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\/><\/p>\n<p>\u6298\u5c04\u6750\u8d28\u5f80\u5f80\u4e5f\u6709\u90e8\u5206\u53cd\u5c04\uff0c\u5149\u7ebf\u5728\u7a7f\u8fc7\u4e24\u79cd\u900f\u660e\u4ecb\u8d28\u4e4b\u95f4\u7684\u5e73\u9762\u65f6\uff0c\u90e8\u5206\u80fd\u91cf\u4f1a\u6298\u5c04\u5165\u7269\u4f53\u5185\u90e8\uff0c\u5176\u4f59\u7684\u80fd\u91cf\u4f1a\u53cd\u5c04\u51fa\u53bb\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4934 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_07.jpg\" alt=\"\" width=\"904\" height=\"603\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_07.jpg 904w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_07-300x200.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_07-768x512.jpg 768w\" sizes=\"(max-width: 904px) 100vw, 904px\" \/><\/p>\n<p>\u5728\u6298\u5c04\u65f6\u5165\u5c04\u89d2<strong>\u03b8<sub>i<\/sub><\/strong>\u4e0e\u6298\u5c04\u89d2<strong>\u03b8<sub>t<\/sub><\/strong>\u7684\u5173\u7cfb\u4e0e\u5e73\u9762\u4e24\u4fa7\u900f\u660e\u4ecb\u8d28\u7684\u6298\u5c04\u7387\u6709\u5173\uff0c\u5f53\u5149\u7ebf\u4ece\u6298\u5c04\u7387\u5c0f\u7684\u900f\u660e\u7269\u4f53\uff08\u4f8b\u5982\u7a7a\u6c14\uff09\u5c04\u5165\u6298\u5c04\u7387\u5927\u7684\u900f\u660e\u7269\u4f53\uff08\u4f8b\u5982\u6c34\uff09\u4e2d\u65f6\uff0c\u6298\u5c04\u89d2\u4f1a\u5c0f\u4e8e\u5165\u5c04\u89d2\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4935 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11.jpg\" alt=\"\" width=\"426\" height=\"490\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11.jpg 426w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11-261x300.jpg 261w\" sizes=\"(max-width: 426px) 100vw, 426px\" \/><\/p>\n<p>\u90a3\u4e48\u5982\u679c\u53cd\u8fc7\u6765\uff0c\u5149\u7ebf\u4ece\u6298\u5c04\u7387\u5927\u7684\u900f\u660e\u7269\u4f53\u8fdb\u5165\u5230\u6298\u5c04\u7387\u5c0f\u7684\u7269\u4f53\u65f6\uff0c\u540c\u65f6\u4f1a\u53d1\u751f\u6298\u5c04\u548c\u53cd\u5c04\uff0c\u5165\u5c04\u89d2\u4f1a\u5c0f\u4e8e\u6298\u5c04\u89d2\uff0c\u90a3\u4e48\u968f\u7740\u5165\u5c04\u89d2\u589e\u5927\uff0c\u6298\u5c04\u89d2\u4e5f\u4f1a\u589e\u5927\uff0c\u6298\u5c04\u5149\u7ebf\u80fd\u91cf\u51cf\u5f31\uff0c\u53cd\u5c04\u5149\u7ebf\u80fd\u91cf\u589e\u5f3a\uff0c\u76f4\u5230\u6298\u5c04\u89d2\u8fbe\u523090\u5ea6\uff0c\u6298\u5c04\u5149\u7ebf\u5b8c\u5168\u6d88\u5931\uff0c\u6240\u6709\u80fd\u91cf\u90fd\u4f1a\u53cd\u5c04\uff0c\u8fd9\u5c31\u662f\u6240\u8c13\u7684\u5168\u53cd\u5c04\u73b0\u8c61\uff08Total Internal Reflection\uff09\uff0c\u7528\u4e8e\u901a\u4fe1\u670d\u52a1\u7684\u5149\u7ea4\u5c31\u662f\u6839\u636e\u5168\u53cd\u5c04\u539f\u7406\u5236\u6210\u7684\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4936 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_12.png\" alt=\"\" width=\"1280\" height=\"847\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_12.png 1280w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_12-300x199.png 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_12-1024x678.png 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_12-768x508.png 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u5e38\u89c1\u7269\u4f53\u7684\u6298\u5c04\u7387\u5982\u4e0b\uff1a<\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: 