{"topic":{"id":13769,"title":"实验 2.6 光线递归问题","slug":"topic","categoryId":56,"createdAt":"2024-10-28 08:45:51.105264","bumpedAt":"2024-11-07 10:27:16.397903","views":176,"postsCount":3,"highestPostNumber":3,"likeCount":0,"closed":false,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"想问一下在 cast_ray 函数中，是否只需要按照如下注释提示的步骤完成？是否需要在光线没有与物体相交时，判断光线有没有经过光源？我在完成文档要求函数后运行，加载 cube 模型，在 shininess 小于 1000 时，渲染结果正常；在 shininess 大于 1000，光源在（2, 2, 2），摄像机在（2, 2，2）时，渲染出来图像全为背景色，在想是不是应该考虑反射光线经过光源的情况。此外，我在调用菲涅尔定理计算的函数…","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":3788,"username":"yuaay7","name":"yuaay","avatarUrl":"/uploads/image/0a/56/0a56f8ca9eb19b35fa0731a93f3ff4851612f1de917fa84fbd936f8a3d95da4f.avif"},"tags":[]},"posts":[{"id":42164,"postNumber":1,"raw":"想问一下在 cast_ray 函数中，是否只需要按照如下注释提示的步骤完成？\n![image|690x409](/uploads/image/3d/13/3d134c903c63a8fb2c8df714d83534b294bc2723e2a0ce068b8bc26acfa38a4e.avif)\n是否需要在光线没有与物体相交时，判断光线有没有经过光源？\n我在完成文档要求函数后运行，加载 cube 模型，在 shininess 小于 1000 时，渲染结果正常；在 shininess 大于 1000，光源在（2, 2, 2），摄像机在（2, 2，2）时，渲染出来图像全为背景色，在想是不是应该考虑反射光线经过光源的情况。\n此外，我在调用菲涅尔定理计算的函数时，没有找到有关物体折射率变量，目前是自己设定的一个值。想问一下这里折射率是不是需要自己计算？\n![image|486x44](/uploads/image/5a/f0/5af06f13dff1582ae5d96622578a72c71a3efd8a285d70ddba9c7bdf4a23046d.avif)","cooked":"

想问一下在 cast_ray 函数中，是否只需要按照如下注释提示的步骤完成？
\n $\"image\"$
\n是否需要在光线没有与物体相交时，判断光线有没有经过光源？
\n我在完成文档要求函数后运行，加载 cube 模型，在 shininess 小于 1000 时，渲染结果正常；在 shininess 大于 1000，光源在（2, 2, 2），摄像机在（2, 2，2）时，渲染出来图像全为背景色，在想是不是应该考虑反射光线经过光源的情况。
\n此外，我在调用菲涅尔定理计算的函数时，没有找到有关物体折射率变量，目前是自己设定的一个值。想问一下这里折射率是不是需要自己计算？
\n $\"image\"$

\n","createdAt":"2024-10-28 08:45:51.345505","updatedAt":"2024-10-28 08:45:51.345505","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":209,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":3788,"username":"yuaay7","name":"yuaay","avatarUrl":"/uploads/image/0a/56/0a56f8ca9eb19b35fa0731a93f3ff4851612f1de917fa84fbd936f8a3d95da4f.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":42835,"postNumber":2,"raw":"为简单起见不用考虑反射后的光线经过光源的情况，只用判断场景内有 mesh 的物体间有没有发生相交，ior 自己设定一个值就可以了","cooked":"

为简单起见不用考虑反射后的光线经过光源的情况，只用判断场景内有 mesh 的物体间有没有发生相交，ior 自己设定一个值就可以了

\n","createdAt":"2024-11-07 09:03:42.375095","updatedAt":"2024-11-07 09:03:42.375095","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":55,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1484,"username":"storm314","name":null,"avatarUrl":"/uploads/image/82/4a/824ae9f755bc5939263c9836cf3262719c5e957f5f685b959d66efd39b5bcc59.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":42851,"postNumber":3,"raw":"好的，感谢🙏🏻","cooked":"

好的，感谢🙏🏻

\n","createdAt":"2024-11-07 10:27:16.397903","updatedAt":"2024-11-07 10:27:16.397903","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":6,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":3788,"username":"yuaay7","name":"yuaay","avatarUrl":"/uploads/image/0a/56/0a56f8ca9eb19b35fa0731a93f3ff4851612f1de917fa84fbd936f8a3d95da4f.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":2,"hasUrlPostNumber":true}