{"id":380,"date":"2026-04-09T15:19:15","date_gmt":"2026-04-09T07:19:15","guid":{"rendered":"http:\/\/chenglixue.top\/?p=380"},"modified":"2026-04-09T15:19:15","modified_gmt":"2026-04-09T07:19:15","slug":"dx12-sobol-shadow","status":"publish","type":"post","link":"http:\/\/chenglixue.top\/?p=380","title":{"rendered":"DX12 Sobol Shadow"},"content":{"rendered":"<p><div class=\"has-toc have-toc\"><\/div><\/p>\n<h1>\u524d\u8a00<\/h1>\n<p>\u4f20\u7edf\u7684PCF\u901a\u5e38\u9700\u8981\u5728\u6bd4\u8f83\u9ad8\u7684\u91c7\u6837\u6b21\u6570\u624d\u80fd\u5f97\u5230\u4e00\u4e2a\u6bd4\u8f83\u597d\u7684\u6548\u679c\uff0c\u4f46\u56e0\u4e3a\u6bcf\u4e2auv\u90fd\u9700\u8981\u6267\u884cPCF\uff0c\u5f00\u9500\u662f\u6bd4\u8f83\u9ad8\u7684<\/p>\n<p>\u5b9e\u65f6\u6e32\u67d3\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u7528\u5f88\u4f4e\u7684\u91c7\u6837\u8fbe\u5230\u4e00\u4e2a\u770b\u8d77\u6765\u4e0d\u9519\u7684\u6548\u679c\uff0c\u4e3a\u4e86\u8fbe\u5230\u8fd9\u4e2a\u6548\u679c\u4e00\u822c\u9700\u8981\u7528\u5230\u968f\u673a+TAA\u591a\u5e27\u878d\u5408\uff0c\u6bd4\u5982HBAO\u5728\u534a\u7403\u4e0a\u968f\u673a\u65b9\u5411\u65f6\uff0c\u5c31\u4f1a\u7528\u5230<\/p>\n<p>\u4f46\u5e76\u4e0d\u662f\u4efb\u4f55\u968f\u673a\u7b97\u6cd5\u90fd\u53ef\u4ee5\uff0c\u597d\u7684\u968f\u673a\u7b97\u6cd5\u4ea7\u751f\u7684\u566a\u70b9\u5341\u5206\u5c11\u4e14\u7ed3\u5408\u4e86\u4eba\u773c\u7279\u6027\u51e0\u4e4e\u5bdf\u89c9\u4e0d\u5230\u8fd9\u4e9b\u566a\u70b9\uff0c\u5dee\u7684\u5c31\u5341\u5206\u591a\u4e14\u7279\u522b\u660e\u663e<\/p>\n<h1>\u4e00\u79cd\u4f4e\u5dee\u5f02\u7684\u968f\u673a\u7b97\u6cd5<\/h1>\n<ul>\n<li>White Noise<br \/>\n<img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d713bc3b088506c488c20c.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d713bc3b088506c488c20c.png\" alt=\"\" \/><\/p><\/noscript>\n<p>\u8fd9\u79cd\u566a\u58f0\u7684\u6548\u679c\u975e\u5e38\u968f\u673a\uff0c\u53ef\u80fd\u4f1a\u624e\u5806\u4e5f\u53ef\u80fd\u79bb\u5f97\u975e\u5e38\u8fdc\uff0c\u5bfc\u81f4\u6e32\u67d3\u6548\u679c\u4e0d\u5747\u5300\uff0c\u975e\u5e38\u4e0d\u9002\u5408\u4e8e\u6e32\u67d3<\/p>\n<\/li>\n<li>\n<p>Poisson Disk<\/p>\n<p><img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d714453b088506c488c3ab.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><br \/ >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d714453b088506c488c3ab.png\" alt=\"\" \/><br \/><\/noscript>\n\u8fd9\u79cd\u566a\u58f0\u4fdd\u8bc1\u6bcf\u4e2a\u70b9\u4e4b\u95f4\u7684\u8ddd\u79bb\u90fd\u5927\u4e8e\u4e00\u4e2a\u7279\u5b9a\u503cr\uff0c\u4ece\u4e0a\u56fe\u4e0d\u96be\u770b\u51fa\uff0c\u751f\u6210\u7684\u70b9\u5341\u5206\u5747\u5300<\/p>\n<p>\u4f46\u8fd9\u79cd\u566a\u58f0\u9700\u8981\u6bd4\u8f83\u9ad8\u7684\u91c7\u6837\u6b21\u6570\uff0c\u6bcf\u6b21\u5faa\u73af\u90fd\u8981\u7528\u5230sin\u3001cos\u8fd9\u79cd\u9ad8\u5f00\u9500\u51fd\u6570\uff0c\u4e14\u7531\u4e8e\u968f\u673a\u751f\u6210\u7684\u65cb\u8f6c\u89d2\u5ea6\u662f\u767d\u566a\u58f0\u7684\u5f62\u5f0f\uff0c\u4e0d\u80fd\u914d\u5408TAA<\/p>\n<\/li>\n<li>\n<p>Sobol\u4f4e\u5dee\u5f02\u5e8f\u5217<\/p>\n<p><img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d719173b088506c488ebe7.