Lady: making savegames easy

[Robin]

Thanks!

Well, many people use some kind of class system in their games, especially for entities (player objects, enemies...) and the like. The problem is that if you serialise a class instance as a table and then de-serialise it, it doesn't work as expected. That's where Lady comes in. It detects class instances and generates the right code to make everything work seamlessly.

[Snuux]

Look cool. But if I would solve the problem, I would create an additional table. And would use this table to record the data (health, attack power, and etc).
Watch your code, and it's very cool too. Continue develop! Thanks!)

[Robin]

Thanks.

I didn't understand what you mean in this part:

I would create an additional table. And would use this table to record the data (health, attack power, and etc).

Do you mean you would use a table instead of classes? Or use a single table instead of multiple tables to hold the state? Or something else?

[Snuux]

Something like this.

Code: Select all

Entity= Class('Entity')
Entity.stats = { hp = 100, dmg = 50, range = 5 }
function Entity.initialize()
  Entity.stats = loadSavedTable()
end
function Entity.save()
  saveTable(Entity.stats)
end

But now I starting understand, how your library can save my time and code...

[Robin]

Well, it took nearly 200 lines of code, but Joints are now supported.

With the Love-Jam going on, Lady should be the perfect way to easily add a save and load feature to your jam entry!

[Karai17]

A very helpful addition would be support for hump.vector (with an optional z and w param, since i use a custom vector3d lib too). Serializing vectors and then needing to reestablish their vectorness is annoying

Otherwise, nice lib!

[Robin]

To use hump.vector, simply register it:

Code: Select all

local lady = require 'lady'
local vector = lady.register_class(require 'hump.vector', 'vector')

Similarly for your vector3d.

Lady needs to know beforehand what kind of classes you're using, so it can do the right thing when loading a savegame.

[Karai17]

Ah! I haven't looked into how this works so I didn't know it was modular.

[prixt]

Hi I wasn't sure where to ask this, so I'm asking here.
I'm trying to use Lady for saving a roguelike map, but load_all is returning an error saying that on line 544 in lady argument #1 for function setfenv is nil. save_all works fine, I checked the savefile and everything seemed ok. How can I solve this?

[ejmr]

setfenv() was removed in Lua 5.2. LÖVE uses LuaJIT, however, which maintains a lot of compatibility with Lua 5.1 and thus still has setfenv(). So my guess is that you are trying to run your code with a verison of Lua that no longer supports setfenv().