unity代碼筆記自動尋徑

其實自動尋徑的功能，在unity已經完美封裝好了，我們應該做的就是對其中封裝好的屬性函數進行完美的使用。

using UnityEngine;
using System.Collections;

public class Locomotion
{
    private Animator m_Animator = null;

    private int m_SpeedId = 0;
    private int m_AgularSpeedId = 0;
    private int m_DirectionId = 0;

    public float m_SpeedDampTime = 0.1f;//設置動畫參數speed時的插值時間
    public float m_AnguarSpeedDampTime = 0.25f;//Teddy對象旋轉一定方向的時候小號的時間，用於計算運動時的角速度。
    public float m_DirectionResponseTime = 0.2f;

    public Locomotion(Animator animator)
    {
        m_Animator = animator;

        m_SpeedId = Animator.StringToHash("Speed");
        m_AgularSpeedId = Animator.StringToHash("AngularSpeed");
        m_DirectionId = Animator.StringToHash("Direction");
    }

    public void Do(float speed, float direction)
    {
        //是否處於兩個動畫狀態的國度狀態上
        AnimatorStateInfo state = m_Animator.GetCurrentAnimatorStateInfo(0);

        bool inTransition = m_Animator.IsInTransition(0);
        bool inIdle = state.IsName("Locomotion.Idle");
        bool inTurn = state.IsName("Locomotion.TurnOnSpot") || state.IsName("Locomotion.PlantNTurnLeft") || state.IsName("Locomotion.PlantNTurnRight");
        bool inWalkRun = state.IsName("Locomotion.WalkRun");

        float speedDampTime = inIdle ? 0 : m_SpeedDampTime;
        float angularSpeedDampTime = inWalkRun || inTransition ? m_AnguarSpeedDampTime : 0;
        float directionDampTime = inTurn || inTransition ? 1000000 : 0;

        float angularSpeed = direction / m_DirectionResponseTime;

        m_Animator.SetFloat(m_SpeedId, speed, speedDampTime, Time.deltaTime);
        m_Animator.SetFloat(m_AgularSpeedId, angularSpeed, angularSpeedDampTime, Time.deltaTime);
        m_Animator.SetFloat(m_DirectionId, direction, directionDampTime, Time.deltaTime);
    }   
}

第一個類，作爲工具類進行使用。

using UnityEngine;
using System.Collections;

public class Agent : MonoBehaviour {

    public GameObject           particle;
    protected NavMeshAgent      agent;
    protected Animator          animator;

    protected Locomotion locomotion;
    protected Object particleClone;


    // Use this for initialization
    void Start () {
        agent = GetComponent<NavMeshAgent>();
        agent.updateRotation = false;

        animator = GetComponent<Animator>();
        locomotion = new Locomotion(animator);

        particleClone = null;
    }

    protected void SetDestination()
    {
        // Construct a ray from the current mouse coordinates
        var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit = new RaycastHit();
        if (Physics.Raycast(ray, out hit))
        {
            if (particleClone != null)
            {
                GameObject.Destroy(particleClone);
                particleClone = null;
            }

            // Create a particle if hit
            Quaternion q = new Quaternion();
            q.SetLookRotation(hit.normal, Vector3.forward);
            particleClone = Instantiate(particle, hit.point, q);

            agent.destination = hit.point;
        }
    }

    protected void SetupAgentLocomotion()
    {
        if (AgentDone())
        {
            locomotion.Do(0, 0);
            if (particleClone != null)
            {
                GameObject.Destroy(particleClone);
                particleClone = null;
            }
        }
        else
        {
            float speed = agent.desiredVelocity.magnitude;

            Vector3 velocity = Quaternion.Inverse(transform.rotation) * agent.desiredVelocity;

            float angle = Mathf.Atan2(velocity.x, velocity.z) * 180.0f / 3.14159f;

            locomotion.Do(speed, angle);
        }
    }

    void OnAnimatorMove()
    {
        agent.velocity = animator.deltaPosition / Time.deltaTime;
        transform.rotation = animator.rootRotation;
    }

    protected bool AgentDone()
    {
        return !agent.pathPending && AgentStopping();
    }

    protected bool AgentStopping()
    {
        return agent.remainingDistance <= agent.stoppingDistance;
    }

    // Update is called once per frame
    void Update () 
    {
        if (Input.GetButtonDown ("Fire1")) 
            SetDestination();

        SetupAgentLocomotion();
    }
}

第二個類綁定在人物上。從而實現對地圖點擊人物自動循徑。