{"id":2890,"date":"2021-04-25T22:41:00","date_gmt":"2021-04-25T14:41:00","guid":{"rendered":"https:\/\/www.yumefx.com\/?p=2890"},"modified":"2022-08-09T17:38:08","modified_gmt":"2022-08-09T09:38:08","slug":"%e7%bb%8f%e5%85%b8%e5%85%89%e7%85%a7%e6%a8%a1%e5%9e%8b%e4%b9%8blambert","status":"publish","type":"post","link":"https:\/\/www.yumefx.com\/?p=2890","title":{"rendered":"\u5149\u7167\u6a21\u578b\u57fa\u7840\u4e4bLambert"},"content":{"rendered":"\n<h1 style=\"text-align: center;\">\u524d\u8a00<\/h1>\n<p>\u8bf4\u8d77\u6e32\u67d3\u9886\u57df\u7684\u5149\u7167\u6a21\u578b\uff0c\u6700\u7ecf\u5178\u7684\u5f53\u5c5eLambert\u3001Blin\u3001Phong\uff0c\u8fd9\u51e0\u4e2a\u6a21\u578b\u5c5e\u4e8e\u7ecf\u9a8c\u6a21\u578b\uff0c\u7269\u7406\u4e0d\u591f\u51c6\u786e\uff0c\u6548\u679c\u6bd4\u8f83\u7b80\u964b\uff0c\u5728\u65e9\u671f\u7684\u4e09\u7ef4\u8f6f\u4ef6\u4e2d\u6bd4\u8f83\u5e38\u7528\uff0c\u867d\u7136\u5982\u4eca\u7684\u4e09\u7ef4\u8f6f\u4ef6\u4e2d\u4f9d\u7136\u5b58\u5728\uff0c\u4f46\u5df2\u7ecf\u8f83\u5c11\u4f7f\u7528\u4e86\u3002<\/p>\n<p>\u5373\u4f7f\u5982\u6b64\uff0c\u4e86\u89e3\u8fd9\u4e9b\u7ecf\u5178\u5149\u7167\u6a21\u578b\u7684\u6280\u672f\u539f\u7406\u4f9d\u7136\u662f\u5fc5\u8981\u7684\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u539f\u7406\u5728\u5982\u4eca\u5148\u8fdb\u7684\u57fa\u4e8e\u7269\u7406\u7684\u5149\u7167\u6a21\u578b\uff08PBR\uff09\u4e2d\u4e5f\u4f1a\u7528\u5230\u3002<\/p>\n<p>\u56e0\u6b64\u63a5\u4e0b\u6765\u4f1a\u7528\u51e0\u7bc7\u6587\u7ae0\u6574\u7406\u4e00\u4e0b\u8fd9\u51e0\u4e2a\u7ecf\u5178\u5149\u7167\u6a21\u578b\u7684\u6280\u672f\u539f\u7406\u4ee5\u53ca\u5728UE4\u548cU3D\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u57fa\u7840\u6982\u5ff5<\/h1>\n<h3>DotProduct\uff08\u70b9\u79ef\u3001\u70b9\u4e58\u3001Dot\uff09<\/h3>\n<p>\u6240\u8c13\u70b9\u79ef\uff0c\u662f\u4e24\u5411\u91cf\u4e4b\u95f4\u7684\u4e00\u79cd\u8fd0\u7b97\u65b9\u5f0f\uff0c\u7ed3\u679c\u4e3a\u4e00\u4e2a-1\u52301\u4e4b\u95f4\u7684\u6807\u91cf\uff0c\u5b83\u7684\u51e0\u4f55\u610f\u4e49\u4e3aAB\u5939\u89d2\u7684cos\u4f59\u5f26\u503c\uff0c\u6216\u8005\u8bf4\u662fA\u5411\u91cf\u5728B\u5411\u91cf\u4e0a\u7684\u6295\u5f71\u7684\u76f8\u5bf9\u957f\u5ea6\uff08\u5373\u6295\u5f71\u957f\u5ea6 \/ B\u5411\u91cf\u957f\u5ea6\uff0c\u4e5f\u5c31\u662f\u6807\u51c6\u5316\uff09\uff0c\u4e24\u5411\u91cf\u65b9\u5411\u76f8\u540c\u65f6\u70b9\u79ef\u4e3a1\uff0c\u65b9\u5411\u76f8\u53cd\u65f6\u70b9\u79ef\u4e3a-1\uff0c\u65b9\u5411\u5782\u76f4\u65f6\u70b9\u79ef\u4e3a0\uff08\u5373cos0=1\uff0ccos90=0\uff0ccos180=-1\uff09\u3002<\/p>\n<p>\u70b9\u79ef\u7684\u4e00\u5927\u6027\u8d28\u4e3a\u4ea4\u6362\u6027\uff0c\u4e5f\u5c31\u662f<strong>Dot(A, B) = Dot(B, A)<\/strong>\u3002<\/p>\n<h3>\u00a0<\/h3>\n<h3>\u5e38\u7528\u5411\u91cf<\/h3>\n<ul>\n<li>nDir\uff1a\u6cd5\u7ebf\u65b9\u5411<\/li>\n<li>lDir\uff1a\u5149\u7167\u65b9\u5411\uff0c\u5b9e\u9645\u4e3a\u5165\u5c04\u5149\u7ebf\u7684\u9006\u5411\u5411\u91cf<\/li>\n<li>vDir\uff1a\u6444\u50cf\u673a\u89c2\u5bdf\u65b9\u5411<\/li>\n<li>rDir\uff1a\u5149\u53cd\u5c04\u65b9\u5411<\/li>\n<li>hDir\uff1a\u534a\u89d2\u65b9\u5411\uff0clDIr\u4e0evDir\u7684\u4e2d\u95f4\u89d2\u65b9\u5411<\/li>\n<\/ul>\n<h3>\u00a0<\/h3>\n<h3>\u6240\u5728\u7a7a\u95f4<\/h3>\n<ul>\n<li>OS\uff1aObjectSpace\u00a0\u7269\u4f53\u7a7a\u95f4<\/li>\n<li>WS\uff1aWorldSpace\u00a0\u4e16\u754c\u7a7a\u95f4<\/li>\n<li>VS\uff1aViewSpace\u00a0\u89c2\u5bdf\u7a7a\u95f4<\/li>\n<li>CS\uff1aHomogenousClipSpace\u00a0\u9f50\u6b21\u88c1\u526a\u7a7a\u95f4<\/li>\n<li>TS\uff1aTangentSpace\u00a0\u5207\u7ebf\u7a7a\u95f4<\/li>\n<li>TXS\uff1aTextureSpace\u00a0\u7eb9\u7406\u7a7a\u95f4<\/li>\n<\/ul>\n<p>\u5e38\u7528\u5411\u91cf\u548c\u6240\u5728\u7a7a\u95f4\u642d\u914d\u4f7f\u7528\uff0c\u4f8b\u5982nDirWS\u4e3a\u4e16\u754c\u7a7a\u95f4\u4e0b\u7684\u6cd5\u7ebf\u65b9\u5411\u3002<\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u7b80\u6613Lambert\u5149\u7167\u6a21\u578b<\/h1>\n<p>\u6240\u8c13Lambert\u5149\u7167\u6a21\u578b\u5373\u7eaf\u6f2b\u53cd\u5c04\u6a21\u578b\uff0c\u5149\u7ebf\u7167\u5c04\u5230\u7269\u4f53\u4e0a\u65f6\uff0c\u6f2b\u53cd\u5c04\u5149\u5f3a\u5ea6\u4e0e\u5165\u5c04\u5149\u89d2\u5ea6\u548c\u5165\u5c04\u70b9\u8868\u9762\u6cd5\u7ebf\u5939\u89d2\u6210\u53cd\u6bd4\uff0c\u5373\u5939\u89d2\u8d8a\u5c0f\u8868\u9762\u8d8a\u4eae\u3002<\/p>\n<p>\u8ba1\u7b97\u65b9\u5f0f\u5c31\u662f\u6839\u636e<strong>\u6a21\u578b\u8868\u9762\u7684\u6cd5\u7ebf\u5411\u91cf\uff08nDir\uff09<\/strong>\u4e0e<strong>\u5149\u7ebf\u7684\u76f8\u53cd\u5411\u91cf\uff08lDir\uff09<\/strong>\u505a<strong>\u70b9\u79ef<\/strong>\uff0c\u5373<strong>dot(nDir, lDir)<\/strong>\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u5373\u4e3a\u8f93\u51fa\u7684\u50cf\u7d20\u4eae\u5ea6\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2891 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_01.jpg\" alt=\"\" width=\"584\" height=\"585\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_01.jpg 584w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_01-300x300.