自言自语

shader的能做的效果太多，又学习一种方法做了个效果。但总感觉不是那么回事儿。。先笔记下吧

又更新了一下调整修改了一些计算让这个看起来更好一点我是觉得更好了一点上图存档

一、效果

第一版效果

第二版效果

二、Shder

4.15更新后的shader

Shader "TNShaderPractise/ShaderPractise_Jade_BackLight"
{Properties{     [Header(Textures   IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII)][Space(8)]_MainTex ("Texture", 2D) = "white" {}_NormalMap ("NormalMap",2D)="bump"{}_ThickMap("ThickMap",2D)="white"{}[Space(8)][Header(Colors   IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII)][Space(8)][HDR]_MainColor("Main Color", Color)=(1,1,1,1)[HDR]_BackColor("BackColor Color", Color)=(1,1,1,1)[Spece(8)][Header(Parameters   IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII)][Space(8)]_ThickMapIntensity("ThickMapIntensity",Float)=1[Toggle(_ThickMapInvert)]_ThickMapInvert("ThickMapInvert",Float)=0_NormalIntensity("NormalIntensity",Float)=1_dis("distor",Range(0,1))=0_Pow("Pow",Range(0.05,10))=5_Value("Value",Range(0,10))=1//只是为了面板上能分块明显点.....[Space(8)][Header(MatCap   IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII)][Space(8)]_MatCap("MatCapSpecular",2D) ="black"{}[HDR]_MatCapColor("_MatCapColor",Color) =(1,1,1,1)_Roughness("Roughness",Range(0.02,1)) =1_rotation("Rotation",Range(0,360))=0}SubShader{Tags { "RenderType"="Opaque" "Queue" = "Geometry"  }Pass{Tags {  "LightMode" = "ForwardBase" }CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma multi_compile_fwdbase#include "AutoLight.cginc"#include "UnityCG.cginc"#include "Lighting.cginc"struct a2v{float4 vertex : POSITION;float3 normal : NORMAL;float4 tangent : TANGENT;float2 texcoord : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;float4 pos : SV_POSITION;float3 posWS : TEXCOORD1;float3 nDir : TEXCOORD2;float3 tDir : TEXCOORD3;float3 bDir : TEXCOORD4;SHADOW_COORDS(5)};sampler2D _MainTex;float4 _MainTex_ST;sampler2D _ThickMap;float _ThickMapIntensity;float4 _MainColor;float4 _BackColor;sampler2D _NormalMap;float4 _NormalMap_ST;float _NormalIntensity;float _dis;float _Pow;float _Value;sampler2D _MatCap;float4 _MatCapColor;float _Roughness;float _rotation;float _ThickMapInvert;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uv = v.texcoord;o.posWS = mul(unity_ObjectToWorld,v.vertex);o.nDir = UnityObjectToWorldNormal(v.normal);o.tDir = mul(unity_ObjectToWorld,v.tangent);o.bDir = cross(o.nDir,o.tDir)*v.tangent.w;TRANSFER_SHADOW(o);return o;}fixed4 frag (v2f i) : SV_Target{//Normalhalf3 Ndir = normalize(i.nDir);half3 Tdir = normalize(i.tDir);half3 Bdir = normalize(i.bDir);float3x3 TBN = float3x3(Tdir,Bdir,Ndir);half3 bump = UnpackNormal (tex2D(_NormalMap,i.uv));bump.xy *= _NormalIntensity;bump.z = sqrt (1-saturate(dot(bump.xy,bump.xy)));          half3 normalDir = normalize(mul(bump,TBN));        //再算一套法线用于光滑度粗细度控制 不然高光太受法线影响不好看half3 bump2 = half3(bump.xy*saturate(1-_Roughness),bump2.z);bump2.z = sqrt (1-saturate(dot(bump2.xy,bump2.xy)));half3 normalDir2 = normalize(mul(bump2,TBN));    //Directionhalf3 lightDir = normalize(UnityWorldSpaceLightDir(i.posWS.xyz));half3 viewDir = normalize(UnityWorldSpaceViewDir(i.posWS.xyz));half3 reflDir = normalize(reflect(normalDir,-viewDir));//BackLight// 做了一下灯光角度偏转,显示情况中很少会有绝对水平的方向光. 