yichael_smartbow/Assets/BowArrow/Scripts/Game/ArrowCamera.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
/* 拍摄箭飞行的摄像机 */
public class ArrowCamera : MonoBehaviour
{
    public Arrow arrow;
    ArrowCameraTemplate arrowCameraTemplate;

    void Awake()
    {
        BowCamera.ins.GetComponent<Camera>().enabled = false;
    }

    void Start()
    {
        if (arrow.simulatedParabola) {
            arrowCameraTemplate = new ArrowCameraTemplate2(this);
        } else {
            arrowCameraTemplate = new ArrowCameraTemplate1(this);  
        }
    }

    void OnDestroy()
    {
        BowCamera.ins.GetComponent<Camera>().enabled = true;
    }

    void FixedUpdate()
    {
        arrowCameraTemplate.Update(); 
    }
}
/* 模板2：从侧面看箭飞 */
class ArrowCameraTemplate2 : ArrowCameraTemplate 
{
    public ArrowCameraTemplate2(ArrowCamera arrowCamera)  : base(arrowCamera) {
        this.arrowCamera.transform.parent = null;
        arrowCamera.transform.localPosition = new Vector3(8.33f, 2.45f, 6.4f);
        arrowCamera.transform.localEulerAngles = new Vector3(0, -42, 0);
    }

    bool isHit = false;
    public override void Update() {
        if (!isHit) {
            isHit = arrowCamera.arrow.isHit;
            if (isHit) {
                this.arrowCamera.transform.SetParent(this.arrowCamera.arrow.transform);
                arrowCamera.transform.localPosition = new Vector3(-0.6f, 0.1f, -0.8f);
                arrowCamera.transform.LookAt(this.arrowCamera.arrow.transform.Find("Head"));
                Sequence seq = DOTween.Sequence();
                seq.PrependInterval(2.2f);
                seq.AppendCallback(delegate() {
                    this.arrowCamera.arrow.nextShoot();
                    this.arrowCamera.arrow.enabled = false;
                    GameObject.Destroy(this.arrowCamera.gameObject);
                });
                return;
            }
        }
        if (!arrowCamera.arrow) {
            GameObject.Destroy(this.arrowCamera.gameObject);
        }
    }
}
/* 模板1：跟着箭飞 */
class ArrowCameraTemplate1 : ArrowCameraTemplate 
{
    public ArrowCameraTemplate1(ArrowCamera arrowCamera)  : base(arrowCamera) {
        this.arrowCamera.arrow.activeEffectCyclone(true);
    }
    
    /**相机移动 */
    private bool cameraMoveFinish = false;
    //相机的位置xyz变化 【每秒变化量，最小值，最大值】
    private float[] cpcs = {
        //运动中
        6, 0, 0.4f,
        6, 0, 0.2f,
        -18f, -1 - Mathf.Clamp(Arrow.speed / 20 * 6, 0, 6), 0,
        //击中后
        -3.5f, -0.6f, 0.4f,
        -3.5f, 0.1f, 0.2f,
        30, -1 - Mathf.Clamp(Arrow.speed / 20 * 6, 0, 6), -0.8f
    };

