In the Ray Design Agents documentation the Ray Perception parameter Ray Layer Mask is not mentioned. I am a bit confused about what does it do and if it interacts with the Detectable Tags parameter.

![Screenshot from 2020-04-12 18-57-18](https://user-images.githubusercontent.com/3236037

Great tutorial! It clears up a lot of my questions about various effects.

Minor complaint: Focal length is size of the lens. Focal distance is the distance between the camera and the focal point.

pyscript文件夹下建立一个头文件， 命名为
py_docs.h:

PyDoc_STRVAR(createCellEntity_docs,
"sha3_512([data]) -> SHA3 object\n\
\n\
Return a new SHA3 hash object with a hashbit length of 64 bytes.");

PyDoc_STRVAR(createCellEntityInNewSpace_docs,
"sha3_512([data]) -> SHA3 object\n\
\n\
Return a new SHA3 hash object with a hashbit length of 64 bytes.");

然后将所有api的英文描述写入，PyDoc_STRVAR。
未来如果有其他文档

(请尽量按照下面提示内容填写，有助于我们快速定位和解决问题，感谢配合。否则直接关闭。)

(重要！问题分类)

• 测试开发环境AirtestIDE使用问题 -> https://github.com/AirtestProject/AirtestIDE/issues
• 控件识别、树状结构、poco库报错 -> https://github.com/AirtestProject/Poco/issues
• 图像识别、设备控制相关问题 -> 按下面的步骤

描述问题bug
(简洁清晰得概括一下遇到的问题是什么。或者是报错的traceback信息。)

Linux执行airtest脚本报"There is no SIFT module in your OpenCV environment！"

根据https://github.com/AirtestPr

What would you like to submit? (put an 'x' inside the bracket that applies)

• [x ] question
• bug report
• feature request

Issue description

Is the matrix-matrix multiplication function (Dot(matrixA, matrixB)) documented anywhere? I can't find the documentation on the accord-framework.net website and the code appears to be generated from .tt files.

The ability to move around by rolling a hamster ball

Like this: https://gfycat.com/OpulentExhaustedGoldenretriever

I'll try and contact the author on reddit: https://www.reddit.com/user/Reil

The title is pretty much self-explanatory. This feels like an amazing solution for UI authoring but Non-Chinese speaking folks like myself are struggling to understand how it works. Please translate it, it's been a long time since this is out.

Need to document this page http://docs.forgepowered.com/UnityIntegration/network-object-without-prefab

Remove any following parts if does not have details about

Describe the bug
在测试poco官方提供的tutorial的时候，总是出现错误，按照这个代码运行的时候，拖动星星的顺序是从左到右第一个，第三个，第五个，然后就运行不下去了，甚至在拖动第三个的时候也停止了，

![qq 20190306170237](https://user-images.githubusercontent.com/18191658/53869373-0e5d0e00-4033-11e

Althougt code can be commented in the scripts, could be great to generate automatic documentation for the scripts and host it in the gh-pages branch of this repository.

In this way we can have a presentation web for the library and also the related documentation on how the API works.

I have checked DocFX and it seems it's possible to implement the pipeline for hosting the documentation as st