//效果预览

 

 

//Shader代码

Shader "Unlit/HalfLambert"{    Properties    {        _MainTex ("Texture", 2D) = "white" {}        _Diffuse ("Diffuse Color", Color) = (0,0,0,0)    }    SubShader    {        Tags { "RenderType"="Opaque" }        LOD 100        Pass        {            CGPROGRAM            #pragma vertex vert            #pragma fragment frag            // make fog work            #pragma multi_compile_fog                        #include "UnityCG.cginc"            #include "Lighting.cginc"            struct a2v              {                  float4 vertex : POSITION;                  float3 normal : NORMAL;                  float4 texcoord : TEXCOORD0;              };              struct v2f            {                float2 uv : TEXCOORD0;                UNITY_FOG_COORDS(1)                float4 vertex : SV_POSITION;                fixed3 worldNormal:TEXCOORD1;            };            sampler2D _MainTex;            float4 _MainTex_ST;            fixed4 _Diffuse;                        v2f vert (a2v v)            {                v2f o;                o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);                o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);                o.worldNormal = mul((float3x3)unity_ObjectToWorld,v.normal);                UNITY_TRANSFER_FOG(o,o.vertex);                return o;            }                        fixed4 frag (v2f i) : SV_Target            {                fixed3 worldLightDir = normalize(_WorldSpaceLightPos0.xyz);                fixed3 worldNormal = normalize(i.worldNormal);                fixed3 halLambert = 0.5+0.5*dot(worldLightDir,worldNormal);                fixed3 dif = (UNITY_LIGHTMODEL_AMBIENT+halLambert*_LightColor0)*_Diffuse;                // sample the texture                fixed4 col = tex2D(_MainTex, i.uv);                // apply fog                UNITY_APPLY_FOG(i.fogCoord, col);                return fixed4(dif * col.rgb, col.a);                 return col;            }            ENDCG        }    }}