> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2020/03/14.md).

# 14

直线和周期。方式决定效果。

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M8iFCzaIpXf8zXqpE6I%2Fuploads%2FUcdEeXr650OKesmNxesc%2F29711651280496_.pic.jpg?alt=media\&token=25886e88-051f-434e-b576-2a26a0df147f)