# Tianke Youke

A Base for Secreting and Running at Night

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Okayyyyyyyy!!!

1. Vertices order determines face orientation.

e.g., f 1 2 3 and f 1 3 2 are 2 opposite faces

2. Another thing is, faces are invisible from backside by default!!!

In Meshlab here is a setting back-face which by default is single. If set it as double, then the face will be visible from backside.

Meanwhile, the Preview of MacOS also makes faces transparent from opposite orientation. Like this:

Finally my sphere is correct:

——晏殊《浣溪沙》

11月平均每日阅读43分钟，最高一天阅读4小时，总共21个小时。这意味着，这30天里，我大约有一整天的人生活在书里的世界。幸甚至哉！