284 lines
7.8 KiB
Lua
284 lines
7.8 KiB
Lua
--[[
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TechAge
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=======
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Copyright (C) 2019 Joachim Stolberg
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GPL v3
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See LICENSE.txt for more information
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Coalburner as heater for the Meltingpot
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]]--
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local S = techage.S
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local COAL_BURN_TIME = 1200
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local CYCLE_TIME = 5
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local function get_node_lvm(pos)
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local node = minetest.get_node_or_nil(pos)
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if node then
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return node
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end
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local vm = minetest.get_voxel_manip()
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local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
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local data = vm:get_data()
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local param2_data = vm:get_param2_data()
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local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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local idx = area:indexp(pos)
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node = {
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name = minetest.get_name_from_content_id(data[idx]),
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param2 = param2_data[idx]
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}
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return node
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end
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local function num_coal(pos)
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local pos1 = {x=pos.x, y=pos.y+1, z=pos.z}
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local pos2 = {x=pos.x, y=pos.y+32, z=pos.z}
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local nodes = minetest.find_nodes_in_area(pos1, pos2, {"techage:charcoal", "techage:charcoal_burn"})
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return #nodes
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end
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local function num_cobble(pos, height)
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local pos1 = {x=pos.x-1, y=pos.y+1, z=pos.z-1}
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local pos2 = {x=pos.x+1, y=pos.y+height, z=pos.z+1}
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local nodes = minetest.find_nodes_in_area(pos1, pos2, {"default:cobble", "default:desert_cobble"})
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return #nodes
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end
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local function num_air(pos)
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local pos1 = {x=pos.x-1, y=pos.y, z=pos.z-1}
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local pos2 = {x=pos.x+1, y=pos.y, z=pos.z+1}
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local nodes = minetest.find_nodes_in_area(pos1, pos2, {"air"})
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return #nodes
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end
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local function start_burner(pos, height)
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local pos1 = {x=pos.x-1, y=pos.y+1, z=pos.z-1}
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local pos2 = {x=pos.x+1, y=pos.y+height, z=pos.z+1}
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for _,p in ipairs(minetest.find_nodes_in_area(pos1, pos2, "techage:charcoal")) do
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minetest.swap_node(p, {name = "techage:charcoal_burn"})
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end
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end
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local function remove_coal(pos, height)
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local pos1 = {x=pos.x-1, y=pos.y+1, z=pos.z-1}
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local pos2 = {x=pos.x+1, y=pos.y+height, z=pos.z+1}
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for _,p in ipairs(minetest.find_nodes_in_area(pos1, pos2, "techage:charcoal_burn")) do
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minetest.remove_node(p)
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end
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end
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local function remove_flame(pos, height)
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local idx
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pos = {x=pos.x, y=pos.y+height, z=pos.z}
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for idx=height,1,-1 do
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pos = {x=pos.x, y=pos.y+1, z=pos.z}
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local node = get_node_lvm(pos)
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if string.find(node.name, "techage:flame") then
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minetest.remove_node(pos)
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elseif node.name == "techage:meltingpot" then
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techage.update_heat(pos)
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end
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end
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end
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local function calc_num_coal(height, burn_time)
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local num = height
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if burn_time < 0 then
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local x = (COAL_BURN_TIME * 0.2) / height
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num = math.max(height + math.floor(burn_time/x), 0)
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end
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return num
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end
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local function flame(pos, height, heat, first_time)
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local idx
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pos = {x=pos.x, y=pos.y+height, z=pos.z}
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for idx=heat,1,-1 do
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pos = {x=pos.x, y=pos.y+1, z=pos.z}
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idx = math.min(idx, 12)
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local node = get_node_lvm(pos)
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if node.name == "techage:meltingpot_active" or node.name == "ignore" then
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return
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end
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if node.name == "techage:meltingpot" then
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if first_time then
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techage.switch_to_active(pos)
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else
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techage.update_heat(pos)
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end
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return
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end
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minetest.add_node(pos, {name = "techage:flame"..math.min(idx,7)})
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local meta = minetest.get_meta(pos)
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meta:set_int("heat", idx)
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end
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end
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local lRatio = {120, 110, 95, 75, 55, 28, 0}
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local lColor = {"000080", "400040", "800000", "800000", "800000", "800000", "800000"}
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for idx,ratio in ipairs(lRatio) do
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local color = "techage_flame_animated.png^[colorize:#"..lColor[idx].."B0:"..ratio
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minetest.register_node("techage:flame"..idx, {
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tiles = {
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{
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name = color,
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 1
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},
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},
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},
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after_destruct = function(pos, oldnode)
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pos.y = pos.y + 1
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local node = get_node_lvm(pos)
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if minetest.get_item_group(node.name, "techage_flame") > 0 then
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minetest.remove_node(pos)
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end
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end,
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drawtype = "glasslike",
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use_texture_alpha = true,
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inventory_image = "techage_flame.png",
