各向异性高光shader

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晃晃

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电梯直达

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发表于 2011-8-26 08:34:08 |只看该作者 |倒序浏览

这个shader可以用来做一做各种餐具的shader,下面是截图：

具体代码如下：

Shader "Bumped Anisotropic Specular" {

   Properties {

      _Color ("Main Color", Color) = (1,1,1,1)

      _MainTex ("Diffuse (RGB) Alpha (A)", 2D) = "white" {}

      _SpecularTex ("Specular (R) Gloss (G) Anisotropic Mask (B)", 2D) = "gray" {}

      _BumpMap ("Normal (Normal)", 2D) = "bump" {}

      _AnisoTex ("Anisotropic Direction (RGB)", 2D) = "bump" {}

      _AnisoOffset ("Anisotropic Highlight Offset", Range(-1,1)) = -0.2

      _Cutoff ("Alpha Cut-Off Threshold", Range(0,1)) = 0.5

   }
   SubShader{

      Tags { "RenderType" = "Opaque" }



      CGPROGRAM



         struct SurfaceOutputAniso {

               fixed3 Albedo;

               fixed3 Normal;

               fixed4 AnisoDir;

               fixed3 Emission;

               half Specular;

               fixed Gloss;

               fixed Alpha;

         };
         float _AnisoOffset, _Cutoff;

         inline fixed4 LightingAniso (SurfaceOutputAniso s, fixed3 lightDir, fixed3 viewDir, fixed atten)

         {

            fixed3 h = normalize(normalize(lightDir) + normalize(viewDir));

            float NdotL = saturate(dot(s.Normal, lightDir));
            fixed HdotA = dot(normalize(s.Normal + s.AnisoDir.rgb), h);

            float aniso = max(0, sin(radians((HdotA + _AnisoOffset) * 180)));
            float spec = saturate(dot(s.Normal, h));

            spec = saturate(pow(lerp(spec, aniso, s.AnisoDir.a), s.Gloss * 128) * s.Specular);
            fixed4 c;

            c.rgb = ((s.Albedo * _LightColor0.rgb * NdotL) + (_LightColor0.rgb * spec)) * (atten * 2);

            c.a = 1;

            clip(s.Alpha - _Cutoff);

            return c;

         }
         #pragma surface surf Aniso

         #pragma target 3.0



         struct Input

         {

               float2 uv_MainTex;

               float2 uv_AnisoTex;

         };



         sampler2D _MainTex, _SpecularTex, _BumpMap, _AnisoTex;



         void surf (Input IN, inout SurfaceOutputAniso o)

         {

            fixed4 albedo = tex2D(_MainTex, IN.uv_MainTex);

               o.Albedo = albedo.rgb;

               o.Alpha = albedo.a;

               o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_MainTex));

               fixed3 spec = tex2D(_SpecularTex, IN.uv_MainTex).rgb;

               o.Specular = spec.r;

               o.Gloss = spec.g;

               o.AnisoDir = fixed4(tex2D(_AnisoTex, IN.uv_AnisoTex).rgb, spec.b);

         }

      ENDCG

   }

   FallBack "Transparent/Cutout/VertexLit"

}