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_01-150x150.jpg 150w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/p>\n<p>\u5f97\u5230\u7684\u7ed3\u679c\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u6b63\u9762\u6cd5\u7ebf\u4e0e\u5149\u7ebf\u5e73\u884c\u5904\u70b9\u79ef\u4e3a1\uff0c\u7eaf\u767d\u8272\uff1b\u660e\u6697\u4ea4\u754c\u7ebf\u5904\u6cd5\u7ebf\u4e0e\u5149\u7ebf\u5782\u76f4\u70b9\u79ef\u4e3a0\uff0c\u7eaf\u9ed1\uff1b\u4e24\u8005\u4e4b\u95f4\u70b9\u79ef\u4e3a0\u52301\u4e4b\u95f4\uff0c\u4e3a\u7070\u8272\uff1b\u80cc\u9762\u6cd5\u7ebf\u4e0e\u5149\u7ebf\u70b9\u79ef\u5c0f\u4e8e0\uff0c\u4e5f\u4e3a\u7eaf\u9ed1\u3002<\/p>\n<p>\u7531\u4e8e\u70b9\u79ef\u4e3a0\u548c\u5c0f\u4e8e0\u90fd\u4e3a\u7eaf\u9ed1\uff0c\u56e0\u6b64\u901a\u5e38\u5c06\u5c0f\u4e8e0\u7684\u503c\u6539\u4e3a0\uff0c\u5373<strong>Max(0, dot(nDir, lDir))<\/strong>\uff0c\u518d\u5c06\u5f97\u5230\u7684\u4eae\u5ea6\u901a\u8fc7<strong>Multiply\u8282\u70b9<\/strong>\u4e58\u4e0a\u5149\u7167\u989c\u8272\u3001\u5149\u7167\u5f3a\u5ea6\u4ee5\u53cashader\u56fa\u6709\u8272\uff0c\u6700\u7ec8\u8ba1\u7b97\u51fa\u7684\u5c31\u662f\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\u7684\u989c\u8272\uff0c\u8fd9\u5c31\u662f\u7b80\u6613\u7684Lambert\u5149\u7167\u6a21\u578b\u3002<\/p>\n<h3>\u00a0<\/h3>\n<h1 style=\"text-align: center;\">\u5728U3D\u4e2d\u6a21\u62dfLambert<\/h1>\n<p>\u5728U3D\u4e2d\u53ef\u4ee5\u4f7f\u7528<a href=\"https:\/\/github.com\/FreyaHolmer\/ShaderForge\">ShaderForge<\/a>\u5b9e\u73b0\uff0c\u5176\u4e2d\u6cd5\u7ebf\u5411\u91cf\u53ef\u4ee5\u4f7f\u7528<strong>Normal Dir<\/strong>\u8282\u70b9\uff0c\u5149\u7ebf\u76f8\u53cd\u5411\u91cf\u53ef\u4ee5\u4f7f\u7528<strong>Light\u00a0Direction<\/strong>\u8282\u70b9\uff0c\u70b9\u79ef\u8fd0\u7b97\u5219\u4e3a<strong>Dot\u00a0Product<\/strong>\u8282\u70b9\uff0c\u518d\u5c06Dot Product\u8282\u70b9\u7684\u8f93\u51fa\u8fde\u63a5<strong>clamp 0-1<\/strong>\u8282\u70b9\uff08\u6216\u8005Saturate\u4ee5\u53caMax\u7b49\u8282\u70b9\u90fd\u53ef\u4ee5\uff09\uff0c\u518d\u4e0e\u706f\u5149\u989c\u8272\u548c\u81ea\u5b9a\u4e49\u7684\u56fa\u6709\u8272\u76f8\u4e58\uff0c\u6700\u540e\u8fde\u5230shader\uff08shader\u7c7b\u578b\u5e94\u4e3a<strong>Unlit<\/strong>\uff09\u7684<strong>Emission\u81ea\u53d1\u5149<\/strong>\u5c5e\u6027\u4e0a\uff0c\u8fde\u63a5\u5b8c\u6210\u540e\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2930 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12.jpg\" alt=\"\" width=\"1655\" height=\"693\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12.jpg 1655w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12-300x126.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12-1024x429.