文章目录

SD部分
Shader代码部分

呃呃，这是目前我学习庄懂AP01课程的最后一节了，我看了一下21集之后的内容是关于LightingMap，目前感觉还用不到，加上之前参与过一个项目里面也有用到LightingMap，也算了解过，就暂时先放到待办列表里。

下面也是简单记录一下课上的东西，其实整节课似懂非懂，感觉难度很大，也很能体会到老师的清晰逻辑，感叹一下，以后能成为这样的大神吗。这节课内容更多是简单记录，有些地方我也不是很懂，下面就直接开始吧。

SD部分

SD部分我就没有跟，因为打算后面再找门网课系统地学习一下。
在这里插入图片描述

模型需要顶点色，因为底座不需要变化，所以顶点色全为黑，变化的是底座上面地部分，所以全为白。
还需要两张UV，第一张UV用来普通地采样主纹理、法线、高光和自发光等的贴图。而第二章UV则是为后续的特效做准备。
制作UV网格图，这部分就是将模型导入sd里，然后进行烘培，获得UV网格图。

并且要在SD里获得两张图：

_EffMap01。这张用来存储网格、面随机灰度以及面上坡度(面上的灰度渐变)。
_EffMap02。这张用来存储噪声，后面的特效需要用到。
为什么不把这个灰度塞到上面红绿图的A通道里呢？
涉及到优化问题，RGB与RGBA的图片，这两种图在Unity里压缩的尺寸不是多1/4，而是多了一倍。所以一张图能不加alpha就不加alpha，看起来多了一个通道，其实内存占用多了很多。