后边做点光的时候需要再改回去half3 backLight = -normalize(float3(lightDir.x,lightDir.y-0.75,lightDir.z)+normalDir*_dis*0.15);half3 halfDir_back =normalize(viewDir+backLight+normalDir*_dis*0.1);//DOT Preparehalf VdotL = pow(saturate(dot(viewDir,backLight)),_Pow*20)*_Value;   half VdotLF = dot(viewDir,lightDir)*0.5+0.5;     //half NdotH_back = saturate(dot(normalDir,halfDir_back));half NdotV = saturate(dot(normalDir,viewDir));half NdotV2 = saturate(dot(normalDir2,viewDir));half NdotL = dot(normalDir,lightDir)*0.5+0.5;     //MatCaphalf3 Vnormal = normalize(mul(UNITY_MATRIX_V,normalDir2));//旋转MatCapfloat2 MatCapUV = Vnormal.xy*0.5+0.5;float cosAngle = cos (radians(_rotation));float sinAngle =sin(radians(_rotation));float2x2 rot = float2x2(cosAngle,-sinAngle,sinAngle,cosAngle);float2 center = float2(0.5,0.5);MatCapUV -= center;MatCapUV = mul(rot,MatCapUV);MatCapUV += center;//这步计算没啥道理,就自己想当然来的 float4 MatCapSpecular =tex2D(_MatCap,MatCapUV)*_MatCapColor*pow(NdotV2,_Roughness*1000);UNITY_LIGHT_ATTENUATION(atten,i,i.posWS);//ThickMap 根据实际提供的贴图 可以随意进行反向转换float4 thickness;if (_ThickMapInvert == 0){thickness = tex2D(_ThickMap,i.uv)*_ThickMapIntensity; }else{thickness = (1-tex2D(_ThickMap,i.uv))*_ThickMapIntensity; }//IndirectSpecularhalf mip =(1-_Roughness)*6;half3 envMap = DecodeHDR(UNITY_SAMPLE_TEXCUBE_LOD(unity_SpecCube0,reflDir,mip),unity_SpecCube0_HDR);//玉表面会有镜面反射，但是不会像金属和镜子一样那么清晰 所以减弱点乘以0.1 这个看个人喜好half4 indirectSpecular = float4(envMap,1)*0.1+MatCapSpecular;//sh 用SH来作为光源计算 不然没有方向光的时候会全黑float4 SH = float4(ShadeSH9(float4(normalDir,1)),1);//FinalColorfixed4 col = tex2D(_MainTex, i.uv);float4 frontCol =col*_MainColor*NdotL*_LightColor0*atten;float4 backCol =col*_BackColor*VdotL*_LightColor0*thickness;float4 finalCol =lerp(frontCol,backCol,VdotLF);float4 IBLdiff =lerp(col*_MainColor*SH,col*_BackColor*SH,1-NdotL);return finalCol += indirectSpecular+IBLdiff;}ENDCG}//AdditionalLightPass     关键在于背光Pass{Blend One OneTags {  "LightMode" = "ForwardAdd" }CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma multi_compile_fwdadd#include "AutoLight.cginc"#include "UnityCG.cginc"#include "Lighting.cginc"struct a2v{float4 vertex : POSITION;float3 normal : NORMAL;float4 tangent : TANGENT;float2 texcoord : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;float4 pos : SV_POSITION;float3 posWS : TEXCOORD1;float3 nDir : TEXCOORD2;float3 tDir : TEXCOORD3;float3 bDir : TEXCOORD4;SHADOW_COORDS(5)};sampler2D _MainTex;float4 _MainTex_ST;sampler2D _ThickMap;float _ThickMapIntensity;float4 _MainColor;float4 _SecondColor;float4 _BackColor;sampler2D _NormalMap;float4 _NormalMap_ST;float _NormalIntensity;float _dis;float _Pow;float _Value;sampler2D _MatCap;float4 _MatCapColor;float _Roughness;float _rotation;float _ThickMapInvert;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uv = v.texcoord;o.posWS = mul(unity_ObjectToWorld,v.vertex);o.nDir = UnityObjectToWorldNormal(v.normal);o.tDir = mul(unity_ObjectToWorld,v.tangent);o.bDir = cross(o.nDir,o.tDir)*v.tangent.w;TRANSFER_SHADOW(o);return o;}fixed4 frag (v2f i) : SV_Target{//Normalhalf3 Ndir = normalize(i.nDir);half3 Tdir = normalize(i.tDir);half3 Bdir = normalize(i.bDir);float3x3 TBN = float3x3(Tdir,Bdir,Ndir);half3 bump = UnpackNormal (tex2D(_NormalMap,i.uv));bump.xy *= _NormalIntensity;bump.z = sqrt (1-saturate(dot(bump.xy,bump.xy)));          half3 normalDir = normalize(mul(bump,TBN));        //再算一套法线用于光滑度粗细度控制 不然高光太受法线影响不好看half3 bump2 = half3(bump.xy*saturate(1-_Roughness),bump2.z);bump2.z = sqrt (1-saturate(dot(bump2.xy,bump2.xy)));half3 normalDir2 = normalize(mul(bump2,TBN));    //Directionhalf3 lightDir = normalize(UnityWorldSpaceLightDir(i.posWS.xyz));half3 viewDir = normalize(UnityWorldSpaceViewDir(i.posWS.xyz));half3 reflDir = normalize(reflect(normalDir,-viewDir));//BackLight// BasePass做了一下灯光角度偏转,但点光源是范围光源 不能矫正 所以要改回标准算法half3 backLight = -normalize(lightDir+normalDir*_dis*0.15);half3 halfDir_back =normalize(viewDir+backLight+normalDir*_dis*0.1);//DOT Preparehalf VdotL = pow(saturate(dot(viewDir,backLight)),_Pow*20)*_Value;   half VdotLF = dot(viewDir,lightDir)*0.5+0.5;     //half NdotH_back = saturate(dot(normalDir,halfDir_back));half NdotV = saturate(dot(normalDir,viewDir));half NdotV2 = saturate(dot(normalDir2,viewDir));half NdotL = dot(normalDir,lightDir)*0.5+0.5;     //MatCaphalf3 Vnormal = normalize(mul(UNITY_MATRIX_V,normalDir2));//旋转MatCapfloat2 MatCapUV = Vnormal.xy*0.5+0.5;float cosAngle = cos (radians(_rotation));float sinAngle =sin(radians(_rotation));float2x2 rot = float2x2(cosAngle,-sinAngle,sinAngle,cosAngle);float2 center = float2(0.5,0.5);MatCapUV -= center;MatCapUV = mul(rot,MatCapUV);MatCapUV += center;//这步计算没啥道理,就自己想当然来的 float4 MatCapSpecular =tex2D(_MatCap,MatCapUV)*_MatCapColor*pow(NdotV2,_Roughness*1000);UNITY_LIGHT_ATTENUATION(atten,i,i.posWS);//ThickMap 根据实际提供的贴图 可以随意进行反向转换float4 thickness;if (_ThickMapInvert == 0){thickness = tex2D(_ThickMap,i.uv)*_ThickMapIntensity; }else{thickness = (1-tex2D(_ThickMap,i.uv))*_ThickMapIntensity; }//FinalColorfixed4 col = tex2D(_MainTex, i.uv);float4 frontCol =col*_MainColor*NdotL*_LightColor0*atten;float4 backCol =col*_BackColor*VdotL*_LightColor0*thickness;float4 finalCol =lerp(frontCol,backCol,VdotLF);return finalCol;}ENDCG}}FallBack "Diffuse"
}

总结

嗯虽然慢了点。但是实现的效果还行~ 算是比较满意了也能根据开放的参数调出多种效果了。

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文章目录

自言自语

一、效果

第一版效果

第二版效果

二、Shder

总结

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