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paramtype = "light",
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light_source = 13,
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walkable = false,
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buildable_to = true,
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floodable = true,
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sunlight_propagates = true,
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damage_per_second = 4 + idx,
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groups = {igniter = 2, dig_immediate = 3, techage_flame=1, not_in_creative_inventory=1},
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drop = "",
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})
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end
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minetest.register_node("techage:ash", {
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description = S("Ash"),
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tiles = {"techage_ash.png"},
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drawtype = "nodebox",
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node_box = {
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type = "fixed",
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fixed = {
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{-4/8, -4/8, -4/8, 4/8, -3/8, 4/8},
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},
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},
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is_ground_content = false,
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groups = {crumbly = 3, not_in_creative_inventory=1},
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drop = "",
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sounds = default.node_sound_defaults(),
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})
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function techage.start_burner(pos, playername)
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local height = num_coal(pos)
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if minetest.is_protected(
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{x=pos.x, y=pos.y+height, z=pos.z},
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playername) then
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return
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end
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if num_cobble(pos, height) == height * 8 then
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local meta = minetest.get_meta(pos)
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--meta:set_int("ignite", minetest.get_gametime())
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meta:set_int("burn_time", COAL_BURN_TIME)
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meta:set_int("height", height)
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start_burner(pos, height)
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flame(pos, height, height, true)
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local handle = minetest.sound_play("techage_gasflare", {
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pos = {x=pos.x, y=pos.y+height, z=pos.z},
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max_hear_distance = 20,
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gain = height/12.0,
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loop = true})
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meta:set_int("handle", handle)
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minetest.get_node_timer(pos):start(CYCLE_TIME)
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end
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end
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function techage.keep_running_burner(pos)
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local meta = minetest.get_meta(pos)
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local height = meta:get_int("height")
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remove_flame(pos, height)
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local handle = meta:get_int("handle")
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if handle then
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minetest.sound_stop(handle)
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meta:set_int("handle", 0)
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end
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local burn_time = meta:get_int("burn_time")
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-- burner hole is open
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if num_air(pos) == 1 then
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meta:set_int("burn_time", burn_time - CYCLE_TIME)
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-- tower intact
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if num_cobble(pos, height) == height * 8 then
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local num_coal = calc_num_coal(height, burn_time)
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if num_coal > 0 then
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if meta:get_int("paused") == 1 then
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flame(pos, height, num_coal, true)
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meta:set_int("paused", 0)
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else
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flame(pos, height, num_coal, false)
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end
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handle = minetest.sound_play("techage_gasflare", {
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pos = {x=pos.x, y=pos.y+height, z=pos.z},
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max_hear_distance = 32,
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gain = num_coal/12.0,
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loop = true})
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meta:set_int("handle", handle)
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else
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minetest.swap_node(pos, {name="techage:ash"})
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remove_coal(pos, height)
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return false
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end
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else
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minetest.swap_node(pos, {name="techage:ash"})
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remove_coal(pos, height)
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return false
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end
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else
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meta:set_int("paused", 1)
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end
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return true
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end
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function techage.stop_burner(pos)
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local meta = minetest.get_meta(pos)
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local height = meta:get_int("height")
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remove_flame(pos, height)
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remove_coal(pos, height)
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local handle = meta:get_int("handle")
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minetest.sound_stop(handle)
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meta:set_int("burn_time", 0)
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end
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local BurnerHelp = S("Coal Burner to heat the melting pot:@n"..
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"- build cobble tower with a 3x3 footprint@n"..
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"- more height means more flame heat@n"..
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"- keep a hole open on one side@n"..
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"- put a lighter in@n"..
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"- fill the tower from the top with charcoal@n"..
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"- ignite the lighter@n"..
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"- place the pot in the flame, (one block above the tower)@n"..
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"- to pause the burner, close the hole temporarily with e.g. dirt@n"..
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"(see plan)")
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local BurnerImages = {
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{false, false, false, "default_cobble.png^techage_meltingpot.png", false},
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{false, false, false, "techage_flame.png", false},
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{false, false, "default_cobble.png", "techage_charcoal.png", "default_cobble.png"},
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{false, false, "default_cobble.png", "techage_charcoal.png", "default_cobble.png"},
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{false, false, "default_cobble.png", "techage_charcoal.png", "default_cobble.png"},
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{false, false, "default_cobble.png", "techage_charcoal.png", "default_cobble.png"},
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{false, false, false, "techage_lighter.png", "default_cobble.png"},
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{false, false, "default_cobble.png", "default_cobble.png", "default_cobble.png"},
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}
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techage.register_entry_page("ta1", "burner", S("Coal Burner"), BurnerHelp, nil, BurnerImages)
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