Shader "Shader/OldschoolPlus" { Properties { [Header(Texture)] //面板需要的参数 _MainTex ("color texture", 2D) = "white"{} _NormTex ("normal texture",2D) = "bump" {} _SpecTex ("specular texture", 2D) = "gray" {} _Cubemap ("cubemap",cube) = "_Skybox" {} [Header(Diffuse)] _MainCol ("main color", color) = (0.5, 0.5, 0.5, 1.0) _EnvDiffInt("diffuse intense", Range(0,1)) = 0.2 _EnvUpCol ("up color", Color) = (1.0, 1.0, 1.0, 1.0) _EnvSideCol ("sude color", Color) = (0.5, 0.5, 0.5, 1.0) _EnvDownCol ("ground color", Color) = (0.0, 0.0, 0.0, 0.0) [Header(Specular)] _SpecPow ("specular power", Range(1, 90)) = 30 _FresnelPow("FresnelPow",Range(0,10)) = 1 _EnvSpecInt("EnvSpecInt",Range(0,5)) = 1 _CubemapMip ("cubemap Mip", Range(1, 7)) = 1 } SubShader { Tags { "RenderType"="Opaque" } Pass { Name "FORWARD" Tags { "LightMode"="ForwardBase" } CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" // 追加投影相关包含文件 #include "AutoLight.cginc" #include "Lighting.cginc" #pragma multi_compile_fwdbase_fullshadows #pragma target 3.0 uniform sampler2D _MainTex; uniform sampler2D _NormTex; uniform sampler2D _SpecTex; uniform samplerCUBE _Cubemap; uniform float3 _MainCol; uniform float _EnvDiffInt; uniform float3 _EnvUpCol; uniform float3 _EnvSideCol; uniform float3 _EnvDownCol; uniform float _SpecPow; uniform float _FresnelPow; uniform float _EnvSpecInt; uniform float _CubemapMip; struct vertexInput { float4 vertex : POSITION; float4 normal : NORMAL; float2 uv0 : TEXCOORD0; float4 tangent : TANGENT; //切线信息 }; struct vertexOutput { float4 pos :SV_POSITION; //注意!此处必须命名为pos,需要和Unity封装好的方法的参数对应 float4 posWS : TEXCOORD0; float3 nDirWS : TEXCOORD1; float3 tDirWS : TEXCOORD2; float3 bDirWS : TEXCOORD3; //世界副切线方向 float2 uv : TEXCOORD4; LIGHTING_COORDS(5,6) }; vertexOutput vert (vertexInput v) { vertexOutput o = (vertexOutput)0; o.pos = UnityObjectToClipPos(v.vertex); o.posWS = mul(unity_ObjectToWorld, v.vertex); o.nDirWS = UnityObjectToWorldNormal(v.normal); o.uv = v.uv0; o.tDirWS = normalize(mul(unity_ObjectToWorld, float4(v.tangent.xyz,0.0)).xyz); o.bDirWS = normalize(cross(o.nDirWS, o.tDirWS) * v.tangent.w);//切线和法线方向叉乘 TRANSFER_VERTEX_TO_FRAGMENT(o) return o; } fixed4 frag (vertexOutput i) : SV_Target { // 准备向量 float3 nDirTS = UnpackNormal(tex2D(_NormTex, i.uv)).rgb; float3x3 TBN = float3x3(i.tDirWS, i.bDirWS, i.nDirWS); float3 nDirWS = normalize(mul(nDirTS, TBN)); float3 vDirWS = normalize(_WorldSpaceCameraPos.xyz - i.posWS.xyz); float3 vrDirWS = reflect(-vDirWS, nDirWS); float3 lDirWS = _WorldSpaceLightPos0.xyz; float3 lrDirWS = reflect(-lDirWS, nDirWS); // 准备点积结果 float ndotl = dot(nDirWS, lDirWS); float vdotr = dot(vDirWS, lrDirWS); float vdotn = dot(vDirWS, nDirWS); // 采样纹理 float4 var_MainTex = tex2D(_MainTex, i.uv); float4 var_SpecTex = tex2D(_SpecTex, i.uv); float3 var_Cubemap = texCUBElod(_Cubemap, float4(vrDirWS, lerp(_CubemapMip, 0.0, var_SpecTex.a))).rgb; //随着var_SpecTex.a的值cubemap的mip值在0到给定的_CubemapMip之间变化,如果var_SpecTex.a=0,那就是_CubemapMip,var_SpecTex.a=1,那就是0 //直接光照 float3 baseCol = var_MainTex.rgb * _MainCol; float3 lambert = max(0.0, ndotl); float specCol = var_SpecTex.rgb; float specPow = lerp(1, _SpecPow, var_SpecTex.a); float phong = pow(max(0.0, vdotr),specPow); float shadow = LIGHT_ATTENUATION(i); float3 dirLighting = (baseCol * lambert + specCol * phong) * _LightColor0 * shadow; //环境光照 float upMask = max(0.0, nDirWS.g); // 获取朝上部分遮罩 float downMask = max(0.0, -nDirWS.g); // 获取朝下部分遮罩 float sideMask = 1.0 - upMask - downMask; // 获取侧面部分遮罩 float3 envCol = _EnvUpCol * upMask + _EnvSideCol * sideMask + _EnvDownCol * downMask; // 混合环境色 float fresnel = pow(max(0.0, 1.0 - vdotn), _FresnelPow); // 菲涅尔 float occlusion = var_MainTex.a; float3 envLighting = (baseCol * envCol * _EnvDiffInt + var_Cubemap * fresnel * _EnvSpecInt * var_SpecTex.a) * occlusion; // 返回结果 float3 finalRGB = dirLighting + envLighting; return float4(finalRGB, 1.0); } ENDCG } } FallBack "Diffuse" }
标签:nDirWS,float,庄懂,uniform,Lesson10,var,SpecTex,TA,float3 From: https://www.cnblogs.com/lofu/p/17101398.html