184px;\">\n<tbody>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u771f\u7a7a<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.0000<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u7a7a\u6c14<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.00029<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u51b0<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.3090<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u6c34\uff0820\u00b0C\uff09<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.3333<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u73bb\u7483<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.5~1.6<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u6c34\u6676<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.544\uff5e1.553<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u7ea2\u5b9d\u77f3\u3001\u84dd\u5b9d\u77f3<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">1.7700<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"width: 12.3809%; height: 23px;\">\u94bb\u77f3<\/td>\n<td style=\"width: 62.6191%; height: 23px;\">2.4170<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6298\u5c04\u65b9\u5411\u7684\u8ba1\u7b97\u662f\u7531<a href=\"https:\/\/baike.baidu.com\/item\/%E6%8A%98%E5%B0%84%E5%AE%9A%E5%BE%8B\/906357\">\u6298\u5c04\u5b9a\u7406<\/a>(Snell\u2019s Law)\u5f97\u6765\u7684\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4946 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_15.jpg\" alt=\"\" width=\"557\" height=\"105\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_15.jpg 557w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_15-300x57.jpg 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/p>\n<p>\u5176\u4e2dni\uff0cnt\u5206\u522b\u4ee3\u8868\u5e73\u9762\u4e24\u8fb9\u900f\u660e\u4ecb\u8d28\u7684\u6298\u5c04\u7387\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u4e0a\u534a\u90e8\u5206\u4e3ani\uff0c\u4e0b\u534a\u90e8\u5206\u4e3ant\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4935 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11.jpg\" alt=\"\" width=\"426\" height=\"490\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11.jpg 426w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_11-261x300.jpg 261w\" sizes=\"(max-width: 426px) 100vw, 426px\" \/><\/p>\n<p>\u6839\u636e\u4e09\u89d2\u51fd\u6570\u7684\u5173\u7cfb<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4947 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_16.jpg\" alt=\"\" width=\"308\" height=\"71\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_16.jpg 308w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_16-300x69.jpg 300w\" sizes=\"(max-width: 308px) 100vw, 308px\" \/><\/p>\n<p>\u4ee5\u53ca\u524d\u9762\u7684\u6298\u5c04\u5b9a\u7406\uff0c\u5f97\u5230\u6298\u5c04\u89d2\u7684\u4f59\u5f26\u503ccos\u03b8t<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4948 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_17.jpg\" alt=\"\" width=\"626\" height=\"413\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_17.jpg 626w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_17-300x198.jpg 