Shader代码部分

在这里插入图片描述

Shader "shader forge/L21_OldSchoolPlusWithMeshAnim"
{Properties{[Header(Texture)]_MainTex ("Main Tex   RGB:Base Color  A:EnvMask", 2D) = "white" {}        _normal ("normal", 2D) = "bump" {}_SpecTex ("Spec Tex   RGB:Spec Color  A:Spec Pow", 2D) = "white" {}_EmittTex ("Emitt Tex   RGB:Env Tex", 2D) = "black" {}_cubemap ("cubemap", Cube) = "_Skybox" {}[Header(Diffuse)]_MainCol ("Main Color", Color) = (0.5,0.5,0.5,1.0)_EnvDiffInt ("Env Diff Int", Range(0, 1)) = 0.2_E_Lambert_UpColor ("E_Lambert_UpColor", Color) = (0.8679245,0.5444998,0.5444998,1)_E_Lambert_DownColor ("E_Lambert_DownColor", Color) = (0.4400143,0.6626909,0.9056604,1)_E_Lambert_MidColor ("E_Lambert_MidColor", Color) = (0.4800081,0.8962264,0.4016109,1)[Header(Specular)]
[PowerSlider(2)]        _SpecPow ("Spec Pow", Range(1, 90)) = 30        _EnvSpecInt ("Env_SpecInt", Range(0, 5)) = 0.7826087_fresnel_exp ("fresnel_exp", Range(0, 90)) = 0.6956522_mipmap_level ("Env Mipmap", Range(0, 7)) = 0[Header(Emission)]_EmittInt ("Emitt Int", Range(1,10)) = 1[Header(Clock)]_EffMap01 ("Effect Tex1", 2D) = "gray" {}_EffMap02 ("Effect Tex2", 2D) = "gray" {}_EffCol ("Effect Color", color) = (0.0,0.0,0.0,0.0)_EffParams ("Wave Prop  X:Int  Y:Speed  Z:ChaosInt  W:FadeInt", vector) = (0.03,3.0,0.3,2.5)}SubShader{Tags {"Queue" = "Transparent""RenderType"="Transparent" }LOD 100Pass{Name "FORWARD"Tags{"LightMode" = "ForwardBase"}Blend One OneMinusSrcAlpha      //ABCGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"#include "AutoLight.cginc"#include "Lighting.cginc"#pragma multi_compile_fwdbase_fullshadows#pragma target 3.0struct appdata{float4 vertex : POSITION;float2 uv0 : TEXCOORD0;float2 uv1 : TEXCOORD1;         //特效网格UV信息float3 normal : NORMAL;float4 tangent : TANGENT;float4 color : COLOR;               //顶点色信息};struct v2f{float2 uv0 : TEXCOORD0;float2 uv1 : TEXCOORD1;float4 pos : SV_POSITION;float4 posWorld : TEXCOORD2;float3 nDirWS : TEXCOORD3;float3 tDirWS : TEXCOORD4;float3 biDirWS : TEXCOORD5;float4 effectMask : TEXCOORD6;LIGHTING_COORDS(7,8)            //投影相关};//Textureuniform sampler2D _MainTex;            uniform sampler2D _normal;uniform sampler2D _SpecTex;uniform sampler2D _EmittTex;uniform samplerCUBE _cubemap;           //Diffuseuniform float3 _MainCol;uniform float _EnvDiffInt;uniform float3 _E_Lambert_UpColor;uniform float3 _E_Lambert_DownColor;uniform float3 _E_Lambert_MidColor;//Specularuniform float _SpecPow;            uniform float _EnvSpecInt;            uniform float _fresnel_exp;uniform float _mipmap_level;//Emittuniform float _EmittInt;//Effectuniform sampler2D _EffMap01;uniform sampler2D _EffMap02;uniform float3 _EffCol;uniform float4 _EffParams;#define TWO_PI 3.1415926*2//动画方法 inout顶点信息 返回effect相关遮罩float4 CyberpunkAnim(float noise, float mask, float3 normal, inout float3 vertex){//生成锯齿波Maskfloat baseMask = abs(frac(vertex.y * _EffParams.x - _Time.x * _EffParams.y) - 0.5) *2.0; //float baseMask1 = abs(frac(vertex.y) - 0.5) * 2.0;//让白色的时间更多，黑色的时间更少baseMask = min(1.0, baseMask * 2.0);//用Noise偏移锯齿波，noise的取值范围为0到1，减去0.5使其有正有负baseMask += (noise - 0.5) * _EffParams.z;//smoothstep算出各级Maskfloat4 effectMask = float4(0.0,0.0,0.0,0.0);effectMask.x = smoothstep(0.0,0.9,baseMask);effectMask.y = smoothstep(0.2,0.7,baseMask);effectMask.z = smoothstep(0.4,0.5,baseMask);//将顶点色遮罩存入effectMaskeffectMask.w = mask;//计算顶点动画vertex.xz += normal.xz * (1.0 - effectMask.x) * _EffParams.w * mask;//返回effectMaskreturn effectMask;//return float4(baseMask1,baseMask1,baseMask1,1.0);}v2f