140 lines
4.2 KiB
GLSL
140 lines
4.2 KiB
GLSL
Shader "Custom/ArmorShader" {
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Properties {
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_Color ("Color", Color) = (1,1,1,1)
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_SpeColor ("Specular Color", Color) = (1,1,1,1)
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_MainTex ("Albedo (RGB)", 2D) = "white" {}
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//_SpecInt ("Specular intensity", Range(0,2) ) = 0.5
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//_SpecSat ("Specular saturation", Range(0,1) ) = 1.0
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_Glossiness ("Smoothness", Range(0,1)) = 0.5
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////_Shift ("shift", float) = 0.05
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_Offset ("Offset", Range(0,0.5)) = 0.0
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_Contrast ("Contrast", float) = 0.5
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[MaterialToggle] _showSpecMap("show spec map", Float) = 0
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//_SpecuColor ("Specular Color", Color) = (0,1,0,1)
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}
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SubShader {
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Tags { "RenderType"="Opaque" }
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LOD 200
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CGPROGRAM
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// Physically based Standard lighting model, and enable shadows on all light types
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#pragma surface surf StandardSpecular fullforwardshadows
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// Use shader model 3.0 target, to get nicer looking lighting
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#pragma target 3.0
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sampler2D _MainTex;
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struct Input {
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float2 uv_MainTex;
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};
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half _Glossiness;
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//float4 _SpecuColor;
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float _SpecInt;
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fixed4 _Color;
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fixed4 _SpeColor;
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float _Offset;
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float _Contrast;
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float _Shift;
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float _SpecSat;
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float _showSpecMap;
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//fixed3 Albedo; // diffuse color
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//fixed3 Specular; // specular color
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//fixed3 Normal; // tangent space normal, if written
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//half3 Emission;
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//half Smoothness; // 0=rough, 1=smooth
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//half Occlusion; // occlusion (default 1)
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// fixed Alpha; // alpha for transparencies
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float3 rgbTohsv(float3 RGB)
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{
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float3 HSV;
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float minChannel, maxChannel;
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if (RGB.x > RGB.y) {
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maxChannel = RGB.x;
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minChannel = RGB.y;
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}
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else {
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maxChannel = RGB.y;
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minChannel = RGB.x;
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}
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if (RGB.z > maxChannel) maxChannel = RGB.z;
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if (RGB.z < minChannel) minChannel = RGB.z;
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HSV.xy = 0;
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HSV.z = maxChannel;
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float delta = maxChannel - minChannel; //Delta RGB value
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if (delta != 0) { // If gray, leave H S at zero
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HSV.y = delta / HSV.z;
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float3 delRGB;
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delRGB = (HSV.zzz - RGB + 3*delta) / (6.0*delta);
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if ( RGB.x == HSV.z ) HSV.x = delRGB.z - delRGB.y;
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else if ( RGB.y == HSV.z ) HSV.x = ( 1.0/3.0) + delRGB.x - delRGB.z;
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else if ( RGB.z == HSV.z ) HSV.x = ( 2.0/3.0) + delRGB.y - delRGB.x;
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}
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return (HSV);
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}
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float3 hsvTorgb(float3 HSV)
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{
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float3 RGB = HSV.z;
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float var_h = HSV.x * 6;
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float var_i = floor(var_h); // Or ... var_i = floor( var_h )
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float var_1 = HSV.z * (1.0 - HSV.y);
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float var_2 = HSV.z * (1.0 - HSV.y * (var_h-var_i));
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float var_3 = HSV.z * (1.0 - HSV.y * (1-(var_h-var_i)));
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if (var_i == 0) { RGB = float3(HSV.z, var_3, var_1); }
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else if (var_i == 1) { RGB = float3(var_2, HSV.z, var_1); }
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else if (var_i == 2) { RGB = float3(var_1, HSV.z, var_3); }
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else if (var_i == 3) { RGB = float3(var_1, var_2, HSV.z); }
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else if (var_i == 4) { RGB = float3(var_3, var_1, HSV.z); }
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else { RGB = float3(HSV.z, var_1, var_2); }
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return (RGB);
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}
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void surf (Input IN, inout SurfaceOutputStandardSpecular o) {
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// Albedo comes from a texture tinted by color
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fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
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float lum = Luminance(c.rgb) + _Offset;
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//contrast
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lum = clamp( ((lum - 0.5f) * max(_Contrast, 0)) + 0.5f , 0.0, 1.0 );
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float3 scolHSV = rgbTohsv(_SpeColor.rgb);
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float3 colHSV = rgbTohsv(c.rgb);
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//scolHSV.z = _SpecInt;
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//scolHSV.x += _Shift;
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scolHSV.y = colHSV.y;
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if( _showSpecMap == 1 )
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{
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o.Albedo = float4(lum, lum, lum, c.a);
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o.Specular = float3(0,0,0);
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o.Smoothness = 0;
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}
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else
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{
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o.Albedo = c.rgb;
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o.Specular = hsvTorgb(scolHSV);
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o.Specular *= lum;
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o.Smoothness = _Glossiness;
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}
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o.Alpha = c.a;
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}
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ENDCG
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}
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FallBack "Diffuse"
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}
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