Is the core Unity Engine itself written in C++ or C#/Mono-based code?
The Unity runtime is written in C/C++. This runtime is used in any build you create using the editor - for webplayers and plugins it is installed separate from your build, whereas it is included in it for stand-alones and other platforms such as iPhone and Wii.
The editor is built on the Unity runtime and additionally includes editor-specific C/C++ binaries.
Wrapped around the Unity core is a layer which allows for .net access to core functionality. This layer is used for user scripting and for most of the editor UI.
Unity is written in C++, with the following exceptions:
The editor application's UI is written in C#, using mostly the same API that we expose to game developers. (We have access to a few API's that we don't expose (yet), but not that many)
This can definitely be answered in more detail by one of the UT engineers, but as far as I know, it's a mixture of both. Certainly a lot of the core code is in c++, including the physics engine and sound engine, however as far as I understand, much (if not all) of the Editor UI itself, including the terrain engine and its editing tools, is written in c# using Unity's own editor scripting.
Wow why do you ask that?
OPS: Sorry for old threads …
I know because Unity 3D was written in C# Yes Why I recognized since Net Frameworks 4.6 If I forget to install before. I thought Unity 3D was embedded by mkbundle and cl Hahahaaaaaaa! I caught that. And Unity Editor looks common like without “Apply”, “Cancel” and “OK” That is why it was written by C# / Mono = CORRECT! Because I have checked UnityEngine.dll and UnityEditor.dll in ILSpy that is why all are written in C# / Mono!!!
You know it is 2. successor “WaveEngine” = / = “UnityEngine”
Now we have 2 different Game Engine written by C# / Mono. I have downloaded WaveEditor it is really cool so like Unity 3D with C# script.
That is why It is correct. No only C++/+
But Unity 3D’s Editor was embedded by mkbundle and cl with mono-2.0-sgen.dll and mono-2.0-boehm.dll I will check if Editor of Unity 3D has 2 requiered dlls or did you embed with BoxedApp Packer or Enigma Protector? Ahaaaaa I see that ILSpy says Editor.exe has not managed assembly - I know that is correct if developer has both dlls of /MONO_INSTALLDIR/bin into own executable. Am I right?
Sorry for my bad English