{"topic":{"id":6639,"title":"关于 2.4 Whitted-Style Ray-Tracing 参数选择问题","slug":"topic","userId":1519,"categoryId":56,"createdAt":"2023-10-23 15:02:38.798665","bumpedAt":"2023-10-24 13:41:53.680365","views":275,"postsCount":2,"highestPostNumber":2,"likeCount":0,"closed":true,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"请问上图中调用该函数时 ior 项应从哪里获取；以及该部分 kd、ks 又分别指什么呢？","deletedAt":null,"isAnonymous":false,"isPrivate":false,"isMembersOnly":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":1519,"username":"educated","name":null,"avatarUrl":null},"realAuthor":{"id":1519,"username":"educated","name":null,"avatarUrl":null},"tags":[]},"posts":[{"id":14378,"postNumber":1,"raw":"![image|690x39](/uploads/image/d2/9e/d29e0061c9970cb41eb2d6d163413e69400a2f58921424242ee5fc95d1e53a0e.avif)\n请问上图中调用该函数时 ior 项应从哪里获取；\n![image|511x83](/uploads/image/3e/29/3e2926fb152d3951dbe91f09cb2686fb1b6a26d2e3e163ac932cdd029dfdd708.avif)\n以及该部分 kd、ks 又分别指什么呢？","cooked":"

$\"image\"$
\n请问上图中调用该函数时 ior 项应从哪里获取；
\n $\"image\"$
\n以及该部分 kd、ks 又分别指什么呢？

\n","createdAt":"2023-10-23 15:02:38.898885","updatedAt":"2023-10-23 15:02:38.898885","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":36,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1519,"username":"educated","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14404,"postNumber":2,"raw":"ior 就是折射率，可以自己根据实际设定一个值。\nkd, ks 分别是物体材质的漫反射系数和镜面反射系数，是一个 3 维的向量，大概的意思就是材质对于 r, g, b 三个通道颜色的吸收。类似的如下图的.mtl 文件中的物体材质\n![image|380x234](/uploads/image/12/c4/12c412510e9300f2c1c832f9fdb3e5fb2438e4c4b636fa046d29c4e0a280a44d.avif)","cooked":"

ior 就是折射率，可以自己根据实际设定一个值。
\nkd, ks 分别是物体材质的漫反射系数和镜面反射系数，是一个 3 维的向量，大概的意思就是材质对于 r, g, b 三个通道颜色的吸收。类似的如下图的.mtl 文件中的物体材质
\n $\"image\"$

\n","createdAt":"2023-10-24 13:41:53.680365","updatedAt":"2023-10-24 13:41:53.680365","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":94,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1489,"username":"yuanyouwen","name":"yuanyouwen","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":2,"hasUrlPostNumber":true}