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/p>\n<p>\u6ce8\u610f\uff0c\u8fd9\u91cc\u662f\u6709\u6c42\u5e73\u65b9\u6839\u64cd\u4f5c\u7684\uff0c\u800c\u5f53\u6839\u53f7\u5185\u5c0f\u4e8e0\u65f6\u6c42\u5e73\u65b9\u6839\u662f\u65e0\u610f\u4e49\u7684\uff0c\u90a3\u4e48\u6839\u53f7\u5185\u4f1a\u6709\u5c0f\u4e8e0\u7684\u60c5\u51b5\u5417\uff1f<\/p>\n<p>\u663e\u7136\uff0c\u5f53ni\/nt\u5927\u4e8e1\uff0c\u5e76\u4e14<strong>\u03b8<sub>i<\/sub><\/strong>\u7684\u6bd4\u8f83\u5927\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u6c42\u6298\u5c04\u89d2\u65e0\u610f\u4e49\u7684\u60c5\u51b5\uff0c\u4e5f\u5c31\u662f\u524d\u9762\u6240\u8bf4\u7684\u5168\u53cd\u5c04\u73b0\u8c61\u4e86\u3002<\/p>\n<p>\u5bf9\u4e8e\u6298\u5c04\u6765\u8bf4<strong>BRDF<\/strong>\uff08Bidirectional Reflectance Distribution Function\uff0c\u53cc\u5411\u53cd\u5c04\u5206\u5e03\u51fd\u6570 \uff09\u81ea\u7136\u5c31\u4e0d\u9002\u7528\u4e86\uff0c\u6298\u5c04\u9002\u7528\u4e8e<strong>BTDF<\/strong>\uff08Bidirectional Transmittance Distribution Function\uff0c\u53cc\u5411\u900f\u5c04\u5206\u5e03\u51fd\u6570 \uff09\uff0c\u4e24\u8005\u53ef\u4ee5\u7edf\u79f0\u4e3a<strong>BSDF<\/strong>\uff08Bidirectional Scattering Distribution Function\uff0c\u53cc\u5411\u6563\u5c04\u5206\u5e03\u51fd\u6570\uff09\u3002<\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u83f2\u6d85\u5c14\u53cd\u5c04\uff08Fresnel Reflection\uff09<\/h1>\n<p>\u5165\u5c04\u5149\u7ebf\u4e0e\u5e73\u9762\u7684\u5939\u89d2\u9664\u4e86\u5f71\u54cd\u6298\u5c04\u7684\u6548\u679c\u4ee5\u5916\uff0c\u4e5f\u5f71\u54cd\u53cd\u5c04\u7684\u6548\u679c\uff0c\u4f8b\u5982\u4e0b\u56fe<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4956 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_18.jpg\" alt=\"\" width=\"995\" height=\"250\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_18.jpg 995w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_18-300x75.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_18-768x193.jpg 768w\" sizes=\"(max-width: 995px) 100vw, 995px\" \/><\/p>\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u684c\u9762\u7684\u53cd\u5c04\u6548\u679c\u548c\u89c6\u7ebf\u4e0e\u684c\u9762\u7684\u5939\u89d2\u6709\u5173\uff0c\u89c6\u7ebf\u8d8a\u5e73\u884c\u684c\u9762\uff0c\u684c\u9762\u7684\u53cd\u5c04\u6548\u679c\u8d8a\u5f3a\uff0c\u4e66\u7684\u5012\u5f71\u8d8a\u6e05\u6670\uff1b\u89c6\u7ebf\u8d8a\u5782\u76f4\u684c\u9762\uff0c\u684c\u9762\u7684\u53cd\u5c04\u6548\u679c\u8d8a\u5f31\uff0c\u4e66\u7684\u5012\u5f71\u8d8a\u6a21\u7cca\u3002<\/p>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u7269\u4f53\u7684\u53cd\u5c04\u7387\u5176\u5b9e\u4e0e\u89c2\u5bdf\u89d2\u5ea6\u6709\u5173\uff0c\u5bf9\u4e8e\u7edd\u7f18\u4f53\u6765\u8bf4\u89c2\u5bdf\u89d2\u5ea6\u4e0e\u6cd5\u7ebf\u5939\u89d2\u8d8a\u5927\uff0c\u53cd\u5c04\u7684\u7a0b\u5ea6\u5c31\u8d8a\u9ad8\uff0c\u5982\u4e0b\u56fe\u4e2d\u7684\u7ea2\u7ebf\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4957 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_19.jpg\" alt=\"\" width=\"798\" height=\"638\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_19.jpg 798w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_19-300x240.