118 lines
2.9 KiB
Plaintext
118 lines
2.9 KiB
Plaintext
Shader "Hidden/MicroSplatMeshFXBrushApply"
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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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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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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 _BrushBuffer;
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float _BrushFlow;
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int _channel;
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float2 _EdgeBuffer;
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float _TargetValue;
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half3 _TargetColor;
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int _ControlIndex; // texture we are modifying
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sampler2D _Control0;
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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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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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fixed4 col = tex2D(_Control0, i.uv);
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// sample brush
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fixed4 brushSample = tex2D(_BrushBuffer, i.uv);
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fixed brush = brushSample.r;
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fixed edge = brushSample.g;
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brush *= _BrushFlow;
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brush = saturate(brush);
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float offset = _EdgeBuffer * 0.5;
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fixed boost = tex2D(_BrushBuffer, i.uv + float2(offset, offset)).r +
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tex2D(_BrushBuffer, i.uv + float2(-offset, -offset)).r +
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tex2D(_BrushBuffer, i.uv + float2(offset, -offset)).r +
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tex2D(_BrushBuffer, i.uv + float2(-offset, offset)).r;
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if (edge < 0.5 && boost > 0.5)
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{
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brush = boost/4.0;
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}
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float thresh = 1 / 255.0;
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if (brush > thresh)
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{
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if (_channel == 0)
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{
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col.r = lerp(col.r, _TargetValue, brush);
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}
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else if (_channel == 1)
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{
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col.g = lerp(col.g, _TargetValue, brush);
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}
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else if (_channel == 2)
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{
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col.b = lerp(col.b, _TargetValue, brush);
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}
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else if (_channel == 3)
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{
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col.a = lerp(col.a, _TargetValue, brush);
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}
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else if (_channel == 4) // displacement dampen
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{
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col.g = lerp(col.g, _TargetValue, brush);
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}
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else if (_channel == 5)
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{
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col.rgb = lerp(col.rgb, _TargetColor, brush);
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}
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}
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col = saturate(col);
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return col;
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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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