Hello, I want to fork this plugin in order to create two ones:

• stairs creation (you can set number of stairs, dimension and direction changing...)
• roof creation (you specify a base shape and automatically create a roof with that shape)

That cannot be done with that tool because they can need more point and also It can be done with more specific parameter to be more user friendly.
I think that this can be done easily starting from this plugin and creating small customization, but I do not find the source code, is it available?