technic/water_mill.lua

minetest.register_alias("water_mill", "technic:water_mill")

minetest.register_craft({
	output = 'technic:water_mill',
	recipe = {
		{'default:stone', 'default:stone', 'default:stone'},
		{'default:wood', 'technic:diamond', 'default:wood'},
		{'default:stone', 'moreores:copper_ingot', 'default:stone'},
	}
})

minetest.register_craftitem("technic:water_mill", {
	description = "Water Mill",
	stack_max = 99,
}) 

water_mill_formspec =
	"invsize[8,4;]"..
	"image[1,1;1,2;technic_power_meter_bg.png]"..
	"label[0,0;Water Mill]"..
	"label[1,3;Power level]"..
	"list[current_player;main;0,5;8,4;]"
	

minetest.register_node("technic:water_mill", {
	description = "Water Mill",
	tiles = {"technic_water_mill_top.png", "technic_machine_bottom.png", "technic_water_mill_side.png",
		"technic_water_mill_side.png", "technic_water_mill_side.png", "technic_water_mill_side.png"},
	paramtype2 = "facedir",
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),
	technic_power_machine=1,
	internal_EU_buffer=0;
	internal_EU_buffer_size=5000;
	burn_time=0;
	on_construct = function(pos)
		local meta = minetest.env:get_meta(pos)
		meta:set_string("infotext", "Water Mill")
		meta:set_float("technic_power_machine", 1)
		meta:set_float("internal_EU_buffer", 0)
		meta:set_float("internal_EU_buffer_size", 3000)
		meta:set_string("formspec", water_mill_formspec)	
		end,	

})

minetest.register_node("technic:water_mill_active", {
	description = "Water Mill",
	tiles = {"technic_water_mill_top_active.png", "technic_machine_bottom.png", "technic_water_mill_side.png",
		"technic_water_mill_side.png", "technic_water_mill_side.png", "technic_water_mill_side.png"},
	paramtype2 = "facedir",
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,not_in_creative_inventory=1},
	legacy_facedir_simple = true,
	sounds = default.node_sound_wood_defaults(),
	drop="technic:water_mill",
	technic_power_machine=1,
	internal_EU_buffer=0;
	internal_EU_buffer_size=0;
})

minetest.register_abm({
	nodenames = {"technic:water_mill","technic:water_mill_active"},
	interval = 1,
	chance = 1,
	action = function(pos, node, active_object_count, active_object_count_wider)

	local meta = minetest.env:get_meta(pos)
	local charge= meta:get_float("internal_EU_buffer")
	local max_charge= meta:get_float("internal_EU_buffer_size")
	local water_nodes = 0
	local lava_nodes = 0
	local production_level=0
	local load_step=0

	pos.x=pos.x+1
	local check=check_node_around_mill (pos)
	if check==1 then water_nodes=water_nodes+1 end
	pos.x=pos.x-2
	check=check_node_around_mill (pos)
	if check==1 then water_nodes=water_nodes+1 end
	pos.x=pos.x+1
	pos.z=pos.z+1
	check=check_node_around_mill (pos)
	if check==1 then water_nodes=water_nodes+1 end
	pos.z=pos.z-2
	check=check_node_around_mill (pos)
	if check==1 then water_nodes=water_nodes+1 end
	pos.z=pos.z+1
	
	if water_nodes==1 then production_level=25 load_step=30 end
	if water_nodes==2 then production_level=50 load_step=60 end
	if water_nodes==3 then production_level=75 load_step=90 end
	if water_nodes==4 then production_level=100 load_step=120 end

        if production_level>0 then
		if charge+load_step>max_charge then
		load_step=max_charge-charge
		end
		if load_step>0 then 
		charge=charge+load_step
		meta:set_float("internal_EU_buffer",charge)
		end
	end

	local load = math.floor((charge/max_charge)*100)
	meta:set_string("formspec",
				"invsize[8,4;]"..
				"image[1,1;1,2;technic_power_meter_bg.png^[lowpart:"..
						(load)..":technic_power_meter_fg.png]"..
				"label[0,0;Water Mill]"..
				"label[1,3;Power level]"..
				"label[4,0;Production at "..tostring(production_level).."%]"
				)
				
	if production_level>0 and minetest.env:get_node(pos).name=="technic:water_mill" then
		hacky_swap_node (pos,"technic:water_mill_active")
		return
	end
	if production_level==0 then hacky_swap_node (pos,"technic:water_mill") end
end
}) 

function check_node_around_mill (pos)
local node=minetest.env:get_node(pos)
if node.name=="default:water_flowing"  then return 1 end
return 0
end