{"id":3006,"date":"2021-05-16T22:10:00","date_gmt":"2021-05-16T14:10:00","guid":{"rendered":"https:\/\/www.yumefx.com\/?p=3006"},"modified":"2022-03-04T10:37:16","modified_gmt":"2022-03-04T02:37:16","slug":"%e5%85%89%e7%85%a7%e6%a8%a1%e5%9e%8b%e5%9f%ba%e7%a1%80%e4%b9%8b%e7%8e%af%e5%a2%83%e5%85%89%e7%85%a7","status":"publish","type":"post","link":"https:\/\/www.yumefx.com\/?p=3006","title":{"rendered":"\u5149\u7167\u6a21\u578b\u57fa\u7840\u4e4b\u73af\u5883\u5149\u7167"},"content":{"rendered":"\n

\u524d\u8a00<\/h1>\n

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\u00a0<\/h1>\n

\u73af\u5883\u5149\u7167\u4ecb\u7ecd<\/h1>\n

\u6f2b\u53cd\u5c04\u548c\u9ad8\u5149\u53cd\u5c04\u90fd\u662f\u7528\u6765\u6a21\u62df\u5149\u7ebf\u76f4\u63a5\u7167\u5c04\u7269\u4f53\u8868\u9762\u65f6\u7684\u53cd\u5c04\u6548\u679c\uff0c\u5728\u73b0\u5b9e\u4e16\u754c\u4e2d\u5149\u7ebf\u901a\u5e38\u4f1a\u5728\u591a\u4e2a\u7269\u4f53\u4e4b\u95f4\u53cd\u5c04\uff0c\u6700\u540e\u8fdb\u5165\u6444\u50cf\u673a\uff0c\u4e5f\u5c31\u662f\u6240\u8c13\u7684\u95f4\u63a5\u5149\u7167\uff08indirect light\uff09\u3002<\/p>\n

\u5728\u5ba4\u5185\u7684\u7ea2\u5730\u6bef\u4e0a\u653e\u4e00\u4e2a\u7070\u8272\u7684\u6c99\u53d1\uff0c\u6c99\u53d1\u5e95\u90e8\u4e5f\u4f1a\u6cdb\u7ea2\u8272\uff0c\u539f\u56e0\u5c31\u662f\u7ea2\u8272\u5730\u6bef\u53cd\u5c04\u7684\u5149\u7ebf\u7167\u4eae\u4e86\u6c99\u53d1\u5e95\u90e8\uff0c\u8fd9\u5c31\u662f\u73af\u5883\u5149\u7167\u4e2d\u7684\u6f2b\u53cd\u5c04\uff0c\u8fd9\u79cd\u73b0\u8c61\u4e00\u822c\u79f0\u4e3a\u8272\u5f69\u6ea2\u51fa\uff08Color Bleeding\uff09\u3002<\/p>\n

\"\"<\/p>\n

\u8fd8\u6709\u4e00\u79cd\u5219\u662f\u73af\u5883\u5149\u7167\u4e2d\u7684\u955c\u9762\u53cd\u5c04\uff0c\u4f8b\u5982\u5149\u6ed1\u91d1\u5c5e\u7403\u8868\u9762\u53cd\u5c04\u51fa\u5468\u56f4\u7684\u73af\u5883\u3002<\/p>\n

\"\"<\/p>\n

\u5728\u5f71\u89c6\u5236\u4f5c\u7684\u79bb\u7ebf\u6e32\u67d3\u9886\u57df\u4e2d\uff0c\u73af\u5883\u5149\u7167\u7684\u8ba1\u7b97\u901a\u5e38\u662f\u91c7\u7528\u5149\u7ebf\u8ffd\u8e2a\u65b9\u5f0f\uff0c\u901a\u8fc7\u53d1\u5c04\u4e00\u5b9a\u91cf\u7684\u5149\u7ebf\uff0c\u8ffd\u8e2a\u5e76\u8ba1\u7b97\u5149\u7ebf\u591a\u6b21\u53cd\u5c04\u7684\u8def\u5f84\u4ee5\u53ca\u53cd\u5c04\u9762\u7684\u989c\u8272\uff0c\u7efc\u5408\u8ba1\u7b97\u540e\u5f97\u5230\u6700\u7ec8\u7684\u8868\u9762\u8272\u5f69\u3002<\/p>\n

\u8fd9\u79cd\u7b97\u6cd5\u867d\u7136\u6548\u679c\u5f88\u771f\u5b9e\uff0c\u4f46\u662f\u4f1a\u8017\u8d39\u5927\u91cf\u6027\u80fd\uff0c\u4e0d\u8fc7\u5728\u79bb\u7ebf\u6e32\u67d3\u9886\u57df\uff0c\u6e32\u67d3\u8d28\u91cf\u6c38\u8fdc\u662f\u6bd4\u901f\u5ea6\u66f4\u4e3a\u91cd\u8981\u7684\uff0c\u53ea\u8981\u9884\u7b97\u8db3\u591f\uff0c\u4e00\u5e27\u6e32\u67d3\u51e0\u5929\u4e5f\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\u3002<\/p>\n

