How to make the MMD model move?

Unity Engine
1

Hello all,

I just started to learn Unity and imported a model by MMD4mecanim into Unity. What I want to do is simple: control it to move.

The model has physics (hair, cloths, etc.), which shows properly in Unity. And I prepared two animations for it: walk and idle.

I set the animator controller and used the script as follows (I followed the tutoriallJohn Lemon’s Haunted Jaunt: 3D Beginner John Lemon's Haunted Jaunt: 3D Beginner - Unity Learn):

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

public class PlayerMovement : MonoBehaviour
{
    public float turnSpeed = 20f;

    Animator m_Animator;
    Rigidbody m_Rigidbody;
    Vector3 m_Movement;
    Quaternion m_Rotation = Quaternion.identity;

    void Start ()
    {
        m_Animator = GetComponent<Animator> ();
        m_Rigidbody = GetComponent<Rigidbody> ();
    }

    void FixedUpdate ()
    {
        float horizontal = Input.GetAxis ("Horizontal");
        float vertical = Input.GetAxis ("Vertical");
       
        m_Movement.Set(horizontal, 0f, vertical);
        m_Movement.Normalize ();

        bool hasHorizontalInput = !Mathf.Approximately (horizontal, 0f);
        bool hasVerticalInput = !Mathf.Approximately (vertical, 0f);
        bool isWalking = hasHorizontalInput || hasVerticalInput;
        m_Animator.SetBool ("IsWalking", isWalking);

        Vector3 desiredForward = Vector3.RotateTowards (transform.forward, m_Movement, turnSpeed * Time.deltaTime, 0f);
        m_Rotation = Quaternion.LookRotation (desiredForward);
    }

    void OnAnimatorMove ()
    {
        m_Rigidbody.MovePosition (m_Rigidbody.position + m_Movement * m_Animator.deltaPosition.magnitude);
        m_Rigidbody.MoveRotation (m_Rotation);
    }
}

However, the model just turned around at the same location and didn’t move when I tried to control it with the keyboard. Do I need to modify the script when I use a model with physics imported by MMD4mecanim? How to solve this problem?

5157089--510911--20191109_162534.gif

1 Like
2

I’ve solved this problem. The script is right, and what made trouble was the configuration. The default status of “root bone” is “none” after the model is translated by MMD4mecanim. I changed it to the “center bone” and the model can move properly :slight_smile:

1 Like