unity使用屏幕后处理实现闪烁特效，创建新的shader文件过程

来源：互联网发布：红包软件代理招募编辑：程序博客网时间：2024/04/29 13:19

shader代码

Shader "FlickerEffect"{    Properties    {        _MainTex ("Texture(RGB)", 2D) = "white" {}        _FlickerColor("FlickerColor",Color)=(1,1,1,1)        _LerpLevel("LerpLevel",Range(0.0,1.0))=1.0    }    SubShader    {        Pass        {            CGPROGRAM            #pragma vertex vert_img            #pragma fragment frag            #include "UnityCG.cginc"            uniform sampler2D _MainTex;            half4 _FlickerColor;            fixed _LerpLevel;            half4 frag(v2f_img i):SV_Target            {               //如果纹理为null，就单独显示颜色               half4 renderTex=tex2D(_MainTex,i.uv);               //处理颜色，正常图层叠加  结果色=混合色 * 混合色不透明度值 + 基色 * (100% - 混合色不透明度值)。               half r=_FlickerColor.r*_FlickerColor.a+renderTex.r*(1-_FlickerColor.a);               half g=_FlickerColor.g*_FlickerColor.a+renderTex.g*(1-_FlickerColor.a);               half b=_FlickerColor.b*_FlickerColor.a+renderTex.b*(1-_FlickerColor.a);               half a= _FlickerColor.a+(1-_FlickerColor.a)*renderTex.a;               half4 targetColor=half4(r,g,b,a);               //lerp(x,y,s) return x+s(y-x)               half4 finalColor=lerp(renderTex,targetColor,_LerpLevel);               return finalColor;            }            ENDCG        }    }}

实现屏幕后处理，调用OnRenderImage，使用shader

public Material material    {        get {            if (curMaterial == null)            {                curMaterial = new Material(curShader);                curMaterial.hideFlags = HideFlags.HideAndDontSave;            }            return curMaterial;        }    } void Start () {    curShader = Shader.Find("ORG/FlickerEffect");} void OnRenderImage(RenderTexture source, RenderTexture destination)    {        if (curShader != null)        {            material.SetFloat("_LerpLevel", lerpLevel);            if (flickerTexture != null)                material.SetTexture("MainTex", flickerTexture);            material.SetColor("_FlickerColor", flickerColor);            Graphics.Blit(source, destination, material);        }        else        {            Graphics.Blit(source, destination);        }    }

使用协程实现等待执行

IEnumerator ToFlicker()    {        while (true)        {            if (remainDuration < 1)                break;            remainDuration--;            lerpLevel = remainDuration / duration;            lerpLevel = Mathf.Clamp(lerpLevel, 0, 1f);            yield return null;        }        Destroy(this);    }

unity设置打包时包含shader文件

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保存时对应的工程文件：

这里写图片描述

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