{"topic":{"id":6976,"title":"实验 2.4whitted-style 中 shiness 的问题","slug":"topic","categoryId":56,"createdAt":"2023-11-02 14:14:11.456934","bumpedAt":"2023-11-03 07:29:39.408195","views":238,"postsCount":2,"highestPostNumber":2,"likeCount":0,"closed":true,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"为什么拖动 object 的 shiness bar 到大于 1000 后，输出的 shiness 还是默认的 5？是不是 material 调用的时间不对？下面是 cast_ray 里的判断代码，这里的 result 是来自 trace 的返回结果。下面是 trace 返回的值我在 trace 函数中尝试输出 material.shiness 也是默认值 5。","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":70,"username":"Yee","name":null,"avatarUrl":"/uploads/image/f1/e5/f1e5b156bff62b19ee51d2fed3ab2892df5757d6ca014d80f73392e9fa428364.avif"},"tags":[]},"posts":[{"id":15752,"postNumber":1,"raw":"为什么拖动 object 的 shiness bar 到大于 1000 后，输出的 shiness 还是默认的 5？是不是 material 调用的时间不对？\n下面是 cast_ray 里的判断代码，这里的 result 是来自 trace 的返回结果。\n![搜狗截图 20231102220257|690x135](/uploads/image/b7/7f/b77fa66ed282e5e546d1498a1608d078bcc80065a786a6e2b775f197f6a0a3c3.avif)\n\n下面是 trace 返回的值\n![image|486x87](/uploads/image/4f/32/4f32f58c728505b43fc5a120b686898229cb20b93a28ca412ef39c1e47e720dc.avif)\n\n我在 trace 函数中尝试输出 material.shiness 也是默认值 5。","cooked":"

为什么拖动 object 的 shiness bar 到大于 1000 后，输出的 shiness 还是默认的 5？是不是 material 调用的时间不对？
\n下面是 cast_ray 里的判断代码，这里的 result 是来自 trace 的返回结果。
\n $\"搜狗截图$

下面是 trace 返回的值
\n $\"image\"$

我在 trace 函数中尝试输出 material.shiness 也是默认值 5。

\n","createdAt":"2023-11-02 14:14:11.54382","updatedAt":"2023-11-02 14:14:11.54382","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":70,"username":"Yee","name":null,"avatarUrl":"/uploads/image/f1/e5/f1e5b156bff62b19ee51d2fed3ab2892df5757d6ca014d80f73392e9fa428364.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":15877,"postNumber":2,"raw":"如果程序的写法正确，shiness 应该会返回更改后的结果。也许是在返回 result 之前没有对 result 中的 shiness 进行有效更改，或者在场景中有多个物体时，输出的 shiness 是其他未更改物体的 shiness，再或者是出现了错误的相交判断，从而导致输出了默认值","cooked":"

如果程序的写法正确，shiness 应该会返回更改后的结果。也许是在返回 result 之前没有对 result 中的 shiness 进行有效更改，或者在场景中有多个物体时，输出的 shiness 是其他未更改物体的 shiness，再或者是出现了错误的相交判断，从而导致输出了默认值

\n","createdAt":"2023-11-03 07:29:39.408195","updatedAt":"2023-11-03 07:29:39.408195","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":97,"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":2,"hasUrlPostNumber":true}