func main() {
server := len(os.Args) > 1 && os.Args[1] == "server"
var gameEngine engine.Engine
var glRenderer *opengl.OpenglRenderer
network := networking.NewNetwork()
// Start server or connect to server
if server {
gameEngine = engine.NewHeadlessEngine()
network.StartServer(serverPort)
} else {
glRenderer = opengl.NewOpenglRenderer("Networking example", 800, 800, false)
gameEngine = engine.NewEngine(glRenderer)
network.ConnectClient(fmt.Sprintf("%v:%v", serverAddr, serverPort))
}
gameEngine.AddUpdatable(network)
// map containing each player's entity
players := make(map[string]*Player)
//Networked Game events
network.ClientJoinedEvent(func(clientId string) {
fmt.Println("client joined, clientId: ", clientId)
network.TriggerOnServerAndClients("spawn", util.SerializeArgs(clientId, startingPosition))
for _, player := range players {
network.TriggerEvent("spawn", clientId, util.SerializeArgs(player.clientId, player.position))
}
})
network.RegisterEvent("spawn", func(clientId string, data []byte) {
buf := bytes.NewBuffer(data)
playerID := util.Stringfrombytes(buf)
position := util.Vector2frombytes(buf)
if _, ok := players[playerID]; !ok {
player := &Player{clientId: playerID}
players[player.clientId] = player
player.node = renderer.NewNode()
player.position = position
gameEngine.AddUpdatable(player)
if network.IsClient() {
boxGeometry := renderer.CreateBox(30, 30)
boxGeometry.SetColor(color.NRGBA{254, 0, 0, 254})
player.node.Add(boxGeometry)
gameEngine.AddOrtho(player.node)
}
}
})
network.RegisterEvent("move", func(clientId string, data []byte) {
buf := bytes.NewBuffer(data)
playerID := util.Stringfrombytes(buf)
velocity := util.Vector2frombytes(buf)
if network.IsServer() && clientId != playerID {
return // client is only allowed to control the player assigned to them.
}
if player, ok := players[playerID]; ok {
player.velocity = velocity
if network.IsServer() {
network.BroadcastEvent("updatePlayer", util.SerializeArgs(playerID, player.position, player.velocity))
network.FlushAllWriteBuffers()
}
}
})
network.RegisterEvent("updatePlayer", func(clientId string, data []byte) {
if network.IsClient() { // This is a server to client update only
buf := bytes.NewBuffer(data)
playerID := util.Stringfrombytes(buf)
position := util.Vector2frombytes(buf)
velocity := util.Vector2frombytes(buf)
if player, ok := players[playerID]; ok {
player.position = position
player.velocity = velocity
}
}
})
// client setup
gameEngine.Start(func() {
if network.IsClient() {
gameEngine.InitFpsDial()
if shader, err := assets.ImportShader("shaders/build/basic.vert", "shaders/build/basic.frag"); err == nil {
gameEngine.DefaultShader(shader)
}
glRenderer.BackGroundColor(0, 0.4, 0, 0)
// input/controller manager
controllerManager := glfwController.NewControllerManager(glRenderer.Window)
// networked movement controls
move := func(velocity mgl32.Vec2) {
network.TriggerOnServerAndClients("move", util.SerializeArgs(network.ClientToken(), velocity))
}
customController := controller.CreateController()
controllerManager.AddController(customController.(glfwController.Controller))
customController.BindKeyAction(func() { move(mgl32.Vec2{0, -100}) }, controller.KeyW, controller.Press)
customController.BindKeyAction(func() { move(mgl32.Vec2{-100, 0}) }, controller.KeyA, controller.Press)
customController.BindKeyAction(func() { move(mgl32.Vec2{0, 100}) }, controller.KeyS, controller.Press)
customController.BindKeyAction(func() { move(mgl32.Vec2{100, 0}) }, controller.KeyD, controller.Press)
customController.BindKeyAction(func() { move(mgl32.Vec2{}) }, controller.KeyW, controller.Release)
customController.BindKeyAction(func() { move(mgl32.Vec2{}) }, controller.KeyA, controller.Release)
customController.BindKeyAction(func() { move(mgl32.Vec2{}) }, controller.KeyS, controller.Release)
customController.BindKeyAction(func() { move(mgl32.Vec2{}) }, controller.KeyD, controller.Release)
}
})
}
