function init(self)
	-- Add initialization code here
	-- Learn more: https://defold.com/manuals/script/
	-- Remove this function if not needed
end

function final(self)
	-- Add finalization code here
	-- Learn more: https://defold.com/manuals/script/
	-- Remove this function if not needed
end

function update(self, dt)
	-- Add update code here
	-- Learn more: https://defold.com/manuals/script/
	-- Remove this function if not needed
end

function fixed_update(self, dt)
	-- This function is called if 'Fixed Update Frequency' is enabled in the Engine section of game.project
	-- Can be coupled with fixed updates of the physics simulation if 'Use Fixed Timestep' is enabled in
	-- Physics section of game.project
	-- Add update code here
	-- Learn more: https://defold.com/manuals/script/
	-- Remove this function if not needed
end

function on_message(self, message_id, message, sender)
	-- Add message-handling code here
	-- Learn more: https://defold.com/manuals/message-passing/
	-- Remove this function if not needed
end

local function screen_to_world(x, y, z, camera_id)
	local projection = camera.get_projection(camera_id)
	local view = camera.get_view(camera_id)
	local w, h = window.get_size()

	-- https://defold.com/manuals/camera/#converting-mouse-to-world-coordinates
	local inv = vmath.inv(projection * view)
	x = (2 * x / w) - 1
	y = (2 * y / h) - 1
	z = (2 * z) - 1
	local x1 = x * inv.m00 + y * inv.m01 + z * inv.m02 + inv.m03
	local y1 = x * inv.m10 + y * inv.m11 + z * inv.m12 + inv.m13
	local z1 = x * inv.m20 + y * inv.m21 + z * inv.m22 + inv.m23
	return x1, y1, z1
end

function on_input(self, action_id, action)
	if action_id == hash("left-click") and action.pressed then
		self.next_state = "moving"
		local tx, ty, _ = screen_to_world(action.screen_x, action.screen_y, 0, "/CameraParent#camera")
		self.target_pos = vmath.vector3(tx, ty, 0)
	elseif action_id == hash("right-click") then

	end
end

function on_reload(self)
	-- Add reload-handling code here
	-- Learn more: https://defold.com/manuals/hot-reload/
	-- Remove this function if not needed
end
