> For the complete documentation index, see [llms.txt](https://flutter2015.firefirestyle.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://flutter2015.firefirestyle.net/physics2d/doc-1.md).

# \[@]democollision without friction

2D physics test

<https://github.com/kyorohiro/hello_skyengine/tree/master/ph_2d_boun_no_friction>

![](https://1814295318-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M23mFK0BQXfvUtsV5Gz%2F-M23mHdwSyo8rV1dBqZS%2F-M23mPD3d_TsdRaqsQaa%2Fscreen.png?generation=1583849518626294\&alt=media)

```
// following code is checked in 2016/01/13
//
```