Unity简单的通过鼠标点击移动

public class PlayerController : MonoBehaviour
{

    public float m_Speed = 10;
    public float m_RotationSpeed = 10;

    private Vector3 m_TargetPos = Vector3.zero;
    private Quaternion m_TargetQuaternion;

    private CharacterController m_CharacterController;
    private void Start()
    {
        m_CharacterController = GetComponent<CharacterController>();
    }

    private void Update()
    {
        if (Input.GetMouseButton(0))
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hitinfo;
            if (Physics.Raycast(ray, out hitinfo))
            {
                if (hitinfo.transform.CompareTag("Ground"))
                {
                    m_TargetPos = hitinfo.point;
                    m_RotationSpeed = 0;
                }
            }
        }

        if (!m_CharacterController.isGrounded)
        {
            m_CharacterController.Move(transform.position + new Vector3(0, -1000, 0) - transform.position);
        }

        if (m_TargetPos != Vector3.zero)
        {
            if (Vector3.Distance(m_TargetPos, transform.position) > 0.1f)
            {
                Vector3 direction = (m_TargetPos - transform.position).normalized;
                direction *= Time.deltaTime * m_Speed;
                direction.y = 0;

                if (m_RotationSpeed <= 1)
                {
                    m_RotationSpeed += 5f * Time.deltaTime;
                    m_TargetQuaternion = Quaternion.LookRotation(direction);
                    transform.rotation = Quaternion.Lerp(transform.rotation, m_TargetQuaternion, m_RotationSpeed);

                }
                m_CharacterController.Move(direction);
            }
        }

    }

}

static class StringUtil //对String类添加扩展方法
{
    public static int toInt(this string s)
    {
        return 12;
    }
}