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12-768x322.jpg 768w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_12-1536x643.jpg 1536w\" sizes=\"(max-width: 1655px) 100vw, 1655px\" \/><\/p>\n<h3>\u00a0<\/h3>\n<h1 style=\"text-align: center;\">\u5728UE4\u4e2d\u6a21\u62dfLambert<\/h1>\n<p>\u5728UE4\u4e2d\u53ef\u4ee5\u4f7f\u7528\u81ea\u5e26\u7684\u6750\u8d28\u7f16\u8f91\u5668\u5b9e\u73b0\uff0c\u5176\u4e2d\u6cd5\u7ebf\u5411\u91cf\u53ef\u4ee5\u4f7f\u7528<b>PixelNormalWS<\/b>\u8282\u70b9\uff0c\u5149\u7ebf\u76f8\u53cd\u5411\u91cflDir\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u4e09\u7ef4\u6807\u91cf\uff08<strong>Constant3Vector<\/strong>\uff09\u4ee3\u66ff \uff0c\u70b9\u79ef\u8fd0\u7b97\u5219\u4e3a<strong>DotProduct<\/strong>\u8282\u70b9\uff0c\u518d\u5c06DotProduct\u8282\u70b9\u7684\u8f93\u51fa\u8fde\u63a5\u5230<strong>clamp<\/strong>\u8282\u70b9\uff08\u6216\u8005Saturate\u4ee5\u53caMax\u7b49\u8282\u70b9\u4e5f\u53ef\u4ee5\uff09\uff0c\u4f7f\u7528<strong>Multiply<\/strong>\u8282\u70b9\u4e58\u4e0a\u706f\u5149\u7684\u989c\u8272\u3001\u706f\u5149\u7684\u5f3a\u5ea6\u4ee5\u53cashader\u7684\u56fa\u6709\u8272\uff0c\u6700\u540e\u8fde\u5230shader\u7684<strong>Emissive\u00a0Color\u81ea\u53d1\u5149<\/strong>\u5c5e\u6027\u4e0a\uff08\u6ce8\u610fshader\u7684Material Domain\u6539\u4e3a<strong>Light\u00a0Function<\/strong>\uff09\uff0c\u8fde\u63a5\u5b8c\u6210\u540e\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2929 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11.jpg\" alt=\"\" width=\"1753\" height=\"847\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11.jpg 1753w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11-300x145.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11-1024x495.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11-768x371.jpg 768w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_11-1536x742.jpg 1536w\" sizes=\"(max-width: 1753px) 100vw, 1753px\" \/><\/p>\n<p>\u00a0<\/p>\n<h1 style=\"text-align: center;\">\u534aLambert\u5149\u7167\u6a21\u578b<\/h1>\n<p>\u53ef\u4ee5\u770b\u5230\u4e0a\u9762\u7684\u56fe\u4e2d\u7403\u4f53\u80cc\u9762\u5904\u4e8e\u5b8c\u5168\u7684\u9ed1\u8272\uff0c\u4e0d\u5229\u4e8e\u89c2\u5bdf\uff0c\u56e0\u6b64\u6709\u4e86\u534aLambert\u5149\u7167\u6a21\u578b\u8fd9\u4e00\u53d8\u4f53\uff0c\u539f\u7406\u5c31\u662f\u5c06<strong>-1\u52301\u7684\u4eae\u5ea6\u533a\u57df<\/strong>\u6620\u5c04\u5230<strong>0\u52301\u7684\u4eae\u5ea6\u533a\u57df<\/strong>\uff0c\u8fd9\u6837\u4e00\u6765\u660e\u6697\u4ea4\u754c\u7ebf\u5904\u4e3a\u4eae\u5ea60.5\u7684\u7070\u8272\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2894 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_03.jpg\" alt=\"\" width=\"768\" height=\"680\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_03.jpg 