IOS metal 编辑器玻璃材质

素颜马尾好姑娘i 2022-06-02 01:45 176阅读 0赞

#include<metal_stdlib>
    
    float4 zfs(float zsl,float3 surfaceNormal,float3 surfaceView,texturecube<float> cubeTexture,sampler cubeSampler)
    {
        float4 finalColorZS=float4(1.0,1.0,1.0,0.0);
        float4 finalColorFS=float4(1.0,1.0,1.0,0.0);
        float4 finalColor=float4(1.0,1.0,1.0,0.0);
        float3 vTextureCoord=float3(1.0,1.0,1.0);
        //texturecube<float> cubeTexture;
        const float maxH=0.7;
        const float minH=0.2;
        float sizeH=maxH-minH;
        float3 eyeDirection=normalize(-surfaceView);
        float testValue=abs(dot(eyeDirection,surfaceNormal));
        if(testValue>maxH)
        {
            vTextureCoord=refract(-eyeDirection,surfaceNormal,zsl);
            finalColor=cubeTexture.sample(cubeSampler,vTextureCoord);
        }else if(testValue<=maxH&&testValue>=minH)
        {
            vTextureCoord=reflect(-eyeDirection,surfaceNormal);
            finalColorFS=cubeTexture.sample(cubeSampler,vTextureCoord);
            vTextureCoord=refract(-eyeDirection,surfaceNormal,zsl);
            finalColorZS=cubeTexture.sample(cubeSampler,vTextureCoord);
            float ratio=(testValue-minH)/sizeH;
            finalColor=finalColorZS*ratio+(1.0-ratio)*finalColorFS;
            
        }else
        {
            vTextureCoord=reflect(-eyeDirection,surfaceNormal);
            finalColorFS=cubeTexture.sample(cubeSampler,vTextureCoord);
        }
       
        return finalColor;
    }
    #pragma arguments
    texturecube<float> cubeTexture;
    #pragma transparent
    #pragma body
    constexpr sampler s(filter::linear,mip_filter::linear);
    _output.color.r=zfs(0.97,_surface.normal,_surface.view,cubeTexture,s).r;
    _output.color.g=zfs(0.955,_surface.normal,_surface.view,cubeTexture,s).g;
    _output.color.b=zfs(0.94,_surface.normal,_surface.view,cubeTexture,s).b;

[本文地址：http://blog.csdn.net/sh15285118586/article/details/78932279][http_blog.csdn.net_sh15285118586_article_details_78932279]

[http_blog.csdn.net_sh15285118586_article_details_78932279]: http://blog.csdn.net/sh15285118586/article/details/78932279