{"topic":{"id":13870,"title":"2.9 曲面简化最优位置的疑问","slug":"topic","categoryId":56,"createdAt":"2024-11-17 09:51:11.16864","bumpedAt":"2024-11-18 07:52:24.344037","views":159,"postsCount":2,"highestPostNumber":2,"likeCount":0,"closed":false,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"仔细琢磨了文档和网上寻找了几篇解析，这个最优坍缩位置应该就是那条边坍缩成的一个点的位置？也就是需不需要对.h 文件中这个函数进行修改，把最优坍缩位置的作为参数传递进去，顺便再把之前写的坍缩进行对应修改？还是要做其他操作。(有点没明白)","deletedAt":null,"isAnonymous":false,"category":{"id":56,"name":"计算机图形学","slug":"cg","color":"92278F"},"author":{"id":6145,"username":"SunXueHao","name":"rss","avatarUrl":null},"tags":[]},"posts":[{"id":43328,"postNumber":1,"raw":"仔细琢磨了文档和网上寻找了几篇解析，这个最优坍缩位置应该就是那条边坍缩成的一个点的位置？\n[grid mode=\"tile\"]\n![QQ 图片 20241117172934|690x305](/uploads/image/f8/c3/f8c3e94099533ea8fcc12dfac60c795b6cff6aceff53b39fee5db5367747919a.avif)\n![最优|690x116](/uploads/image/78/d2/78d2cadec683b259f3ac2b2f946594e8e37ea06c771521855794fa00b8b2f985.avif)\n[/grid]\n也就是需不需要对.h 文件中这个函数进行修改，把最优坍缩位置的作为参数传递进去，顺便再把之前写的坍缩进行对应修改？还是要做其他操作。(有点没明白)","cooked":"

仔细琢磨了文档和网上寻找了几篇解析，这个最优坍缩位置应该就是那条边坍缩成的一个点的位置？

$\"QQ$
\n $\"最优\"$

也就是需不需要对.h 文件中这个函数进行修改，把最优坍缩位置的作为参数传递进去，顺便再把之前写的坍缩进行对应修改？还是要做其他操作。(有点没明白)

\n","createdAt":"2024-11-17 09:51:11.391754","updatedAt":"2024-11-17 09:51:11.391754","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":125,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":6145,"username":"SunXueHao","name":"rss","avatarUrl":null,"admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":43339,"postNumber":2,"raw":"[quote=\"rss, post:1, topic:13870, username:SunXueHao\"]\n这个最优坍缩位置应该就是那条边坍缩成的一个点的位置？\n[/quote]\n\n是的。\n\n[quote=\"rss, post:1, topic:13870, username:SunXueHao\"]\n需不需要对.h 文件中这个函数进行修改，把最优坍缩位置的作为参数传递进去，顺便再把之前写的坍缩进行对应修改？\n[/quote]\n\n不需要修改 `collapse_edge` 的声明。坍缩 (collapse) 本身是一个通用的操作，所以这个函数只有一种固定的行为，就是把传入的 `e` 坍缩到它的中点。坍缩边到指定的位置的操作是间接实现的，也就是在坍缩完成后接收函数返回的新顶点，然后修改这个顶点的坐标到最优坍缩位置。","cooked":"

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这个最优坍缩位置应该就是那条边坍缩成的一个点的位置？
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是的。

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需不需要对.h 文件中这个函数进行修改，把最优坍缩位置的作为参数传递进去，顺便再把之前写的坍缩进行对应修改？
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不需要修改 collapse_edge 的声明。坍缩 (collapse) 本身是一个通用的操作，所以这个函数只有一种固定的行为，就是把传入的 e 坍缩到它的中点。坍缩边到指定的位置的操作是间接实现的，也就是在坍缩完成后接收函数返回的新顶点，然后修改这个顶点的坐标到最优坍缩位置。

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