From 0747801d50ed5d79af5b2d02387c404b07920d57 Mon Sep 17 00:00:00 2001
From: tacigar <ig.lhound@gmail.com>
Date: Fri, 9 Dec 2016 19:04:07 +0900
Subject: [PATCH] update

---
 maidroid_core/cores/farming.lua | 128 +++++++++++++++++++++++++++++++-
 1 file changed, 125 insertions(+), 3 deletions(-)

diff --git a/maidroid_core/cores/farming.lua b/maidroid_core/cores/farming.lua
index 33c680d..991a28d 100644
--- a/maidroid_core/cores/farming.lua
+++ b/maidroid_core/cores/farming.lua
@@ -4,15 +4,86 @@
 ------------------------------------------------------------
 
 local state = {
-
+	WALK_RANDOMLY = 0,
+	WALK_TO_PLANT = 1,
+	WALK_TO_MOW   = 2,
+	MOW           = 3,
+	PLANT         = 4,
 }
 
-local function on_start(self)
+local searching_range = {
+	x = 5,
+	y = 1,
+	z = 5,
+}
 
+local target_plants = {
+	"farming:cotton_8",
+	"farming:wheat_8",
+}
+
+local SEARCHING_TIME_INTERVAL = 20
+local MOWING_TIME = 5
+local TO_TARGET_DISTANCE = 1.25
+
+-- has_seed_item reports whether maidroid has seed items.
+local function has_seed_item(self)
+	local inv = self:get_inventory()
+	local stack_list = inv:get_list("main")
+
+	for _, stack in ipairs(stacks) do
+		local itemname = stack:get_name()
+		if minetest.get_item_group(item_name, "seed") > 0 then
+			return true
+		end
+	end
+	return false
+end
+
+-- is_plantable_place reports whether maidroid can plant any seed.
+local function is_plantable_place(pos)
+	local node = minetest.get_node(pos)
+	local lpos = vector.sub(pos, {x = 0, y = -1, z = 0})
+	local lnode = minetest.get_node(lpos)
+	return node.name == "air" 
+		and minetest.get_item_group(lnode.name, "wet") > 0
+end
+
+-- is_mowable_place reports whether maidroid can mow.
+local function is_mowable_place(pos)
+	local node = minetest.get_node(pos)
+	for _, target in ipairs(target_plants) do
+		if node.name == target then
+			return true
+		end
+	end
+	return false
+end
+
+-- search surrounding searchs maidroid surrounding.
+local function search_surrounding(self, pred)
+	for x = -searching_range.x, searching_range.x do
+		for y = -searching_range.y, searching_range.y do
+			for z = -searching_range.z, searching_range.z do
+				local pos = {x = x, y = y, z = z}
+				if pred(self, pos) then
+					return pos
+				end
+			end
+		end
+	end
+	return nil
+end
+
+local function on_start(self)
+	self.state = state.WALK_RANDOMLY
+	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:setvelocity{x = 0, y = 0, z = 0}
 end
 
 local on_resume = on_start
@@ -20,7 +91,58 @@ local on_resume = on_start
 local on_pause = on_stop
 
 local function on_step(self, dtime)
+	if self.state == state.WALK_RANDOMLY then
+		if self.time_counter >= SEARCHING_TIME_INTERVAL then
+			self.time_counter = 0 -- reset time_counter
 
+			if self:has_seed_item() then
+				local d = search_surrounding(is_plantable_place)
+				if d ~= nil then
+					self.state = state.WALK_TO_PLANT
+					self.destination = d
+					return
+				end
+			end
+
+			local d = search_surrounding(is_mowable_place)
+			if d ~= nil then
+				self.state = state.WALK_TO_MOW
+				self.destination = d
+				return
+			end
+		else
+			self.time_counter = self.time_counter + 1
+		end
+	elseif self.state == state.MOW then
+
+	elseif self.state == state.PLANT then
+
+	elseif self.state == state.WALK_TO_MOW then
+		local pos = self.object:getpos()
+		if vector.distance(pos, self.destination) < TO_TARGET_DISTANCE then
+			local destination_node = minetest.get_node(self.destination)
+
+			if is_target_plant(destination_node.name) then
+				self.state = state.MOW
+			else
+				
+			end
+		elseif hoge then
+			
+		end
+	elseif self.state == state.WALK_TO_PLANT then
+		local pos = self.object:getpos()
+		if vector.distance(pos, self.destination) < TO_TARGET_DISTANCE then
+			local destination_node = minetest.get_node(self.destiantion)
+
+			if is_plantable_place(self.destination) then
+
+			else
+				
+			end
+		elseif hoge then
+		end
+	end
 end
 
 maidroid.register_core("maidroid_core:farming", {