218 lines
7.9 KiB
Plaintext
218 lines
7.9 KiB
Plaintext
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// ***********************************************************************
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// Author : Kimch
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// Created : 2018-7-1
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// Description : 角色Shader
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// Last Modified By : Kimch
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// Last Modified On : 2019-7-1
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// ***********************************************************************
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// <copyright file= "MY_PBS_Hair" company="kk"></copyright>
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// ***********************************************************************
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Shader "MY/Hair"
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{
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Properties
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{
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_MainColor("Main Color", Color) = (1,1,1,1)
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_MainTex("Diffuse (RGB) Alpha (A)", 2D) = "white" {}
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_MainTexScale("MainTex Scale", Range(0, 1)) = 1.0
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_NormalTex("Normal Map", 2D) = "Black" {}
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_NormalScale("Normal Scale", Range(0, 1)) = 1.0
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_AnisoDir("Specular Shift(G),Specular Mask (B)", 2D) = "white" {}
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_SpecDetalScale("Specular Detal Scale", Range(0, 1)) = 1.0
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_ShiftScale("Shift Scale", Range(0, 3)) = 1.0
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_LightDirScale("LightDir Scale", Range(-10, 10)) = 1.0
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_LightDirScale2("LightDir Scale2", Range(-10, 10)) = 1.0
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[Header(Shift)]
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_PrimarySpecularColor("Primary Specular", Color) = (1,1,1,1)
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_PrimarySpecularShift("Primary Specular Shift", Range(-4, 1)) = 0.0
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_PrimarySpecularScale("Primary Specular Scale", Range(0, 5)) = 1.0
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_PrimarySpecularMultiplier("Primary Specular Multiplier", Range(0, 1000)) = 100.0
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_SecondarySpecularColor("Secondary Specular", Color) = (0.5,0.5,0.5,1)
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_SecondarySpecularShift("Secondary Specular Shift", Range(-4, 1)) = 0.7
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_SecondarySpecularScale("Secondary Specular Scale", Range(0, 5)) = 1.0
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_SecondarySpecularMultiplier("Secondary Specular Multiplier", Range(0, 1000)) = 100.0
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[Header(Light)]
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//_Unlitness("Unlitness", Range(0.0, 1.0)) = 0.5
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_UnlitnessScale("light Scale", Range(0.0, 1.0)) = 1.0
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[HideInInspector][Enum(UnityEngine.Rendering.CullMode)] _Cull("Cull Mode", Float) = 2
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[HideInInspector] _ZOffset("__ZOffset", Float) = 0.0
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[HideInInspector] _ZDepth("__ZDepth", Float) = 0.0
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_DiffCubeIBL("Custom Diffuse Cube", Cube) = "black" {}
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_DiffCubeIBLScale("Diff Cube IBL Scale", Range(0.0,0.3)) = 0.2
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[Toggle] _ALPHATEST("ALPHA TEST ON", Int) = 0
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_Cutoff("Alpha cutoff", Range(0,1)) = 0.5
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}
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SubShader
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{
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//在半透明之前渲染
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Tags {"Queue" = "AlphaTest+100" "IgnoreProjector" = "True" "RenderType" = "TransparentCutout"}
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//Pass
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//{
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// ZWrite On //写入深度，被遮挡的像素在下个Pass将不能通过深度测试
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// ColorMask 0 //不输出颜色
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//}
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Pass
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{
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Tags { "LightMode" = "ForwardBase" }
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Offset[_ZOffset],[_ZDepth]
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ZWrite on
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Cull back //[_Cull]
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Blend SrcAlpha OneMinusSrcAlpha
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CGPROGRAM
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#pragma shader_feature _ALPHATEST_ON
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#pragma target 3.0
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#pragma vertex vert
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#pragma fragment frag
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#include "Lighting.cginc"
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//#define _HORIZONTAL_TANGENT
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sampler2D _MainTex, _AnisoDir,_NormalTex;
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float4 _MainTex_ST, _AnisoDir_ST,_NormalTex_ST;
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half _NormalScale;
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half4 _MainColor, _PrimarySpecularColor, _SecondarySpecularColor;
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half _PrimarySpecularShift, _PrimarySpecularScale, _PrimarySpecularMultiplier;
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half _SecondarySpecularScale, _SecondarySpecularShift, _SecondarySpecularMultiplier;
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half _Unlitness,_UnlitnessScale, _SpecDetalScale, _MainTexScale, _ShiftScale;
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samplerCUBE _DiffCubeIBL;
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float _DiffCubeIBLScale;
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float _LightDirScale;
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float _LightDirScale2;
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half _Cutoff;
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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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float4 uv : TEXCOORD0;
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float4 tSpace0 : TEXCOORD1;
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float4 tSpace1 : TEXCOORD2;
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float4 tSpace2 : TEXCOORD3;
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float4 vertex : SV_POSITION;
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};
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//获取头发高光
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fixed StrandSpecular(fixed3 T, fixed3 V, fixed3 L, fixed exponent)
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{
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fixed3 H = normalize(L + V);
