player.lua

-- controls if a player is controllable with input.
-- other multiplayer clients are not controllable.
go.property("controllable", true)

-- ------------------------------------------------------------
-- needed only by the authority. The client moves via messages.
-- ------------------------------------------------------------
--#IF HEADLESS
local moving_x = 0
local moving_y = 0
--#ENDIF

function init(self)
	if self.controllable then
		msg.post(".", "acquire_input_focus")
	end
end

function update(self, dt)
	-- -------------------------------------------------
	-- physics movement only performed by game server!!!
	-- -------------------------------------------------

	--#IF HEADLESS
	local lv = go.get("#collisionobject", "linear_velocity")
	local new_lv = lv + vmath.vector3(moving_x, moving_y, 0) * dt * 100
	go.set("#collisionobject", "linear_velocity", new_lv)
	--#ENDIF
end

function fixed_update(self, dt)
	--#IF HEADLESS
	local lv = go.get("#collisionobject", "linear_velocity")
	local pos = go.get_position()
	msg.post("/network#network", "linear_velocity", {
		linear_velocity = {
			x = lv.x,
			y = lv.y
		},
		position = {
			x = pos.x,
			y = pos.y
		},
		moving_x = moving_x,
		moving_y = moving_y,
		goid = go.get_id()
	})
	--#ENDIF
end

function on_message(self, message_id, message, sender)
	-- ------------------------------
	-- MOVEMENT HANDLING VIA MESSAGES
	-- ------------------------------

	--#IF HEADLESS
	if message_id == hash("moving") then
		local x = message.moving_x
		local y = message.moving_y

		moving_x = x
		moving_y = y
	end
	--#ELSE
	if message_id == hash("linear_velocity")  then
		go.set("#collisionobject", "linear_velocity", vmath.vector3(message.linear_velocity.x, message.linear_velocity.y, 0))
	end
	--#ENDIF
end

function on_input(self, action_id, action)
	-- ------------------
	-- KEY PRESS HANDLING
	-- ------------------

	if action_id == hash("left") then
		if action.pressed then
			msg.post("/network#network", "pressed_left")
		elseif action.released then
			msg.post("/network#network", "released_left")
		end
	end
	if action_id == hash("right") then
		if action.pressed then
			msg.post("/network#network", "pressed_right")
		elseif action.released then
			msg.post("/network#network", "released_right")
		end
	end
	if action_id == hash("up") then
		if action.pressed then
			msg.post("/network#network", "pressed_up")
		elseif action.released then
			msg.post("/network#network", "released_up")
		end
	end
	if action_id == hash("down") then
		if action.pressed then
			msg.post("/network#network", "pressed_down")
		elseif action.released then
			msg.post("/network#network", "released_down")
		end
	end
end