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_19-768x614.jpg 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p>\n<p>\u800c\u5bfc\u4f53\u5219\u4e0e\u7edd\u7f18\u4f53\u4e0d\u540c\uff0c\u4ed6\u7684\u53cd\u5c04\u7387\u4e0e\u5939\u89d2\u5448\u5982\u4e0b\u5173\u7cfb:<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4958 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_20.jpg\" alt=\"\" width=\"796\" height=\"629\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_20.jpg 796w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_20-300x237.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_20-768x607.jpg 768w\" sizes=\"(max-width: 796px) 100vw, 796px\" \/><\/p>\n<p>\u91d1\u5c5e\u7684\u83f2\u6d85\u5c14\u53cd\u5c04\u73b0\u8c61\u786e\u5b9e\u4e0d\u660e\u663e\uff0c\u4ece\u54ea\u4e2a\u89c6\u89d2\u89c2\u5bdf\u53cd\u5c04\u6548\u679c\u90fd\u6bd4\u8f83\u6e05\u6670\u3002<\/p>\n<p>\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u7269\u4f53\u7684\u7cbe\u786e\u53cd\u5c04\u7387\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4959 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_21.jpg\" alt=\"\" width=\"960\" height=\"250\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_21.jpg 960w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_21-300x78.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_21-768x200.jpg 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/p>\n<p>\u8fd9\u91cc\u8003\u8651\u4e86\u4e24\u4e2a\u6781\u5316\uff0c\u7136\u540e\u518d\u6c42\u5e73\u5747\uff0c\u516c\u5f0f\u7684\u63a8\u7406\u8fc7\u7a0b\u6682\u65f6\u4e0d\u5fc5\u6df1\u7a76\uff0c\u53ea\u8981\u77e5\u9053\uff0c<b>\u7269\u4f53\u7684\u53cd\u5c04\u7387\u548c\u5165\u5c04\u89d2\u5ea6\u3001\u5165\u5c04\u7a7a\u95f4\u7684\u6298\u5c04\u7387\u3001\u7269\u4f53\u7684\u6298\u5c04\u7387\u6709\u5173<\/b>\u5c31\u53ef\u4ee5\u4e86\uff0c\u901a\u8fc7\u8be5\u516c\u5f0f\u5c31\u80fd\u5f97\u51fa\u6b63\u786e\u7684\u53cd\u5c04\u7387\u3002<\/p>\n<p>\u5bf9\u4e8e\u7cbe\u786e\u7684\u7b97\u6cd5\u6765\u8bf4\uff0c\u8ba1\u7b97\u91cf\u662f\u975e\u5e38\u5927\u7684\uff0c\u56e0\u6b64\u6709\u4eba\u63d0\u51fa\u4e86\u4e2a\u7b80\u5355\u7684\u7b97\u6cd5\uff0c\u5927\u5e45\u964d\u4f4e\u8ba1\u7b97\u91cf\u6765\u5f97\u5230\u6bd4\u8f83\u8fd1\u4f3c\u7684\u6548\u679c\uff0c\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4960 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_22.jpg\" alt=\"\" width=\"502\" height=\"166\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_22.jpg 502w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_22-300x99.jpg 300w\" sizes=\"(max-width: 502px) 100vw, 502px\" \/><\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u5fae\u5e73\u9762\u6750\u8d28\uff08Microfacet Material\uff09<\/h1>\n<p>\u8bf4\u5230\u5fae\u5e73\u9762\u6750\u8d28\u5c31\u4e0d\u5f97\u4e0d\u63d0\u5fae\u5e73\u9762\u7406\u8bba(Microfacets Theory)\uff0c\u5fae\u5e73\u9762\u7406\u8bba\u5c31\u662f\u4ece\u5fae\u89c2\u7684\u89d2\u5ea6\u53bb\u5206\u6790\uff0c\u8ba4\u4e3a\u4efb\u610f\u7269\u4f53\u7684\u8868\u9762\u90fd\u662f\u7531\u8bb8\u8bb8\u591a\u591a\u7684\u66f4\u5c0f\u7684<b>\u955c\u9762<\/b>\u6240\u7ec4\u6210\uff0c\u5e76\u4e14\u6bcf\u4e2a\u5fae\u5c0f\u7684\u5e73\u9762\u90fd\u6709\u81ea\u5df1\u7684\u6cd5\u7ebf\u65b9\u5411\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4966 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_23.png\" alt=\"\" width=\"702\" height=\"127\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_23.png 702w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_23-300x54.png 