庄懂着色器_L08_OldSchoolPlus/Normal

Shader "AP01/L08/OldSchoolPlus"
{Properties{_BaseCol    ("基本色",      Color)          = (0.5, 0.5, 0.5, 1.0)_LightCol   ("光颜色",      Color)          = (1.0, 1.0, 1.0, 1.0)_SpecPow    ("高光次幂",    Range(1, 90))   = 30_Occlusion  ("AO图",        2D)             = "white" {}_EnvInt     ("环境光强度",  Range(0, 1))    = 0.2_EnvUpCol   ("环境天顶颜色", Color)          = (1.0, 1.0, 1.0, 1.0)_EnvSideCol ("环境水平颜色", Color)          = (0.5, 0.5, 0.5, 1.0)_EnvDownCol ("环境地表颜色", Color)          = (0.0, 0.0, 0.0, 0.0)}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// 输入参数uniform float3 _BaseCol;uniform float3 _LightCol;uniform float _SpecPow;uniform sampler2D _Occlusion;uniform float _EnvInt;uniform float3 _EnvUpCol;uniform float3 _EnvSideCol;uniform float3 _EnvDownCol;// 输入结构struct VertexInput{float4 vertex   : POSITION;   // 顶点信息 Get✔float4 normal   : NORMAL;     // 法线信息 Get✔float2 uv0      : TEXCOORD0;  // UV信息 Get✔};// 输出结构struct VertexOutput{float4 pos    : SV_POSITION;  // 裁剪空间（暂理解为屏幕空间吧）顶点位置float2 uv0      : TEXCOORD0;    // UV0float4 posWS    : TEXCOORD1;    // 世界空间顶点位置float3 nDirWS   : TEXCOORD2;    // 世界空间法线方向LIGHTING_COORDS(3,4)            // 投影相关};// 输入结构>>>顶点Shader>>>输出结构VertexOutput vert (VertexInput v){VertexOutput o = (VertexOutput)0;                   // 新建输出结构o.pos = UnityObjectToClipPos( v.vertex );       // 变换顶点位置 OS>CSo.uv0 = v.uv0;                                  // 传递UVo.posWS = mul(unity_ObjectToWorld, v.vertex);   // 变换顶点位置 OS>WSo.nDirWS = UnityObjectToWorldNormal(v.normal);  // 变换法线方向 OS>WSTRANSFER_VERTEX_TO_FRAGMENT(o)                  // 投影相关return o;                                           // 返回输出结构}// 输出结构>>>像素float4 frag(VertexOutput i) : COLOR{// 准备向量float3 nDir = normalize(i.nDirWS);float3 lDir = _WorldSpaceLightPos0.xyz;float3 vDir = normalize(_WorldSpaceCameraPos.xyz - i.posWS.xyz);float3 rDir = reflect(-lDir, nDir);// 准备点积结果float ndotl = dot(nDir, lDir);float vdotr = dot(vDir, rDir);// 光照模型(直接光照部分)float shadow = LIGHT_ATTENUATION(i);        // 获取投影float lambert = max(0.0, ndotl);float phong = pow(max(0.0, vdotr), _SpecPow);float3 dirLighting = (_BaseCol * lambert + phong) * _LightCol * shadow;// 光照模型(环境光照部分)float upMask = max(0.0, nDir.g);                // 获取朝上部分遮罩float downMask = max(0.0, -nDir.g);             // 获取朝下部分遮罩float sideMask = 1.0 - upMask - downMask;       // 获取侧面部分遮罩// 混合环境色float3 envCol = _EnvUpCol * upMask + _EnvSideCol * sideMask + _EnvDownCol * downMask;float occlusion = tex2D(_Occlusion, i.uv0);         // 采样Occlusion贴图float3 envLighting = envCol * _EnvInt * occlusion;  // 计算环境光照// 返回结果float3 finalRGB = dirLighting + envLighting;return float4(finalRGB, 1.0);}ENDCG}}FallBack "Diffuse"
}

Shader "AP01/L08/NormalMap"
{Properties{_NormalMap ("法线贴图", 2D) = "bump" {}}SubShader{Tags { "RenderType"="Opaque" }Pass{Name "FORWARD"Tags { "LightMode"="ForwardBase" }CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"#pragma multi_compile_fwdbase_fullshadows#pragma target 3.0// 输入参数uniform sampler2D _NormalMap;// 输入结构struct VertexInput{float4 vertex : POSITION;   // 顶点信息float2 uv0 : TEXCOORD0;     // 需要UV坐标 采样法线贴图float4 normal : NORMAL;     // 法线信息float4 tangent : TANGENT;   // 构建TBN矩阵 需要模型切线信息};// 输出结构struct VertexOutput{float4 pos : SV_POSITION;float2 uv0 : TEXCOORD0;     // UV信息float3 nDirWS : TEXCOORD1;  // 世界空间法线信息float3 tDirWS : TEXCOORD2;  // 世界空间切线信息float3 bDirWS : TEXCOORD3;  // 世界空间切线信息};// 输入结构>>>顶点Shader>>>输出结构VertexOutput vert (VertexInput v){VertexOutput o = (VertexOutput)0;               // 新建一个输出结构o.pos = UnityObjectToClipPos( v.vertex );       // 变换顶点信息 并将其塞给输出结构o.uv0 = v.uv0;                                  // 传递UV信息o.nDirWS = UnityObjectToWorldNormal(v.normal);  // 世界空间法线信息o.tDirWS = normalize(mul( unity_ObjectToWorld, float4(v.tangent.xyz, 0.0)).xyz);    // 世界空间切线信息o.bDirWS = normalize(cross(o.nDirWS, o.tDirWS) * v.tangent.w);   // 世界空间切线信息return o;                                       // 将输出结构 输出}// 输出结构>>>像素float4 frag(VertexOutput i) : COLOR{// 获取nDirfloat3 nDirTS = UnpackNormal(tex2D(_NormalMap, i.uv0)).rgb;  // 采样法线纹理并解码 切线空间nDirfloat3x3 TBN = float3x3(i.tDirWS, i.bDirWS, i.nDirWS);              // 构建TBN矩阵float3 nDirWS = normalize(mul(nDirTS, TBN));                   // 世界空间nDir// 获取lDirfloat3 lDir = _WorldSpaceLightPos0.xyz;// 一般Lambertfloat nDotl = dot(nDirWS, lDir);                  // nDir点积lDirfloat lambert = max(0.0, nDotl);                // 截断负值return float4(lambert, lambert, lambert, 1.0);  // 输出最终颜色}ENDCG}}FallBack "Diffuse"
}