{"id":304458,"date":"2024-05-20T19:23:13","date_gmt":"2024-05-20T11:23:13","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/304458.html"},"modified":"2024-05-20T19:23:27","modified_gmt":"2024-05-20T11:23:27","slug":"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a1%ae%e7%90%86%e8%a7%a3-brdf-%ef%bc%88%e5%8f%8c%e5%90%91%e5%8f%8d%e5%b0%84%e5%88%86%e5%b8%83%e5%87%bd%e6%95%b0%ef%bc%89","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/304458.html","title":{"rendered":"\u5982\u4f55\u6b63\u786e\u7406\u89e3 BRDF \uff08\u53cc\u5411\u53cd\u5c04\u5206\u5e03\u51fd\u6570\uff09"},"content":{"rendered":"

\"\u5982\u4f55\u6b63\u786e\u7406\u89e3<\/p>\n

\u53cc\u5411\u53cd\u5c04\u5206\u5e03\u51fd\u6570\uff08BRDF\uff09\u662f\u7406\u89e3\u7269\u4f53\u8868\u9762\u5149\u5b66\u5c5e\u6027\u7684\u5173\u952e\u6982\u5ff5\uff0c\u7528\u4e8e\u63cf\u8ff0\u5149\u7ebf\u5728\u7269\u4f53\u8868\u9762\u7684\u53cd\u5c04\u7279\u6027\u3002BRDF\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6750\u6599\u8868\u9762\u5bf9\u5149\u7ebf\u7684\u6563\u5c04\u884c\u4e3a<\/strong>\u3001\u4f9d\u8d56\u4e8e\u56db\u4e2a\u53d8\u91cf\uff1a\u5165\u5c04\u5149\u65b9\u5411\u3001\u53cd\u5c04\u5149\u65b9\u5411\u3001\u6750\u6599\u7684\u5fae\u89c2\u7ed3\u6784\u4ee5\u53ca\u6ce2\u957f\u3002\u5176\u4e2d\uff0c\u63cf\u8ff0\u6750\u6599\u7684\u5fae\u89c2\u7ed3\u6784\u662f\u7406\u89e3BRDF\u7684\u6838\u5fc3<\/strong>\uff0c\u56e0\u4e3a\u8fd9\u6d89\u53ca\u5230\u5149\u7ebf\u5982\u4f55\u4e0e\u7269\u4f53\u8868\u9762\u7684\u5fae\u5c0f\u51f9\u51f8\u8fdb\u884c\u76f8\u4e92\u4f5c\u7528\u3002<\/p>\n<\/p>\n

\u4e00\u3001BRDF\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/p>\n

\u53cc\u5411\u53cd\u5c04\u5206\u5e03\u51fd\u6570\uff08BRDF\uff09\u63cf\u8ff0\u4e86\u5149\u7ebf\u4ece\u4e00\u4e2a\u65b9\u5411\u5165\u5c04\u5728\u6750\u6599\u8868\u9762\uff0c\u5e76\u4ee5\u53e6\u4e00\u4e2a\u65b9\u5411\u53cd\u5c04\u7684\u6548\u7387\u3002\u7406\u89e3BRDF\u9996\u5148\u9700\u8981\u638c\u63e1\u5b83\u7684\u57fa\u672c\u516c\u5f0f\u8868\u793a\uff0c\u5b83\u88ab\u5b9a\u4e49\u4e3a\u53cd\u5c04\u8f90\u5c04\u4eae\u5ea6\u4e0e\u5165\u5c04\u8f90\u7167\u5ea6\u4e4b\u6bd4\uff0c\u4e0e\u5165\u5c04\u89d2\u548c\u53cd\u5c04\u89d2\u7684\u51fd\u6570\u3002<\/p>\n<\/p>\n

\u516c\u5f0f\u89e3\u91ca<\/h4>\n<\/p>\n

BRDF\u7684\u516c\u5f0f\u901a\u5e38\u8868\u793a\u4e3a(f_r(\u03c9_i, \u03c9_r))\uff0c\u5176\u4e2d(\u03c9_i)\u662f\u5165\u5c04\u5149\u65b9\u5411\uff0c(\u03c9_r)\u662f\u53cd\u5c04\u5149\u65b9\u5411\u3002\u638c\u63e1\u8fd9\u4e2a\u6bd4\u4f8b\u5173\u7cfb\u6709\u52a9\u4e8e\u6211\u4eec\u7406\u89e3\u7269\u4f53\u8868\u9762\u5bf9\u5149\u7ebf\u7684\u53cd\u5c04\u7279\u6027\uff0c\u8fd9\u5bf9\u4e8e\u6750\u6599\u79d1\u5b66\u3001\u8ba1\u7b97\u673a\u56fe\u5f62\u5b66\u7b49\u9886\u57df\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u7269\u7406\u610f\u4e49<\/h4>\n<\/p>\n

