江苏省建设工程网站,网站的优化和推广方案怎么写,百度网盘搜索引擎入口在哪,广州网络推广营销公司文章目录 前言一、在Unity中#xff0c;按一下步骤准备1、在资源管理面板创建一个 Standard Surface Shader2、因为Standard Surface Shader有很多缺点#xff0c;所以我们把他转化为顶点片元着色器3、整理只保留主平行光的Shader效果4、精简后的最终代码 前言
在Unity中按一下步骤准备1、在资源管理面板创建一个 Standard Surface Shader2、因为Standard Surface Shader有很多缺点所以我们把他转化为顶点片元着色器3、整理只保留主平行光的Shader效果4、精简后的最终代码 前言
在Unity中实现PBR材质的Shader 一、在Unity中按一下步骤准备
1、在资源管理面板创建一个 Standard Surface Shader 2、因为Standard Surface Shader有很多缺点所以我们把他转化为顶点片元着色器
点击Show generated code 把生成后的顶点片元着色器代码复制过去 这样我们就可以得到一个简单的PBR材质了 3、整理只保留主平行光的Shader效果 4、精简后的最终代码
最终效果
给予对应纹理 //Standard材质
Shader MyShader/P2_2_4
{Properties{_Color (Color, Color) (1,1,1,1)_MainTex (Albedo (RGB), 2D) white {}[NoScaleOffset]_MetallicTex(Metallic(R) Smoothness(G) AO(B),2D) white {}[Normal]_NormalTex(NormalTex,2D) bump {}_Glossiness (Smoothness, Range(0,1)) 0.0_Metallic (Metallic, Range(0,1)) 0.0_AO(AO,Range(0,1)) 1.0}SubShader{Tags{RenderTypeOpaque}LOD 200// ---- forward rendering base pass:Pass{Name FORWARDTags{LightMode ForwardBase}CGPROGRAM// compile directives#pragma vertex vert#pragma fragment frag#pragma target 3.0#pragma multi_compile_instancing#pragma multi_compile_fog#pragma multi_compile_fwdbase#include UnityCG.cginc#include Lighting.cginc#include UnityPBSLighting.cginc#include AutoLight.cgincsampler2D _MainTex;float4 _MainTex_ST;half _Glossiness;half _Metallic;fixed4 _Color;sampler2D _MetallicTex;half _AO;sampler2D _NormalTex;struct appdata{float4 vertex : POSITION;float4 tangent : TANGENT;float3 normal : NORMAL;float4 texcoord : TEXCOORD0;float4 texcoord1 : TEXCOORD1;float4 texcoord2 : TEXCOORD2;float4 texcoord3 : TEXCOORD3;fixed4 color : COLOR;UNITY_VERTEX_INPUT_INSTANCE_ID};// vertex-to-fragment interpolation data// no lightmaps:struct v2f{float4 pos : SV_POSITION;float2 uv : TEXCOORD0; // _MainTexfloat3 worldNormal : TEXCOORD1;float3 worldPos : TEXCOORD2;#if UNITY_SHOULD_SAMPLE_SHhalf3 sh : TEXCOORD3; // SH#endif//切线空间需要使用的矩阵float3 tSpace0 : TEXCOORD4;float3 tSpace1 : TEXCOORD5;float3 tSpace2 : TEXCOORD6;UNITY_FOG_COORDS(7)UNITY_SHADOW_COORDS(8)};// vertex shaderv2f vert(appdata v){v2f o;o.pos UnityObjectToClipPos(v.vertex);o.uv.xy TRANSFORM_TEX(v.texcoord, _MainTex);float3 worldPos mul(unity_ObjectToWorld, v.vertex).xyz;float3 worldNormal UnityObjectToWorldNormal(v.normal);//世界空间下的切线half3 worldTangent UnityObjectToWorldDir(v.tangent);//切线方向half tangentSign v.tangent.w * unity_WorldTransformParams.w;//世界空间下的副切线half3 worldBinormal cross(worldNormal, worldTangent) * tangentSign;//切线矩阵o.tSpace0 float3(worldTangent.x, worldBinormal.x, worldNormal.x);o.tSpace1 float3(worldTangent.y, worldBinormal.y, worldNormal.y);o.tSpace2 float3(worldTangent.z, worldBinormal.z, worldNormal.z);o.worldPos.xyz