JJBB/Assets/Project/Script/Shader/CameraRadialBlur.cs

using Module.Log;
using UnityEngine;

public class CameraRadialBlur : MonoBehaviour
{
    public Material blurMaterial;
    public float enterTime = 1f;
    public float exitTime = 1f;
    private int _width;
    private int _height;
    private float _startTime;
    private Material _instance;
    private int _layerMask;
    private Camera _camera;
    private RenderTexture _source;
    private bool _init;
    private bool _exit;

    private void OnEnable()
    {
        if (_init)
        {
            if (!SystemInfo.supportsImageEffects)
            {
                LogModule.DebugLog("Disabling the RadialBlur. Image effects are not supported");
                enabled = false;
            }
            else if (_camera == null)
                enabled = false;
            else
            {
                _width = Screen.width;
                _height = Screen.height;
                if (!PlayerPreferenceData.SystemQualityHighResolution)
                {
                    _width /= 2;
                    _height /= 2;
                }
                _startTime = Time.time;
                _instance = new Material(blurMaterial);
                _source = RenderTexture.GetTemporary(_width, _height, 24, RenderTextureFormat.ARGB32);
                _camera.targetTexture = _source;
                _camera.Render();
                _camera.targetTexture = null;
                //_exit = false;
                _exit = true;
            }
        }
    }

    private void Start ()
    {
        if (_camera == null)
            _camera = GetComponent<Camera>();
        _init = true;
        OnEnable();
    }

    public void Exit()
    {
        _exit = true;
    }

    private void OnDisable()
    {
        if (!GameManager.applicationQuit)
        {
            if (_instance != null)
            {
                Destroy(_instance);
                _instance = null;
            }
            if (_source != null)
            {
                RenderTexture.ReleaseTemporary(_source);
                _source = null;
            }
        }
    }

    private bool CheckMovieOver = false;
    private void Update()
    {
        if (CheckMovieOver == false && SceneMovieManager.Instance.CheckPlaySceneMovie(false, 3f)) //场景过场动画的，给个2秒的延迟让其加载
        {
            _startTime = Time.time;
            return;
        }
        CheckMovieOver = true;
        if (Time.time < _startTime + enterTime)
        {
            var ratio = Mathf.Clamp01((Time.time - _startTime) / enterTime);
            _instance.SetFloat("_BlurRatio", ratio);
        }
        else if (!_exit)
            _instance.SetFloat("_BlurRatio", 1f);
        else
        {
            if (Time.time < _startTime + enterTime + exitTime)
            {
                var ratio = Mathf.Clamp01((_startTime + enterTime + exitTime - Time.time) / exitTime);
                _instance.SetFloat("_BlurRatio", ratio);
            }
            else
            {
                enabled = false;
                SceneMovieManager.Instance.PlaySceneMovie();
            }
        }
    }

    private void OnPreRender()
    {
        _layerMask = _camera.cullingMask;
        _camera.cullingMask = 0;
    }

    private void OnPostRender()
    {
        _camera.cullingMask = _layerMask;
    }

    private void OnRenderImage(RenderTexture src, RenderTexture dest)
    {
        var tempA = RenderTexture.GetTemporary(_width, _height);
        //var tempB = RenderTexture.GetTemporary(_width, _height);
        Graphics.Blit(_source, tempA, _instance);
        Graphics.Blit(tempA, dest, _instance);
        //Graphics.Blit(tempB, dest, _instance);
    }
}