300w\" sizes=\"(max-width: 702px) 100vw, 702px\" \/><\/p>\n<p>\u5f53\u8fd9\u4e9b\u5fae\u5c0f\u7684\u955c\u9762\u7684\u6cd5\u7ebf\u65b9\u5411\u5206\u5e03\u8f83\u4e3a\u96c6\u4e2d\u4e00\u81f4\uff08\u4ece\u6570\u5b66\u4e0a\u770b\u5b83\u4eec\u7684\u65b9\u5dee\u8f83\u5c0f\uff09\u7684\u65f6\u5019\uff0c\u4ece\u5b8f\u89c2\u89d2\u5ea6\u6765\u770b\uff0c\u7269\u4f53\u7684\u8868\u9762\u4f1a\u663e\u5f97\u6bd4\u8f83\u5149\u6ed1\uff0c\u955c\u9762\u53cd\u5c04\u6bd4\u8f83\u660e\u663e\uff1b\u53cd\u4e4b\uff0c\u5f53\u8fd9\u4e9b\u5fae\u5c0f\u955c\u9762\u7684\u6cd5\u7ebf\u65b9\u5411\u5206\u5e03\u8f83\u4e3a\u6742\u4e71\u7684\u65f6\u5019\uff0c\u7269\u4f53\u7684\u8868\u9762\u5219\u4f1a\u663e\u5f97\u76f8\u5bf9\u7c97\u7cd9\uff0c\u6f2b\u53cd\u5c04\u6bd4\u8f83\u660e\u663e\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4968 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_25.jpg\" alt=\"\" width=\"951\" height=\"587\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_25.jpg 951w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_25-300x185.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_25-768x474.jpg 768w\" sizes=\"(max-width: 951px) 100vw, 951px\" \/><\/p>\n<p>\u800c\u6839\u636e\u5fae\u5e73\u9762\u7406\u8bba\u548cBRDF\uff0c\u4e5f\u5c31\u53ef\u4ee5\u63a8\u5bfc\u51fa\u5fae\u5e73\u9762BRDF\uff08Microfacet BRDF\uff09<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4969 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_26.jpg\" alt=\"\" width=\"909\" height=\"529\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_26.jpg 909w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_26-300x175.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_26-768x447.jpg 768w\" sizes=\"(max-width: 909px) 100vw, 909px\" \/><\/p>\n<p>\u5fae\u5e73\u9762BRDF\u9996\u5148\u8003\u8651\u83f2\u6d85\u5c14\u53cd\u5c04<strong>F(i, h)<\/strong>\uff0c\u7136\u540e\u8003\u8651\u6cd5\u7ebf\u5206\u5e03<strong>D(h)<\/strong>\uff0c\u8fd9\u91cc\u53c8\u7528\u5230\u4e86\u534a\u7a0b\u5411\u91cf<strong>h<\/strong>\uff08\u5165\u5c04\u65b9\u5411\u4e0e\u89c2\u5bdf\u65b9\u5411\u7684\u4e2d\u95f4\u5411\u91cfhDir\uff09\uff0c\u53ea\u6709\u5f53\u5fae\u8868\u9762\u7684\u6cd5\u7ebf\u65b9\u5411\u5728\u534a\u7a0b\u5411\u91cf\u5468\u56f4\u4e00\u4e2a\u9650\u5b9a\u7684\u8303\u56f4\u4e4b\u5185\u65f6\uff0c\u624d\u80fd\u5c06\u5149\u53cd\u5c04\u51fa\u53bb\u3002<\/p>\n<p>\u4e2d\u95f4\u90a3\u4e00\u9879<strong>G(i, o, h)<\/strong>\u662f\u8003\u8651\u5fae\u8868\u9762\u4e4b\u95f4\u7684\u5149\u7ebf\u906e\u6321\uff0c\u6bd4\u5982\u5f53\u5149\u7ebf\u63a5\u8fd1\u5e73\u884c\u5e73\u9762\u7684\u65f6\u5019\uff0c\u5165\u5c04\u5149\u7ebf\u53ef\u80fd\u65e0\u6cd5\u7167\u5c04\u5230\u4e00\u4e9b\u5fae\u5e73\u9762\uff0c\u8fd9\u79cd\u60c5\u51b5\u79f0\u4e3aShadowing\uff08\u5982\u4e0b\u56fe\u5de6\uff09\uff0c\u6216\u8005\u53cd\u5c04\u5149\u7ebf\u65e0\u6cd5\u6b63\u5e38\u5230\u8fbe\u4eba\u773c\uff0c\u79f0\u4e3aMasking\uff08\u5982\u4e0b\u56fe\u53f3\uff09\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4970 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_27.png\" alt=\"\" width=\"847\" height=\"284\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_27.png 847w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_27-300x101.png 