70 lines
1.7 KiB
Plaintext
70 lines
1.7 KiB
Plaintext
Shader "Unlit/BlackAreaBlit"
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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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_MaskTex ("Mask Texture", 2D) = "white" {}
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}
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SubShader
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{
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Tags {
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"RenderType" = "Opaque"
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"RenderPipeline" = "UniversalPipeline"
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}
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LOD 100
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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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sampler2D _MaskTex;
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float4 _MaskTex_ST;
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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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fixed4 frag (v2f i) : SV_Target
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{
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// sample the texture
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fixed4 col = tex2D(_MainTex, i.uv);
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fixed4 mask = tex2D(_MaskTex, i.uv);
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fixed4 black = fixed4(0, 0, 0, 1);
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float minAlpha = 0.02;
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if (mask.r > minAlpha)
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{
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float scale = mask.r * 1;
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scale = min(scale, 1);
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scale = max(scale, minAlpha);
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return col * scale;
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}
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return col * minAlpha;
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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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