWeight() { boneIndex0 = 0, weight0 = 1f},
            new BoneWeight() { boneIndex0 = 1, weight0 = 1f},
            new BoneWeight() { boneIndex0 = 1, weight0 = 1f}
        };

        m.bindposes = new Matrix4x4[]
        {
            bones[0].worldToLocalMatrix * transform.localToWorldMatrix,
            bones[1].worldToLocalMatrix * transform.localToWorldMatrix
        };

        m.RecalculateBounds();
        m.RecalculateNormals();

        SkinnedMeshRenderer smr = GetComponent<SkinnedMeshRenderer>();
        smr.sharedMesh = m;

        smr.bones = bones;
        smr.rootBone = transform;
        smr.material = mat;
        smr.quality = SkinQuality.Bone1;
    }
}