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_27-768x258.png 768w\" sizes=\"(max-width: 847px) 100vw, 847px\" \/><\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u5404\u5411\u540c\u6027\/\u5404\u5411\u5f02\u6027\u6750\u8d28\uff08Isotropic \/ Anisotropic Materials\uff09<\/h1>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4978 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_32.jpg\" alt=\"\" width=\"945\" height=\"493\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_32.jpg 945w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_32-300x157.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_32-768x401.jpg 768w\" sizes=\"(max-width: 945px) 100vw, 945px\" \/><\/p>\n<p>\u4e00\u4e9b\u91d1\u5c5e\u8868\u9762\uff0c\u5f80\u5f80\u4f1a\u8fdb\u884c\u4e00\u4e9b\u78e8\u7802\u5904\u7406\uff0c\u5728\u8868\u9762\u5f62\u6210\u6cbf\u4e00\u5b9a\u65b9\u5411\u7684\u5212\u75d5\uff0c\u4e5f\u5c31\u662f\u5fae\u8868\u9762\u5b58\u5728\u660e\u786e\u7684\u65b9\u5411\u6027\uff0c\u4ece\u800c\u5f71\u54cd\u53cd\u5c04\u7684\u6548\u679c\uff0c\u8fd9\u6837\u7684\u6750\u8d28\u5c31\u79f0\u5176\u4e3a\u5404\u5411\u5f02\u6027\u6750\u8d28\uff08Anisotropic Materials\uff09\uff1b\u53cd\u4e4b\u5fae\u8868\u9762\u4e0d\u5b58\u5728\u65b9\u5411\u6027\u6216\u8005\u65b9\u5411\u6027\u5f88\u5fae\u5f31\u7684\u6750\u8d28\u5c31\u79f0\u4e3a\u5404\u5411\u540c\u6027\u6750\u8d28\uff08Isotropic Materials\uff09\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4973 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_28.jpg\" alt=\"\" width=\"788\" height=\"567\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_28.jpg 788w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_28-300x216.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_28-768x553.jpg 768w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/p>\n<p>\u5404\u5411\u5f02\u6027\u53cd\u5e94\u5728BRDF\u4e0a\u5c31\u662f\uff1a<\/p>\n<p>BRDF\u539f\u6765\u662f\u4e24\u4e2a\u65b9\u5411\u7684\u51fd\u6570\u03b8<sub>i<\/sub>\u3001\u03c6<sub>i<\/sub>\u662f\u8f93\u5165\u65b9\u5411\uff0c\u03b8<sub>r<\/sub>\u3001\u03c6<sub>r<\/sub>\u662f\u8f93\u51fa\u65b9\u5411\u3002\u5982\u679cBRDF\u6ee1\u8db3\u5728\u65b9\u4f4d\u89d2\u4e0a\u65cb\u8f6c\uff0c\u5f97\u5230\u7684\u8fd8\u662f\u76f8\u540c\u7684BRDF\uff08\u6cbf\u4e00\u4e2a\u65b9\u4f4d\u89d2\u03b8\u6216\u03c6\u7684\u4e2d\u5fc3\u65cb\u8f6c\uff0c\u76f8\u5bf9\u4f4d\u7f6e\u4e0d\u53d8\uff09\uff0c\u5c31\u79f0\u4e3a\u5404\u5411\u540c\u6027\uff1b\u5982\u679c\u76f8\u5bf9\u4f4d\u7f6e\u6539\u53d8\uff0cBRDF\u6539\u53d8\uff0c\u5219\u79f0\u4e3a\u5404\u5411\u5f02\u6027\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4988 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_38.jpg\" alt=\"\" width=\"980\" height=\"527\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_38.jpg 980w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_38-300x161.