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153 行
6.3 KiB
153 行
6.3 KiB
/// author：Saber
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/// desc:角色相机泛光效果脚本
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/// 2020年2月21日优化：参考了catlikecoding的模糊思路优化逻辑提升效果，模糊rt使用局部摄像机获取到的画面进行处理
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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[ExecuteInEditMode]
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[RequireComponent(typeof(Camera))]
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public class RoleCameraBloom : MonoBehaviour
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{
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public RenderTexture cullRenderTexture; // 用来接收泛光相机的裁剪RT
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private ChangeShaderRender scr_script; // 泛光摄像机上的渲染脚本
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#region 泛光特效相关参数
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//模糊散值
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public Material bloomMaterial; // 泛光特效相关材质
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public bool render_bloom_effect = false; // 泛光特效关键参数，设置为true时会开始渲染泛光特效
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#endregion
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private bool isSupported; // 设备支持变量
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// 模糊摄像机获取到的画面依然需要做阈值处理，不过初始默认值为0
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[Range(0, 10)]
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public float threshold = 1;
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// 避免阈值附近的画面忽然点亮，这里设置一个软阈值处理阈值附近的颜色值的泛光效果
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[Range(0, 1)]
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public float softThreshold = 0.5f;
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[Range(0, 10)]
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public float intensity = 1;
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#region 渲染pass常量
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const int BoxDownPrefilterPass = 0; // 对泛光部分降采样的pass
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const int BoxDownPass = 1; // 降序采样pass
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const int BoxUpPass = 2; // 升序采样pass，最大限度利用到所有的像素颜色贡献
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const int ApplyBloomPass = 3; // 泛光颜色叠加pass
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const int DebugBloomPass = 4; // 测试pass，不叠加原颜色，只渲染泛光处理的效果
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#endregion
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[Range(1, 8)]
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public int iterations = 4; // 泛光迭代次数
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RenderTexture[] textures = new RenderTexture[8]; // 临时纹理链表
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RenderTexture currentDestination;
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RenderTexture currentSource;
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Vector4 filter; // 膝盖曲线过滤值
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public bool debug = false;
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// Start is called before the first frame update
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void Start()
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{
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// 检查平台支持，不支持则直接禁用
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isSupported = CheckSupport();
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this.enabled = isSupported;
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if(scr_script != null){
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scr_script.enabled = isSupported;
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}
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// 测试逻辑
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// TestLogic();
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}
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#region 测试逻辑
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private void TestLogic()
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{
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RenderTexture temp_render = new RenderTexture(1280, 600, 0);
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GameObject child = this.transform.GetChild(0).gameObject;
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Camera temp_camera = child.GetComponent<Camera>();
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child.AddComponent<ChangeShaderRender>();
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ChangeShaderRender temp_scr = child.GetComponent<ChangeShaderRender>();
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Shader shader = Shader.Find("SaberShader/BloomClipShader");
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temp_scr.target_shader = shader;
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SetBloomCameraData(temp_camera, temp_render, temp_scr);
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}
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#endregion
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private bool CheckSupport()
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{
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if (SystemInfo.supportsImageEffects == false)
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{
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Debug.LogWarning("当前平台不支持！");
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return false;
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}
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return true;
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}
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// Lua接口，将泛光摄像机和泛光摄像机输出的rt交给本类来控制
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public void SetBloomCameraData(Camera camera, RenderTexture rt, ChangeShaderRender change_shader_render){
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cullRenderTexture = rt;
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camera.targetTexture = cullRenderTexture;
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render_bloom_effect = true;
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scr_script = change_shader_render;
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// 效果运行与否还要看设备支不支持特效
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scr_script.enabled = isSupported;
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}
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// 正式渲染
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// 这个方法要注意在退出游戏的时候把渲染逻辑门关闭，一般情况下把render_bloom_effect置false
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void OnRenderImage(RenderTexture src, RenderTexture dest)
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{
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if (bloomMaterial != null && render_bloom_effect && cullRenderTexture != null)
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{
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// 膝盖曲线的值可以在这里预先算好
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float knee = threshold * softThreshold;
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filter.x = threshold;
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filter.y = filter.x - knee;
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filter.z = 2f * knee;
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filter.w = 0.25f / (knee + 0.00001f);
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bloomMaterial.SetVector("_Filter", filter);
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bloomMaterial.SetFloat("_Intensity", Mathf.GammaToLinearSpace(intensity));
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// 降低一次采样，将剧目摄像机的内容传递到临时的最终画面RT中
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int width = src.width / 4;
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int height = src.height / 4;
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currentDestination = textures[0] = RenderTexture.GetTemporary(width, height, 0, src.format);
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Graphics.Blit(cullRenderTexture, currentDestination, bloomMaterial, BoxDownPrefilterPass);
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currentSource = currentDestination;
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// 循环降采样，并将结果保存
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int i = 1;
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for (; i < iterations; i++) {
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width /= 2;
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height /= 2;
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if (height < 2) {
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break;
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}
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currentDestination = textures[i] =
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RenderTexture.GetTemporary(width, height, 0, src.format);
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Graphics.Blit(currentSource, currentDestination, bloomMaterial, BoxDownPass);
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currentSource = currentDestination;
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}
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// 再对降采样后的画面继续宁升采样，将每个像素的颜色平均出去
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for (i -= 2; i >= 0; i--) {
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currentDestination = textures[i];
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textures[i] = null;
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Graphics.Blit(currentSource, currentDestination, bloomMaterial, BoxUpPass);
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RenderTexture.ReleaseTemporary(currentSource);
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currentSource = currentDestination;
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}
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if (debug) {
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Graphics.Blit(currentSource, dest, bloomMaterial, DebugBloomPass);
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}
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else {
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bloomMaterial.SetTexture("_SourceTex", src);
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Graphics.Blit(currentSource, dest, bloomMaterial, ApplyBloomPass);
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}
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RenderTexture.ReleaseTemporary(currentSource);
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}
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else
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{
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Graphics.Blit(src, dest);
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}
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}
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public void ReleaseTempRes()
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{
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render_bloom_effect = false;
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if(scr_script != null)
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{
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scr_script.enabled = false;
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}
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}
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void OnDestroy(){
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ReleaseTempRes();
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}
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}
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