\u800c\u5728\u6e38\u620f\u9886\u57df\uff0c\u901f\u5ea6\u5219\u662f\u6700\u4e3a\u91cd\u8981\u7684\uff0c\u8ffd\u6c42\u7684\u662f\u5728\u5927\u591a\u6570\u786c\u4ef6\u4e0a\u80fd\u591f\u8fbe\u5230\u9884\u5b9a\u7684\u6548\u7387\uff08\u6bd4\u598260fps\uff09\uff0c\u5728\u8fd9\u4e2a\u524d\u63d0\u4e0b\u518d\u8ffd\u6c42\u66f4\u9ad8\u7684\u6e32\u67d3\u8d28\u91cf\u3002<\/p>\n

\u56e0\u6b64\u957f\u671f\u4ee5\u6765\uff0c\u6e38\u620f\u5f00\u53d1\u4e2d\u90fd\u662f\u901a\u8fc7\u5404\u79cd\u4f4e\u6d88\u8017\u7b97\u6cd5\u6a21\u62df\u73af\u5883\u5149\u7167\u6216\u8005\u901a\u8fc7\u9884\u8ba1\u7b97\u7684\u5168\u5c40\u5149\u7167\u5b9e\u73b0\u73af\u5883\u5149\u7167\uff0c\u5f53\u7136\u968f\u7740\u6280\u672f\u7684\u53d1\u5c55\u548c\u786c\u4ef6\u6027\u80fd\u7684\u63d0\u5347\uff0c\u73b0\u5728\u6700\u65b0\u7684\u786c\u4ef6\u4ee5\u53ca\u6e38\u620f\u5f15\u64ce\u5df2\u7ecf\u652f\u6301\u5149\u7ebf\u8ffd\u8e2a\uff0c\u6700\u65b0\u7684\u6b21\u4e16\u4ee3\u6e38\u620f\u5df2\u7ecf\u53ef\u4ee5\u5f00\u542f\u5149\u7ebf\u8ffd\u8e2a\u6a21\u5f0f\u4eab\u53d7\u66f4\u597d\u7684\u753b\u9762\u8d28\u91cf\u3002<\/p>\n

\u4f46\u65b0\u6280\u672f\u4e0e\u786c\u4ef6\u7684\u666e\u53ca\u8fd8\u9700\u8981\u4e00\u5b9a\u65f6\u95f4\uff0c\u5f53\u524d\u66f4\u591a\u7684\u6e38\u620f\u7269\u4f53\u4f9d\u7136\u5927\u91cf\u4f7f\u7528\u6a21\u62df\u73af\u5883\u5149\u7167\u4ee5\u53ca\u9884\u8ba1\u7b97\u5168\u5c40\u5149\u7167\u7684\u65b9\u5f0f\u5236\u4f5c\u3002<\/p>\n

\u4e0b\u9762\u5c31\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u6a21\u62df\u73af\u5883\u5149\u7167\u7684\u51e0\u79cd\u65b9\u5f0f\u3002<\/p>\n

\u00a0<\/h1>\n

\u591a\u8272\u73af\u5883\u5149<\/h1>\n

\u8fd9\u79cd\u65b9\u5f0f\u7528\u6765\u6a21\u62df\u73af\u5883\u5149\u7167\u7684\u6f2b\u53cd\u5c04\u989c\u8272\uff0c\u5373\u5c06\u7269\u4f53\u5206\u4e3a\u4e0d\u540c\u90e8\u5206\uff0c\u53e0\u52a0\u4e0a\u4e0d\u540c\u7684\u989c\u8272\uff0c\u4f8b\u5982\u4e0b\u9762\u8fd9\u6837\u901a\u8fc7\u6cd5\u7ebf\u65b9\u5411\u5c06\u7269\u4f53\u5206\u4e3a\u4e0a\u90e8\u3001\u4fa7\u9762\u4ee5\u53ca\u5e95\u90e8\u4e09\u90e8\u5206\uff0c\u5206\u522b\u53e0\u52a0\u4e0d\u540c\u7684\u73af\u5883\u53cd\u5c04\u989c\u8272\u3002<\/p>\n

\"\"<\/p>\n

UE4\u4e2d\u540c\u7406<\/p>\n

\"\"<\/p>\n

\u539f\u7406\u5f88\u7b80\u5355\uff0cshader\u4ee3\u7801\u5c31\u4e0d\u653e\u4e86\u3002<\/p>\n

\u53e6\u5916\u73af\u5883\u53cd\u5c04\u989c\u8272\u53ef\u4ee5\u6709\u4efb\u610f\u4e2a\uff0c\u6e10\u53d8\u65b9\u5411\u4e5f\u53ef\u4ee5\u7528\u5176\u4ed6\u65b9\u5f0f\u5b9a\u4e49\u6216\u65cb\u8f6c\u504f\u79fb\uff0c\u53ef\u4ee5\u5236\u4f5c\u51fa\u4e0d\u9519\u7684\u6548\u679c\u3002<\/p>\n

