93 lines
2.0 KiB
Plaintext
93 lines
2.0 KiB
Plaintext
Shader "Hidden/Griffin/SubDivPainter"
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{
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Properties
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{
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_MainTex ("MainTex", 2D) = "black" {}
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_Mask ("Mask", 2D) = "white" {}
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_Opacity ("Opacity", Float) = 1
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_TerrainMask("TerrainMask", 2D) = "black"{}
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}
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CGINCLUDE
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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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float4 localPos : TEXCOORD1;
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};
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sampler2D _MainTex;
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float4 _MainTex_TexelSize;
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sampler2D _Mask;
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float _Opacity;
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sampler2D _TerrainMask;
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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 = v.uv;
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o.localPos = v.vertex;
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return o;
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}
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fixed4 fragAdd(v2f i) : SV_Target
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{
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float terrainMask = 1 - tex2D(_TerrainMask, i.localPos).r;
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float4 maskColor = tex2D(_Mask, i.uv);
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float4 currentColor = tex2D(_MainTex, i.localPos);
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float4 desColor = currentColor + maskColor*_Opacity*terrainMask;
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float value = desColor.b;
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return saturate(float4(currentColor.r, currentColor.g, value, currentColor.a));
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}
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fixed4 fragSub(v2f i) : SV_Target
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{
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float terrainMask = 1 - tex2D(_TerrainMask, i.localPos).r;
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float4 maskColor = tex2D(_Mask, i.uv);
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float4 currentColor = tex2D(_MainTex, i.localPos);
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float4 desColor = currentColor - maskColor*_Opacity*terrainMask;
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float value = desColor.b;
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return saturate(float4(currentColor.r, currentColor.g, value, currentColor.a));
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}
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ENDCG
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SubShader
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{
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Tags { "RenderType"="Transparent" }
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Pass
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{
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Name "Add"
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Blend One Zero
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BlendOp Add
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment fragAdd
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ENDCG
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}
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Pass
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{
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Name "Sub"
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Blend One Zero
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BlendOp Add
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment fragSub
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ENDCG
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}
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}
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}
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