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><br \/ >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d719173b088506c488ebe7.png\" alt=\"\" \/><br \/><\/noscript>\n\u8fd9\u79cd\u566a\u58f0\u7b26\u5408\u8499\u7279\u5361\u6d1b\uff0c\u4e0d\u7ba1\u6837\u672c\u591a\u5c11\u4e2a\uff0c\u90fd\u53ef\u4ee5\u5feb\u901f\u3001\u5747\u5300\u7684\u586b\u6ee1\u7a7a\u95f4<\/p>\n<p>\u4e0ePoisson Disk\u76f8\u6bd4\uff0c\u8fd9\u79cd\u566a\u58f0\u6536\u655b\u975e\u5e38\u5feb\uff0c\u4ee5\u6781\u4f4e\u7684\u91c7\u6837\u6570\u8986\u76d6\u91c7\u6837\u533a\u57df\uff0c\u8fd9\u6b63\u662f\u5b9e\u65f6\u6e32\u67d3\u9700\u8981\u7684<\/p>\n<\/li>\n<\/ul>\n<h1>Sobol Shadow<\/h1>\n<p>\u4f46\u76f4\u63a5\u5c06sobol\u7528\u4e8e\u91c7\u6837\uff0c\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684band\uff0c\u8fd9\u91cc\u7b14\u8005\u7528\u5230\u4e86blue noise\u6765\u5b9e\u73b0\u9ad8\u9891\u96ea\u82b1\uff0c\u5e76\u7ed3\u5408TAA\u964d\u566a<\/p>\n<ul>\n<li>\u65f6\u57df\u9ec4\u91d1\u5206\u5272\u7387\u968f\u673a\n<pre><code class=\"line-numbers\">float2 temporalShift = frac(frameIndex * float2(0.61803398875f, 0.75487766624f));\n<\/code><\/pre>\n<\/li>\n<li>\u7a7a\u57df\u84dd\u566a\u58f0\u968f\u673a\n<pre><code class=\"line-numbers\">float2 spatialShift = LoadTexture2D(BlueNoiseTexIndex, pixelCoord % blueNoiseDimension.xy).xy;\n<\/code><\/pre>\n<\/li>\n<li>sobol\u91c7\u6837shadow\n<pre><code class=\"line-numbers\">uint sobolX = g_Sobol_256spp_256d[sampleIdx * 256 + 0];\nuint sobolY = g_Sobol_256spp_256d[sampleIdx * 256 + 1];\nfloat2 baseSobol = float2(sobolX, sobolY) * (1.0f \/ 256.0f);\n\nfloat2 samplePoint = frac(baseSobol + shift);\nfloat2 offset = WarpToDisk(samplePoint);\nfloat2 sampleUV = shadowPos + offset * shadowMapSize.zw * shadowRadius;\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<p>3\u6b21\u91c7\u6837\u53ef\u4ee5\u5f97\u5230\u5982\u4e0b\u6548\u679c\uff1a<br \/>\n<img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d71fcb3b088506c489006d.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><br \/ >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d71fcb3b088506c489006d.png\" alt=\"\" \/><br \/><\/noscript>\n<img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d720073b088506c4890129.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d720073b088506c4890129.png\" alt=\"\" \/><\/p><\/noscript>\n<p>\u4ec5\u4ec5100us\u7684\u8017\u65f6<br \/>\n<img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d721013b088506c489041e.