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_38-768x413.jpg 768w\" sizes=\"(max-width: 980px) 100vw, 980px\" \/><\/p>\n<p>\u5bf9\u4e8e\u5404\u5411\u540c\u6027\u6750\u8d28\uff0cBRDF\u53ea\u548c\u76f8\u5bf9\u7684\u65b9\u4f4d\u89d2\u6709\u5173\uff0c\u5373<strong>\u03c6r-\u03c6i<\/strong>\uff0c\u56e0\u6b64\u539f\u6765\u56db\u7ef4\u7684BRDF\uff0c\u5c31\u53ef\u4ee5\u5199\u6210\u4e09\u7ef4\u7684\u3002<\/p>\n<p>\u6240\u6709\u7684BRDF\uff0c\u7531\u4e8e\u5177\u6709\u53ef\u9006\u6027\uff08\u4ea4\u6362\u5165\u5c04\u65b9\u5411\u548c\u51fa\u5c04\u65b9\u5411\uff0c\u5f97\u5230\u7684BRDF\u7684\u503c\u76f8\u540c\uff09\uff0c\u56e0\u6b64\u76f8\u5bf9\u65b9\u4f4d\u89d2\u4e0d\u7528\u8003\u8651\u6b63\u8d1f\uff0c\u56e0\u6b64\u4e5f\u53ef\u4ee5\u5199\u6210\u65b9\u4f4d\u89d2\u4e4b\u5dee\u7684\u7edd\u5bf9\u503c\uff0c\u4e0d\u7528\u8003\u8651\u5927\u5c0f\u6216\u8005\u6b63\u8d1f\u5173\u7cfb\u3002<\/p>\n<p>\u5176\u4ed6\u7684\u5404\u5411\u5f02\u6027\u6750\u8d28\u8fd8\u6709\u5c3c\u9f99\u3001\u5929\u9e45\u7ed2\u7b49\u7c7b\u578b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-4975\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_30.jpg\" alt=\"\" width=\"1108\" height=\"728\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_30.jpg 1108w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_30-300x197.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_30-1024x673.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_30-768x505.jpg 768w\" sizes=\"(max-width: 1108px) 100vw, 1108px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-4976 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_31.jpg\" alt=\"\" width=\"1111\" height=\"753\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_31.jpg 1111w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_31-300x203.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_31-1024x694.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2022\/03\/MaterialAppearance_31-768x521.jpg 768w\" sizes=\"(max-width: 1111px) 100vw, 1111px\" \/><\/p>\n<p>\u00a0<\/p>\n<p>\u672c\u6587\u53c2\u8003\u81ea\u95eb\u4ee4\u742a\u8001\u5e08\u7684\u300a<a href=\"https:\/\/www.bilibili.com\/video\/BV1X7411F744?p=17\"><span class=\"tit\">GAMES101-\u73b0\u4ee3\u8ba1\u7b97\u673a\u56fe\u5f62\u5b66\u5165\u95e8<\/span><\/a>\u300b\u548c\u5b59\u6653\u78ca\u7684<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/144403802\">\u8ba1\u7b97\u673a\u56fe\u5f62\u5b66\u7cfb\u5217\u7b14\u8bb0<\/a>\uff0c\u611f\u8c22\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u6240\u6709\u7684\u6218\u4e89\u5ba3\u4f20\uff0c<br \/>\u6240\u6709\u7684\u53eb\u56a3\u3001\u8c0e\u8a00\u548c\u4ec7\u6068\uff0c<br \/>\u90fd\u6765\u81ea\u90a3\u4e9b\u4e0d\u4e0a\u6218\u573a\u7684\u4eba\u3002<\/p>\n<p style=\"text-align: right;\">\u2014\u2014\u4e54\u6cbb\u00b7\u5965\u5a01\u5c14<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u60f3\u8981\u5f97\u5230\u4e00\u4e2a\u6f02\u4eae\u51c6\u786e\u7684\u573a\u666f\u6e32\u67d3\u6548\u679c\uff0c\u4e0d\u53ea\u9700\u8981\u7269\u7406\u6b63\u786e\u7684\u5168\u5c40\u7167\u660e\u7b97\u6cd5\uff0c\u4e5f\u8981\u4e86\u89e3\u73b0\u5b9e\u4e2d\u5404\u79cd\u7269\u4f53\u7684\u8868\u9762\u5916\u89c2\u548c\u5728 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4910,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,84],"tags":[86,14,83],"_links":{"self":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts\/4790"}],"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=4790"}],"version-history":[{"count":0,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts\/4790\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/media\/4910"}],"wp:attachment":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}