Online game

[NikitaPupy]

now i am making an online game, and i have this bug:
function that sends data on server and gets a response is taking a while to continue script and return those values, but if i do it every frame, game gets very laggy, i have like 2 fps in the game, how do i place this function in another loop, so it would work outside of love.update?

[keharriso]

Networking is complicated. It's hard to diagnose the problem without some sample code.

[dusoft]

You might use love.thread module.

[NikitaPupy]

Now i have this code, i have fixed it a little, because networking function didnt even run

Code: Select all

require("json")
local http = require("socket.http")
local ltn12 = require("ltn12")

local threadChannel = love.thread.getChannel("threadChannel")

function sendData(params)
	print("A")
	local serverUrl = "http://pixelhogstudios.com/testserver/"
	local fullUrl = serverUrl .. "?" .. params

	local response = {}
	local result, statusCode, headers = http.request{
		url = fullUrl,
		sink = ltn12.sink.table(response)
	}

	if statusCode == 200 then
		responseData = table.concat(response)
		threadChannel:push(responseData)
		return response[1]
	else
		print("Error")
		threadChannel:push(nil)
	end

end

print(sendData("operation=movement&playerId=1&x=5&y=190"))

player1 = {}
player1.x = 100
player1.y = 100
player2 = {}
player2.x = 100
player2.y = 100
playerId = 0
speed = 5

function networking()
	while true do
		if playerId == 1 then
			local encodedData = sendData("operation=movement&playerId=" .. playerId .. "&x=" .. player1.x .. "&y=" .. player1.y)
			local decodedString = json.decode(encodedData)
			print(decodedString.x)
			player2.x = decodedString.x
			player2.y = decodedString.y
		elseif playerId == 2 then
			local encodedData = sendData("operation=movement&playerId=" .. playerId .. "&x=" .. player1.x .. "&y=" .. player1.y)
			local decodedString = json.decode(encodedData)
			print(decodedString.x)
			player1.x = decodedString.x
			player1.y = decodedString.y
		end
		coroutine.yield()
	end
end

function mainLoop()
	while true do
		if playerId == 0 then
			if love.keyboard.isDown("1") then
				playerId = 1
				if love.keyboard.isDown("r") then
					sendData("operation=registration&playerId=1")
				else
					sendData("operation=login&playerId=1")
				end
			elseif love.keyboard.isDown("2") then
				playerId = 2
				if love.keyboard.isDown("r") then
					sendData("operation=registration&playerId=2")
				else
					sendData("operation=login&playerId=2")
				end
			end
		elseif playerId == 1 then
			if love.keyboard.isDown("w") then
				player1.y = player1.y - speed
			end
			if love.keyboard.isDown("a") then
				player1.x = player1.x - speed
			end
			if love.keyboard.isDown("s") then
				player1.y = player1.y + speed
			end
			if love.keyboard.isDown("d") then
				player1.x = player1.x + speed
			end
		elseif playerId == 2 then
			if love.keyboard.isDown("w") then
				player2.y = player2.y - speed
			end
			if love.keyboard.isDown("a") then
				player2.x = player2.x - speed
			end
			if love.keyboard.isDown("s") then
				player2.y = player2.y + speed
			end
			if love.keyboard.isDown("d") then
				player2.x = player2.x + speed
			end
		end
		coroutine.yield()
	end
end

function love.update(dt)
    coroutine.resume(coroutine.create(networking))
	coroutine.resume(coroutine.create(mainLoop))
end

function love.draw()
    love.graphics.rectangle("fill", player1.x, player1.y, 100, 100)
    love.graphics.rectangle("fill", player2.x, player2.y, 100, 100)
end

but the game is very laggy, and i dont get decodedString.x print at all, so does the player position exchanging, i also get prints with text "A"

[dusoft]

I understand you are sending update with each position (pixel) change. That's a very naive approach and might either kill your server and/or lag your client.

You might read some tutorials on how to do some client-side prediction instead of sending every pixel change:
https://kinematicsoup.com/news/2017/5/3 ... prediction

Good luck.

[RNavega]

For real-time communication between a client (the players) and server (you), there's the WebSocket specification.
Some links:

• https://www.pubnub.com/guides/websockets/

• https://ably.com/topic/pub-sub-vs-websockets

• https://github.com/flaribbit/love2d-lua-websocket (thanks @flaribbit)