Crash

[SliiX]

So, I am working on an infinite map generation thing for a 2d game and I have it about half way done, but I was bug testing and decided to go super far out and see if it affects performance. Anyways, once I got to about 42,000 (8 tile x 8 tile ) chunks with (64 pixel x 64 pixel) tiles in each chunk and the game program just turns off completely? Anyone know what could be the cause of this?

[pgimeno]

It appears that you're reaching LuaJIT's memory limit. I've tried with LuaJIT-2.1.0-beta3 with GC64 enabled and it doesn't crash.

[SliiX]

Alright cool thanks! Is there a way to not store the map data in memory? Or, do I have to use luaJIT 2.1.0?

Edit:

So I did some research and it appears I made a weird mistake in the code below:

Code: Select all

local chunks = {}
local loaded = {}

function render()
	-- this is supposed to reset the loaded table
	-- but apparently this does not clear it from memory?
	loaded = {}

	for i = 1,#chunks do
		-- bunch of if statements
		loaded[#loaded+1] = chunks[i]
	end
end

function love.update()
	render()
end
    

[pgimeno]

Alright cool thanks! Is there a way to not store the map data in memory? Or, do I have to use luaJIT 2.1.0?

Edit:

So I did some research and it appears I made a weird mistake in the code below:

Code: Select all

local chunks = {}
local loaded = {}

function render()
	-- this is supposed to reset the loaded table
	-- but apparently this does not clear it from memory?
	loaded = {}

	for i = 1,#chunks do
		-- bunch of if statements
		loaded[#loaded+1] = chunks[i]
	end
end

function love.update()
	render()
end
    

You can free up some map data from memory. Chunk-based programs (e.g. Minetest) usually use a disk database to store generated chunks on and free them from memory.

Removing the call to world:render() does not fix the crash, so that's not the problem.

[SliiX]

The disk thing is a good idea and is gonna need to me implemented anyways, I went ahead and made a much smaller and quicker and just generally less messy version of this and its working a lot better. With that being said, is there a fast and efficient way of storing tables on disk?

[pgimeno]

The disk thing is a good idea and is gonna need to me implemented anyways, I went ahead and made a much smaller and quicker and just generally less messy version of this and its working a lot better. With that being said, is there a fast and efficient way of storing tables on disk?

You need serialization for that. How fast and efficient depends on the serialization code. Take a look at
https://github.com/gvx/bitser for example.

[AuahDark]

You can workaround the memory limit by using love.data.newByteData and FFI then store your data there. However, depending on how you structure the game, it may be not possible.

[SliiX]

I solved the problem thanks for the support, was really helpful!