{"topic":{"id":6622,"title":"渲染部分实验关于法线变换","slug":"topic","categoryId":56,"createdAt":"2023-10-22 12:44:45.041169","bumpedAt":"2023-10-23 03:07:18.565988","views":273,"postsCount":3,"highestPostNumber":3,"likeCount":0,"closed":true,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"这里说将法线向量变换到世界坐标系但是文档里说是变换到相机坐标系请问应该变换到哪个坐标系呢","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":1081,"username":"KON","name":null,"avatarUrl":"/uploads/image/9f/35/9f3549f065dc7f323da5ebdb5fce01f65bbf19dbd566d5b3d817a08a7b59e7fd.avif"},"tags":[]},"posts":[{"id":14326,"postNumber":1,"raw":"![图片|690x179](/uploads/image/25/d4/25d4cf6f5989129f90beb9667e1415ea8a15b209b37a26d0bc5d0a6a266567e2.avif)\n\n这里说将法线向量变换到世界坐标系\n![图片|690x53](/uploads/image/c4/55/c4559f77c7ce2b31742aebd2ec9e0c28cb28b49924a82f03f37e0e2df5de6241.avif)\n但是文档里说是变换到相机坐标系\n\n请问应该变换到哪个坐标系呢","cooked":"

$\"图片\"$

这里说将法线向量变换到世界坐标系
\n $\"图片\"$
\n但是文档里说是变换到相机坐标系

请问应该变换到哪个坐标系呢

\n","createdAt":"2023-10-22 12:44:45.125339","updatedAt":"2023-10-23 04:47:42.315099","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":52,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":1081,"username":"KON","name":null,"avatarUrl":"/uploads/image/9f/35/9f3549f065dc7f323da5ebdb5fce01f65bbf19dbd566d5b3d817a08a7b59e7fd.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14336,"postNumber":2,"raw":"我记得 pdf 版文档中提到过，转换到世界坐标系或是相机坐标系都可以。如果是转换到世界坐标系，则还要在 vertex shader 函数外再把法线转换到相机坐标系，以供插值时使用。","cooked":"

我记得 pdf 版文档中提到过，转换到世界坐标系或是相机坐标系都可以。如果是转换到世界坐标系，则还要在 vertex shader 函数外再把法线转换到相机坐标系，以供插值时使用。

\n","createdAt":"2023-10-22 16:41:10.090327","updatedAt":"2023-10-22 16:50:07.663684","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":73,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":3,"publicVersion":3,"deletedAt":null,"isAnonymous":false,"user":{"id":1508,"username":"tropher","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14343,"postNumber":3,"raw":"vertex shader 中转换到相机或者世界坐标系均可。转化到哪个坐标系取决于后续你想在哪个坐标系做插值。比如你将顶点坐标转化到了相机坐标系，那么你就可以把法线也转化到相机坐标系保持一致。世界坐标系也是同理","cooked":"

vertex shader 中转换到相机或者世界坐标系均可。转化到哪个坐标系取决于后续你想在哪个坐标系做插值。比如你将顶点坐标转化到了相机坐标系，那么你就可以把法线也转化到相机坐标系保持一致。世界坐标系也是同理

\n","createdAt":"2023-10-23 03:07:18.565988","updatedAt":"2023-10-23 03:07:18.565988","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":93,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1488,"username":"roland","name":"李昌洲","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":1,"hasUrlPostNumber":false}