vert (appdata v){//采样纹理float noise = tex2Dlod(_EffMap02, float4(v.uv1, 0.0, 0.0)).r;//float noise = tex2Dlod(_EffMap02,v.uv1).r;v2f o;o.effectMask = CyberpunkAnim(noise, v.color.r, v.normal.xyz, v.vertex.xyz);o.pos = UnityObjectToClipPos(v.vertex);o.uv0 = v.uv0;o.uv1 = v.uv1;o.posWorld = mul(unity_ObjectToWorld, v.vertex);o.nDirWS = UnityObjectToWorldNormal(v.normal);o.tDirWS = normalize(mul(unity_ObjectToWorld,float4(v.tangent.xyz,0.0)).xyz);o.biDirWS = normalize(cross(o.nDirWS,o.tDirWS) * v.tangent.w);TRANSFER_VERTEX_TO_FRAGMENT(o)return o;}fixed4 frag (v2f i) : SV_Target{//贴图采样float3 nDirTS = UnpackNormal(tex2D(_normal,i.uv0)).rgb;//向量准备float3x3 TBN_Matrix = float3x3(i.tDirWS,i.biDirWS,i.nDirWS);float3 nDirWS_FT = normalize(mul(nDirTS, TBN_Matrix));float3 lightDir = normalize(_WorldSpaceLightPos0.xyz);float3 lrDirWS = normalize(reflect(-lightDir, nDirWS_FT));float3 viewDir = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);float3 halfDir = normalize(lightDir + viewDir);float3 vrDir = normalize(reflect(-viewDir,nDirWS_FT));//准备点积结果float NoL = max(0.0,dot(lightDir,nDirWS_FT));float NoH = max(0.0,dot(nDirWS_FT,halfDir));float NoV = max(0.0,dot(nDirWS_FT,viewDir));float VoR = max(0.0,dot(viewDir, lrDirWS));//采样纹理float4 var_MainTex = tex2D(_MainTex,i.uv0);float4 var_SpecTex = tex2D(_SpecTex,i.uv0);float3 var_EmitTex = tex2D(_EmittTex,i.uv0);//光照模型(直接光照部分)float3 baseCol = var_MainTex.rgb * _MainCol;float lambert = max(0.0,NoL);float specCol = var_SpecTex.rgb;float specPow = lerp(1, _SpecPow,var_SpecTex.a);float phong = pow(max(0.0, lrDirWS), specPow);float shadow = LIGHT_ATTENUATION(i);float3 dirLighting = (baseCol * lambert + specCol * phong) * _LightColor0 * shadow;//光照模型(环境光照部分)//使用3Col环境色方法/*下面是环境光的漫反射部分，也就是三色环境光*///上层光float upNor = clamp(nDirWS_FT.g,0.0,1.0);float3 upColor = upNor * _E_Lambert_UpColor;//下层光float downNor = clamp(nDirWS_FT.g * -1,0.0,1.0);float3 downColor = downNor * _E_Lambert_DownColor;//中层光float midNor = clamp(1 - upNor - downNor,0.0,1.0);float3 midColor = midNor * _E_Lambert_MidColor;/*环境光的漫反射部分  三色环境光*/float3 env_diff_all = clamp(upColor + downColor + midColor,0.0,1.0);/*下面是环境镜面反射光部分*///cubemapfloat3 cubemap_Dir = vrDir;float3 cubemap_color = texCUBElod(_cubemap,float4(cubemap_Dir,_mipmap_level));//fresnelfloat OneMinusNoV = 1 - NoV;float fresnel = pow(OneMinusNoV,_fresnel_exp);float occlusion = var_MainTex.a;float3 envLighting = (baseCol * env_diff_all * _EnvDiffInt + cubemap_color * fresnel * _EnvSpecInt * var_SpecTex.a) * occlusion;//光照模型(自发光部分)float3 emission = var_EmitTex * _EmittInt * (sin(_Time.z) * 0.5 + 0.5);//特效部分//采样EffMap01float3 _EffMap01_var = tex2D(_EffMap01,i.uv1).xyz;float meshMask = _EffMap01_var.x;               //网格遮罩float faceRandomMask = _EffMap01_var.y;   //面上的随即灰度遮罩float faceSlopeMask = _EffMap01_var.z;        //面上的坡度(灰度渐变)遮罩//获取EffectMaskfloat smallMask = i.effectMask.x;float midMask = i.effectMask.y;float bigMask = i.effectMask.z;float baseMask = i.effectMask.w;//计算Opacityfloat midOpacity = saturate(floor(min(faceRandomMask, 0.999999) + midMask));float bigOpacity = saturate(floor(min(faceSlopeMask, 0.999999) + midMask));float opacity = lerp(1.0, min(bigOpacity, midOpacity), baseMask);//叠加自发光float meshEmitInt = (bigMask - smallMask) * meshMask;meshEmitInt = meshEmitInt * meshEmitInt;emission += _EffCol * meshEmitInt * baseMask;///返回结果float3 finalRGB = dirLighting + envLighting + emission;return float4(finalRGB * opacity, opacity);              //return bigOpacity;}ENDCG}}FallBack "Diffuse"
}