{"id":1861,"date":"2022-11-22T18:43:32","date_gmt":"2022-11-22T10:43:32","guid":{"rendered":"https:\/\/courtship.top\/?p=1861"},"modified":"2022-11-22T18:43:32","modified_gmt":"2022-11-22T10:43:32","slug":"%e5%89%8d%e5%90%91%e6%b8%b2%e6%9f%93%e4%b8%8e%e5%bb%b6%e8%bf%9f%e6%b8%b2%e6%9f%93","status":"publish","type":"post","link":"https:\/\/courtship.top\/index.php\/2022\/11\/22\/%e5%89%8d%e5%90%91%e6%b8%b2%e6%9f%93%e4%b8%8e%e5%bb%b6%e8%bf%9f%e6%b8%b2%e6%9f%93\/","title":{"rendered":"\u524d\u5411\u6e32\u67d3\u4e0e\u5ef6\u8fdf\u6e32\u67d3"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4e3b\u8981\u53c2\u8003\uff1a\u300aReal-Time Rendering 3rd\u300b \u63d0\u70bc\u603b\u7ed3\u2014\u2014\u6bdb\u661f\u4e91<\/p>\n\n\n\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/485444989\" target=\"_blank\"  rel=\"nofollow\" >\u539f\u6587<\/a><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u524d\u5411\u6e32\u67d3<\/h2>\n\n\n\n<p>\u6bcf\u8fdb\u884c\u4e00\u6b21\u524d\u5411\u6e32\u67d3\uff0c\u4f1a\u6e32\u67d3\u8be5\u5bf9\u8c61\u7684\u56fe\u5143 \uff0c\u5e76\u8ba1\u7b97\u989c\u8272\u3001\u6df1\u5ea6\u7f13\u51b2\u7684\u503c \u6df1\u5ea6\u7f13\u51b2\u5c06\u51b3\u5b9a\u4e00\u4e2a\u7247\u5143\u662f\u5426\u53ef\u89c1 \u5982\u679c\u53ef\u89c1 \u5c06\u989c\u8272\u7f13\u51b2\u4e2d\u7684\u503c\u66f4\u65b0\u3002 \u524d\u5411\u6e32\u67d3\u662f\u5728fragement shader\u4e4b\u540e\u505a\u6df1\u5ea6\u6d4b\u8bd5\u6240\u4ee5\uff0c\u6240\u6709\u7269\u4f53\u5c31\u7b97\u88ab\u906e\u6321\u4e5f\u8981\u8d70\u4e00\u904dfs\uff0c\u5982\u679c\u591a\u5149\u6e90\u5c31\u8981\u8d70\u5149\u6e90\uff0c\u6240\u6709\u7269\u4f53\u50cf\u7d20\u6b21fs(\u4e5f\u53ef\u4ee5\u901a\u8fc7 early depth test\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff09\u3002<\/p>\n\n\n\n<p> \u4e3e\u4e2a\u4f8b\u5b50\uff1a\u573a\u666f\u6709X\u4e2a\u7269\u4f53 \u6bcf\u4e2a\u7269\u4f53\u53c8\u88abY\u4e2a\u5149\u5f71\u54cd \u90a3\u6e32\u67d3\u6574\u4e2a\u573a\u666f\u9700\u8981\u591a\u5c11\u4e2aPass\u5462\uff1f \u7b54\u6848\u662fXY\u4e2a\u3002 \u5982\u679c\u6709\u5f88\u591a\u4e2a\u7269\u4f53\u624e\u5806 \u8fd9\u6027\u80fd\u6d88\u8017\u662f\u975e\u5e38\u5de8\u5927\u7684\u3002 <\/p>\n\n\n\n<p>\u4e0d\u8fc7 unity\u4e5f\u5bf9\u8fd9\u79cd\u60c5\u51b5\u8fdb\u884c\u4e86\u9650\u5236 \u90a3\u5148\u8bf4\u4e0b\u524d\u5411\u6e32\u67d3\u4e2d\u7684\u7167\u660e\u65b9\u5f0f\u5427 \u5206\u522b\u662f \uff1a\u9010\u9876\u70b9\u3001\u9010\u50cf\u7d20\u548c\u7403\u8c10\u51fd\u6570\uff08SH\uff09\u3002\u800c\u5728unity\u4e2d \u9010\u50cf\u7d20\u82e5\u5e72\uff1a\u5e73\u884c\u5149\u4e3a\u9010\u50cf\u7d20 \u5176\u4ed6\u9010\u50cf\u7d20\u53ef\u901a\u8fc7\u5f00\u53d1\u8005\u901a\u8fc7\u4fee\u6539\u6e32\u67d3\u6a21\u5f0f\uff08import\uff09\u8fdb\u884c\u63a7\u5236 \u9010\u9876\u70b9*4 \u5176\u4f59\u7528SH\u65b9\u5f0f\u5904\u7406\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/courtship.