BRDF\u53cd\u6620\u4e86\u5149\u7ebf\u4e0e\u7269\u4f53\u76f8\u4e92\u4f5c\u7528\u7684\u590d\u6742\u673a\u5236\uff0c\u5305\u62ec\u6298\u5c04\u3001\u53cd\u5c04\u3001\u5438\u6536\u7b49\u8fc7\u7a0b\u3002\u5b83\u5e2e\u52a9\u6211\u4eec\u5b9a\u91cf\u5206\u6790\u6750\u6599\u8868\u9762\u7684\u5149\u5b66\u6027\u8d28\uff0c\u8fdb\u800c\u51c6\u786e\u6a21\u62df\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u5149\u5f71\u6548\u679c\u3002<\/p>\n<\/p>\n

\u4e8c\u3001BRDF\u7684\u91cd\u8981\u6027<\/h3>\n<\/p>\n

\u5728\u8ba1\u7b97\u673a\u56fe\u5f62\u5b66\u4e2d\uff0c\u6b63\u786e\u5229\u7528BRDF\u6a21\u578b\u5bf9\u5149\u7ebf\u8fdb\u884c\u6a21\u62df\u662f\u5b9e\u73b0\u771f\u5b9e\u611f\u6e32\u67d3\u7684\u5173\u952e\u3002BRDF\u4e0d\u4ec5\u51b3\u5b9a\u4e86\u7269\u4f53\u7684\u989c\u8272\uff0c\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5b83\u51b3\u5b9a\u4e86\u7269\u4f53\u5728\u4e0d\u540c\u5149\u7167\u6761\u4ef6\u4e0b\u7684\u5916\u89c2\u53d8\u5316\u3002<\/p>\n<\/p>\n

\u771f\u5b9e\u611f\u6e32\u67d3<\/h4>\n<\/p>\n

\u4f7f\u7528BRDF\u53ef\u4ee5\u6a21\u62df\u5404\u79cd\u6750\u8d28\u5982\u91d1\u5c5e\u3001\u5e03\u6599\u7b49\u7684\u7279\u6709\u5149\u6cfd\u548c\u8d28\u611f\u3002\u901a\u8fc7\u5bf9BRDF\u7684\u7cbe\u786e\u8ba1\u7b97\uff0c\u6e32\u67d3\u51fa\u7684\u56fe\u50cf\u80fd\u591f\u63a5\u8fd1\u4e8e\u771f\u5b9e\u4e16\u754c\u4e2d\u7684\u89c6\u89c9\u6548\u679c\u3002<\/p>\n<\/p>\n

\u6750\u6599\u8bc6\u522b\u4e0e\u5206\u6790<\/h4>\n<\/p>\n

\u5728\u6750\u6599\u79d1\u5b66\u4e2d\uff0c\u901a\u8fc7\u6d4b\u91cf\u6750\u6599\u8868\u9762\u7684BRDF\u53ef\u4ee5\u53cd\u5411\u63a8\u65ad\u51fa\u6750\u6599\u7684\u6027\u8d28\uff0c\u5982\u7c97\u7cd9\u5ea6\u3001\u5438\u5149\u6027\u7b49\u3002\u8fd9\u5bf9\u4e8e\u65b0\u6750\u6599\u7684\u5f00\u53d1\u548c\u73b0\u6709\u6750\u6599\u7684\u6539\u826f\u5177\u6709\u91cd\u8981\u610f\u4e49\u3002<\/p>\n<\/p>\n

\u4e09\u3001BRDF\u6a21\u578b<\/h3>\n<\/p>\n

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\u7406\u8bba\u6a21\u578b<\/h4>\n<\/p>\n