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d721013b088506c489041e.png\" alt=\"\" \/><\/p><\/noscript>\n<h1>\u4f18\u5316<\/h1>\n<p>\u65f6\u95f4\u4e0a\u5df2\u7ecf\u5230\u6781\u9650\u4e86\uff0c\u76ee\u524d\u53ea\u6709\u4ece\u7a7a\u95f4\u4e0a\u8fdb\u884c\u4f18\u5316\u3002Eric Heitz\u63d0\u51fa\u4e86\u4e00\u79cd\u7b97\u6cd5\uff0c\u901a\u8fc7\u5728\u5c4f\u5e55\u7a7a\u95f4\u5c06\u8499\u7279\u5361\u6d1b\u8bef\u5dee\u8f6c\u5316\u4e3a<strong>\u84dd\u566a\u58f0<\/strong>\u5206\u5e03\uff0c\u6d88\u9664\u4e86\u968f\u673a\u91c7\u6837\u7684\u6742\u4e71\u611f\uff0c\u4ece\u800c\u63d0\u5347\u4e86\u6e32\u67d3\u8d28\u91cf<br \/>\n<img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d74e30c9d0f979b7e14151.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d74e30c9d0f979b7e14151.png\" alt=\"\" \/><\/p><\/noscript>\n<p>\u4ed6\u5728sobol\u7684\u57fa\u7840\u4e0a\uff0c\u5f15\u5165\u4e86\u6392\u5e8f\u3001\u6270\u4e71\u6d88\u9664\u4e86\u968f\u673a\u91c7\u6837\u7684\u6742\u4e71\u611f\uff0c\u4e14\u7b97\u6cd5\u6ca1\u6709\u4efb\u4f55\u51fd\u6570\uff0c\u53ea\u7528\u5230\u4e86\u4e58\u52a0\u4f4d\u8fd0\u7b97\uff0c\u6027\u80fd\u975e\u5e38\u597d<br \/>\n\u8fd9\u91cc\u91c7\u68371spp\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d751ddc9d0f979b7e16c9a.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d751ddc9d0f979b7e16c9a.png\" alt=\"\" \/><\/p><\/noscript>\n<p><img decoding=\"async\"   class=\"lazyload\" data-src=\"https:\/\/pic1.imgdb.cn\/item\/69d751f5c9d0f979b7e16ce7.png\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\" \/><\/p >\n<noscript><img decoding=\"async\" src=\"https:\/\/pic1.imgdb.cn\/item\/69d751f5c9d0f979b7e16ce7.png\" alt=\"\" \/><\/p><\/noscript>\n<p>\u53ef\u4ee5\u770b\u5230\u6548\u679c\u662f\u80fd\u63a5\u53d7\u7684<\/p>\n<h1>Reference<\/h1>\n<p>https:\/\/github.com\/unity-grenoble\/sampling_bluenoise_sig21<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u4f20\u7edf\u7684PCF\u901a\u5e38\u9700\u8981\u5728\u6bd4\u8f83\u9ad8\u7684\u91c7\u6837\u6b21\u6570\u624d\u80fd\u5f97\u5230\u4e00\u4e2a\u6bd4\u8f83\u597d\u7684\u6548\u679c\uff0c\u4f46\u56e0\u4e3a\u6bcf\u4e2auv\u90fd\u9700\u8981\u6267\u884cPCF\uff0c\u5f00\u9500\u662f\u6bd4\u8f83\u9ad8\u7684 \u5b9e\u65f6\u6e32\u67d3\u4e2d\uff0c &#8230;<\/p>","protected":false},"author":1,"featured_media":381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,5],"tags":[],"_links":{"self":[{"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/posts\/380"}],"collection":[{"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/chenglixue.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=380"}],"version-history":[{"count":1,"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/posts\/380\/revisions"}],"predecessor-version":[{"id":382,"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/posts\/380\/revisions\/382"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/chenglixue.top\/index.php?rest_route=\/wp\/v2\/media\/381"}],"wp:attachment":[{"href":"http:\/\/chenglixue.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/chenglixue.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=380"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/chenglixue.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}