{"id":1488,"date":"2015-06-30T20:31:27","date_gmt":"2015-06-30T12:31:27","guid":{"rendered":"http:\/\/www.animator.idv.tw\/?p=1488"},"modified":"2015-06-30T20:42:34","modified_gmt":"2015-06-30T12:42:34","slug":"%e7%9a%ae%e5%85%8b%e6%96%af%e8%88%87%e5%a4%a2%e5%b7%a5%e5%bb%a0%e7%99%bc%e8%a1%a8opensubdiv-3-0","status":"publish","type":"post","link":"https:\/\/www.animator.idv.tw\/?p=1488","title":{"rendered":"\u76ae\u514b\u65af\u8207\u5922\u5de5\u5ee0\u767c\u8868OpenSubdiv 3.0"},"content":{"rendered":"<p>\u4e4b\u524dILM\u8207\u5922\u5de5\u5ee0(Dreamworks)\u5206\u4eab\u8207\u5408\u4f5c\u958b\u767cOpenExr\u7684\u58d3\u7e2e\u6280\u8853\u4e4b\u5f8c\uff0c\u9019\u6b21\u767c\u8868\u4e86OpenSubdiv 3.0\u7684\u7248\u672c\uff0c\u9019\u500b\u7248\u672c\u76f8\u8f03\u65bc\u4e4b\u524d\u76842.0\u7248\uff0c\u901f\u5ea6\u589e\u9032\u4e86\u8a31\u591a\uff0c\u4e26\u5c07\u539f\u4f86\u6838\u5fc3\u5167\u90e8\u8868\u9054\u5e7e\u4f55\u7684Topology\u6240\u4f7f\u7528\u7684hbr(Hierarchical Boundary Representation) library\uff0c\u6539\u70ba\u65b0\u7684Vtr(Vectorized Topology Representation)\uff0c\u9019\u500b\u7248\u672c\u4e5f\u5e7e\u4e4e\u91cd\u65b0\u6539\u5beb\u4e86\u539f\u59cb\u78bc\uff0c\u8b93\u6548\u7387\u8b8a\u5f97\u66f4\u597d\uff0c\u4e26\u7c21\u5316API\u7684\u4f7f\u7528\u3002<br \/>\n<a href=\"https:\/\/www.animator.idv.tw\/wp-content\/uploads\/2015\/06\/graphics_osd3_insideout.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.animator.idv.tw\/wp-content\/uploads\/2015\/06\/graphics_osd3_insideout.png\" alt=\"graphics_osd3_insideout\" width=\"942\" height=\"420\" class=\"aligncenter size-full wp-image-1500\" srcset=\"https:\/\/www.animator.idv.tw\/wp-content\/uploads\/2015\/06\/graphics_osd3_insideout.png 942w, https:\/\/www.animator.idv.tw\/wp-content\/uploads\/2015\/06\/graphics_osd3_insideout-300x134.png 300w, https:\/\/www.animator.idv.tw\/wp-content\/uploads\/2015\/06\/graphics_osd3_insideout-150x67.png 150w\" sizes=\"(max-width: 942px) 100vw, 942px\" \/><\/a><br \/>\n\u65b0\u76843.0\u7248\u672c\u4f7f\u7528Vtr(<a href=\"http:\/\/graphics.pixar.com\/opensubdiv\/docs_3x_alpha\/vtr_overview.html\">Vectorized Topology Representation<\/a>)\u4e5f\u63d0\u5347\u4e86\u5728CPU\u8207GPU\u4e0a\u7684\u57f7\u884c\u6548\u7387\uff0c\u4e26\u652f\u63f4non-manifold topology(\u50cf\u662f\u6c92\u6709\u9023\u63a5Edge\u7684\u9762\u6216\u7a7a\u6d1e)\u3002OpenSubdiv\u7c21\u5316\u4e86\u7684GPU\u6838\u5fc3\u8207adaptive tesselation shader system\uff0c\u8b93\u6bcf\u683c\u756b\u9762\u5728\u6700\u9069\u5316(adaptive)\u7e6a\u88fd\u4e0b\u8f09\u5165\u7684\u901f\u5ea6\u66f4\u5feb\u3002<\/p>\n<p>3.0\u4e5f\u5be6\u4f5c\u4e86\u65b0\u7684Subdivision\u7684\u6838\u5fc3\u5c64(Sdc layer)\uff0c\u8b93\u5728\u4f4e\u968e\u5be6\u4f5csubdivision\u7684\u65b9\u6cd5\u4e00\u81f4\u5316\u3002Pixar\u4e5f\u5728GPU\u7684\u7d30\u5206(subdivision)\u6f14\u7b97\u6cd5\u6548\u7387\u52a0\u5feb\u4e8610\u500d\u3002\u5728\u9019\u500b\u7248\u672c\u4e2d\u4e5f\u6709\u4e00\u500b\u91cd\u9ede\uff0c\u900f\u904eSdc\u6838\u5fc3\uff0c\u5206\u96e2\u4e86\u5e7e\u4f55\u7db2\u683c(mesh)\u8207\u6578\u5b78(math)\u7684\u4f86\u63d0\u5347library\u7684\u6548\u7387\uff0c\u9084\u6709\u4f7f\u7528\u4e0a\u7684\u5f48\u6027\u3002\u4e0d\u53ea\u8b93\u5927\u578b\u7684\u5c08\u6848\u53ef\u4ee5\u4f7f\u7528\uff0c\u66f4\u53ef\u4ee5\u5728\u5c0f\u578b\u6216\u5b78\u751f\u7684\u5c08\u6848\u4e0a\u61c9\u7528\u3002<\/p>\n<p><a href=\"http:\/\/graphics.pixar.com\/opensubdiv\/docs\/intro_30.html\">OpenSubdiv 3.0\u65b0\u529f\u80fd<\/a><br \/>\n<a href=\"https:\/\/github.com\/PixarAnimationStudios\/OpenSubdiv\">OpenSubdiv 3.0 Github\u539f\u59cb\u78bc<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e4b\u524dILM\u8207\u5922\u5de5\u5ee0(Dreamworks)\u5206\u4eab\u8207\u5408\u4f5c\u958b\u767cOpenExr\u7684\u58d3\u7e2e\u6280\u8853\u4e4b\u5f8c\uff0c\u9019\u6b21\u767c\u8868\u4e86OpenSubdiv 3.0\u7684\u7248\u672c\uff0c\u9019\u500b\u7248\u672c\u76f8\u8f03\u65bc\u4e4b\u524d\u76842.0\u7248\uff0c\u901f\u5ea6\u589e\u9032\u4e86\u8a31\u591a\uff0c\u4e26\u5c07\u539f\u4f86\u6838\u5fc3\u5167\u90e8\u8868\u9054\u5e7e\u2026<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/www.animator.idv.tw\/?p=1488\">\u7e7c\u7e8c\u95b1\u8b80<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":1497,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[78,24,52,51],"_links":{"self":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1488"}],"collection":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1488"}],"version-history":[{"count":10,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1488\/revisions"}],"predecessor-version":[{"id":1508,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1488\/revisions\/1508"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=\/wp\/v2\/media\/1497"}],"wp:attachment":[{"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.animator.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}