双面渲染

Shader "Custom/AlphaVerList双面渲染" {
Properties {
_Color ("Main Color", Color) = (1,1,1,1)
_SpecColor ("Spec Color", Color) = (1,1,1,0)
_Emission ("Emissive Color", Color) = (0,0,0,0)
_Shininess ("Shininess", Range (0.1, 1)) = 0.7
_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
}

// 2/3 texture stage GPUs
SubShader {
Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
LOD 100

// Non-lightmapped  
Pass {  
    Tags { "LightMode" = "Vertex" }  
    Alphatest Greater [_Cutoff]  
    AlphaToMask True  
    ColorMask RGB  
    Material {  
        Diffuse [_Color]  
        Ambient [_Color]  
        Shininess [_Shininess]  
        Specular [_SpecColor]  
        Emission [_Emission]      
    }  
    Cull Off  
    Lighting On  
    SeparateSpecular On  
    SetTexture [_MainTex] {  
        Combine texture * primary DOUBLE, texture * primary   
    }   
}  
  
// Lightmapped, encoded as dLDR  
Pass {  
    Tags { "LightMode" = "VertexLM" }  
    Alphatest Greater [_Cutoff]  
    AlphaToMask True  
    ColorMask RGB  
    Cull Off  
      
    BindChannels {  
        Bind "Vertex", vertex  
        Bind "normal", normal  
        Bind "texcoord1", texcoord0 // lightmap uses 2nd uv  
        Bind "texcoord", texcoord1 // main uses 1st uv  
    }  
    SetTexture [unity_Lightmap] {  
        matrix [unity_LightmapMatrix]  
        constantColor [_Color]  
        combine texture * constant  
    }  
    SetTexture [_MainTex] {  
        combine texture * previous DOUBLE, texture * primary  
    }  
}  
  
// Lightmapped, encoded as RGBM  
Pass {  
    Tags { "LightMode" = "VertexLMRGBM" }  
    Alphatest Greater [_Cutoff]  
    AlphaToMask True  
    ColorMask RGB  
    Cull Off  
      
    BindChannels {  
        Bind "Vertex", vertex  
        Bind "normal", normal  
        Bind "texcoord1", texcoord0 // lightmap uses 2nd uv  
        Bind "texcoord1", texcoord1 // unused  
        Bind "texcoord", texcoord2 // main uses 1st uv  
    }  
      
    SetTexture [unity_Lightmap] {  
        matrix [unity_LightmapMatrix]  
        combine texture * texture alpha DOUBLE  
    }  
    SetTexture [unity_Lightmap] {  
        constantColor [_Color]  
        combine previous * constant  
    }  
    SetTexture [_MainTex] {  
        combine texture * previous QUAD, texture * primary  
    }  
}  
  
// Pass to render object as a shadow caster  
Pass {  
    Name "Caster"  
    Tags { "LightMode" = "ShadowCaster" }  
    Offset 1, 1  
    Cull Off  

    Fog {Mode Off}  
    ZWrite On ZTest LEqual Cull Off  

CGPROGRAM

pragma vertex vert

pragma fragment frag

pragma multi_compile_shadowcaster

pragma fragmentoption ARB_precision_hint_fastest

include "UnityCG.cginc"

struct v2f {
V2F_SHADOW_CASTER;
float2 uv : TEXCOORD1;
};

uniform float4 _MainTex_ST;

v2f vert( appdata_base v )
{
v2f o;
TRANSFER_SHADOW_CASTER(o)
o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
return o;
}

uniform sampler2D _MainTex;
uniform fixed _Cutoff;
uniform fixed4 _Color;

float4 frag( v2f i ) : COLOR
{
fixed4 texcol = tex2D( _MainTex, i.uv );
clip( texcol.a*_Color.a - _Cutoff );

SHADOW_CASTER_FRAGMENT(i)  

}
ENDCG

}  
  
// Pass to render object as a shadow collector  
Pass {  
    Name "ShadowCollector"  
    Tags { "LightMode" = "ShadowCollector" }  
    Cull Off  

    Fog {Mode Off}  
    ZWrite On ZTest LEqual  

CGPROGRAM

pragma vertex vert

pragma fragment frag

pragma fragmentoption ARB_precision_hint_fastest

pragma multi_compile_shadowcollector

define SHADOW_COLLECTOR_PASS

include "UnityCG.cginc"

struct v2f {
V2F_SHADOW_COLLECTOR;
float2 uv : TEXCOORD5;
};

uniform float4 _MainTex_ST;

v2f vert (appdata_base v)
{
v2f o;
TRANSFER_SHADOW_COLLECTOR(o)
o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
return o;
}

uniform sampler2D _MainTex;
uniform fixed _Cutoff;
uniform fixed4 _Color;

fixed4 frag (v2f i) : COLOR
{
fixed4 texcol = tex2D( _MainTex, i.uv );
clip( texcol.a*_Color.a - _Cutoff );

SHADOW_COLLECTOR_FRAGMENT(i)  

}
ENDCG

}  

}

// 1 texture stage GPUs
SubShader {
Tags {"IgnoreProjector"="True" "RenderType"="TransparentCutout"}
LOD 100

Pass {  
    Tags { "LightMode" = "Always" }  
    Alphatest Greater [_Cutoff]  
    AlphaToMask True  
    ColorMask RGB  
    Material {  
        Diffuse [_Color]  
        Ambient [_Color]  
        Shininess [_Shininess]  
        Specular [_SpecColor]  
        Emission [_Emission]      
    }  
    Cull Off  

    Lighting On  
    SeparateSpecular On  
    SetTexture [_MainTex] {  
        Combine texture * primary DOUBLE, texture * primary   
    }  
}     

}

}