LÖVE

Posted: **Tue Dec 19, 2017 9:02 am**

Hello,

I'm trying to make a 2D platformer that uses one spritesheet and spritebatch for all the foreground objects. However, I don't know how best to structure my code around Spritebatches. I have a Lua table that contains tables of quads like this:

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local spritedata = {
    player = {
        {0,0,8,16},
        {8,0,8,16}
    },
    brick = {
        {8,48,8,8}
    },
    ...
}

Which get turned into tables of quads in a helper function and then put into my player object for example, but setting the sprite like this seems kinda ugly. Also, if a wrote a function like updateSprite that takes a single Entity (player or enemy) as an argument, I couldn't use a static class variable for the animation quads because I don't know how to access it from an instance, like if there is a Player.quads/Enemy.quads that I set once, and I want to get at that value from within updateSprite(player/enemy).

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player:update(dt) 
sprites:set(player.sprite_id, player.quads[player.current_frame],player.x, player.y)
-- would like to have something like updateSprite(GameEntity)

Am I severely overthinking this? How do you abstract spritebatches elegantly?

Thanks

Posted: **Tue Dec 19, 2017 10:15 am**

Hello!

Maybe I didn't understand your question correctly, so, please correct me

How do you implement objects and classes? There are several ways to do it in lua.
For example (using metatables) for me is not a problem to access static class variable from an instance.
http://lua-users.org/wiki/SimpleLuaClasses
Just like that:

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Player.quads = ... --once set up quads
local player1 = Player.create()
local player2 = Player.create()

function updateSprite(player)
    --use player.quads here
end

updateSprite(player1)

Posted: **Fri Dec 22, 2017 5:18 am**

Thanks for the response!

I use metatables as well. Sorry I'm just being dumb. For some reason I thought you couldn't do that outside of a method you call in the main love methods or it wouldn't get done. But I guess that gets done when you require the file.

LÖVE

Elegant SpriteBatch Usage

Elegant SpriteBatch Usage

Re: Elegant SpriteBatch Usage

Re: Elegant SpriteBatch Usage