drecon-unity/Assets/8_Scripts/2_General/ModifyBlendShape.cs

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

public class ModifyBlendShape : MonoBehaviour
{
    private SkinnedMeshRenderer m_SkinnedMeshRenderer;


    private void Awake(){
        m_SkinnedMeshRenderer = this.GetComponent<SkinnedMeshRenderer>();
        StartCoroutine(BlendShapeRoutineEyes());
        //StartCoroutine(BlendShapeRoutineMouth());
    }

    private IEnumerator BlendShapeRoutineEyes(){
        yield return new WaitForSecondsRealtime(Random.Range(5f, 10f));
        // Blink!
        m_SkinnedMeshRenderer.SetBlendShapeWeight(0, Mathf.SmoothStep(0, 100, 1));
        m_SkinnedMeshRenderer.SetBlendShapeWeight(1, Mathf.SmoothStep(0, 100, 1));
        yield return new WaitForSecondsRealtime(Random.Range(0.25f, 0.75f));
        m_SkinnedMeshRenderer.SetBlendShapeWeight(0, Mathf.SmoothStep(0, 100, 0));
        m_SkinnedMeshRenderer.SetBlendShapeWeight(1, Mathf.SmoothStep(0, 100, 0));
        StartCoroutine(BlendShapeRoutineEyes());
    }

    private void Update(){
        BlendNoise();
    }

    private void BlendNoise(){
        float noise = Mathf.PerlinNoise(Time.time * 0.1f, Time.time * 0.1f);
        // m_SkinnedMeshRenderer.SetBlendShapeWeight(0, Mathf.SmoothStep(0, 100, noise));
        // m_SkinnedMeshRenderer.SetBlendShapeWeight(1, Mathf.SmoothStep(0, 100, noise));
        m_SkinnedMeshRenderer.SetBlendShapeWeight(2, Mathf.SmoothStep(0, 75, noise));
        m_SkinnedMeshRenderer.SetBlendShapeWeight(3, Mathf.SmoothStep(0, 75, noise));
    }


    private IEnumerator BlendShapeRoutineMouth(){
        yield return new WaitForSeconds(1);
    }


}