{"topic":{"id":6664,"title":"实验 2.2 软光栅化渲染器渲染结果问题","slug":"topic","categoryId":56,"createdAt":"2023-10-25 15:01:26.783935","bumpedAt":"2023-10-26 12:06:28.429199","views":387,"postsCount":4,"highestPostNumber":4,"likeCount":0,"closed":true,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"如题，渲染结果出现以下问题：翻看以前帖子，有过类似问题，但我没有得到有用的回复，所以想再开一个帖子请教一下。 diffuse 和 specular 如上，可以看到都有黑色三角未填充，感觉像是要用到的 world_normal 有问题？这是我对 normal 的操作，先变换到世界坐标系，然后再插值。其中 z1,z2,z3 为顶点乘完 MVP 矩阵后的第四维。 zone 是 alpha beta gamma 的元组请大佬们看一看到底…","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":1547,"username":"R-oh","name":"QQ小孩","avatarUrl":null},"tags":[]},"posts":[{"id":14452,"postNumber":1,"raw":"如题，渲染结果出现以下问题：\n![4|632x500](/uploads/image/47/d9/47d9a42848e5211205ba3a54fa5645836f8095f409462ee4084811170255b57b.avif)\n翻看以前帖子，有过类似问题，但我没有得到有用的回复，所以想再开一个帖子请教一下。\n[grid mode=\"tile\"]\n![3|642x500](/uploads/image/ae/0c/ae0cb31f4a2cae699701dc0092a0623efa78d0c17fe76136bf23480eeb0b0157.avif)\n![5|641x500](/uploads/image/04/18/04180c0958623ba9a8838f568a2fdd9e02f8c8e3c9885f0d8380e1ea31e0bea2.avif)\n[/grid]\ndiffuse 和 specular 如上，可以看到都有黑色三角未填充，感觉像是要用到的 world_normal 有问题？\n[grid mode=\"tile\"]\n![2|690x82](/uploads/image/03/3e/033e3e36c8238655bbdbfc69f82d0b9c90bf4ca85017bbde88410245285858bc.avif)\n![1|690x147](/uploads/image/22/2b/222bf243e7c877582d6b0fc960f0fd16c251bdbc99dc29c3d670f1121bc74044.avif)\n[/grid]\n这是我对 normal 的操作，先变换到世界坐标系，然后再插值。\n其中 z1,z2,z3 为顶点乘完 MVP 矩阵后的第四维。\nzone 是 alpha beta gamma 的元组\n请大佬们看一看到底是哪出了问题 :loudly_crying_face:","cooked":"

如题，渲染结果出现以下问题：
\n $\"4\"$
\n翻看以前帖子，有过类似问题，但我没有得到有用的回复，所以想再开一个帖子请教一下。

$\"3\"$
\n $\"5\"$

diffuse 和 specular 如上，可以看到都有黑色三角未填充，感觉像是要用到的 world_normal 有问题？

$\"2\"$
\n $\"1\"$

这是我对 normal 的操作，先变换到世界坐标系，然后再插值。
\n其中 z1,z2,z3 为顶点乘完 MVP 矩阵后的第四维。
\nzone 是 alpha beta gamma 的元组
\n请大佬们看一看到底是哪出了问题 😭

\n","createdAt":"2023-10-25 15:01:26.881714","updatedAt":"2023-10-29 04:29:49.093874","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":164,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":2,"publicVersion":2,"deletedAt":null,"isAnonymous":false,"user":{"id":1547,"username":"R-oh","name":"QQ小孩","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14493,"postNumber":2,"raw":"我注意到你渲染的模型身上有一些小竖线，这可能是在三角形光栅化时忽略了边界，应该要把边界也考虑进去。","cooked":"

我注意到你渲染的模型身上有一些小竖线，这可能是在三角形光栅化时忽略了边界，应该要把边界也考虑进去。

\n","createdAt":"2023-10-25 16:00:35.750124","updatedAt":"2023-10-25 16:00:35.750124","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":49,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1508,"username":"tropher","name":null,"avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14507,"postNumber":3,"raw":"补充一下：\n![7|627x500](/uploads/image/17/83/17839f8c4003a94c9cf9d4b944f6764986bfde0702f0e29500c42895b05574cc.avif)\n这个是环境光把参数拉高了一点得到的，是没有黑三角的，而只有漫反射和高光渲染时出现了问题，所以我猜测整体上应该是没什么问题，问题出在漫反射，高光特有的一些参数上（比如法线）？","cooked":"

补充一下：
\n $\"7\"$
\n这个是环境光把参数拉高了一点得到的，是没有黑三角的，而只有漫反射和高光渲染时出现了问题，所以我猜测整体上应该是没什么问题，问题出在漫反射，高光特有的一些参数上（比如法线）？

\n","createdAt":"2023-10-25 16:44:48.376045","updatedAt":"2023-10-25 16:44:48.376045","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":91,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":1547,"username":"R-oh","name":"QQ小孩","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":14771,"postNumber":4,"raw":"如果只在漫反射或者高光上出现问题，那应该就是用到的法线向量或是点光源发射的光线向量出现了问题，你可以输出一下他们的值看看是否存在异常","cooked":"

如果只在漫反射或者高光上出现问题，那应该就是用到的法线向量或是点光源发射的光线向量出现了问题，你可以输出一下他们的值看看是否存在异常

\n","createdAt":"2023-10-26 12:06:28.429199","updatedAt":"2023-10-26 12:06:28.429199","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":66,"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}