768w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_03-300x266.jpg 300w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\uff0c\u5de6\u4fa7\u4e3a\u534aLambert\uff0c\u53f3\u4fa7\u4e3aLambert\u3002<\/p>\n<p>\u7b80\u6613\u7684\u534aLambert\u5149\u7167\u6a21\u578b\u8ba1\u7b97\u65b9\u5f0f\u4e3a<strong>dot(nDir, lDir) * 0.5 + 0.5<\/strong>\u3002\u8282\u70b9\u8fde\u63a5\u65b9\u9762\u5219\u53bb\u6389<strong>Clamp<\/strong>\u8282\u70b9\uff0c\u5728<strong>Dot\u00a0Product<\/strong>\u8282\u70b9\u540e\u8fde\u63a5<strong>Multiply<\/strong>\u8282\u70b9\u548c<strong>Add<\/strong>\u8282\u70b9\uff08\u6216\u8005\u53ea\u4f7f\u7528Remap\u8282\u70b9\u6620\u5c04\u53d6\u503c\u8303\u56f4\uff09\u3002<\/p>\n<p>\u534aLambert\u5149\u7167\u6a21\u578b\u867d\u7136\u907f\u514d\u4e86\u6697\u90e8\u7684\u7ec6\u8282\u4e22\u5931\uff0c\u4f46\u5728\u7269\u7406\u771f\u5b9e\u4ee5\u53ca\u89c6\u89c9\u65b9\u9762\u504f\u5dee\u66f4\u5927\uff0c\u56e0\u6b64\u4f7f\u7528\u8f83\u5c11\u3002<\/p>\n<h3>\u00a0<\/h3>\n<h1 style=\"text-align: center;\">\u5047SSS\u6548\u679c<\/h1>\n<p>\u57fa\u4e8e\u534aLambert\u7684\u6280\u672f\u539f\u7406\uff0c\u53ef\u4ee5\u4f7f\u7528\u540c\u8272\u8c03\u7684\u5f69\u8272\u6e10\u53d8\u66ff\u6362\u9ed1\u767d\u4eae\u5ea6\uff0c\u4ece\u800c\u5b9e\u73b0\u5047SSS\u7684\u900f\u5149\u6548\u679c\uff0c\u6027\u80fd\u5f00\u9500\u5f88\u5c0f\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2904 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_06.jpg\" alt=\"\" width=\"798\" height=\"680\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_06.jpg 798w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_06-300x256.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_06-768x654.jpg 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p>\n<p>\u539f\u7406\u662f\u901a\u8fc7\u5c06\u70b9\u79ef\u5f97\u5230\u7684\u6807\u91cf\u89c6\u4e3au\u5750\u6807\uff0c\u518d\u4f7f\u7528<strong>Append\u00a0Vector<\/strong>\u8282\u70b9\u9644\u52a0\u5e38\u91cf\u4f5c\u4e3av\u5750\u6807\u5408\u5e76\u6210uv\u4e8c\u7ef4\u5750\u6807\uff0c\u5e76\u4f7f\u7528\u6b64uv\u5750\u6807\u5bf9\u6e10\u53d8\u8d34\u56fe\u8fdb\u884c\u91c7\u6837\uff0c\u5728UE4\u4e2d\u7684\u8282\u70b9\u8fde\u63a5\u5982\u4e0b\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-2907 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_08.jpg\" alt=\"\" width=\"1472\" height=\"535\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_08.jpg 1472w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_08-300x109.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_08-1024x372.