\u00a0<\/h1>\n

\u83f2\u6d85\u5c14\u53cd\u5c04<\/h1>\n

\u89c2\u5bdf\u4e00\u4e0b\u4e0b\u56fe\u7684\u6c34\u9762\uff0c\u53ef\u4ee5\u53d1\u73b0\u8fd1\u5904\u80fd\u770b\u5230\u6c34\u5e95\u800c\u8fdc\u5904\u5374\u53cd\u5c04\u4e86\u5929\u7a7a\u3002<\/p>\n

\"\"<\/p>\n

\u8fd9\u610f\u5473\u7740\u7269\u4f53\u7684\u53cd\u5c04\u7a0b\u5ea6\u548c\u89c2\u5bdf\u7684\u89d2\u5ea6\u6709\u5173\uff0c\u89c6\u7ebf\u8d8a\u5e73\u884c\u4e8e\u7269\u4f53\u8868\u9762\uff0c\u53cd\u5c04\u8d8a\u5f3a\uff0c\u89c6\u7ebf\u8d8a\u5782\u76f4\u4e8e\u7269\u4f53\u8868\u9762\uff0c\u53cd\u5c04\u8d8a\u5f31\u3002\u56e0\u6b64\uff0c\u5f53\u89c2\u5bdf\u4e00\u4e2a\u5706\u7403\u65f6\uff0c\u5706\u7403\u4e2d\u5fc3\u53cd\u5c04\u6700\u5f31\u800c\u8fb9\u7f18\u53cd\u5c04\u6700\u5f3a\u3002<\/p>\n

\u8fd9\u5c31\u662f\u83f2\u6d85\u5c14\u53cd\u5c04\uff08fresnel\uff09\u3002<\/p>\n

\u8fd9\u79cd\u73b0\u8c61\u5728\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u6240\u6709\u7269\u4f53\u4e0a\u90fd\u5b58\u5728\uff0c\u53ea\u662f\u5728\u5149\u6ed1\u7684\u91d1\u5c5e\u8868\u9762\u8fd9\u7c7b\u7269\u4f53\u4e0a\u4e0d\u660e\u663e\uff0c\u800c\u5f71\u54cd\u83f2\u6d85\u5c14\u53cd\u5c04\u7684\u5219\u662f\u7269\u4f53\u672c\u8eab\u7684\u6298\u5c04\u7387\uff0c\u8fd9\u4e2a\u5c31\u6d89\u53ca\u5230PBR\u7684\u539f\u7406\u4e86\uff0c\u4ee5\u540e\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\u5728\u5f15\u64ce\u4e2d\u6a21\u62df\u83f2\u6d85\u5c14\u53cd\u5c04\u4e5f\u662f\u7528\u4e86\u540c\u6837\u7684\u539f\u7406\uff0c\u53d6\u7269\u4f53\u7684\u4e16\u754c\u7a7a\u95f4\u6cd5\u7ebf\u548c\u89c2\u5bdf\u65b9\u5411\u505a\u70b9\u79ef\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u4ece\u89c6\u89d2\u65b9\u5411\u53d1\u5c04\u5149\u7ebf\u7684Lambert\u6a21\u578b\uff0c\u53ea\u4e0d\u8fc7\u660e\u6697\u5173\u7cfb\u662f\u76f8\u53cd\u7684\u3002<\/p>\n

\u5728Unity\u4e2d\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n

\"\"<\/p>\n

\u5728UE4\u4e2d\u540c\u6837\uff1a<\/p>\n

\"\"<\/p>\n

\u5176\u4e2dPower\u8282\u70b9\u7528\u4e8e\u63a7\u5236\u83f2\u6d85\u5c14\u53cd\u5c04\u7684\u8303\u56f4\u3002<\/p>\n

\u5176\u5b9e\u56fe\u4e0a\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u8fd9\u4e24\u4e2a\u5f15\u64ce\u4e2d\u5df2\u7ecf\u51c6\u5907\u597d\u4e86fresnel\u7684\u8282\u70b9\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\uff0c\u8fd9\u91cc\u53ea\u662f\u4e3a\u4e86\u4ecb\u7ecd\u539f\u7406\u56e0\u6b64\u4f7f\u7528\u5411\u91cf\u70b9\u79ef\u7684\u65b9\u5f0f\u8fdb\u884c\u4e86\u6548\u679c\u5b9e\u73b0\u3002<\/p>\n