    public override void Update() {
        if (cameraMoveFinish) {
            return;
        }
        Transform cameraT = this.arrowCamera.transform;
        Vector3 cameraPosition = cameraT.localPosition;
        if (this.arrowCamera.arrow.isHit) {
            cameraPosition.x = Mathf.Clamp(cameraPosition.x + this.cpcs[9] * Time.deltaTime, this.cpcs[10], this.cpcs[11]);
            cameraPosition.y = Mathf.Clamp(cameraPosition.y + this.cpcs[12] * Time.deltaTime, this.cpcs[13], this.cpcs[14]);
            cameraPosition.z = Mathf.Clamp(cameraPosition.z + this.cpcs[15] * Time.deltaTime, this.cpcs[16], this.cpcs[17]);
            float d = Vector3.Distance(cameraPosition, new Vector3(
                this.cpcs[9] < 0 ? this.cpcs[10]: this.cpcs[11], 
                this.cpcs[12] < 0 ? this.cpcs[13]: this.cpcs[14], 
                this.cpcs[15] < 0 ? this.cpcs[16]: this.cpcs[17]
            ));
            if (d < 0.001f) {
                cameraMoveFinish = true;
                Sequence seq = DOTween.Sequence();
                seq.AppendInterval(2.2f);
                seq.AppendCallback(delegate() {
                    this.arrowCamera.arrow.nextShoot();
                    this.arrowCamera.arrow.enabled = false;
                    GameObject.Destroy(this.arrowCamera.gameObject);
                });
            }
        } else {
            cameraPosition.x = Mathf.Clamp(cameraPosition.x + this.cpcs[0] * Time.deltaTime, this.cpcs[1], this.cpcs[2]);
            cameraPosition.y = Mathf.Clamp(cameraPosition.y + this.cpcs[3] * Time.deltaTime, this.cpcs[4], this.cpcs[5]);
            cameraPosition.z = Mathf.Clamp(cameraPosition.z + this.cpcs[6] * Time.deltaTime, this.cpcs[7], this.cpcs[8]);
        }
        cameraT.localPosition = cameraPosition;
        cameraT.LookAt(this.arrowCamera.arrow.transform.Find("Head"));
    }
}
class ArrowCameraTemplate {
    public ArrowCamera arrowCamera;
    public ArrowCameraTemplate(ArrowCamera arrowCamera)
    {
        this.arrowCamera = arrowCamera;
    }
    public virtual void Update() {}
}

// public class ArrowCamera : MonoBehaviour
// {
//     public Arrow arrow;

//     void FixedUpdate()
//     {
//         updateMoveCamera(); 
//     }

//     /**相机移动 */
//     private Vector3 cameraPosition = new Vector3();
//     private bool cameraMoveFinish = false;
//     //相机的位置xyz变化 【每秒变化量，最小值，最大值】
//     private float[] cpcs = {
//         //运动中
//         0, 0, 0,
//         1.5f, 0, 0.25f,
//         -7, -1.5f, 0,
//         //击中后
//         -3.5f, -1.2f, 0,
//         -3.5f, 0, 0.5f,
//         7, -1.5f, -1.5f
//     };

//     private void updateMoveCamera() {
//         if (cameraMoveFinish) {
//             return;
//         }
//         Transform cameraT = this.transform;
//         cameraPosition.x = cameraT.localPosition.x;
//         cameraPosition.y = cameraT.localPosition.y;
//         cameraPosition.z = cameraT.localPosition.z;
//         if (arrow.isHit) {
//             cameraPosition.x = Mathf.Clamp(cameraPosition.x + this.cpcs[9] * Time.deltaTime, this.cpcs[10], this.cpcs[11]);
//             cameraPosition.y = Mathf.Clamp(cameraPosition.y + this.cpcs[12] * Time.deltaTime, this.cpcs[13], this.cpcs[14]);
//             cameraPosition.z = Mathf.Clamp(cameraPosition.z + this.cpcs[15] * Time.deltaTime, this.cpcs[16], this.cpcs[17]);
//             float d = Vector3.Distance(cameraPosition, new Vector3(
//                 this.cpcs[9] < 0 ? this.cpcs[10]: this.cpcs[11], 
//                 this.cpcs[12] < 0 ? this.cpcs[13]: this.cpcs[14], 
//                 this.cpcs[15] < 0 ? this.cpcs[16]: this.cpcs[17]
//             ));
//             if (d < 0.001f) {
//                 cameraMoveFinish = true;
//                 Sequence seq = DOTween.Sequence();
//                 seq.AppendInterval(1.0f);
//                 seq.AppendCallback(delegate() {
//                     arrow.nextShoot();
//                     Destroy(cameraT.gameObject);
//                     this.enabled = false;
//                 });
//             }
//         } else {
//             cameraPosition.x = Mathf.Clamp(cameraPosition.y + this.cpcs[0] * Time.deltaTime, this.cpcs[1], this.cpcs[2]);
//             cameraPosition.y = Mathf.Clamp(cameraPosition.y + this.cpcs[3] * Time.deltaTime, this.cpcs[4], this.cpcs[5]);
//             cameraPosition.z = Mathf.Clamp(cameraPosition.z + this.cpcs[6] * Time.deltaTime, this.cpcs[7], this.cpcs[8]);
//         }
//         cameraT.localPosition = cameraPosition;
//         cameraT.LookAt(arrow.transform.Find("Head"));
//     }
// }