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_08-768x279.jpg 768w\" sizes=\"(max-width: 1472px) 100vw, 1472px\" \/><\/p>\n<p>U3D\u540c\u7406\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n<p>\u5982\u679c\u5c06\u6e10\u53d8\u8d34\u56fe\u7684v\u65b9\u5411\u505a\u4e00\u5b9a\u53d8\u5316\u5904\u7406\uff0c\u6b64\u65f6\u5f97\u5230\u7684\u5c31\u4f1a\u662f\u4e8c\u7ef4\u6e10\u53d8\uff0c\u518d\u628a<strong>Append\u00a0Vector<\/strong>\u8282\u70b9\u9644\u52a0\u7684\u5e38\u91cf\u6539\u6210\u53d8\u91cf\uff0c\u5c31\u53ef\u4ee5\u7528\u6765\u5236\u4f5c\u4e00\u4e9b\u8272\u5f69\u53d8\u5316\u6216\u8005\u80a4\u8272\u6548\u679c\uff0c\u4e5f\u5c31\u662f<strong>\u9884\u79ef\u5206shader\uff08Pre-Integrated SkinShader\uff09<\/strong>\u7684\u4e00\u79cd\u5e38\u89c1\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-5437 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/04\/ShaderModel_13.png\" alt=\"\" width=\"877\" height=\"710\" \/><\/p>\n<p>\u4f8b\u5982\u50cf\u4e0a\u56fe\u8fd9\u6837\uff0c\u6839\u636e\u6a21\u578b\u7684\u539a\u5ea6\u6765\u51b3\u5b9av\u65b9\u5411\u7684\u6570\u503c\uff0c\u4ece\u800c\u8ba9\u8584\u7684\u6a21\u578b\u76f8\u6bd4\u539a\u7684\u6a21\u578b\u6709\u66f4\u591a\u7684\u80a4\u8272\u6e10\u53d8\uff0c\u4ece\u800c\u6a21\u62df\u6b21\u8868\u9762\u6563\u5c04\u6548\u679c\u3002<\/p>\n<p>\u800c\u6a21\u578b\u7684\u539a\u5ea6\u4e00\u822c\u662f\u5728DCC\u8f6f\u4ef6\u4e2d\u901a\u8fc7\u70d8\u7119\u751f\u6210\u539a\u5ea6\u8d34\u56fe\uff0c\u5728shader\u8ba1\u7b97\u65f6\u91c7\u6837\u539a\u5ea6\u8d34\u56fe\u5f97\u5230\uff0c\u4e5f\u7b97\u662f\u4e00\u79cd\u7a7a\u95f4\u6362\u65f6\u95f4\u7b97\u6cd5\uff0c\u6548\u679c\u548c\u4ee3\u4ef7\u8fd8\u53ef\u4ee5\u63a5\u53d7\u3002<\/p>\n<p>\u5176\u4ed6\u7528\u5904\u8fd8\u6709\u7528\u6765\u505a\u5361\u901a\u6750\u8d28\u3001\u5047\u9ad8\u5149\u7b49\u7b49\u3002<\/p>\n<h3>\u00a0<\/h3>\n<h1 style=\"text-align: center;\">\u5728U3D\u4e2d\u901a\u8fc7\u4ee3\u7801\u5b9e\u73b0Lambert<\/h1>\n<p>\u9664\u4e86\u901a\u8fc7ShaderForge\u8fde\u7ebf\u4ee5\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u7f16\u5199shader\u4ee3\u7801\u5b9e\u73b0Lambert\u7b97\u6cd5\uff0c\u867d\u7136\u7f16\u5199\u4ee3\u7801\u95e8\u69db\u8f83\u9ad8\u8f83\u4e3a\u590d\u6742\u6613\u9519\uff0c\u4f46\u4f18\u70b9\u662f\u66f4\u52a0\u7075\u6d3b\u548c\u65b9\u4fbf\u6027\u80fd\u4f18\u5316\u3002<\/p>\n<p>\u5728U3D\u4e2d\u5b9e\u73b0\u7b80\u6613Lambert\u7684shader\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre><span>\/\/ shader\u7684\u8def\u5f84\u548c\u540d\u79f0<\/span>\n<span>Shader \"Shader Forge\/test\" {<\/span>\n<span>    \/\/ \u81ea\u5b9a\u4e49Base Color\u5c5e\u6027<\/span>\n<span>    Properties {<\/span>\n<span>        _BaseColor (\"Base Color\", Color) = (0.7, 0.4, 0.4)<\/span>\n<span>    }<\/span>\n<span>    SubShader {<\/span>\n<span>        Tags {<\/span>\n<span>            \"RenderType\"=\"Opaque\"<\/span>\n<span>        }<\/span>\n<span>        Pass {<\/span>\n<span>            Name \"FORWARD\"<\/span>\n<span>            Tags {<\/span>\n<span>                \"LightMode\"=\"ForwardBase\"<\/span>\n<span>            }<\/span>\n<span>            <\/span>\n<span>            CGPROGRAM<\/span>\n<span>            #pragma vertex vert<\/span>\n<span>            #pragma fragment frag<\/span>\n<span>            #include \"UnityCG.cginc\"<\/span>\n<span>            #pragma multi_compile_fwdbase_fullshadows<\/span>\n<span>            #pragma target 3.0<\/span>\n<span><\/span>\n<span>            \/\/ \u58f0\u660e\u53d8\u91cf<\/span>\n<span>            uniform float4 _LightColor0;<\/span>\n<span>            uniform float4 _BaseColor;<\/span>\n<span>            <\/span>\n<span>            \/\/ \u8f93\u5165\u7ed3\u6784<\/span>\n<span>            struct VertexInput {<\/span>\n<span>                \/\/ \u8f93\u5165\u9876\u70b9\u7684\u7269\u4f53\u7a7a\u95f4\u4f4d\u7f6e<\/span>\n<span>                float4 vertex : POSITION;<\/span>\n<span>                \/\/ \u8f93\u5165\u6cd5\u7ebf\u7684\u7269\u4f53\u7a7a\u95f4\u65b9\u5411<\/span>\n<span>                float3 normal : NORMAL;<\/span>\n<span>            };<\/span>\n<span>            <\/span>\n<span>            \/\/ \u8f93\u51fa\u7ed3\u6784<\/span>\n<span>            struct VertexOutput {<\/span>\n<span>                \/\/ \u8f93\u51fa\u9876\u70b9\u7684\u88c1\u526a\u7a7a\u95f4\u4f4d\u7f6e<\/span>\n<span>                float4 posCS : SV_POSITION;<\/span>\n<span>                \/\/ \u8f93\u51fa\u6cd5\u7ebf\u7684\u4e16\u754c\u7a7a\u95f4\u65b9\u5411nDir<\/span>\n<span>                float3 nDirWS : TEXCOORD0;<\/span>\n<span>            };<\/span>\n<span>            <\/span>\n<span>            \/\/ \u9876\u70b9shader<\/span>\n<span>            VertexOutput vert (VertexInput v) {<\/span>\n<span>                VertexOutput o = (VertexOutput)0;<\/span>\n<span>                \/\/ \u8ba1\u7b97\u6cd5\u7ebf\u7684\u4e16\u754c\u7a7a\u95f4\u65b9\u5411<\/span>\n<span>                o.nDirWS = UnityObjectToWorldNormal(v.normal);<\/span>\n<span>                \/\/ \u8ba1\u7b97\u9876\u70b9\u7684\u88c1\u526a\u7a7a\u95f4\u4f4d\u7f6e<\/span>\n<span>                o.posCS = UnityObjectToClipPos( v.vertex );<\/span>\n<span>                return o;<\/span>\n<span>            }<\/span>\n<span>            <\/span>\n<span>            \/\/ \u50cf\u7d20shader<\/span>\n<span>            float4 frag(VertexOutput i) : COLOR {<\/span>\n<span>                \/\/ \u51c6\u5907\u5411\u91cf<\/span>\n<span>                float3 nDirWS = i.nDirWS;<\/span>\n<span>                float3 lDirWS = normalize(_WorldSpaceLightPos0.xyz);<\/span>\n<span><\/span>\n<span>                \/\/ \u8ba1\u7b97\u70b9\u79ef<\/span>\n<span>                float nDotl = dot(nDirWS, lDirWS);<\/span>\n<span><\/span>\n<span>                \/\/ \u5149\u7167\u6a21\u578b<\/span>\n<span>                float Intensity = max(0.0,nDotl);<\/span>\n<span>                \/\/ float Intensity = nDotl * 0.5 + 0.5;    \/\/ \u534aLambert<\/span>\n<span>                float3 FinalRGB = _BaseColor.rgb * Intensity * _LightColor0.rgb;<\/span>\n<span>                return float4(FinalRGB, 1.0);<\/span>\n<span>            }<\/span>\n<span>            ENDCG<\/span>\n<span>        }<\/span>\n<span>    }<\/span>\n<span>    FallBack \"Diffuse\"<\/span>\n<span>}<\/span>\n<\/pre>\n\n\n\n<p>&nbsp;<\/p>\n<p>\u672c\u6587\u53c2\u8003\u81ea<a href=\"https:\/\/space.bilibili.com\/6373917\/video\">B\u7ad9\u5e84\u61c2\u7684\u6280\u672f\u7f8e\u672f\u5165\u95e8\u8bfe<\/a>\uff0c\u611f\u8c22\u3002<\/p>\n<p>&nbsp;<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u575a\u6301\u4f60\u559c\u6b22\u7684\uff0c<br \/>\u5c0a\u91cd\u4f60\u4e0d\u7406\u89e3\u7684\uff0c<br \/>\u662f\u6210\u5e74\u4eba\u793e\u4ea4\u7684\u57fa\u672c\u793c\u4eea\uff1b<br \/>\u5c11\u53bb\u7834\u574f\u522b\u4eba\u7684\u5174\u81f4\u3002<\/p>\n<p style=\"text-align: right;\">\u300a\u4e16\u754c\u5f88\u5927\uff0c\u6709\u4f60\u521a\u597d\u300b<br \/>\u2014\u2014\u9e7f\u6ee1\u5ddd<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u8bf4\u8d77\u6e32\u67d3\u9886\u57df\u7684\u5149\u7167\u6a21\u578b\uff0c\u6700\u7ecf\u5178\u7684\u5f53\u5c5eLambert\u3001Blin\u3001Phong\uff0c\u8fd9\u51e0\u4e2a\u6a21\u578b\u5c5e\u4e8e\u7ecf\u9a8c\u6a21\u578b\uff0c\u7269\u7406\u4e0d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5437,"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\/2890"}],"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=2890"}],"version-history":[{"count":0,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/posts\/2890\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=\/wp\/v2\/media\/5437"}],"wp:attachment":[{"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yumefx.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}