\u5728Unity\u4e2d\u7684shader\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\/\/ shader\u7684\u8def\u5f84\u548c\u540d\u79f0<\/span>\nShader \"Shader Forge\/fresnel\" {<\/span>\n    \/\/ \u66b4\u9732\u5c5e\u6027\u5230\u9762\u677f<\/span>\n    Properties {<\/span>\n        _FresnelPow(\"Fresnel Pow\", Range(0, 10)) = 1<\/span>\n    }<\/span>\n    SubShader {<\/span>\n        Tags {<\/span>\n            \"RenderType\"=\"Opaque\"<\/span>\n        }<\/span>\n        Pass {<\/span>\n            Name \"FORWARD\"<\/span>\n            Tags {<\/span>\n                \"LightMode\"=\"ForwardBase\"<\/span>\n            }<\/span>\n            <\/span>\n            CGPROGRAM<\/span>\n            #pragma vertex vert<\/span>\n            #pragma fragment frag<\/span>\n            #include \"UnityCG.cginc\"<\/span>\n            #pragma multi_compile_fwdbase_fullshadows<\/span>\n            #pragma target 3.0<\/span>\n            <\/span>\n            \/\/ \u58f0\u660e\u53d8\u91cf<\/span>\n            uniform float _FresnelPow;<\/span>\n            <\/span>\n            \/\/ \u8f93\u5165\u7ed3\u6784<\/span>\n            struct VertexInput {<\/span>\n                float4 vertex : POSITION;<\/span>\n                float3 normal : NORMAL;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u8f93\u51fa\u7ed3\u6784<\/span>\n            struct VertexOutput {<\/span>\n                float4 pos : SV_POSITION;<\/span>\n                float3 posWS : TEXCOORD0;<\/span>\n                float3 nDirWS : TEXCOORD1;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u9876\u70b9shader<\/span>\n            VertexOutput vert (VertexInput v) {<\/span>\n                VertexOutput o = (VertexOutput)0;<\/span>\n                o.pos = UnityObjectToClipPos( v.vertex );<\/span>\n                o.posWS = mul(unity_ObjectToWorld, v.vertex);<\/span>\n                o.nDirWS = UnityObjectToWorldNormal(v.normal);<\/span>\n                return o;<\/span>\n            }<\/span>\n            <\/span>\n            \/\/ \u50cf\u7d20shader<\/span>\n            float4 frag(VertexOutput i) : COLOR {<\/span>\n                \/\/ \u8ba1\u7b97Fresnel<\/span>\n                float3 nDirWS = i.nDirWS;<\/span>\n                float3 vDirWS = normalize(_WorldSpaceCameraPos.xyz - i.posWS.xyz);  <\/span>\n                float vDotn = dot(vDirWS, nDirWS);<\/span>\n                <\/span>\n                \/\/ \u5149\u7167\u6a21\u578b<\/span>\n                float fresnel = pow(max(0.0, 1.0 - vDotn), _FresnelPow);<\/span>\n   <\/span>\n                return float4(fresnel, fresnel, fresnel, 1.0);<\/span>\n            }<\/span>\n            ENDCG<\/span>\n        }<\/span>\n    }<\/span>\n    FallBack \"Diffuse\"<\/span>\n}<\/span>\n<\/pre>\n\n\n\n
 <\/h1>\n
\u73af\u5883\u53cd\u5c04\u4e4bMatcap<\/h1>\n
\u6a21\u62df\u955c\u9762\u53cd\u5c04\u7684\u6700\u5ec9\u4ef7\u624b\u6bb5\u5c31\u662fMatcap\uff0c\u539f\u7406\u662f\u5c06\u7403\u5f62\u7684\u73af\u5883\u8d34\u56fe\u4ece\u6444\u50cf\u673a\u7684\u89c2\u5bdf\u89c6\u89d2\u6295\u5c04\u5230\u7269\u4f53\u4e0a\uff0c\u8fd9\u4e5f\u662fZbrush\u96d5\u523b\u8f6f\u4ef6\u4e2d\u5e38\u7528\u7684\u8ba1\u7b97\u65b9\u6cd5\u3002<\/p>\n
\u4f8b\u5982\u4e0b\u9762\u56fe\u7247\u4e2d\u7684\u7403\u5f62\u8d34\u56fe\u5373\u4e3aMatcap\u8d34\u56fe\u3002<\/p>\n
\"\"<\/p>\n
\u8fd9\u79cd\u65b9\u5f0f\u7684\u4f18\u70b9\u662f\u6548\u7387\u9ad8\uff0c\u7f3a\u70b9\u662f\u53cd\u5c04\u662f\u56fa\u5b9a\u7684\uff0c\u4fa7\u9762\u8fb9\u7f18\u7684\u53cd\u5c04\u7ecf\u5e38\u4f1a\u53d8\u5f62\uff0c\u79fb\u52a8\u89c2\u5bdf\u89c6\u89d2\u65f6\u5f88\u5bb9\u6613\u7a7f\u5e2e\uff0c\u4f46\u5728\u56fa\u5b9a\u89c6\u89d2\u7684\u6e38\u620f\u4e2d\u53ef\u4ee5\u9002\u5f53\u5e94\u7528\u3002<\/p>\n
