UnityCsReference | Unity C # reference source code | Game Engine library

This is probably a very niche question, but what are the specific differences between an asset bundle and a cached bundle for the asset bundle system that Unity 4 used? I'm curious how cached files differ to asset bundles and what, if any, different properties change from both types of files? I.E. What happens to asset bundles when they are cached through WWW.LoadFromCacheOrDownload?

Unity unfortunately doesn't have this process documented as the open source code calls an internal function called INTERNAL_CALL_WWW(this, url, ref hash, crc), which is given the instance of WWW, the string of the URL, a Hash128 and a UINT called crc with a default value of 0. (Referenced decompiled 5.3.2p2 code, 2017+ code is on the official Unity GitHub, but seems to differ from Unity 2015 code).

The Unity 2017 code leads to the private extern static IntPtr CreateCached(DownloadHandlerAssetBundle obj, string url, string name, Hash128 hash, uint crc); external method, which isn't documented either.

Furthermore, what actually happens when an asset bundle is cached so that the engine can recognise the file is in cache and doesn't need to be downloaded? Is it just simply that it searches for the hashed name in the cache, or does it do something more intricate?

Frostrix

I am messing with Unity's cameras for a school project, my plan was to change the way that coordinates are projected onto the projection plane to a projection onto a sphere using sphere coordinates. But, getting to the actual math behind the cameras has been a bit of a pain.

My first method involved messing with render textures but, theoretically, that won't work because the camera has already rendered a texture which I am modifying.

Next I tried to get into the code for the base camera, maybe make a copy of the camera to modify without messing the original, but then I ran into this, the code that sets all of the camera's parameters for the editor, I saw the reference to a few .h files.

Where can I access these files? I found files with the same names but not related to Unity. They were also different from each-other, making me think that the file above isn't referring to some sort of industry standard, but it might be.

I'm C++ developer and never done C# before. By curiosity, I was looking at the code of Unity and I do not sure to understand the following code:

I am trying to create a custom class attribute for Unity that prevents a targeted MonoBehaviour from existing on more than one object in a scene. I have done some searching and it's been said that in order to get the Type of class the attribute is targeting, I should use the constructor of the attribute; it can't be done using reflection