LUBE (Networking Library)

[Deif]

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function Server:update(dt)

self.server:send(function() -- the following should really be in a separate function but I put it here for easy reading (taken from BlackBullet below)
	local data = {}
	for n,p in pairs(self.player) do
		lube.bin:setseperators(string.char(1),string.char(2))
		data[n] = lube.bin:pack(p:getdata()) -- p:getdata() is where you return your x and y coords as a table
	end
	lube.bin:setseperators(string.char(30),string.char(31))
	local datatable = lube.bin:pack(data)
	return datatable
end)

end

Note the separators we used to pack - these can be anything you choose, I just chose smily faces and triangles. When you unpack, you just do it the opposite way. Basically you're just packing up the coords of each player separated by a certain char, then packing each player separated by a certain char so you send a single string across the network. When it reaches the other side, you unpack the players, then the coords of the players so you get your tables back.

Code: Select all

function Client.receive(data)

		lube.bin:setseperators(string.char(30),string.char(31))
		local datatable = lube.bin:unpack(data)
		local playertable = {}
                lube.bin:setseperators(string.char(1),string.char(2))
		for n,p in pairs(datatable) do			
			playertable[n] = lube.bin:unpack(p)
			if state.player[n] == nil then -- if player doesn't exist in the client table, then we need to make one
				state.player[n] = Player.create()
			end
			if n ~= state.index then -- otherwise we just update the coords
				state.player[n]:setdata(playertable[n]) -- setdata() function the exact opposite of getdata() we saw earlier
			end
		end	
end

The code is probably not the best and you'll want to make some changes for when a client connects to the server and when a client disconnects.

[BlackBulletIV]

Code: Select all

-- the following should be in a function but I put it here for easy reading

In-line functions should help:

Code: Select all

self.server:send(function()
	local data = {}
	for n,p in pairs(self.player) do
		lube.bin:setseperators(string.char(1),string.char(2))
		data[n] = lube.bin:pack(p:getdata()) -- p:getdata() is where you return your x and y coords as a table
	end
	lube.bin:setseperators(string.char(30),string.char(31))
	local datatable = lube.bin:pack(data)
	return datatable
end)

[Deif]

Oh ok, that helps - thanks; learn something everyday.

[BlackBulletIV]

learn something everyday.

So true.

[Bambo]

I heard somewhere that you should never let the player decide its own coordinates? shouldn't the client just request to move then the server does all the moving then sends all the information back to all clients?

[TechnoCat]

I heard somewhere that you should never let the player decide its own coordinates? shouldn't the client just request to move then the server does all the moving then sends all the information back to all clients?

I think for now you can forget about preventing cheating. I'd learn the easy way first then do anti-cheat later.

[Bambo]

I heard somewhere that you should never let the player decide its own coordinates? shouldn't the client just request to move then the server does all the moving then sends all the information back to all clients?

I think for now you can forget about preventing cheating. I'd learn the easy way first then do anti-cheat later.

Ah ok, what do these separators do? do they just cut out anything between two given characters?

[Robin]

The separators tell the other side how to split the data. Like punctuation or spaces in human languages.

I'm not sure why BlackBullet called setseperators inside a loop though.
Also: 3100

[Bambo]

The separators tell the other side how to split the data. Like punctuation or spaces in human languages.

I'm not sure why BlackBullet called setseperators inside a loop though.
Also: 3100

oooh, that makes sense

[Bambo]

ah i think i've got this now, im just having trouble sending a big table back with all the X,Y coords of people.

Code: Select all

connected = {
    {10, 10},
    {20, 20}
}

function send()
	lube.bin:setseperators(string.char(30),string.char(31))
	local data = lube.bin:pack( connected )
	server:send(data)
end

That is basicly what i'm sending, but for some reason it doesn't allow it?