-- A geothermal EU generator
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-- Using hot lava and water this device can create energy from steam
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-- The machine is only producing LV EUs and can thus not drive more advanced equipment
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-- The output is a little more than the coal burning generator (max 300EUs)
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minetest.register_alias("geothermal", "technic:geothermal")
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local S = technic.getter
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minetest.register_craft({
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output = 'technic:geothermal',
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recipe = {
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{'technic:granite', 'default:diamond', 'technic:granite'},
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{'basic_materials:copper_wire', 'technic:machine_casing', 'basic_materials:copper_wire'},
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{'technic:granite', 'technic:lv_cable', 'technic:granite'},
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},
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replacements = {
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{"basic_materials:copper_wire", "basic_materials:empty_spool"},
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{"basic_materials:copper_wire", "basic_materials:empty_spool"}
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},
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})
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minetest.register_craftitem("technic:geothermal", {
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description = S("Geothermal %s Generator"):format("LV"),
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})
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local check_node_around = function(pos)
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local node = minetest.get_node(pos)
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if node.name == "default:water_source" or node.name == "default:water_flowing" then return 1 end
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if node.name == "default:lava_source" or node.name == "default:lava_flowing" then return 2 end
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return 0
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end
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local run = function(pos, node)
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local meta = minetest.get_meta(pos)
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local water_nodes = 0
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local lava_nodes = 0
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local production_level = 0
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local eu_supply = 0
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-- Correct positioning is water on one side and lava on the other.
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-- The two cannot be adjacent because the lava the turns into obsidian or rock.
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-- To get to 100% production stack the water and lava one extra block down as well:
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-- WGL (W=Water, L=Lava, G=the generator, |=an LV cable)
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-- W|L
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local positions = {
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{x=pos.x+1, y=pos.y, z=pos.z},
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{x=pos.x+1, y=pos.y-1, z=pos.z},
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{x=pos.x-1, y=pos.y, z=pos.z},
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{x=pos.x-1, y=pos.y-1, z=pos.z},
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{x=pos.x, y=pos.y, z=pos.z+1},
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{x=pos.x, y=pos.y-1, z=pos.z+1},
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{x=pos.x, y=pos.y, z=pos.z-1},
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{x=pos.x, y=pos.y-1, z=pos.z-1},
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}
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for _, p in pairs(positions) do
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local check = check_node_around(p)
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if check == 1 then water_nodes = water_nodes + 1 end
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if check == 2 then lava_nodes = lava_nodes + 1 end
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end
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if water_nodes == 1 and lava_nodes == 1 then production_level = 25; eu_supply = 50 end
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if water_nodes == 2 and lava_nodes == 1 then production_level = 50; eu_supply = 100 end
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if water_nodes == 1 and lava_nodes == 2 then production_level = 75; eu_supply = 200 end
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if water_nodes == 2 and lava_nodes == 2 then production_level = 100; eu_supply = 300 end
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if production_level > 0 then
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meta:set_int("LV_EU_supply", eu_supply)
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end
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meta:set_string("infotext",
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S("Geothermal %s Generator"):format("LV").." ("..production_level.."%)")
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if production_level > 0 and minetest.get_node(pos).name == "technic:geothermal" then
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technic.swap_node (pos, "technic:geothermal_active")
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return
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end
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if production_level == 0 then
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technic.swap_node(pos, "technic:geothermal")
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meta:set_int("LV_EU_supply", 0)
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end
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end
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minetest.register_node("technic:geothermal", {
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description = S("Geothermal %s Generator"):format("LV"),
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tiles = {"technic_geothermal_top.png", "technic_machine_bottom.png", "technic_geothermal_side.png",
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"technic_geothermal_side.png", "technic_geothermal_side.png", "technic_geothermal_side.png"},
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groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2,
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technic_machine=1, technic_lv=1},
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paramtype2 = "facedir",
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legacy_facedir_simple = true,
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sounds = default.node_sound_wood_defaults(),
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on_construct = function(pos)
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local meta = minetest.get_meta(pos)
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meta:set_string("infotext", S("Geothermal %s Generator"):format("LV"))
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meta:set_int("LV_EU_supply", 0)
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end,
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technic_run = run,
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})
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minetest.register_node("technic:geothermal_active", {
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description = S("Geothermal %s Generator"):format("LV"),
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tiles = {"technic_geothermal_top_active.png", "technic_machine_bottom.png", "technic_geothermal_side.png",
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"technic_geothermal_side.png", "technic_geothermal_side.png", "technic_geothermal_side.png"},
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paramtype2 = "facedir",
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groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2,
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technic_machine=1, technic_lv=1, not_in_creative_inventory=1},
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legacy_facedir_simple = true,
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sounds = default.node_sound_wood_defaults(),
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drop = "technic:geothermal",
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technic_run = run,
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})
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technic.register_machine("LV", "technic:geothermal", technic.producer)
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technic.register_machine("LV", "technic:geothermal_active", technic.producer)
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