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fixed dotTH = dot(T, H);
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fixed sinTH = sqrt(1 - dotTH * dotTH);
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fixed dirAtten = smoothstep(-1, 0, dotTH);
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return dirAtten * pow(sinTH, exponent);
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}
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//沿着法线方向调整Tangent方向
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fixed3 ShiftTangent(fixed3 T, fixed3 N, fixed shift)
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{
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return normalize(T + shift * N);
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}
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v2f vert(appdata_full v)
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{
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v2f o;
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UNITY_INITIALIZE_OUTPUT(v2f,o);
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv.xy = TRANSFORM_TEX(v.texcoord, _MainTex);
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o.uv.zw = TRANSFORM_TEX(v.texcoord, _NormalTex);
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float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
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fixed3 worldNormal = UnityObjectToWorldNormal(v.normal);
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fixed3 worldTangent = UnityObjectToWorldDir(v.tangent.xyz);
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fixed3 worldBinormal = cross(worldNormal, worldTangent) * v.tangent.w;
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o.tSpace0 = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x);
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o.tSpace1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
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o.tSpace2 = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
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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 albedo = tex2D(_MainTex, i.uv);
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#ifdef _ALPHATEST_ON
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clip(albedo.a - _Cutoff);
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#endif
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half3 albedorgb = lerp(albedo.rgb, fixed3(1, 1, 1), _MainTexScale);
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half3 diffuseColor = albedorgb * _MainColor.rgb;
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//法线相关
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fixed3 bump = UnpackScaleNormal(tex2D(_NormalTex, i.uv.zw),_NormalScale);
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fixed3 worldNormal = normalize(half3(dot(i.tSpace0.xyz, bump), dot(i.tSpace1.xyz, bump), dot(i.tSpace2.xyz, bump)));//normalize(half3(i.tSpace0.z, i.tSpace1.z, i.tSpace2.z));//
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float3 worldPos = float3(i.tSpace0.w, i.tSpace1.w, i.tSpace2.w);
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fixed3 worldTangent = normalize(half3(i.tSpace0.x, i.tSpace1.x, i.tSpace2.x));
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fixed3 worldBinormal = normalize(half3(i.tSpace0.y, i.tSpace1.y, i.tSpace2.y));
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fixed3 worldViewDir = normalize(UnityWorldSpaceViewDir(worldPos));
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fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(worldPos));
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fixed3 worldLightDir2 = worldLightDir;
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worldLightDir.y *= _LightDirScale2;
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worldLightDir2.y *= _LightDirScale;
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float4 texcoord;
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texcoord.xy = TRANSFORM_TEX(i.uv, _AnisoDir);
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fixed3 spec = tex2D(_AnisoDir, texcoord.xy).rgb;//i.uv
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//计算切线方向的偏移度
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half shiftTex = spec.g * _ShiftScale;// * 0.6 调节平滑程度
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#ifdef _HORIZONTAL_TANGENT
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half3 t1 = ShiftTangent(worldTangent, worldNormal, _PrimarySpecularShift + shiftTex);
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half3 t2 = ShiftTangent(worldTangent, worldNormal, _SecondarySpecularShift + shiftTex);
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#else
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half3 t1 = ShiftTangent(worldBinormal, worldNormal, _PrimarySpecularShift + shiftTex);
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half3 t2 = ShiftTangent(worldBinormal, worldNormal, _SecondarySpecularShift + shiftTex);
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#endif
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//计算高光强度
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half3 spec1 = StrandSpecular(t1, worldViewDir, worldLightDir, _PrimarySpecularMultiplier)* _PrimarySpecularColor + StrandSpecular(t1, worldViewDir, worldLightDir2, _PrimarySpecularMultiplier)* _PrimarySpecularColor;
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half3 spec2 = StrandSpecular(t2, worldViewDir, worldLightDir, _SecondarySpecularMultiplier)* _SecondarySpecularColor + StrandSpecular(t2, worldViewDir, worldLightDir2, _SecondarySpecularMultiplier)* _SecondarySpecularColor;
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fixed4 finalColor = fixed4(0, 0, 0, 1);// fixed4(diffuseColor.rgb, albedo.a);//
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finalColor.rgb += spec1 * _PrimarySpecularScale;//第一层高光
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finalColor.rgb += spec2 * _SecondarySpecularScale;
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finalColor.rgb *= spec.r*_SpecDetalScale*spec.b;//高光细节
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//受灯光影响
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float NdotL = saturate(dot(worldNormal, worldLightDir));
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half3 diff = saturate(lerp(0.25, 1, NdotL));
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diff = diff * diffuseColor * _LightColor0.rgb * _UnlitnessScale;
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half3 ambient = fixed3(0.0, 0.0, 0.0); //UNITY_LIGHTMODEL_AMBIENT.xyz * 0.5;
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half3 diffIBL = texCUBE(_DiffCubeIBL, worldNormal);//不能使用blurredWorldNormal，因为blurredWorldNormal不连续平滑，会导致最终效果出现波纹！！
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ambient = diffIBL * _DiffCubeIBLScale * _LightColor0.rgb;
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fixed4 c;
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c.rgb = diffuseColor * 0.5 + diff + finalColor + ambient * 1.3;
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//c.rgb = diffuseColor + finalColor + ambient*1.3;
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#ifdef _ALPHATEST_ON
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c.a = albedo.a;
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#else
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c.a = 1;
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#endif
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return c;
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};
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ENDCG
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}
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}
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FallBack "Mobile/VertexLit"
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}
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