\u5177\u4f53\u8ba1\u7b97\u65b9\u6cd5\u662f\u901a\u8fc7\u7269\u4f53\u7684\u89c2\u5bdf\u7a7a\u95f4\u6cd5\u7ebf\u53d6\u51fa\u6a21\u578b\u9762\u5bf9\u6444\u50cf\u673a\u7684\u533a\u57df\uff0c\u4f5c\u4e3aUV\u5bf9Matcap\u8d34\u56fe\u8fdb\u884c\u91c7\u6837\uff0c\u6700\u540e\u53e0\u52a0\u4e0a\u83f2\u6d85\u5c14\u5373\u53ef\u5f97\u5230\u91d1\u5c5e\u6216\u975e\u91d1\u5c5e\u7269\u4f53\u7684\u73af\u5883\u53cd\u5c04\u3002<\/p>\n
\u5728Unity\u4e2d\u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n
\"\"<\/p>\n
\u5176\u4e2d\u4f7f\u7528\u4e86\u6cd5\u7ebf\u8d34\u56fe\u4ee3\u66ff\u7269\u4f53\u7684\u70b9\u6cd5\u7ebf\uff0c\u4f46\u6cd5\u7ebf\u8d34\u56fe\u4e2d\u7684\u6cd5\u7ebf\u662f\u7269\u4f53\u7a7a\u95f4nDirOS\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528Transform\u8282\u70b9\u5c06\u7269\u4f53\u7a7a\u95f4\u8f6c\u4e3a\u89c2\u5bdf\u7a7a\u95f4\u7684nDirVS\u3002\u800cfresnel\u5219\u9700\u8981\u4e16\u754c\u7a7a\u95f4\u6cd5\u7ebfnDirWS\uff0c\u56e0\u6b64\u4e00\u5171\u8fdb\u884c\u4e86\u4e24\u6b21Transform\u7a7a\u95f4\u8f6c\u6362\u3002<\/p>\n
UE4\u4e2d\u540c\u7406\uff1a<\/p>\n
\"\"<\/p>\n
\u5728Unity\u4e2dshader\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n
\/\/ shader\u7684\u8def\u5f84\u548c\u540d\u79f0<\/span>\nShader \"Shader Forge\/matcap\" {<\/span>\n    \/\/ \u66b4\u9732\u5c5e\u6027\u5230\u9762\u677f<\/span>\n    Properties {<\/span>\n        _NormalMap (\"Normal Map\", 2D) = \"bump\" {}<\/span>\n        _Matcap    (\"Matcap\", 2D) = \"gray\" {}<\/span>\n        _FresnelPow(\"Fresnel Pow\", Range(0, 10)) = 1<\/span>\n        _EnvSpecInt(\"EnvSpecInt\", Range(0, 5)) = 1<\/span>\n    }<\/span>\n    SubShader {<\/span>\n        Tags {<\/span>\n            \"RenderType\"=\"Opaque\"<\/span>\n        }<\/span>\n        Pass {<\/span>\n            Name \"FORWARD\"<\/span>\n            Tags {<\/span>\n                \"LightMode\"=\"ForwardBase\"<\/span>\n            }<\/span>\n            <\/span>\n            CGPROGRAM<\/span>\n            #pragma vertex vert<\/span>\n            #pragma fragment frag<\/span>\n            #include \"UnityCG.cginc\"<\/span>\n            #pragma multi_compile_fwdbase_fullshadows<\/span>\n            #pragma target 3.0<\/span>\n            <\/span>\n            \/\/ \u58f0\u660e\u53d8\u91cf<\/span>\n            uniform sampler2D _NormalMap;<\/span>\n            uniform sampler2D _Matcap;<\/span>\n            uniform float _FresnelPow;<\/span>\n            uniform float _EnvSpecInt;<\/span>\n            <\/span>\n            \/\/ \u8f93\u5165\u7ed3\u6784<\/span>\n            struct VertexInput {<\/span>\n                float4 vertex : POSITION;<\/span>\n                float3 normal : NORMAL;<\/span>\n                float2 uv0 : TEXCOORD0;<\/span>\n                float4 tangent : TANGENT;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u8f93\u51fa\u7ed3\u6784<\/span>\n            struct VertexOutput {<\/span>\n                float4 pos : SV_POSITION;<\/span>\n                float2 uv0 : TEXCOORD0;<\/span>\n                float3 posWS : TEXCOORD1;<\/span>\n                float3 nDirWS : TEXCOORD2;<\/span>\n                float3 tDirWS : TEXCOORD3;<\/span>\n                float3 bDirWS : TEXCOORD4;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u9876\u70b9shader<\/span>\n            VertexOutput vert (VertexInput v) {<\/span>\n                VertexOutput o = (VertexOutput)0;<\/span>\n                o.pos = UnityObjectToClipPos( v.vertex );<\/span>\n                o.uv0 = v.uv0;<\/span>\n                o.posWS = mul(unity_ObjectToWorld, v.vertex);<\/span>\n                o.nDirWS = UnityObjectToWorldNormal(v.normal);<\/span>\n                o.tDirWS = normalize(mul(unity_ObjectToWorld, float4(v.tangent.xyz, 0.0)).xyz);<\/span>\n                o.bDirWS = normalize(cross(o.nDirWS, o.tDirWS) * v.tangent.w);<\/span>\n                return o;<\/span>\n            }<\/span>\n            <\/span>\n            \/\/ \u50cf\u7d20shader<\/span>\n            float4 frag(VertexOutput i) : COLOR {<\/span>\n                \/\/ \u8ba1\u7b97Fresnel<\/span>\n                float3 nDirTS = UnpackNormal(tex2D(_NormalMap, i.uv0)).rgb;<\/span>\n                float3x3 TBN = float3x3(i.tDirWS, i.bDirWS, i.nDirWS);<\/span>\n                float3 nDirWS = normalize(mul(nDirTS, TBN));<\/span>\n                float3 vDirWS = normalize(_WorldSpaceCameraPos.xyz - i.posWS.xyz);  <\/span>\n                float vDotn = dot(vDirWS, nDirWS);<\/span>\n<\/span>\n                \/\/ \u8ba1\u7b97MatcapUV<\/span>\n                float3 nDirVS = mul(UNITY_MATRIX_V, nDirWS);   <\/span>\n                float2 matcapUV = nDirVS.rg * 0.5 + 0.5;<\/span>\n                <\/span>\n                \/\/ \u5149\u7167\u6a21\u578b<\/span>\n                float3 matcap = tex2D(_Matcap, matcapUV); <\/span>\n                float fresnel = pow(max(0.0, 1.0 - vDotn), _FresnelPow);<\/span>\n                float3 finalRGB = matcap * fresnel * _EnvSpecInt;<\/span>\n   <\/span>\n                return float4(finalRGB, 1.0);<\/span>\n            }<\/span>\n            ENDCG<\/span>\n        }<\/span>\n    }<\/span>\n    FallBack \"Diffuse\"<\/span>\n}<\/span>\n<\/pre>\n\n\n\n
\u7531\u4e8e\u4f7f\u7528\u4e86\u6cd5\u7ebf\u8d34\u56fe\uff0cshader\u4ee3\u7801\u4e2d\u4e5f\u9700\u8981\u5bf9\u6cd5\u7ebf\u7684\u7a7a\u95f4\u8fdb\u884c\u8f6c\u6362\uff0cfresnel\u7684\u8ba1\u7b97\u90e8\u5206\u4f1a\u66f4\u590d\u6742\u4e00\u4e9b\u3002<\/p>\n
 <\/h1>\n
\u73af\u5883\u53cd\u5c04\u4e4bCubemap<\/h1>\n
\u5f53\u89c2\u5bdf\u89c6\u89d2\u662f\u53ef\u79fb\u52a8\u7684\u65f6\uff0cMatcap\u65b9\u5f0f\u5c31\u5f88\u96be\u6ee1\u8db3\u73af\u5883\u53cd\u5c04\u7684\u8981\u6c42\u4e86\uff0c\u6b64\u65f6\u53ef\u4ee5\u901a\u8fc7Cubemap\u65b9\u5f0f\u6a21\u62df\u73af\u5883\u53cd\u5c04\u3002<\/p>\n
\u539f\u7406\u548cMatcap\u7c7b\u4f3c\uff0c\u53ea\u662f\u73af\u5883\u8d34\u56fe\u4e0d\u662f\u4ec5\u4ec5\u6620\u5c04\u5230\u7269\u4f53\u6b63\u9762\uff0c\u800c\u662f\u4ee5\u5168\u666f\u56fe\u65b9\u5f0f\u5305\u88f9\u7269\u4f53\u5168\u90e8\uff0c\u4f8b\u5982\u4e0b\u56fe\u5c31\u662f\u4e00\u79cd\u5e38\u7528\u7684Latitude-Longitude\u683c\u5f0f\u7684\u73af\u5883\u8d34\u56fe\uff0c\u4e5f\u79f0\u4e3aSpherical Map\u3002<\/p>\n
\"\"<\/p>\n
\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0cCubemap\u662f\u5c06\u73af\u5883\u8d34\u56fe\u5207\u5206\u4e3a6\u4e2a\u4e0d\u540c\u89d2\u5ea6\u7684\u8d34\u56fe\uff0c\u518d\u5bf9\u7269\u4f53\u8fdb\u884c\u6295\u5c04\uff0c\u4f8b\u5982\u4e0b\u56fe\u5c31\u662fSpherical Map\u7c7b\u578b\u7684\u73af\u5883\u8d34\u56fe\u7684\u5207\u5206\u548c\u6295\u5c04\u65b9\u5f0f\u3002<\/p>\n
\"\"<\/p>\n
\u8fd8\u6709\u4e00\u79cdCubemap\u7c7b\u578b\u5219\u662f\u7acb\u65b9\u4f53\u5c55\u5f00\u5f62\u5f0f\uff0c\u901a\u79f0\u4e3aCubic Map\uff0c\u4f8b\u5982\u4e0b\u56fe\u3002<\/p>\n
\"\"<\/p>\n
\u663e\u7136\u4e24\u79cd\u8d34\u56fe\u5f62\u5f0f\u662f\u53ef\u4ee5\u4e92\u76f8\u8f6c\u5316\u7684\uff0c\u6700\u7ec8\u7684\u4f7f\u7528\u65b9\u5f0f\u76f8\u540c\uff0cSpherical Map\u7c7b\u578b\u7684\u73af\u5883\u8d34\u56fe\u4e0a\u4e0b\u65b9\u4f1a\u6709\u62c9\u4f38\u53d8\u5f62\uff0c\u800cCubic Map\u7c7b\u578b\u7684\u73af\u5883\u8d34\u56fe\u5219\u4f1a\u6709\u8f83\u5927\u7684\u7a7a\u767d\u533a\u57df\uff0c\u6d6a\u8d39\u8d34\u56fe\u6027\u80fd\uff0c\u56e0\u6b64\u5b9e\u9645\u4f7f\u7528\u4e2dSpherical Map\u7c7b\u578b\u66f4\u4e3a\u5e38\u7528\u3002<\/p>\n
