[UPDATE] Update register -> core/basic

maidroid_core/cores/basic.lua

@@ -0,0 +1,68 @@
+------------------------------------------------------------
+-- Copyright (c) 2016 tacigar. All rights reserved.
+-- https://github.com/tacigar/maidroid
+------------------------------------------------------------
+
+local state = {IDLE = 0, ACCOMPANY = 1}
+
+local function on_start(self)
+	self.state = state.IDLE
+	self.object:setacceleration{x = 0, y = -10, z = 0}
+	self.object:setvelocity{x = 0, y = 0, z = 0}
+end
+
+local function on_stop(self)
+	self.state = nil
+	self.object:setvelocty{x = 0, y = 0, z = 0}
+end
+
+local on_resume = on_start
+
+local on_pause = on_stop
+
+local function on_step(self, dtime)
+	local player = self:get_nearest_player(10)
+	if player == nil then
+		self:set_animation(maidroid.animation_frames.STAND)
+		return
+	end
+
+	local position = self.object:getpos()
+	local player_position = player:getpos()
+	local direction = vector.subtract(player_position, position)
+	local velocity = self.object:getvelocity()
+
+	if vector.length(direction) < 3 then
+		if self.state == state.ACCOMPANY then
+			self:set_animation(maidroid.animation_frames.STAND)
+			self.state = state.IDLE
+			self.object:setvelocity{x = 0, y = velocity.y, z = 0}
+		end
+	else
+		if self.state == state.IDLE then
+			self:set_animation(maidroid.animation_frames.WALK)
+			self.state = state.ACCOMPANY
+		end
+		self.object:setvelocity{x = direction.x, y = velocity.y, z = direction.z} -- TODO
+	end
+	self:set_yaw_by_direction(direction)
+
+	-- if maidroid is stoped by obstacle, the maidroid must jump.
+	if velocity.y == 0 and self.state == state.ACCOMPANY then
+		local front_node = self:get_front_node()
+		if front_node.name ~= "air" then
+			self.object:setvelocity{x = direction.x, y = 5, z = direction.z}
+		end
+	end
+end
+
+-- register a definition of a new core.
+maidroid.register_core("maidroid_core:basic", {
+	description      = "maidroid core : basic",
+	inventory_image  = "maidroid_core_basic.png",
+	on_start         = on_start,
+	on_stop          = on_stop,
+	on_resume        = on_resume,
+	on_pause         = on_pause,
+	on_step          = on_step,
+})