techage/solar/minicell.lua

--[[

	TechAge
	=======

	Copyright (C) 2019 Joachim Stolberg

	LGPLv2.1+
	See LICENSE.txt for more information

	TA4 Streetlamp Solar Cell
	
]]--

-- for lazy programmers
local P = minetest.string_to_pos
local M = minetest.get_meta

local S = techage.S

local CYCLE_TIME = 2
local PWR_PERF = 1
local PWR_CAPA = 30 * 20 -- default day

minetest.after(2, function()
	-- calculate the capacity depending on the day duration
	PWR_CAPA = math.max(minetest.get_gametime() / minetest.get_day_count() / 2, PWR_CAPA)
end)

local Cable = techage.ElectricCable
local power = techage.power

local function node_timer(pos, elapsed)
	local mem = tubelib2.get_mem(pos)
	mem.capa = mem.capa or 0
	pos.y = pos.y + 1
	local light = minetest.get_node_light(pos)
	pos.y = pos.y - 1
	
	if light >= (minetest.LIGHT_MAX - 1) then
		if mem.providing then
			power.generator_stop(pos, mem)
			mem.providing = false
			mem.provided = 0
		end
		mem.capa = math.min(mem.capa + PWR_PERF * 1.2, PWR_CAPA)
	else
		if mem.capa > 0 then
			if not mem.providing then
				power.generator_start(pos, mem, PWR_PERF)
				mem.providing = true
			end
			mem.provided = power.generator_alive(pos, mem)
			mem.capa = mem.capa - mem.provided
		else
			power.generator_stop(pos, mem)
			mem.providing = false
			mem.provided = 0
			mem.capa = 0
		end
	end
	mydbg("tst", "PWR_CAPA = "..PWR_CAPA..", mem.capa = "..mem.capa..", light = "..light)
	return true
end

minetest.register_node("techage:ta4_solar_minicell", {
	description = S("TA4 Streetlamp Solar Cell"),
	tiles = {
		-- up, down, right, left, back, front
		"techage_solar_cell_mini_top.png",
		"techage_solar_cell_mini_bottom.png",
		"techage_solar_cell_mini_side.png",
	},
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {
			{-14/32, -8/32, -14/32,  14/32, -6/32, 14/32},
			{-7/32, -16/32, -7/32,  7/32, -8/32, 7/32},
		},
	},
	
	after_place_node = function(pos)
		local meta = minetest.get_meta(pos)
		local number = techage.add_node(pos, "techage:ta4_solar_minicell")
		meta:set_string("number", number)
		meta:set_string("infotext", S("TA4 Streetlamp Solar Cell").." "..number)
		local mem = tubelib2.get_mem(pos)
		mem.capa = 0
		mem.providing = false
		minetest.get_node_timer(pos):start(CYCLE_TIME)
	end,
	
	after_dig_node = function(pos)
		techage.remove_node(pos)
	end,
	
	paramtype2 = "facedir",
	groups = {cracky=2, crumbly=2, choppy=2},
	is_ground_content = false,
	on_timer = node_timer,
})

techage.power.register_node({"techage:ta4_solar_minicell"}, {
	power_network  = Cable,
})

techage.register_node({"techage:ta4_solar_minicell"}, {	
	on_recv_message = function(pos, topic, payload)
		local mem = tubelib2.get_mem(pos)
		if topic == "state" then
			if mem.providing then
				if (mem.provided or 0) > 0 then
					return "discharging"
				else
					return "unused"
				end
			else
				return "charging"
			end
		else
			return "unsupported"
		end
	end,
})

minetest.register_craft({
	output = "techage:ta4_solar_minicell",
	recipe = {
		{"", "", ""},
		{"techage:ta4_silicon_wafer", "techage:ta4_silicon_wafer", "techage:ta4_silicon_wafer"},
		{"default:tin_ingot", "techage:iron_ingot", "default:copper_ingot"},
	},
})