\u5728Unity\u4e2d\u4f7f\u7528Cube Map\u73af\u5883\u8d34\u56fe\u9700\u8981\u901a\u8fc7\u4ee5\u4e0b\u8bbe\u7f6e\u4fee\u6539\u4e3aCubemap\u8d34\u56fe\u3002<\/p>\n
\"\"<\/p>\n
\u6ce8\u610fMapping\u53c2\u6570\u7528\u4e8e\u8bbe\u7f6eCubemap\u7684\u7c7b\u578b\uff0c\u5f53\u524d\u4e3aSpherical Map\u7c7b\u578b\uff0cCubic Map\u9700\u8981\u8bbe\u7f6e\u4e3a6 Frames Layout\uff08Cubic Environment\uff09\u3002<\/p>\n
\u5728Unity\u4e2d\u4f7f\u7528\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n
\"\"<\/p>\n
\u5176\u4e2dCubemap\u8282\u70b9\u8f93\u5165\u7684DIR\u53c2\u6570\u4e3a\u89c2\u5bdf\u65b9\u5411\u7684\u53cd\u5c04\u65b9\u5411\uff0cMIP\u53c2\u6570\u7528\u4e8e\u63a7\u5236Cubemap\u8d34\u56fe\u7684Mipmap\u7b49\u7ea7\uff0c\u53c2\u6570\u8d8a\u9ad8\uff0c\u5f97\u5230\u7684\u73af\u5883\u53cd\u5c04\u8d8a\u6a21\u7cca\u3002<\/p>\n
\u5728UE4\u4e2d\u8fde\u63a5\u5982\u4e0b\uff1a\"\"<\/p>\n
\u5728Unity\u4e2d\u7684shader\u4ee3\u7801\u5982\u4e0b\u3002<\/p>\n\n\n\n
\/\/ shader\u7684\u8def\u5f84\u548c\u540d\u79f0<\/span>\nShader \"Shader Forge\/cubemap\" {<\/span>\n    \/\/ \u66b4\u9732\u5c5e\u6027\u5230\u9762\u677f<\/span>\n    Properties {<\/span>\n        _Cubemap   (\"Cubemap\", Cube) = \"_skybox\" {}<\/span>\n        _NormalMap (\"Normal Map\", 2D) = \"bump\" {}<\/span>\n        _CubemapMip(\"Cubemap Mip\",Range(0, 7)) = 0<\/span>\n        _FresnelPow(\"Fresnel Pow\", Range(0, 10)) = 1<\/span>\n        _EnvSpecInt(\"EnvSpecInt\", Range(0, 5)) = 1<\/span>\n    }<\/span>\n    SubShader {<\/span>\n        Tags {<\/span>\n            \"RenderType\"=\"Opaque\"<\/span>\n        }<\/span>\n        Pass {<\/span>\n            Name \"FORWARD\"<\/span>\n            Tags {<\/span>\n                \"LightMode\"=\"ForwardBase\"<\/span>\n            }<\/span>\n            <\/span>\n            CGPROGRAM<\/span>\n            #pragma vertex vert<\/span>\n            #pragma fragment frag<\/span>\n            #include \"UnityCG.cginc\"<\/span>\n            #pragma multi_compile_fwdbase_fullshadows<\/span>\n            #pragma target 3.0<\/span>\n            <\/span>\n            \/\/ \u58f0\u660e\u53d8\u91cf<\/span>\n            uniform samplerCUBE _Cubemap;<\/span>\n            uniform sampler2D _NormalMap;<\/span>\n            uniform float _CubemapMip;<\/span>\n            uniform float _FresnelPow;<\/span>\n            uniform float _EnvSpecInt;<\/span>\n            <\/span>\n            \/\/ \u8f93\u5165\u7ed3\u6784<\/span>\n            struct VertexInput {<\/span>\n                float4 vertex : POSITION;<\/span>\n                float3 normal : NORMAL;<\/span>\n                float2 uv0 : TEXCOORD0;<\/span>\n                float4 tangent : TANGENT;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u8f93\u51fa\u7ed3\u6784<\/span>\n            struct VertexOutput {<\/span>\n                float4 pos : SV_POSITION;<\/span>\n                float2 uv0 : TEXCOORD0;<\/span>\n                float3 posWS : TEXCOORD1;<\/span>\n                float3 nDirWS : TEXCOORD2;<\/span>\n                float3 tDirWS : TEXCOORD3;<\/span>\n                float3 bDirWS : TEXCOORD4;<\/span>\n            };<\/span>\n            <\/span>\n            \/\/ \u9876\u70b9shader<\/span>\n            VertexOutput vert (VertexInput v) {<\/span>\n                VertexOutput o = (VertexOutput)0;<\/span>\n                o.pos = UnityObjectToClipPos( v.vertex );<\/span>\n                o.uv0 = v.uv0;<\/span>\n                o.posWS = mul(unity_ObjectToWorld, v.vertex);<\/span>\n                