Phong\u6a21\u578b\u3001Blinn-Phong\u6a21\u578b\u548cCook-Torrance\u6a21\u578b\u7b49\u662f\u8ba1\u7b97\u673a\u56fe\u5f62\u5b66\u4e2d\u5e38\u89c1\u7684BRDF\u6a21\u578b\u3002\u8fd9\u4e9b\u6a21\u578b\u901a\u8fc7\u7b80\u5316\u5047\u8bbe\uff0c\u65e8\u5728\u5e73\u8861\u8ba1\u7b97\u590d\u6742\u5ea6\u548c\u6e32\u67d3\u6548\u679c\u7684\u771f\u5b9e\u6027\u3002<\/p>\n<\/p>\n

\u6570\u636e\u9a71\u52a8\u6a21\u578b<\/h4>\n<\/p>\n

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\u56db\u3001\u5b9e\u9645\u5e94\u7528\u6848\u4f8b<\/h3>\n<\/p>\n

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\u7535\u5f71\u5236\u4f5c<\/h4>\n<\/p>\n

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\u6e38\u620f\u5f00\u53d1<\/h4>\n<\/p>\n

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\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

1. BRDF\u662f\u4ec0\u4e48\uff0c\u5b83\u5728\u5149\u5b66\u4e2d\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/strong>
\nBRDF\u662f\u53cc\u5411\u53cd\u5c04\u5206\u5e03\u51fd\u6570\u7684\u7f29\u5199\uff0c\u5b83\u63cf\u8ff0\u4e86\u5149\u7ebf\u4ece\u8868\u9762\u5c04\u51fa\u6216\u88ab\u8868\u9762\u53cd\u5c04\u65f6\u7684\u5206\u5e03\u60c5\u51b5\u3002\u5728\u5149\u5b66\u4e2d\uff0cBRDF\u7528\u4e8e\u63cf\u8ff0\u5149\u7ebf\u5728\u7269\u4f53\u8868\u9762\u4e0a\u7684\u53cd\u5c04\u6027\u8d28\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u7406\u89e3\u5149\u7ebf\u5982\u4f55\u5728\u4e0d\u540c\u7269\u4f53\u8868\u9762\u95f4\u4f20\u64ad\u548c\u53cd\u5c04\uff0c\u4ece\u800c\u5f71\u54cd\u5230\u7269\u4f53\u7684\u8868\u9762\u5149\u7167\u6548\u679c\u3002<\/p>\n

2. BRDF\u7684\u7ec4\u6210\u90e8\u5206\u6709\u54ea\u4e9b\uff0c\u5b83\u4eec\u5206\u522b\u662f\u5982\u4f55\u5f71\u54cd\u5149\u7ebf\u7684\u53cd\u5c04\uff1f<\/strong>
\nBRDF\u5305\u542b\u4e86\u56db\u4e2a\u7ec4\u6210\u90e8\u5206\uff1a\u53cd\u5c04\u7387\u3001\u5165\u5c04\u89d2\u3001\u89c6\u89d2\u548c\u51e0\u4f55\u56e0\u5b50\u3002\u53cd\u5c04\u7387\u51b3\u5b9a\u4e86\u8868\u9762\u5bf9\u4e0d\u540c\u989c\u8272\u5149\u7ebf\u53cd\u5c04\u7684\u5f3a\u5ea6\uff0c\u5165\u5c04\u89d2\u63cf\u8ff0\u4e86\u5149\u7ebf\u4e0e\u8868\u9762\u7684\u5165\u5c04\u5173\u7cfb\uff0c\u89c6\u89d2\u63cf\u8ff0\u4e86\u89c2\u5bdf\u8005\u4e0e\u8868\u9762\u7684\u89c6\u89d2\u5173\u7cfb\uff0c\u800c\u51e0\u4f55\u56e0\u5b50\u63cf\u8ff0\u4e86\u8868\u9762\u7684\u51e0\u4f55\u5f62\u72b6\u5bf9\u5149\u7ebf\u53cd\u5c04\u7684\u5f71\u54cd\u3002\u8fd9\u4e9b\u56e0\u7d20\u7684\u7ec4\u5408\u5f71\u54cd\u4e86\u5149\u7ebf\u4ece\u8868\u9762\u53cd\u5c04\u51fa\u7684\u5f3a\u5ea6\u548c\u5206\u5e03\u65b9\u5f0f\u3002<\/p>\n

3. \u5982\u4f55\u6b63\u786e\u7406\u89e3\u548c\u4f7f\u7528BRDF\u6765\u6a21\u62df\u771f\u5b9e\u4e16\u754c\u4e2d\u7684\u5149\u7167\u6548\u679c\uff1f<\/strong>
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