59 lines
1.4 KiB
Plaintext
59 lines
1.4 KiB
Plaintext
Shader "Hidden/Griffin/ChannelToGrayscale"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_ChannelIndex ("Channel Index", Int) = 0
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}
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SubShader
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{
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Tags { "RenderType"="Transparent" }
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LOD 100
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ZTest Always
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ZWrite Off
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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float _ChannelIndex;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = TRANSFORM_TEX(v.uv, _MainTex);
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return o;
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}
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float4 frag (v2f i) : SV_Target
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{
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float4 col = tex2D(_MainTex, i.uv);
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float value = col.r*(_ChannelIndex==0) + col.g*(_ChannelIndex==1) + col.b*(_ChannelIndex==2) + col.a*(_ChannelIndex==3);
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float4 result = float4(value, value, value, 1);
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return result;
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}
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ENDCG
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}
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}
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}
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