unity3d建筑玻璃shader代码

晃晃

Shader "Building/Glass" {

Properties {

_Lightmap ("Lightmap (RGB) Reflectiveness (A)", 2D) = "black" {}

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

_Cube ("Reflection Cubemap", Cube) = "" { TexGen CubeReflect }

}

  

Category {

Tags { "Queue" = "Transparent-110" }

Blend SrcAlpha OneMinusSrcAlpha

Lighting Off

Colormask RGB

  

// ---- fragment program cards

SubShader {

Pass {

  

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma fragmentoption ARB_fog_exp2

#pragma fragmentoption ARB_precision_hint_fastest

#include "UnityCG.cginc"

  

struct v2f {

V2F_POS_FOG;

float3 normal;

float3 viewDir;

float3 rotNormal;

float2 uv;

};

  

uniform float4x4 _RotMatrix;

uniform float4 _Lightmap_ST;

  

v2f vert (appdata_tan v)

{

v2f o;

PositionFog( v.vertex, o.pos, o.fog );

o.normal = mul( (float3x3)_Object2World, v.normal );

o.rotNormal = mul( (float3x3)_RotMatrix, o.normal );

o.viewDir = mul( (float3x3)_Object2World, ObjSpaceViewDir(v.vertex) );

o.uv = TRANSFORM_TEX(v.texcoord, _Lightmap);

return o;

}

  

uniform samplerCUBE _Cube;

uniform float4 _Color;

uniform sampler2D _Lightmap;

  

float4 frag (v2f i) : COLOR

{

float3 normal = i.normal;

i.viewDir = normalize(i.viewDir);

half nsv = saturate(dot( normal, i.viewDir ));

  

// calculate reflection vector in world space

half3 r = reflect(-i.viewDir, i.rotNormal);

  

half4 lightmapColor = tex2D(_Lightmap, i.uv);

half4 reflcolor = texCUBE(_Cube, r);

  

half fresnel = 1 - nsv*0.5;

half fresnelAlpha = 1 - nsv * (1 - _Color.a);

half4 c = half4( lerp( _Color.rgb, reflcolor.rgb, fresnel * lightmapColor.a ), fresnelAlpha );

  

c.rgb *= lightmapColor.rgb;

  

return c;

}

ENDCG

}

}

  

// ---- cards that can do cube maps

SubShader {

Pass {

SetTexture [_Cube] { matrix[_RotMatrix] constantColor(1,1,1,0.5) combine texture, constant }

}

}

  

// ---- cards that can't do anything

SubShader {

Pass {

Color (1,1,1,0.3)

}

}

}

  

}

Asen

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