How extend Unity3d editor

Question

I am using Unity3d in game development. For every project I can extend editor. How to extend Unity3d editor (for all projects, not for custom project)?

Answer 1

There is no real way to make a permanent extension (i.e. an extension that is there for every new project). You can however export your extension as a Unity package and import this whenever you create a new project. As per the documenentation on the linked page:

1. In the Project View, select all the asset files you want to export.
2. Choose Assets->Export Package... from the menubar.
3. Name and save the package anywhere you like.
4. Open the project you want to bring the assets into.
5. Choose Assets->Import Package... from the menubar.
6. Select your package file saved in step 3.

That should be the simplest way to easily import your custom extensions into each project.

Answer 2

For plugins intended to be used in many projects, but not changed in that project. Some people choose to build the plugin into a dll, then place the dll in the project rather than it's source code.

http://docs.unity3d.com/Manual/UsingDLL.html