What is involved in changing 3.9(5) to 4.0?

[andrewseburn]

Just curious--

If I have a theme completed in Stepmania 3.95, what work (specifically) needs to be done to make it compatible as a Stepmania 4.0 theme?

Metrics changes?
Graphics changes?
Rebuilding from the ground up?

[sharksoda]

you need to recode it completely.

EDIT: from Midiman's FTP:

Midimans quick easy comparison of XML to LUA

-XML-
<ActorFrame>					// The "Nail" or "Container" of the file
	<Layer					// The Type Header
		Name=Stuff			// Parameters
		File=Stuff
		Command=Stuff
	/>						// Closes the header
/>							// Ends the "Nail" or "Container"

-LUA-
local t = Def.ActorFrame{			// local * is a variable, can be used to store variables or work as a container
	LoadActor("Stuff") .. {			// ".. {" is equivalent to "<", but in reverse
		InitCommand=cmd("Stuff");	// cmd("String") eliminates the possiblity of a variable
	};						// closes the layer
};							// closes the container
return t;						// "finalize" the container, for security
-LUA with variables-
local numStages = PREFSMAN:GetPreference( "SongsPerPlay" );	// Let's setup a variable from SM itself, this is an integer.
local t = Def.ActorFrame{							// Again, setup a container
	LoadActor("Stuff") .. {
		InitCommand=cmd("setstate,numStages");		// Set State to the integer we provide as a variable
	};
};
return t;

[andrewseburn]

Crazy stuff--
Don't think I have the time to learn all that. Guess my theme will just stay on 3.9 for now

Thanks Shake.