worldPos;o.worldNormal worldNormal;// SH/ambient and vertex lights#if UNITY_SHOULD_SAMPLE_SH !UNITY_SAMPLE_FULL_SH_PER_PIXELo.sh 0;// Approximated illumination from non-important point lights#ifdef VERTEXLIGHT_ONo.sh Shade4PointLights (unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,unity_LightColor[0].rgb, unity_LightColor[1].rgb, unity_LightColor[2].rgb, unity_LightColor[3].rgb,unity_4LightAtten0, worldPos, worldNormal);#endifo.sh ShadeSHPerVertex (worldNormal, o.sh);#endifUNITY_TRANSFER_LIGHTING(o, v.texcoord1.xy);UNITY_TRANSFER_FOG(o, o.pos); // pass fog coordinates to pixel shaderreturn o;}// fragment shaderfixed4 frag(v2f i) : SV_Target{UNITY_EXTRACT_FOG(i);float3 worldPos i.worldPos.xyz;float3 worldViewDir normalize(UnityWorldSpaceViewDir(worldPos));SurfaceOutputStandard o;UNITY_INITIALIZE_OUTPUT(SurfaceOutputStandard, o);fixed4 mainTex tex2D(_MainTex, i.uv);o.Albedo mainTex.rgb * _Color;o.Emission 0.0;fixed4 metallicTex tex2D(_MetallicTex, i.uv);o.Metallic metallicTex.r * _Metallic;o.Smoothness metallicTex.g * _Glossiness;o.Occlusion metallicTex.b * _AO;o.Alpha 1;half3 normalTex UnpackNormal(tex2D(_NormalTex,i.uv));half3 worldNormal half3(dot(i.tSpace0,normalTex),dot(i.tSpace1,normalTex),dot(i.tSpace2,normalTex));o.Normal worldNormal;// compute lighting shadowing factorUNITY_LIGHT_ATTENUATION(atten, i, worldPos)// Setup lighting environmentUnityGI gi;UNITY_INITIALIZE_OUTPUT(UnityGI, gi);gi.indirect.diffuse 0;gi.indirect.specular 0;gi.light.color _LightColor0.rgb;gi.light.dir _WorldSpaceLightPos0.xyz;// Call GI (lightmaps/SH/reflections) lighting functionUnityGIInput giInput;UNITY_INITIALIZE_OUTPUT(UnityGIInput, giInput);giInput.light gi.light;giInput.worldPos worldPos;giInput.worldViewDir worldViewDir;giInput.atten atten;#if defined(LIGHTMAP_ON) || defined(DYNAMICLIGHTMAP_ON)giInput.lightmapUV IN.lmap;#elsegiInput.lightmapUV 0.0;#endif#if UNITY_SHOULD_SAMPLE_SH !UNITY_SAMPLE_FULL_SH_PER_PIXELgiInput.ambient i.sh;#elsegiInput.ambient.rgb 0.0;#endifgiInput.probeHDR[0] unity_SpecCube0_HDR;giInput.probeHDR[1] unity_SpecCube1_HDR;#if defined(UNITY_SPECCUBE_BLENDING) || defined(UNITY_SPECCUBE_BOX_PROJECTION)giInput.boxMin[0] unity_SpecCube0_BoxMin; // .w holds lerp value for blending#endif#ifdef UNITY_SPECCUBE_BOX_PROJECTIONgiInput.boxMax[0] unity_SpecCube0_BoxMax;giInput.probePosition[0] unity_SpecCube0_ProbePosition;giInput.boxMax[1] unity_SpecCube1_BoxMax;giInput.boxMin[1] unity_SpecCube1_BoxMin;giInput.probePosition[1] unity_SpecCube1_ProbePosition;#endifLightingStandard_GI(o, giInput, gi);// PBS的核心计算fixed4 c LightingStandard(o, worldViewDir, gi);UNITY_APPLY_FOG(_unity_fogCoord, c); // apply fogUNITY_OPAQUE_ALPHA(c.a); //把c的Alpha置1return c;}ENDCG}}}
