{"topic":{"id":7663,"title":"实验 2.4 中全反射时渲染结果","slug":"topic","categoryId":56,"createdAt":"2023-12-05 04:26:33.411393","bumpedAt":"2023-12-08 03:32:50.756637","views":289,"postsCount":6,"highestPostNumber":6,"likeCount":2,"closed":true,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"请问为什么把 shininess 调到大于 1000 时渲染结果会出现一片黑，下面是全反射情况的代码","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":1638,"username":"qianyu","name":null,"avatarUrl":null},"tags":[]},"posts":[{"id":18619,"postNumber":1,"raw":"请问为什么把 shininess 调到大于 1000 时渲染结果会出现一片黑，下面是全反射情况的代码\n![image|690x293](/uploads/image/d5/07/d50724b3b40107ff80dcc91a5271edfb0543e4518a0a4d5455949f190e5f6f51.avif)","cooked":"

请问为什么把 shininess 调到大于 1000 时渲染结果会出现一片黑，下面是全反射情况的代码
\n $\"image\"$

\n","createdAt":"2023-12-05 04:26:33.571135","updatedAt":"2023-12-05 11:31:27.898668","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":36,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":1638,"username":"qianyu","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":18636,"postNumber":2,"raw":"我也遇到这个现象了，我和你的代码逻辑基本一致，感觉这样写确实会黑漆漆一片，因为光碰到物体表面都被反射走了，能看到的只可能是光源，然而光源没有大小，所以啥都看不见。","cooked":"

我也遇到这个现象了，我和你的代码逻辑基本一致，感觉这样写确实会黑漆漆一片，因为光碰到物体表面都被反射走了，能看到的只可能是光源，然而光源没有大小，所以啥都看不见。

\n","createdAt":"2023-12-05 09:14:42.159034","updatedAt":"2023-12-05 09:14:42.159034","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":81,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1565,"username":"Wendge","name":null,"avatarUrl":"/uploads/image/5a/00/5a006af93eb41743770c39a7d2b22059ed76912d1b6ebc17afc752170b201b91.avif","admin":false,"moderator":false,"signatureRaw":"存者且偷生，死者长已矣","signatureCooked":"

存者且偷生，死者长已矣

\n"}},{"id":18647,"postNumber":3,"raw":"因为按照我们的实验设定，镜面材质的物体自身是没有颜色的，它表面的颜色完全由所反射的环境颜色决定。而如果场景中没有其他物体可供反射，所有射线都求交失败就会都返回 (0, 0, 0) 颜色（黑色），导致整个物体全黑。","cooked":"

因为按照我们的实验设定，镜面材质的物体自身是没有颜色的，它表面的颜色完全由所反射的环境颜色决定。而如果场景中没有其他物体可供反射，所有射线都求交失败就会都返回 (0, 0, 0) 颜色（黑色），导致整个物体全黑。

\n","createdAt":"2023-12-05 11:33:32.206338","updatedAt":"2023-12-05 11:33:32.206338","replyToPostNumber":null,"replyCount":0,"likeCount":1,"wordCount":97,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"❤️","count":1,"users":[{"id":1638,"username":"qianyu","name":null}],"hasReacted":false}],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1381,"username":"greyishsong","name":"greyishsong","avatarUrl":"/uploads/image/da/bc/dabc731b0311f59850625bbeb55ed969fcfac0430c5ef0f68441e5466b7aa496.avif","admin":false,"moderator":true,"signatureRaw":null,"signatureCooked":null}},{"id":18651,"postNumber":4,"raw":"加入了其他可反射的物体之后，为什么镜面材质的物体依旧是纯黑的\n![image|670x500](/uploads/image/4d/b1/4db141e6108e96e60148d3e4f1678bfbc3accc94dddd871aa65630233c425478.avif)","cooked":"

加入了其他可反射的物体之后，为什么镜面材质的物体依旧是纯黑的
\n $\"image\"$

\n","createdAt":"2023-12-05 12:19:09.572846","updatedAt":"2023-12-05 13:20:17.980141","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":31,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":1638,"username":"qianyu","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":18652,"postNumber":5,"raw":"重新编译后镜面材质的物体又出现了不理解的结果\n![image|660x500](/uploads/image/e5/8b/e58bfa4b04b9559915d9591897292b3e402297eba12ee9af7807763fdcebb8b7.avif)","cooked":"

重新编译后镜面材质的物体又出现了不理解的结果
\n $\"image\"$

\n","createdAt":"2023-12-05 12:24:46.093924","updatedAt":"2023-12-05 12:24:46.093924","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":23,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1638,"username":"qianyu","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":18835,"postNumber":6,"raw":"如果镜面的材质还是一片黑，可以调整一下光源和相机的位置，如果仍然无法出现反射，那么需要检查一下全反射的实现逻辑以及法线方向是否存在问题","cooked":"

如果镜面的材质还是一片黑，可以调整一下光源和相机的位置，如果仍然无法出现反射，那么需要检查一下全反射的实现逻辑以及法线方向是否存在问题

\n","createdAt":"2023-12-08 03:32:50.756637","updatedAt":"2023-12-08 03:32:50.756637","replyToPostNumber":null,"replyCount":0,"likeCount":1,"wordCount":67,"liked":false,"bookmarked":false,"polls":[],"reactions":[{"reaction":"❤️","count":1,"users":[{"id":1638,"username":"qianyu","name":null}],"hasReacted":false}],"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}