Unity3D Shader：宝石反射

Shader "Unlit/Test"
{
Properties
{
_MainColor("MainColor",COLOR)=(0,0,0,1)
[NoScaleOffset]_MainCUBE ("MainCUBE", CUBE) = "white" {}
_RefStreng("RefStreng",Range(0,2.0))=0
_Enviorenment("Enviorenment",Range(0,2.0))=0
_Emission("Emission",Range(0,2.0))=0


}
SubShader
{
Tags { "Queue"="Transparent" }
LOD 100


Pass
{
Cull Front
ZWrite Off


CGPROGRAM
#pragma vertex vert
#pragma fragment frag

#include "UnityCG.cginc"


struct appdata
{
float4 vertex : POSITION;
float3 uv : TEXCOORD0;
float3 n:NORMAL;
};


struct v2f
{
float3 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
};


samplerCUBE _MainCUBE;
float4 _MainColor;
float _Enviorenment;
float _Emission;


v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
float3 viewDir=normalize(ObjSpaceViewDir(v.vertex));
o.uv=-reflect(viewDir,v.n);
o.uv=mul(unity_ObjectToWorld,float4(o.uv,0));
return o;
}

fixed4 frag (v2f i) : SV_Target
{
float4 col=texCUBE(_MainCUBE,i.uv)*_MainColor;
float4 refColor=UNITY_SAMPLE_TEXCUBE(unity_SpecCube0,i.uv);
refColor.rgb=DecodeHDR(refColor,unity_SpecCube0_HDR);
float3 mulColor=refColor.rgb*_Enviorenment+_Emission;
col=float4(col.rgb*mulColor,1);
return col;
}
ENDCG
}
pass
{
Cull Off
ZWrite On
Blend One One


CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"


struct v2f{
float4 pos:SV_POSITION;
float3 uv:TEXCOORD0;
float rim:TEXCOORD1;
};


v2f vert(appdata_full v)
{
v2f o;
o.pos=UnityObjectToClipPos(v.vertex);
float3 viewDir=normalize(ObjSpaceViewDir(v.vertex));
o.uv=-reflect(viewDir,v.normal);
o.uv=mul(unity_ObjectToWorld,float4(o.uv,0));
o.rim=1.0-saturate(dot(v.normal,viewDir));
return o;
}
samplerCUBE _MainCUBE;
float4 _MainColor;
float _Enviorenment;
float _Emission;
float _RefStreng;

fixed4 frag(v2f i):SV_Target
{
float4 col=texCUBE(_MainCUBE,i.uv)*_MainColor;
float4 refColor=UNITY_SAMPLE_TEXCUBE(unity_SpecCube0,i.uv);
refColor.rgb=DecodeHDR(refColor,unity_SpecCube0_HDR);
float3 refColor2=refColor*_RefStreng*i.rim;
float3 mulColor=refColor*_Enviorenment+_Emission;
col=float4(refColor2+col.rgb*mulColor,1);
return col;
}
ENDCG
}
UsePass "VertexLit/SHADOWCASTER"
}

}