91 lines
2.5 KiB
Plaintext
91 lines
2.5 KiB
Plaintext
// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
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Shader "Hidden/GaiaPro/PowerOf" {
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Properties {
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//The input texture
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_InputTex ("Input Texture", any) = "" {}
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//The image mask texture
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_BrushTex ("Brush Texture", any) = "" {}
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//Flag to determine whether the Mask is inverted or not
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_Invert("Invert Distance Mask", Int) = 0
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//Power function to be applied
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_Power("Strength", Float) = 1
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//Strength from 0 to 1 to determine how "strong" the image mask effect is applied
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_Strength ("Strength", Float) = 0
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}
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SubShader {
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ZTest Always Cull Off ZWrite Off
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CGINCLUDE
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#include "UnityCG.cginc"
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#include "TerrainTool.cginc"
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sampler2D _InputTex;
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sampler2D _BrushTex;
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int _Invert;
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float _Power;
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float _Strength;
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float4 _MainTex_TexelSize; // 1/width, 1/height, width, height
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struct appdata_t {
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float4 vertex : POSITION;
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float2 pcUV : TEXCOORD0;
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};
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struct v2f {
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float4 vertex : SV_POSITION;
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float2 pcUV : TEXCOORD0;
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};
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v2f vert(appdata_t 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.pcUV = v.pcUV;
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return o;
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}
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ENDCG
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Pass // 0 Power Of
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{
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Name "Power Of"
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment FilterPowerOf
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float4 FilterPowerOf(v2f i) : SV_Target
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{
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float height = UnpackHeightmap(tex2D(_InputTex, i.pcUV));
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float powerOfHeight = pow(height,4.0f-_Power);
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// out of bounds multiplier
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float2 brushUV = PaintContextUVToBrushUV(i.pcUV);
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float2 heightmapUV = PaintContextUVToHeightmapUV(i.pcUV);
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float oob = all(saturate(brushUV) == brushUV) ? 1.0f : 0.0f;
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float brushStrength = oob * UnpackHeightmap(tex2D(_BrushTex, brushUV));
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//noise = ((noise - 0.5f) * _ContrastFilter) + 0.5f;
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//if (_Invert > 0)
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//{
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// powerOfHeight = (1.0f - powerOfHeight);
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//}
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//return PackHeightmap(height + height * (powerOfHeight-height));
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return PackHeightmap(lerp(height, powerOfHeight, brushStrength));
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//return PackHeightmap(lerp(height,(height * powerOfHeight),_Strength));
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}
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ENDCG
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}
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}
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Fallback Off
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}
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