o.nDirWS = UnityObjectToWorldNormal(v.normal);<\/span>\n                o.tDirWS = normalize(mul(unity_ObjectToWorld, float4(v.tangent.xyz, 0.0)).xyz);<\/span>\n                o.bDirWS = normalize(cross(o.nDirWS, o.tDirWS) * v.tangent.w);<\/span>\n                return o;<\/span>\n            }<\/span>\n            <\/span>\n            \/\/ \u50cf\u7d20shader<\/span>\n            float4 frag(VertexOutput i) : COLOR {<\/span>\n                \/\/ \u8ba1\u7b97Fresnel<\/span>\n                float3 nDirTS = UnpackNormal(tex2D(_NormalMap, i.uv0)).rgb;<\/span>\n                float3x3 TBN = float3x3(i.tDirWS, i.bDirWS, i.nDirWS);<\/span>\n                float3 nDirWS = normalize(mul(nDirTS, TBN));<\/span>\n                float3 vDirWS = normalize(_WorldSpaceCameraPos.xyz - i.posWS.xyz);  <\/span>\n                float vDotn = dot(vDirWS, nDirWS);<\/span>\n                <\/span>\n                \/\/ \u5149\u7167\u6a21\u578b<\/span>\n                float3 vrDirWS = reflect(-vDirWS, nDirWS);<\/span>\n                float3 var_Cubemap = texCUBElod(_Cubemap, float4(vrDirWS, _CubemapMip)).rgb; <\/span>\n                float fresnel = pow(max(0.0, 1.0 - vDotn), _FresnelPow);<\/span>\n                float3 finalRGB = var_Cubemap * fresnel * _EnvSpecInt;<\/span>\n   <\/span>\n                return float4(finalRGB, 1.0);<\/span>\n            }<\/span>\n            ENDCG<\/span>\n        }<\/span>\n    }<\/span>\n    FallBack \"Diffuse\"<\/span>\n}<\/span>\n<\/pre>\n\n\n\n
\u8fd9\u79cd\u65b9\u5f0f\u867d\u7136\u5728\u81ea\u7531\u79fb\u52a8\u89c2\u5bdf\u89c6\u89d2\u65f6\u4e5f\u80fd\u5f97\u5230\u4e0d\u9519\u7684\u53cd\u5c04\u6548\u679c\uff0c\u4f46\u5f53\u573a\u666f\u4e2d\u7684\u5149\u6e90\u6216\u7269\u4f53\u53d1\u751f\u4fee\u6539\u6216\u79fb\u52a8\u540e\uff0c\u5c31\u9700\u8981\u91cd\u65b0\u751f\u6210\u73af\u5883\u8d34\u56fe\uff1b\u5e76\u4e14\u53ea\u80fd\u53cd\u5c04\u73af\u5883\uff0c\u4e0d\u80fd\u53cd\u5c04\u7269\u4f53\u672c\u8eab\uff0c\u4f8b\u5982\u4e24\u4e2a\u5149\u6ed1\u91d1\u5c5e\u7403\u4e4b\u95f4\u4e92\u76f8\u591a\u6b21\u53cd\u5c04\u3002<\/p>\n
\u8fd9\u65f6\u5982\u679c\u9700\u8981\u83b7\u5f97\u66f4\u771f\u5b9e\u7684\u53cd\u5c04\u6548\u679c\uff0c\u5c31\u5f97\u8017\u8d39\u66f4\u591a\u6027\u80fd\u4f7f\u7528\u5168\u5c40\u5149\u7167\u7cfb\u7edf\u5b9e\u73b0\u73af\u5883\u53cd\u5c04\u3002<\/p>\n
 <\/p>\n
\u672c\u6587\u540c\u6837\u53c2\u8003\u81eaB\u7ad9\u5e84\u61c2\u7684\u6280\u672f\u7f8e\u672f\u5165\u95e8\u8bfe<\/a>\uff0c\u611f\u8c22\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e00\u4e2a\u76f8\u4fe1\u7ae5\u8bdd\u7684\u5b69\u5b50\uff0c
\u5373\u4f7f\u5230\u4e86\u4e0d\u518d\u76f8\u4fe1\u7ae5\u8bdd\u7684\u5e74\u9f84\uff0c
\u4ecd\u662f\u66f4\u5bb9\u6613\u76f8\u4fe1\u5584\u826f\u548c\u62d2\u7edd\u51b7\u9177\u7684\u3002<\/p>\n
\u300a\u5b9d\u8d1d\uff0c\u5b9d\u8d1d\u300b
\u2014\u2014\u5468\u56fd\u5e73<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u4e4b\u524d\u66f4\u65b0\u8fc7\u4e24\u7bc7\u5149\u7167\u6a21\u578b\u57fa\u7840\u4e4bLambert\u548cPhong\u4e0eBlinn-Phong\uff0c\u5b9e\u9645\u4e0a\u57281973\u5e74\u88f4\u7965\u98ce […]<\/p>\n","protected":false},"author":1,"featured_media":3025,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,69],"tags":[71,43,14,72],"_links":{"self":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts\/3006"}],"collection":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3006"}],"version-history":[{"count":0,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts\/3006\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/media\/3025"}],"wp:attachment":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}