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-17.png\" alt=\"\" class=\"wp-image-1863\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>\u524d\u5411\u6e32\u67d3\u7684\u4f18\u7f3a\u70b9<\/strong><\/h3>\n\n\n\n<p><strong>\u4f18\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u652f\u6301\u534a\u900f\u660e<\/li>\n\n\n\n<li>\u652f\u6301\u591aPass<\/li>\n\n\n\n<li>\u652f\u6301\u81ea\u5b9a\u4e49\u7ba1\u7ebf<\/li>\n<\/ul>\n\n\n\n<p><strong>\u7f3a\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5149\u7167\u6570\u91cf\u591a\u8d77\u6765\uff0c\u8ba1\u7b97\u590d\u6742\u5ea6\u5de8\u5927<\/li>\n\n\n\n<li>\u8bbf\u95ee\u6df1\u5ea6\u7b49\u6570\u636e\u9700\u8981\u989d\u5916\u8ba1\u7b97<\/li>\n<\/ul>\n\n\n\n<h3 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:<\/h4>\n\n\n\n<p>\u4f20\u7edf\u7684\u6e32\u67d3\u7ba1\u7ebf\u4e2d\u6df1\u5ea6\u6d4b\u8bd5\u662f\u5728\u8ba1\u7b97\u5b8c\u5149\u7167\u4e4b\u540e\u624d\u8fdb\u884c\u7684\uff0c\u4f46\u662f\u8ba1\u7b97\u5b8c\u5149\u7167\u518d\u8fdb\u884c\u6df1\u5ea6\u5254\u9664\uff0c\u88ab\u6321\u5230\u7684\u90e8\u5206\u5c31\u767d\u8ba1\u7b97\u4e86\u3002\u5728\u5149\u6805\u5316\u9636\u6bb5\uff0c\u6bcf\u4e2a\u6a21\u578b\u7684\u6df1\u5ea6\u5c31\u5df2\u7ecf\u5199\u5165\u6df1\u5ea6\u7f13\u5b58\u4e86\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u5148\u8fdb\u884c\u6df1\u5ea6\u5254\u9664\u518d\u8ba1\u7b97\u5149\u7167\u5462\uff1f\u8fd9\u5c31\u662fEarly-z\u529f\u80fd\uff0c\u8fd9\u4e5f\u662f\u73b0\u5728\u6240\u6709\u786c\u4ef6\u548c\u6e32\u67d3\u7ba1\u7ebf\u90fd\u6709\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Z-Prepass <\/h4>\n\n\n\n<p>\u4e0a\u9762\u8bf4\u7684Early-Z\u4f18\u5316\u867d\u7136\u662f\u5728\u6bcf\u4e2a\u6a21\u578b\u8ba1\u7b97\u5149\u7167\u4e4b\u524d\u5c31\u8fdb\u884c\u4e86\u6df1\u5ea6\u5254\u9664\uff0c\u4f46\u662f\u8fd8\u662f\u4e0d\u80fd\u5b8c\u5168\u907f\u514d\u65e0\u6548\u5149\u7167\u8ba1\u7b97\u7684\u95ee\u9898\u3002\u6bd4\u5982\u7b2c\u4e00\u4e2a\u6a21\u578b\u6e32\u67d3\u7684\u65f6\u5019\uff0c\u6df1\u5ea6\u901a\u9053\u662f\u6ca1\u6709\u4fe1\u606f\u7684\uff0c\u8fd9\u65f6\u54ea\u6015\u8fd9\u4e2a\u6a21\u578b\u4f1a\u88ab\u540e\u6765\u6e32\u67d3\u7684\u6a21\u578b\u5b8c\u5168\u906e\u6321\uff0c\u5b83\u4e5f\u4f1a\u8ba1\u7b97\u5149\u7167\u3002Z-Prepass\u5c31\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9996\u5148\u628a\u6574\u4e2a\u573a\u666f\u4e2d\u7684\u6a21\u578b\u90fd\u6e32\u67d3\u4e00\u904d\uff0c\u5168\u90e8\u90fd\u5199\u5165Z-Buffer 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<\/h4>\n\n\n\n<p>\u4e0a\u9762\u4e24\u79cd\u65b9\u6cd5\u90fd\u662f\u5728GPU\u6bb5\u8fdb\u884c\u7684\uff0c\u800cHi-Z\u8fd9\u79cd\u65b9\u6cd5\u662f\u5728CPU\u7aef\u8fdb\u884c\u7684\uff0c\u5728\u51e0\u4f55\u4f53\u88ab\u63d0\u4ea4\u5230GPU\u4e4b\u524d\u4f1a\u8fdb\u884c\u906e\u6321\u6d4b\u8bd5\uff0c\u5982\u679c\u51e0\u4f55\u4f53\u88ab\u522b\u7684\u7269\u4f53\u906e\u6321\u4e86\u5c31\u4e0d\u4f1a\u63d0\u4ea4\u5230GPU \u3002\u8fd9\u79cd\u65b9\u6cd5\u76f4\u63a5\u51cf\u5c11\u4e86GPU\u9700\u8981\u6e32\u67d3\u7684\u51e0\u4f55\u4f53\u6570\u91cf\uff0c\u9002\u7528\u4e8e\u7ec6\u788e\u4e14\u6570\u91cf\u591a\u7684\u6a21\u578b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5ef6\u8fdf\u6e32\u67d3<\/h2>\n\n\n\n<p>\u524d\u5411\u6e32\u67d3\u4e5f\u8bf4\u5230\u4e86 X*Y\u5728\u9762\u5bf9\u5904\u7406\u5927\u91cf\u5b9e\u65f6\u5149\u6e90\u662f\u5bf9\u6027\u80fd\u6d88\u8017\u975e\u5e38\u6050\u6016\u7684 \u4e8e\u662f\u5ef6\u8fdf\u6e32\u67d3\u5c31\u51fa\u73b0\u4e86 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